Rolls-Royce Archives
| Identifier | Entry | ||
| scan0001 | Letter to Major B.C. Carter detailing the method for correcting tests on a complete shaft to determine single crank stiffness. | ||
| View original record | J634 Mailed Hs/SEL/T. 29th March, 1929. Major B.C. Carter, Royal Aircraft Establishment, South Farnborough, Hants. Dear Major Carter, I enclose some further information which I hope will cover the… | ||
| scan0002 | Comparison of observed and calculated critical speeds for various engines using different calculation methods. | ||
| View original record | Contd. -2- This gives much closer agreement with your formula, as shown. The test on 15 C was done before my time, and I should not be perturbed over the large error - 19%. We have had plenty of… | ||
| scan0003 | Table comparing crankshaft dimensions, twist, and stiffness for various engine models. | ||
| View original record | Vertical text right: CRANK SHAFT STIFFNESSES. TABLE 1. SHOWING CORRECTIONS APPLIED TO OBTAIN A TEST STIFFNESS. Vertical text left: TEST 28/3/29 Top Table Section: Row 1 Headers: PART NUMBER., ENGINE.,… | ||
| scan0004 | Table comparing calculated and observed critical speeds for various engines. | ||
| View original record | TBR. 28/2/28 EXAMPLES OF CALCULATED CRITICAL SPEEDS. Fig 4 Column Headers: ENGINE. C/SHAFT STIFFNESS LBS.FT./RAD I OF C/SHAFT SLUGS-FT4 I OF BIG ENDS 6 x r² I OF PISTONS ETC. 6 x r²/2 I OF SPRING… | ||
| scan0005 | Table calculating torsional vibration periods for various car engines using the 'System of Flywheels' method. | ||
| View original record | Vertical Title: TORSIONAL VIBRATION PERIODS OF CAR ENGINES CALCULATED BY "SYSTEM OF FLYWHEELS" METHOD Stamp (Top Left): ENTRY CHECKED 3 APR 1929 Top Right Corner: Tsn. 29/3/23 TABLE HEADERS (Row… | ||
| scan0006 | Letter to Major B.C. Carter discussing the method for correcting and calculating the stiffness of a single crank from tests on a complete shaft. | ||
| View original record | Y634 Hs/SEL/T. 28th March, 1929. Y634 X.4498 Major B.C. Carter, Royal Aircraft Establishment, South Farnborough, Hants. Dear Major Carter, I enclose some further information which I hope will cover… | ||
| scan0007 | Comparison of observed versus calculated critical speeds for various engine models using different methods. | ||
| View original record | Contd. -2- This gives much closer agreement with your formula, as shown. The test on 15 C was done before my time, and I should not be perturbed over the large error - 19%. We have had plenty of… | ||
| scan0008 | Standardisation of a 20 HP stiffer crankshaft. | ||
| View original record | RR 755 REVISED (10H) (D.C. 777-29-2-28) MC C.LTD X634 COMPLETE 25.10.29 STANDARDISATION of CHASSIS PARTS. Date 24.4.29 X No. 5010 Drawing No. X634 Part List Description of Parts: 20 HP. STIFFER… | ||
| scan0009 | The fitting of a new part to a chassis, including test date and associated costs. | ||
| View original record | The number of the first chassis on which the new part will be fitted. P. series. Date when chassis will be handed to test. 23.9.29. Cost of scrapped material, if any. Nil. Cost of jigs and tools. £100… | ||
| scan0010 | Design, materials, and adjustment of car engine crankshaft dampers for various models. | ||
| View original record | X634 HS. } FROM R. By. } C. to Sg. SECRET R2/M3.6.29. CAR ENGINES CRANKSHAFT DAMPER. X634 X5010 X7010 I am inclined to think that the reason these have been more difficult and exacting in their… | ||
| scan0011 | The Chrysler '75' car, detailing its general particulars and engine specifications. | ||
| View original record | X634 To R: from Hs/Tsn. c. to Sg. Wor. c. to E. DA. c. to RG. BY. Hs/Tsn1/LG14.6.29. REPORT ON CHRYSLER '75'. X4012 The following report gives descriptions of the principal parts of this car in which… | ||
| scan0012 | Page detailing engine specifications, a comparison of valve areas, and a description of the valve gear mechanism. | ||
| View original record | contd :- -2- Choke dia 1.187" Induction pipe uptake above choke 1.425" Induction ports on block 1.425" Inlet valve head dia. 1.725" Exhaust " " " 1.600" Valve lift .312 Valve stem dia. .340 Length… | ||
| scan0013 | Specifications for engine cams, springs, valve timing, and the oiling system. | ||
| View original record | contd :- -3- The cams are fairly wide, namely .750", and the base-circle dia. is 1.225". The exhaust cams have a slight dwell, but the tip radius of the inlet cams is only 3/32"; no appreciable wear… | ||
| scan0014 | Specification sheet detailing engine lubrication, ignition system, and a comparison table for piston weights and bores. | ||
| View original record | contd :- -4- There are holes .312" dia. and chamfered in the journals, feeding oil to the pins; at the pins the dia. of the oil hole is reduced to .150". There are no grooves in the big ends which are… | ||
| scan0015 | Specifications and analysis of engine components including connecting rods and crankshafts. | ||
| View original record | contd :- -5- Invar struts are used each side to enable a smaller cold clearance to be used. The arrangement of the rings in pairs is of interest; it appears to be a development from having two rings… | ||
| scan0016 | Analysis of crankshaft stiffness and inertia, comparing Carter's formula with torsion test results. | ||
| View original record | contd :- -6- Correcting this figure for the extra lengths of journal, not included in the simple crank of Carter's formula, we get a stiffness per crank of 3.50 X 10^6 lbs.ins/radian. The calculated… | ||
| scan0017 | Technical analysis of crankshaft stiffness, dimensions, and the effect of counterweights on balance and inertia. | ||
| View original record | contd :- -7- We think it could well be stiffer. The displaced volume of the engine is about 250 cu.ins., and comparison with published dimensions of other American cars over the range of 200 - 300… | ||
| scan0018 | Continued report page detailing the function of slipper wheels, including balance weights, damping properties, and materials. | ||
| View original record | contd :- -8- shape is such that for a given degree of out-of-balance they contribute the least amount to the polar inertia of the shaft. As shown in the sketch attached our previous report, at… | ||
| scan0019 | Technical analysis of engine crankshaft smoothness and a comparison of flywheel and clutch inertia values. | ||
| View original record | contd :- -9- since when we removed it we could hardly detect the crankshaft periods, which were a great contrast to the ones on our own engines with no slipper wheels. We do not know definitely why… | ||
| scan0020 | Analysis of clutch components including inertia calculations, materials, and a damped spring drive. | ||
| View original record | contd :- -10- Figures are not available for G.4. and S.S. flywheels, which are somewhat lighter. The clutch has the friction materials attached to the driven member in the form of raybestos rings. The… | ||
| scan0021 | Page detailing the purpose and characteristics of a spring drive, specifications for propeller shafts, and a note on the lighting circuit. | ||
| View original record | contd :- -11- for this purpose. We think the most probable reason for its use is the elimination of transmission rattles, which might otherwise have been transmitted through the flywheel, which is of… | ||
| scan0022 | Continued description of a circuit protection system using relays instead of fuses. | ||
| View original record | contd :- -12- instead of fuses. This consists of two elements each protecting part of the circuit. The relays trip when more than 30 amps. is drawn off, and then emit a buzzing sound, while they limit… | ||
| scan0023 | Experimental 20HP auto friction damper flywheel, potentially for the 'China' chassis. | ||
| View original record | X634 By. from E. SECRET. E2/M22.6.29. Copy to Sg. HS. 20HP. AUTO FRICTION DAMPER FLYWHEEL X5300 X5010 X9200 X634 We send you herewith drawing LeC. 2719. giving particulars of the above. This flywheel… | ||
| scan0024 | Vibration experiments on an 'SS' car, detailing a process of elimination by removing engine parts to identify the source of the issue. | ||
| View original record | To R. from Hs/TSN. c. to SG. c. to Wor. c. to E. c. to Da. c. to EY. 863H. Hs/TSN1/MS22.7.29. ORIGINAL Vibration experiments on SS. We have an "SS" car mounted with two drums driving the back wheels.… | ||
| scan0025 | Series of tests to diagnose engine and chassis vibrations by systematically removing or modifying components. | ||
| View original record | (2) (3) Contd. vibrations was really bad and shook the car. We verified by tests in bottom gear and in neutral that these periods came from the engine and not from the transmission. (4) Cylinder… | ||
| scan0026 | Car vibration testing results and possible explanations related to the engine and chassis. | ||
| View original record | (3) Hs/TSN1/MS22.7.29 (7) Contd. The car still has a lot of distinct periods which we could separate as follows (in 2nd.gear) 21 m.p.h., 28 m.p.h., 36 m.p.h., 41 m.p.h., 45 & 48 m.p.h. (R.P.M.'s were… | ||
| scan0027 | Analysis of crankshaft and crankcase vibrations and proposed experiments. | ||
| View original record | (4) (2) Local vibrations of the shaft in the case, due to the various cranks distorting centrifugally relative to one another, and dragging the bearings with them. (3) "Whirling" of the shaft as a… | ||
| scan0028 | Proposing further engine experiments on a Chrysler in addition to the 'SS' model. | ||
| View original record | (5) Hs/TSN1/MS22.7.39 We consider that the information we have gained so far is worth confirmation and further tests. We are only half way through our experiments, so we cannot expect to know the… | ||
| scan0029 | Standardising the lower inertia slipper wheel on the S.S. car and preparing a crankshaft. | ||
| View original record | To RHC. from Hs/Rm. X634 Hs/Rm.4/MJ. 21.8.29. It is highly probable that we shall shortly standardise the lower inertia slipper wheel on the S.S. car. This is to LEC 2462 and 2526. In view of this… | ||
| scan0030 | Letter to The General Electric Co. Ltd. requesting a supply of carbon granules for a potentiometer experiment. | ||
| View original record | X.634. c. Mailing. EFCL/AD. 4th September, 1929. The General Electric Co.Ltd., 34/35 Moor St., Birmingham. Dear Sirs, Carbon granules for potentiometer. We are anxious to know if you would be able to… | ||
| scan0031 | Quotation for the supply of Carbon Granules from The General Electric Co. Ltd. | ||
| View original record | X634 CONTRACTORS TO H.M. ADMIRALTY, INDIA OFFICE, WAR OFFICE, G.P.O. AND THE LEADING HOME AND OVERSEAS RAILWAYS. REGISTERED TRADE MARK BIRMINGHAM Telephone: Central 7944/51 (8 LINES) Telegraphic… | ||
| scan0032 | Request to obtain granular carbon from the General Electric Co. for a vibration potentiometer. | ||
| View original record | X634. Roy. from EFC. EFC/AD.6.9.29. GRANULAR CARBON FOR VIBRATION POTENTIOMETER. In connection with an electrical method of indicating vibration amplitude, will you please obtain for us from the… | ||
| scan0033 | List of components for a Vibration Amplitude Indicator. | ||
| View original record | X 634. 6.9.29. VIBRATION AMPLITUDE INDICATOR. Components :- Vibration potentiometer of R.R. design and make. Weston type 375. galvanometer, full scale deflection about 600 μa R.R. ignition condenser… | ||
| scan0034 | Request to order an Ever Ready 42-volt high tension unit for an electrical engine vibration indicator. | ||
| View original record | Roy. from EFC. X 634. EFC1/AD27.9.29. ELECTRICAL INDICATOR FOR ENGINE VIBRATION. In connection with the above, will you please order one Ever Ready 42-volt high tension unit type W.561. EFC. | ||
| scan0035 | Potential ignition timing issue with the Low Inertia Spring Drive on the Phantom II. | ||
| View original record | To R. from Hs/Tan. c. Sg. Wor. E. ~~Dr. Ey.~~ LOW INERTIA SPRING DRIVE - PHANTOM II. In connection with the above spring drive, which may be standardised shortly, there is one point which we would… | ||
| scan0036 | Query about the usability of the steering handle for engine timing due to the low inertia spring drive on the 'Phantom II'. | ||
| View original record | X634. PN.3/WT15.10.29. S/W. Hs. From PN. c. to Sg. X.634 X.7060 LOW INERTIA SPRING DRIVE "PHANTOM II" Referring to your Hs/TSN5/AD12.10.29 is it the case that the use of this spring-drive for the… | ||
| scan0037 | Technical memorandum discussing crankshaft periods and torsional vibrations in V-8 and other engine types. | ||
| View original record | To R. From Hs/Tan. C. DS. C. Wcr. Rg. C. E. By. X 634 Hs/Tan5/AML6.10.29. X4499 X634 CRANKSHAFT PERIODS IN THE V-8 ENGINE. From remarks in Rl/M9.10.29, headed "Car Superchargers" we conclude that you… | ||
| scan0038 | Analysis of engine harmonics and crankshaft stiffness, proposing solutions involving reduction gear design. | ||
| View original record | -2- In twin-4 car engines they succeed in keeping this period up by means of the short stiff shafts. In our case a reduction gear is fitted and we find the crankshaft stiffness is reduced thereby to… | ||
| scan0039 | Engine vibration, stiffness, and V-angle design for both aeroplane and car applications. | ||
| View original record | -3- know where to add the stiffness. Alternative (1) would probably increase the weight of the engine a lot. We feel inclined to recommend the second alternative, namely the damped spring drive. If… | ||
| scan0040 | Plan to alter a cylinder angle and consult with Major Carter of R.A.E. on an engine type. | ||
| View original record | -4- of altering the cylinder angle. We shall also get into touch with Major Carter of R.A.E. and get his experience on this engine type. Hs/Dsn. | ||
| scan0041 | The standardisation of the low inertia slipper wheel for the Phantom II. | ||
| View original record | X634 64WJ HS To Hs. from Sg. re Phantom II. Slipper Wheel. Sg11/E5.11.29 Copy to WEP. Referring to our conversation at Derby last week regarding the above, would you please let me know what the actual… | ||
| scan0042 | Standardisation, testing, and implementation of the Phantom Slipper Wheel. | ||
| View original record | X 634. To Sg. from Hs. c. Wor. Hs10/AD7.11.29. PHANTOM SLIPPER WHEEL. Replying to Sg11/5.11.29. The position of the standardisation sheet for the low inertia slipper wheel is that the sheet has been… | ||
| scan0043 | High-speed engine vibration experiments for the Phantom II model. | ||
| View original record | To R. from Hs/Tsn. C. Sg. C. Wor. Da. C. E. Ey. handwritten: not sent out X 634 Hs/Tsn5/AD8.11.29. PHANTOM II HIGH SPEED ENGINE VIBRATION EXPERIMENTS. These tests have been continued under the same… | ||
| scan0044 | Test report on engine roughness and vibration, focusing on the crankshaft and flywheel performance at various speeds. | ||
| View original record | -2- 45 m.p.h. in 2nd. gear, approximately an 80% cure. The former booming periods at 26 and 31 m.p.h. had gone. (3) Crankshaft fitted - Flywheel as before. The engine now begins to get rough over 30… | ||
| scan0045 | Engine crankcase vibration analysis, observing the effects of fitting balance weights. | ||
| View original record | -3- bubbles of air and oil, and could be seen slowly and clearly with the Ashdown Rotoscope. The two blocks were rising and falling on the crankcase at crankshaft frequency (as shown by the… | ||
| scan0046 | Engine vibration tests performed with and without counterweights and flywheel, including a comparison with a Chrysler car. | ||
| View original record | HS/Tsn5/ADS.11.29 contd. -4- (5) Test with and without counterweights repeated. [strikethrough] with no flywheel. [/strikethrough] This time we could detect a reduction in the vibration inside the… | ||
| scan0047 | Motoring and road tests to analyse engine vibration, focusing on the crankshaft and flywheel. | ||
| View original record | -5- suppressed all vibration of the crankcase. As before, however, the difference noticeable inside the car was only slight. We were motoring it in 2nd. gear and the car is becoming a bit worn and… | ||
| scan0048 | Vehicle noise and vibration tests at various speeds and gears before and after clutch modification. | ||
| View original record | hs/Tsn5/ADS.11.29 contd. -6- all periods, noises etc. before and after removing the rear half of the flywheel and clutch parts. It was rather smoother than the average S.S. car; and in its standard… | ||
| scan0049 | 3rd gear performance and a visual observation of flywheel vibration. | ||
| View original record | Hs/Test5/ADS.11.23 contd. -7- 3rd Gear. 32 - 35 period now at approx. 28 m.p.h. 40 - 43 * * 38 m.p.h. 48 - 56 vibration smoother. There was a bad rattling vibration at 60 m.p.h. now instead of 65… | ||
| scan0050 | Engine vibration tests focusing on the crankshaft and slipper drives. | ||
| View original record | Hs/Tsn5/ADS.11.29 contd. -B- We can consider the above tests under two separate headings, crankshaft and flywheel. 1. CRANKSHAFT. Results of tests on this and slipper wheels etc. are briefly :- (1) We… | ||
| scan0051 | Comparison between standard and low inertia crankshaft systems and the effects of engine feet placement on vibration. | ||
| View original record | Hs/TSM5/ADS.11.29 contd. -9- inertia in the nose of the shaft, but only a small percentage reduction of the total inertia of the crankshaft system. We think the most important difference between the… | ||
| scan0052 | The use and effectiveness of balance weights for reducing engine vibration. | ||
| View original record | Hs/Tsn5/A08.11.29 contd. -10- obtrusiveness of the engine, apart from the use of rubber. (3) Balance weights. We have shewn that these are a slight improvement on the Chrysler, and we have the fact… | ||
| scan0053 | Crankshaft design, stiffness, and its impact on high-speed engine vibration and torsional periods for models like the Phantom II. | ||
| View original record | -11- on existing crankshafts, owing to the possibility of being misled. (4) Crankshafts. We cannot yet say that the large pin crankshaft is an improvement in high speed vibration. The shaft is 17%… | ||
| scan0054 | Analysis of crankcase vibration and distortion, with a comparison to a Chrysler engine. | ||
| View original record | Hs/Tsn5/ADS.11.29 contd. -12- the complete crankshaft, great lateral stiffness of the shaft, and in addition possibly some degree of support from the crankcase. We have striking evidence now from the… | ||
| scan0055 | Crankshaft and crankcase vibration, and a résumé of flywheel vibration test results. | ||
| View original record | Hs/Ten/AD8.11.29 contd. -13- vibration of crankshaft and crankcase will be much worse when the rods and pistons are present. It is easy then to understand the efforts of some firms, particularly the… | ||
| scan0056 | Page discussing flywheel vibrations, their characteristics, and potential causes, drawing comparisons with propeller and turbine vibrations. | ||
| View original record | -14- Hs/Tsm5/ADS.11.29..contd. SECTION 2. FLYWHEEL. (Contd). are large amplitude vibrations when the rear half of the flywheel is removed, and these are reduced in amplitude and frequency by refitting… | ||
| scan0057 | Technical discussion on flywheel and crankshaft vibration, proposing experiments to improve smoothness of operation. | ||
| View original record | -15- Hs/Tan5/DB.11.29.contd. a lot of facts in to be sure of our theory. From the above hypothesis we would expect to gain an improvement from either raising or lowering the frequency of vibration of… | ||
| scan0058 | General discussion on engine design features for longevity and smoothness, and the reasons for increasing engine speeds. | ||
| View original record | -16- Hs/Pen5/08.11.29..contd. GENERAL. All our evidence, from theory, from test and from watching closely the changes in other cars,. goes to prove the importance of the following three features to… | ||
| scan0059 | Increasing crankshaft weight versus stiffening the crankcase to improve engine smoothness and durability. | ||
| View original record | -17- Hg/Tun5/D6.11.29...contd. In addition to these, easy change gear boxes may shortly be forced upon us. So far, little has been done in parallel to help bearings and crankcases etc. to withstand… | ||
| scan0060 | Crankshaft design, proposing experiments with heavier, counter-balanced shafts and stiffer crankcases. | ||
| View original record | -18- He/TsmS/AD. 8.11.29. Contd. vibration had added enormously to the life of the bearings. In view of the fact that when reporting on the Chrysler car (already heavier than ours) we considered the… | ||
| scan0061 | Tests to measure distortions in webs. | ||
| View original record | -19- Hs/Tsm5/AD8.11.29.Contd. tests, to try and measure distortions in webs etc. Hs/Tsn. | ||
| scan0062 | Blueprint showing the design and features of a balance-weight crankshaft. | ||
| View original record | "BALANCE - WEIGHT" CRANKSHAFT. FEATURES: 1). JOURNALS 2.3.5.& 6 HAVE 1/2 SIZE BALANCE WEIGHTS INTEGRAL WITH SHAFT. 2). JOURNALS 1. 4. & 7 HAVE FULL SIZE BALANCE WEIGHTS. DETACHABLE. PINS CAN NOW BE… | ||
| scan0063 | The effects of fitting a flywheel to an 'H' engine, specifically regarding supercharger drive slip and gear noise. | ||
| View original record | R. From Hs/VH. c. to Sg. c. to Wor. c. to Rg. c. to E. c. to By. c. to Hs/Er. 4634 X. 4674 X. 4453 X. 634 Hs/VH2/BE12.11.29. FLYWHEEL FITTED TO 'H' ENGINE. A flywheel 3 ft. in diameter, weighing 178… | ||
| scan0064 | Request for various thicknesses of feeler gauge steel for an experimental vibration potentiometer. | ||
| View original record | X634 Roy. from EFC. EFC2/AD21.11.29. X.634. VIBRATION POTENTIOMETER. Will you please obtain for the Experimental Dept. small quantities of feeler gauge steel of thickness .004" .005" and .006". Pieces… | ||
| scan0065 | Technical memorandum detailing test results for the low inertia slipper wheel, focusing on driving and friction loads. | ||
| View original record | To By. From Hs/GWH. c. to E. RIC. Hs/GWH.1/AJ.6.12.29. LOW INERTIA SLIPPER WHEEL E.79915 S.S. X 634 We have carried out numerous tests both on the test bed and on the road to obtain the driving and… | ||
| scan0066 | Standardisation document for a modified design of the friction damper on the crankshaft. | ||
| View original record | RR 755 REVISED (10H) (DF 687 4-1-29) 2M. 2/5943. X634. COMPLETED 17.12.29. STANDARDISATION of CHASSIS PARTS. Date 24.10.29. Description of Parts. MODIFIED DESIGN OF FRICTION DAMPER ON CRANKSHAFT.… | ||
| scan0067 | Costs and implementation of a new part on a K.2 Series chassis. | ||
| View original record | STANDARDISATION of CHASSIS PARTS The number of the first chassis on which the new part will be fitted......... K.2. Series Date when chassis will be handed to test.............................… | ||
| scan0068 | Stress analysis and material recommendations for flywheels on single-cylinder units. | ||
| View original record | X634. To By. From Hs/Tsn. c. to Wor. E. Hs/Tsn.1/MJ.16.12.29. X4499 X634 FLYWHEEL FOR SINGLE-CYLINDER UNITS-E34531. We observe that these have been instructed in cast iron; we have worked out the… | ||
| scan0069 | Flywheel vibrations in the 20 HP car model at different speeds and gears. | ||
| View original record | X634. To R. From Hs/Tsn. C. to Sg. MGT. C. to Rg. K. C. By. HS/Tsn.1/MJ. 20.12.29. X4499 X634 FLYWHEEL VIBRATIONS. We are concentrating on this particular vibration at present, as we find in the case… | ||
| scan0070 | Analysis of engine flywheel vibration and periodic speeds observed during testing. | ||
| View original record | -2- true at low speeds or when turned over by hand. We have observed this on about six engines, in the Test and Expl., Depts., and have measured it on four. The maximum deviation at the periphery in a… | ||
| scan0071 | Flywheel vibration phenomena in various car models and plans for further investigation. | ||
| View original record | -3- Hs/Tsm.1/ML.21.12.29.Contd. they might be expected to affect each other. The same phenomenon of flywheel vibration occurs with less intensity on the Phantom II, and in fact we first noticed it on… | ||
| scan0072 | Causes of and potential cures for flywheel vibrations in car engines. | ||
| View original record | E. ) HS. ) FROM R. DA. ) (At Le Canadel.) x634 R3/M28.12.29. C. to SG. WOR. C. to RG. BY. CAR ENGINES. FLYWHEEL VIBRATIONS. Mr. Tressilian says that one of the vibrations on the above is that of the… | ||
| scan0073 | Test report on a Phantom II low inertia slipper wheel, detailing findings and recommendations from road tests and a stripped-down examination. | ||
| View original record | To Hy. From Hs/GWH. c. to Elt. c. to WOF. x 634 Hs/GWH.1/WJ.3.1.30. 1634 x7020 x4499 PHANTOM II LOW INERTIA SLIPPER WHEEL. We have tested and examined one of the first works produced low inertia… | ||
| scan0074 | Responding to a report on the Phantom II Low Inertia Slipper Drive. | ||
| View original record | Hs/GWH - from SFT. C. Wor (crossed out) C. EY (crossed out) C. Mx. (crossed out) x634 SFT.6/B.4.1.30. x634 x7020 x4499 Phantom II. Low Inertia Slipper Drive. Thanks for your report Hs/GWH/MJ.3.1.30.… | ||
| scan0075 | Lapping paste contamination on spring plates and the subsequent cleaning procedure. | ||
| View original record | -2- Furthermore, with regard to point (a), it is possible that some deposit which you may have thought was scale on the spring plate, is really lapping paste, as we have now found in lapping the plate… | ||
| scan0076 | List of points to observe for the setup and operation of a flywheel vibrations test rig. | ||
| View original record | Hs. x634. Rg/Tsnl/LW.15. 1. 30. FLYWHEEL VIBRATIONS RIG Points which ought to be observed during the rigging up of this are:- (1) Check end play in 20 H.P. crankshaft, which should not be excessive.… | ||
| scan0077 | Programme of preliminary tests for a flywheel to investigate vibrations and performance. | ||
| View original record | - 2 - PROGRAMME OF TESTS We do not wish to recommend an elaborate programme of tests requiring a lot of new tackle until we know more about flywheel vibrations. We wish to do as much as possible with… | ||
| scan0078 | List of proposed tests and modifications to diagnose and rectify engine vibration issues. | ||
| View original record | - 3 - (6) Re-fit rear of flywheel. Remove rear piston & rod. Observe effect on amplitude. This will upset the balance of the engine as a whole and may possibly render it difficult to separate any… | ||
| scan0079 | List of probable future tests for analysing engine vibration, stroke, and torsional periods. | ||
| View original record | - 4 - It may be found early in the course of this programme that certain tests can be discarded or new ones may be thought of. Probable Future Tests Tests which we should like to cover now we have the… | ||
| scan0080 | Quarterly complaints report concerning issues with the 20 HP and Phantom models, specifically the slipper wheel. | ||
| View original record | EXTRACT FROM :- X674 Rn. From Hs. c. to AJL. Hs.1/WJ.27.2.30. QUARTERLY COMPLAINTS OF 20 HP. & PHANTOM. Points which need Experimental attention are as follows :- (1) 20 HP. SLIPPER WHEEL. This… | ||
| scan0081 | Table detailing the torque curve data for a 20 HP engine. | ||
| View original record | EJJ. From Hs/Rn. x634 Hs/Rn.3/MJ.19.3.30. x5771 TORQUE CURVE. 20 HP. ENGINE. ENGINE R.P.M. 500 1000 1500 2000 2500 3000 3500 FLYWHEEL TORQUE LBS.FT. 170 170 165 165 150 135 100 | ||
| scan0082 | Engine vibrations in the Phantom II and 20-HP models. | ||
| View original record | X634. Hs. e. BY. E. Rg. DA. Wor. Sg. EP4/H20.3.30. 20HP. re. PHANTOM II., ENGINE VIBRATIONS. In spite of various improvements we have recently made in regard to the engine and chassis, we still… | ||
| scan0083 | Flaw related to 'boom periods' in limousines fitted with a division. | ||
| View original record | - 2 - EP4/H20.3.30. respect is the limousine fitted with division. Fortunately the feature is worse on the front seats and not so pronounced at the back. In all cases of boom periods we vigourously… | ||
| scan0084 | Test results and specifications for a low inertia 20 HP centrifugally loaded slipper wheel. | ||
| View original record | To E. From Hs/Rn. X634 Hs/Rn.3/MJ.25.3.30. We promised to give you the dimensions of the low inertia 20 HP. centrifugally loaded slipper wheel so that you could modify the design according to results… | ||
| scan0085 | Propeller shaft modifications to address vibrations in the 20/25 HP model. | ||
| View original record | Hs. ) From Da. Ev. ) c. Sg. Wor. X634 Da2/M1.9.30. X.634 X.5340 20/25 HP. VIBRATIONS. With reference to Hs2/MJ8.9.30. R. instructs that we should try an increased diameter propeller shaft, if possible… | ||
| scan0086 | Request to rebuild the flywheel vibrations rig in the Experimental Department's Bumper house. | ||
| View original record | J 634 Mr. Peskett (Millwrights). c. to RHC. Hs.1/MW.5.3.30. Will you please arrange to rebuild the flywheel vibrations rig in the Expl. Dept. Bumper house. R.H.C. is finding a 20 HP. engine and… | ||
| scan0087 | Vibrations at high speeds on the 25 HP model, identifying the cause as the whirling of the propeller shaft. | ||
| View original record | To R. From Hs. c. to Sg. c. to Mor. c. to E. c. to Da. c. to Hy. 25 HP. VIBRATIONS. X. 634. X. 5340. We have proved definitely that one cause of the vibrations we get at high speeds on the 25 HP. is… | ||
| scan0088 | Series of experiments for a flywheel vibrations rig. | ||
| View original record | 4634. Hs. ------- Rg/Tsn1/DM.10.9.30. -------------------- FLYWHEEL VIBRATIONS RIG. ------------------------ The experiments we had in view on this were: (1) Check actual out of truth of flywheel at… | ||
| scan0089 | Page detailing proposed experiments and rig tests to address crankshaft and flywheel vibration issues. | ||
| View original record | -2- (8) To try effect of crankcase stiffness we can run the engine without the last main bearing. However, we shall have to locate the crankshaft endwise on one of the other bearings. Also we shall… | ||
| scan0090 | Page from a report discussing engine balance, crankcases, and detectable movement at high speeds. | ||
| View original record | -3- at high speeds. If there was anything detectable - say more than .015" - it would amount to another argument for balance weights and C.I. crankcases, etc. Also it might be interesting to motor… | ||
| scan0091 | Confidential memo discussing crankshaft vibration on a 25HP engine approaching 70MPH. | ||
| View original record | HS. FROM R. CONFIDENTIAL X634 R3/M1.10.30. Copy to SG. Copy to WOR. Copy to BY. Copy to E. Copy to C. X.634. X.5010. 25H.P. CRANKSHAFT VIBRATION IN APPROACHING 70MPH. Naturally we realise that this is… | ||
| scan0092 | Experiments investigating flywheel vibrations on a 25 HP engine. | ||
| View original record | To R. From Hs/GR. c. to Sg. Wor. c. to Rg. E. c. to Da. By. COPY. X634. Hs/GR.1/MJ.2.10.30. X.634. X.5300. FLYWHEEL VIBRATIONS ON 25 HP. Experiments on 12-G4. shewed that - (1) With Std. flywheel the… | ||
| scan0093 | Flywheel vibration experiments conducted on the 12-G4 engine at various speeds. | ||
| View original record | (1) Experiments on 12-G4 have shewn that flywheel vibration existed at 3100 R.P.M. (43 M.P.H. in 3rd). At 3450 R.P.M. it had entirely vanished, the engine being quite smooth up to 3810 R.P.M. when the… | ||
| scan0094 | Experiments with engine 1V-G8 concerning flywheel modifications to address noise and vibration issues. | ||
| View original record | (2) lag 90° on No.6 crank. Experiments were also carried out on engine 1V-G8 giving an out of truth at right angles to axis = .020"/2 ) At 3100 R.P.M. " " " parallel to axis = .012"/2 ) Arrangements… | ||
| scan0095 | Engine performance, noise, and vibration following modifications to the clutch and flywheel. | ||
| View original record | (3) For Standard clutch less flywheel Mx³= 134 = decrease of 58%. Causing for tightened flywheel to be at 2980 r.p.m. (i.e. more or less unchanged " clutch less " " " 3970 r.p.m. The removal of the… | ||
| scan0096 | Investigation into flywheel vibrations, separate from the crankshaft's torsional period. | ||
| View original record | To [redacted] From Hs. C.c. to [redacted] C.c. to [redacted] x634. Hs.4/AJ.3.10.30. X.634. X.7300. FLYWHEEL VIBRATIONS. There is considerable evidence to shew that the vibration we are investigating… | ||
| scan0097 | To stop work on the 25HP flywheel and clutch, and instructions regarding the design of bonnet louvres. | ||
| View original record | HS. FROM R. X634 R1/M11.10.30. X.634. X.5300. X.7260. Kindly note the following:- (1) The 25HP. flywheel and clutch job should be stopped. (2) The horizontal louvres on the bonnet should be continuous… | ||
| scan0098 | Further experiments on flywheel vibrations for a 25 HP engine. | ||
| View original record | To R. From Hs/GR. c.c. to Sg. Wor. c.c. to E. Da. c.c. to Ev. x634 Hs/GR.1/WJ.20.10.30. y634 xA300 FLYWHEEL VIBRATIONS ON 25 HP. Continuing our report Hs/GRL/WJ.2.10.30. on flywheel vibrations, we… | ||
| scan0099 | Investigations into engine vibrations, focusing on the flywheel, crankshaft, and reciprocating masses. | ||
| View original record | (1) Ha/GX.1/AH.21.10.30.Contd. Having previously found that the flywheel vibrations could be eliminated by a straight through drive from crankshaft to gearbox we tried to remove its constraining… | ||
| scan0100 | Investigating flywheel vibrations through towing tests and component analysis. | ||
| View original record | (2) Hs/SR.1/AU.20.10.30.Contd. To make sure that the flywheel vibrations are not due to proximity of the master torsional period we towed the car with the valve gear missing. The engine was quite… | ||
| scan0101 | Solutions for flywheel vibration on a 25HP engine, including reducing overhang dimensions. | ||
| View original record | HS. FROM R. Copy to SG. " WOR. " BY. X634 R1/M20.10.30. 25HP. FLYWHEEL VIBRATION. X.634. X.5300. We have concluded that this vibration will not vary directly with the overhang, but the energy of the… | ||
| scan0102 | Request for the supply of a replacement crankshaft, solid drive, and steady bearing parts. | ||
| View original record | To RHC. From Hs/GR. Hs/GR.1/WJ.24.10.30. Will you please supply - (1) A plain parallel shaft to replace crankshaft in 1V-G6 and fitted with suitable ends for taking a flywheel and normal spring hub.… | ||
| scan0103 | Requesting to fit a standard flywheel and clutch to chassis 12-G4, retaining the plain parallel shaft. | ||
| View original record | To RHC. From Hs/GR. X634 Hs/GR.1/MJ.31.10.30. X.634. X.5300o Will you please fit standard flywheel and clutch to 12-G4. retaining the plain parallel shaft. Hs/H. Grylls. | ||
| scan0104 | Test on flywheel vibrations and deflection for a 25 HP engine, with a proposal for further tests. | ||
| View original record | x634 To R. From Hs/Rn. c. to SG. Sor. c. to E. Da. c. to Wy. Hs/Rn.3/AJ.31.10.30. FLYWHEEL VIBRATIONS. 25 HP. X. 5300. X. 634. The attached test has been carried out to ascertain the amount of… | ||
| scan0105 | Flywheel deflection test results for a 20 HP engine, including a table of loads and deflection measurements. | ||
| View original record | 20 HP FLYWHEEL DEFLECTION TESTS LOAD APPLIED TO LEVER 3 FT. LONG ATTACHED TO FLYWHEEL BY SPRING CARTRIDGES THE EFFECTIVE WT. OF LEVER = 4 LB. THE CLOCKS WERE SET AT ZERO WITH THE LEVER IN POSITION, &… | ||
| scan0106 | Issues with engine roughness and body 'booming' in the 20 HP and 40/50 models, and a proposed testing scheme. | ||
| View original record | To Wor. From Hs/Rm. c. to E.J.J. x634 Hs/Rm.6/MJ.4.11.30. PHANTOM 11 & 20/25 HP. ENGINE ROUGHNESS, BODY BOOMING ETC. On both the 20 HP. and the 40/50, the engine roughness and body 'booming' stand out… | ||
| scan0107 | Solutions for vibrations in a 25 HP engine, proposing tests on counter-weights and a unified crankcase-block casting. | ||
| View original record | To R. From Hs/Rn. c. to Sg. Wor. c. to E. Da. c. to BY. x634. Hs/Ma.2/MJ.5.11.30. 25 HP. VIBRATIONS. x. 634. x. 5300. The difference between a normal crankshaft and a plain bar is so great that we… | ||
| scan0108 | Experiments investigating the cause of vibrations in a 25 HP engine. | ||
| View original record | To R. From Hs/GR. c.c. to Sg. Wor. c.c. to E. Da. c.c. to Hy. Hs/GR.1/WJ.5.11.30. 25 HP. VIBRATIONS. Continuing our report Hs/GR.1/WJ.20.10.30., we have made the following further experiments- (1)… | ||
| scan0109 | Analysis of engine and flywheel vibrations, diagnosing the cause as crankcase vibration. | ||
| View original record | -2- finished at 3500 R.P.M. At 4200 R.P.M. a very considerable noise was experienced which shook the engine mountings. We therefore consider that the crankshaft is the cause of our "flywheel… | ||
| scan0110 | Page discussing the 'long couples' that exist in a six-cylinder crankshaft. | ||
| View original record | -3- Hs/GR.1/AL.5.11.30. contd. the disturbing factor being the "long couples" that exist in a six cylinder crankshaft. Hs/H. Grylls. | ||
| scan0111 | Test data for flywheel vibrations on a 25 HP engine, showing crank deflection under load. | ||
| View original record | To R. From Hs/An. c. to Sg. Mor. c. to E. Da. c. to Ey. J634 Hs/Rn.2/AJ.6.11.30. x634 x5300 FLYWHEEL VIBRATIONS. 25 HP. With reference to Hs/Rn.3/AJ.31.10.30. Herewith figures taken with the crank at… | ||
| scan0112 | Test data sheet showing crank deflection measurements under different loads. | ||
| View original record | -2- Hs/An.3/H.6.11.30.Contd. NO. 6 CRANK AT T.D.C. LOAD ON LEVER-LB. DEFLECTION INS. Clock A. Clock B. Clock C. Clock D. Zero. Zero. Zero. Zero. Zero. 20 .003 .0045 .005 .0035 40 .006 .0085 .0085 .006… | ||
| scan0113 | Blueprint of a lever mechanism with dimensional measurements. | ||
| View original record | 5.260, 4.910, 3 FT., CL N.6 BRG, A, B, C, D, 6.000", .250", .750", 7.060, 8.060, WLB., DIMENSIONS MEASURED OFF ARRG.T DRG. G.53692., LIMITED, ROOM, 7 NOV 1930, DERBY. | ||
| scan0114 | Experiments to eliminate a 'boom' noise in Phantom II cars at 60 M.P.H. | ||
| View original record | To R. From Hs/IAL. c. to Wor. Sg. c. to E. Ds. c. to By. BOOMS - PHANTOM II. Many Phantom II's have complaints of a 'boom' at 60 M.P.H. (i.e. 2250 R.P.M.) Experiments are being carried out on 24-EX.,… | ||
| scan0115 | Test report detailing modifications to engine mountings, including a Y bracket and rubber feet, to reduce noise and vibration. | ||
| View original record | -2- Hs/TALL/1570.11.30 contd. was a definite alteration in the boom. The boom now was almost cleared on the forward up to 70 m.p.h. (2620 r.p.m.) but was present from this to the maximum speed. On the… | ||
| scan0116 | Test report on diagnosing a 'boom' noise by modifying the exhaust and concluding that vibration is the likely cause. | ||
| View original record | -3- We now thought that having improved the boom a lot by engine mountings, the remainder might be exhaust. Three restriction baffles were fitted between the cylinder head and exhaust manifold. These… | ||
| scan0117 | Tests to eliminate engine vibrations and booms in the 20/25 HP car model. | ||
| View original record | To R. From Hs/AJL. c. to SS. BOT. c. to DA. E. c. to Hy. 20/25 HP. CAR ENGINE VIBRATIONS. we have carried out tests to try to eliminate the engine booms which are apparent on most 20/25 HP. cars. We… | ||
| scan0118 | Report proposing to standardise Cotton 'A' fabrics for torque reaction dampers on 20/25 HP cars. | ||
| View original record | -2- Hs/AL.1/AL.21.11.34.Contd. best load being 8 lbs. measured at the end of the long arm. The effect of soaking in oil is to provide a more constant slipping load. When setting the load on dampers it… | ||
| scan0119 | Blueprint diagram of a torque reaction damper for a 20/25 HP model. | ||
| View original record | TORQUE REACTION DAMPER 20/25HP B DISTANCE PIECE (A) 8lbs LOAD ROLLS-ROYCE, LIMITED PRINT ROOM, 21 NOV 1930 | ||
| scan0120 | Experiments investigating vibrations in a 25 HP engine. | ||
| View original record | To R. From Hs/GR. c.c. to Sg. Wor. c. to E. Ds. c. to Ay. Ns. 634. Hs/GR.1/MJ.21.11.30. X.634. X.5300. 25 HP. VIBRATIONS. Continuing our report Hs/GEL/MJ.5.11.30., we have made the following further… | ||
| scan0121 | Analysis of vibration experiments on a 25 HP engine, focusing on the flywheel, crankcase, and crankshaft. | ||
| View original record | 25 HP. VIBRATIONS. (1) With the car fitted with a bare 2" pin crankshaft, flywheel (no clutch parts) and straight through drive, we found that vibrations started at 2800 R.P.M. getting worse at 3100… | ||
| scan0122 | The measurement of angular distortion in a crankcase bearing housing to assess rigidity and design. | ||
| View original record | -2- To decide whether this deflection was due to the bolts bending, we arranged to measure the angular distortion of the crankcase bearing housing by a clock at Y in the sketch. We then noted that the… | ||
| scan0123 | Blueprint showing designs for a 25 HP No. 6 Bearing and a Flywheel. | ||
| View original record | 25 HP No 6 BEARING FLYWHEEL SECTION AA 10" 6.85" READINGS at J MULTIPLIED UP To 6.85" Rd. ROLLS-ROYCE, LIMITED PRINT ROOM, 21 NOV 1930 DERBY | ||
| scan0124 | Graph plotting deflections for a 25 HP crankcase and flywheel under load. | ||
| View original record | 25 HP CRANKCASE AND FLYWHEEL DEFLECTIONS Left Graph: Y-Axis: 1/10000 RADIANS OR 1''/1000 AT 10'' RAD X-Axis: LOAD AT 39'' RAD, LBS Plot Lines: (Z) BRG. CAP (X) RATIO 1.4 : 1 (Y) C'CASE BRG. HOUSING… | ||
| scan0125 | Car body 'booming' and vibrations from the engine and road. | ||
| View original record | HS. FROM R. X634 R4/M26.11.30. C. to SG. WOR. C. to BY. EP. C. to DA. BOOMING. If there is anything on a car which has a natural period of vibration at all suiting any vibrations derived from the… | ||
| scan0126 | Tests for 25 HP high-speed engine roughness, focusing on the flywheel and bearings. | ||
| View original record | To R. From Hs/Hn. c. to Sg. Hor. c. to F. Ry. c. to Da. Rg. 8634 Hs/Hn.3/AJ.23.11.30. X. 634. 25 HP. HIGH SPEED ENGINE ROUGHNESS. We have now repeated our tests on the flywheel having a tail bearing.… | ||
| scan0127 | Blueprint diagram for a tail bearing for a 25 HP flywheel. | ||
| View original record | TAIL BEARING, 25 H.P. FLYWHEEL WHITE METAL. | ||
| scan0128 | Proposed 'interlaced' 6-throw crankshaft design for 6 and 12-cylinder engines. | ||
| View original record | RG. HS. } FROM R. BY. EFC. } R1/M1.12.30. Copy to SG. WOR. INTERLACED CRANKSHAFTS. X.R610 X.S010. X.634. Some time ago I schemed what we termed the interlaced 6 throw crankshaft. This is not the full… | ||
| scan0129 | Redesign of the 40/50 model's engine suspension to solve a 'booming' issue. | ||
| View original record | To R. From Hs/Rn. c. to Sg. c. to Wor. X634 Hs/Rn.1/MJ.4.12.30. BOOMING 40/50. You will recollect that we have reported a marked improvement in 'booming' on the 40/50 by mounting the engine on single… | ||
| scan0130 | Report comparing boom and vibration issues between vehicles 17-G4 and 12-G4. | ||
| View original record | FOR FILES. A634' Dec.1930. 17-G4 - 12-G4. BOOMS. { 17-G4 in standard condition. { 12-G4 with no torque reaction dampers or bottom rubbers of rear engine feet. On 12-G4 the boom at 50 m.p.h. and the… | ||
| scan0131 | Vibration tests conducted on the 18-G4 (C.7 Unit) with and without torque reaction dampers. | ||
| View original record | FOR FILES. X634 Dec. 1930. VIBRATION ON 18-G4. (C.7 Unit). (1) Torque Reaction Dampers Absent. Top Gear. On the drive there was a booming period at 38 m.p.h., not so noticeable on the overrun. From 54… | ||
| scan0132 | Experiments to reduce vibrations on a 25-HP engine using different flywheels and bearings. | ||
| View original record | ✓634 To R. From Hs/GR. c. to Ss. Nor. c. to Da. E. c. to By. Hs/GR.1/MJ. 8.12.30. X634 VIBRATIONS ON 25-HP. Continuing our report Hs/GR/MJ/21.11.30. we have done two experiments with beneficial… | ||
| scan0133 | Stationary dynamometer tests on a 25 HP model to investigate and separate exhaust boom from engine vibration. | ||
| View original record | 634. To R. From Hs/Rn. c. to Eg. HOR. c. to Da. L. c. to Py. EV. Hs/Rn.4/MJ.8.12.30. BOOMS ON 25 HP. Attached herewith please find report ref: Hs/GR.2/MJ.8.12.30. These tests have been conducted with… | ||
| scan0134 | Investigation into the cause of engine and exhaust booms on a 25 HP engine (Japan Engine 1V-G6). | ||
| View original record | To R. From Hs/GR. c. to GR. Mor. c. to Ds. H. c. to By. EV. Hs/GR.2/MJ.3.12.30. ------------------ BOOMS ON 25 HP. (JAPAN ENGINE 1V-G6). ------------------------------------- We have found that the… | ||
| scan0135 | Analysis of exhaust system configurations and silencers to mitigate engine booms. | ||
| View original record | -2- The effect of temperature on the booms is therefore not due to restraint of expansion of the exhaust system as a whole. Analysing the exhaust system we find that - (1) The combination of an… | ||
| scan0136 | Arranging a visit to Derby to inspect work on engine balancing and mounting. | ||
| View original record | For copy EP Hs/Rm. 8634 PH.3/PH.15.12.30. I propose going to Derby on Wednesday and should be glad to have a car meet me at the Midland Hotel at 9.15 a.m. on Thursday morning. I specially wish to see… | ||
| scan0137 | Postponing the 14-EX demonstration regarding 40/50 Booms until after Christmas. | ||
| View original record | To PN. From Hs/Rm. Y634 Hs/Rm. 3/MJ.15.12.30. 40/50 BOOMS. We are afraid that we shall not have 14-EX. in a good condition for demonstration by Wednesday next, as we had thought possible. We suggest,… | ||
| scan0138 | Engine boom issues in 40/50 & 25 HP models, detailing tests with balanced crankshafts and new engine mountings. | ||
| View original record | X634 To R. From Hs/Rn. c. to SG. Hgr. c. to Da. E. c. to BY. Hs/Rn.S/HJ.16.12.30. ENGINE BOOMS 40/50 & 25 HP. We have been running chassis 24-EX. on the road with a balanced crankshaft and the engine… | ||
| scan0139 | Short memo postponing a visit to the works until after Christmas to discuss another point. | ||
| View original record | 1634. O/N. Wor. copy EP W Hs/Rm. ✓ PN.1/PH.16.12.30. In view of Hs/Rm.3/MJ.15.12.30., I have decided to postpone my next visit to the works until after Xmas when there will be another point which I… | ||
| scan0140 | Experiments on a new engine mounting for the 40/50 & 25 HP models to reduce a 60 mph 'boom'. | ||
| View original record | No 341. To Hs/Rm from Sg. re Engine Booms 40/50 & 25 HP. Sg2/E17.12.30 Referring to Hs/Rm.8/MJ.16.12.30 I am very much interested to note that experiments show that the new engine mounting for the… | ||
| scan0141 | Engine mounting schemes and efforts to eliminate engine boom in 40/50 & 25 HP models. | ||
| View original record | To Sg. From Hs/Rm. 2634 Hs/Rm.1/WW.18.12.30. 40/50 & 25 HP. ENGINE BOOMS. With reference to Sg2/E17.12.30 You are correct in assuming that this engine mounting is the one for which we have only a… | ||
| scan0142 | Fitting car GLN-60 with experimental parts to demonstrate improvements in booming and gain mileage. | ||
| View original record | To C. From Hs/Rm. c. to Py. c. to W or. 1634 Hs/Rm.2/MJ.18.12.30. GLN-60. X. 7960. X. 634. You will recollect that I spoke to you about demonstrating the improvement we have recently made in booming.… | ||
| scan0143 | Requesting a drawing for a new torque reaction damper part for standardisation. | ||
| View original record | To BY. From Hs/AJL. No Sd Hs/AJL.3/MJ.18.12.30. X. 634. X. 5005. TORQUE REACTION DAMPERS. We are starting a standardisation sheet for Cotton 'A' fabric linings on 25 HP. torque reaction dampers (See… | ||
| scan0144 | Engine balancing, crankshaft stiffness, and vibration reduction for 25HP and 45HP engines. | ||
| View original record | E. BY. HS.} FROM R. (At Le Canadel.) X634 R2/M20.12.30. C. to SG. WOR. C. to RG. DA. 25HP. AND 45HP. ENGINES. X.7000 X.634 X.5000 X.7010. X.5010 We have now settled that we must not use cast iron… | ||
| scan0145 | Urgent improvements for the 25HP and 45HP models, focusing on crankshaft balancing, suspension, and clutch design. | ||
| View original record | (2) One feels that in the improvements we are introducing in the 25HP. all the above will be incorporated. For the 45HP. we need to test the present shaft with the 4 system of balance, using… | ||
| scan0146 | Efforts and departmental collaboration to resolve the issue of 'booming' noise in car bodies. | ||
| View original record | To EV. From Hs/Rm. c. to C. c. to EP. c. to PN. BOOMING We have been concentrating our energies on 'booming' for some time past. We were asked to say what we did to 25-H.X. to make it into a good car.… | ||
| scan0147 | Technical memorandum discussing the design and balancing of a 25HP and 45HP crankshaft. | ||
| View original record | E. RG. ) FROM R. BY. HS. ) (At Le Canadel.) X634 R2/M23.12.30. X.5010. X.7010. X.634. Copy to SG. WOR. 25HP. & 45HP. BALANCED CRANKSHAFT We thank RG/TSN. for his work, and blueprint of 18/12/30, and I… | ||
| scan0148 | Engine design focusing on crankshaft balancing, counterweights, and flywheel modifications to achieve smoother performance. | ||
| View original record | (2) I should keep down the angular dimensions of the weight even if it asked for a slightly larger radius. Although it is better for the master period to keep the radius small I should favour a… | ||
| scan0149 | Experiments investigating flywheel vibrations in a 25 HP engine. | ||
| View original record | 1034 To R. From Hs/Gry. c. to Sg. Wor. c. to Da. E. c. to By. Hs/Gry.1/MJ.24.12.30. FLYWHEEL VIBRATIONS 25 HP. We have just carried out some experiments on flywheel vibrations under conditions in… | ||
| scan0150 | Series of five photographs showing the distortion of a rotating object at various speeds. | ||
| View original record | IV G STATIONARY 2500 2600 2800 3200+ | ||
| scan0151 | Photographic series documenting pattern changes at different numerical intervals, possibly RPMs. | ||
| View original record | NOV 1 500 1100 2600 3100 4500 | ||
| scan0152 | Blueprint detailing the optical measurement of flywheel vibrations. | ||
| View original record | OPTICAL MEASUREMENT OF FLYWHEEL VIBRATIONS 10" FOCUS LENS POINT SOURCE OF LIGHT WITH .025" APERTURE MIRROR TO RUN MOST IN TRUTH AT 1000 RPM 54.5" FROM MIRROR 1/100" DEFLECTION ON SCREEN = 0.917 x… | ||
| scan0153 | Problem of 'booming' in finished cars and proposed improvements. | ||
| View original record | x634 Hs/Rm. Ev. C. JLE. Lillie Hall. EP8/H24.12.30. [STAMP: DEC 1930] re. BOOMING. With reference to your Hs/Rm6/MJ.23.12.30. The question of boom periods with our complete finished cars is certainly… | ||
| scan0154 | Solutions for engine vibrations and 'booming' in car bodies for 25HP and 45HP models. | ||
| View original record | HS. E.) FROM R. BY. } (At Le Canadel.) X634 R1/M26.12.30. C. to SG. WOR. C. to PN. DA/EV. CAR WORK - BOOMS IN BODIES. 25HP. & 45HP. X. 7830. X. 5830. X. 634. We now better understand and agree that… | ||
| scan0155 | Delay in the scheme for 40/50 Engine Booms. | ||
| View original record | x634. RECEIVED 31 DEC 1930 To Hs/Rm. from Sg. re 40/50 Engine Booms. Sg15/E31.12.30 Referring to Hs/Rm.1/MJ.18.12.30 I have been in communication with E. on this subject and, whilst appreciating the… | ||
| scan0156 | Measurement of flywheel vibrations on the 40/50 engine using optical apparatus. | ||
| View original record | To R. From Hs/Gry. C.c. to Ss. Wox. C.c. to Da. H. C.c. to Ey. 1634 FLYWHEEL VIBRATIONS ON 40/50. We have now arranged our optical apparatus for measuring flywheel vibrations for the 40/50 engine. The… | ||
| scan0157 | Photographic record of three numbered test samples showing spray or deposit patterns. | ||
| View original record | 2950 2500 2050 SS 15 | ||
| scan0158 | Blueprint diagram illustrating the bending moment on a motion shaft due to flywheel tilt. | ||
| View original record | IF THE FLYWHEEL TILTS AXIALLY TO THE 1ST MOTION SHAFT WILL BEND DUE TO A SAGGING BENDING MOMENT THE END COUPLES BEING PROVIDED BY THE BALL RACES FLYWHEEL 25 HP | ||
| scan0159 | Battery box vibration tests on the Phantom II chassis, comparing cantilever and continuous cross-member supports. | ||
| View original record | To R. From Hs/Gry. c.c. to SC. MOR. c.c. to D. E. c.c. to Ry. x634 Hs/Gry.1/MJ.8.1.31. v634 x7535. BATTERY BOX VIBRATIONS ON P.11. In order to verify that the battery on the 40/50 undergoes more… | ||
| scan0160 | Diagram illustrating the setup for the measurement of battery vibrations using a cantilever and steam indicator. | ||
| View original record | CANTILEVER, Hs 303, Hs 302, STEAM INDICATOR, BATTERY BOX, MEASUREMENT OF BATTERY VIBRATIONS | ||
| scan0161 | Test report showing the movement of a cantilever battery box support at various drum speeds. | ||
| View original record | SHEET I CANTILEVER BATTERY BOX SUPPORT MOVEMENT OF EXTREMITY OF BATTERY BOX SUPPORT RELATIVE TO THE FRAME CROSS MEMBER AT THE REAR OF THE FRAME. THE ACTUAL MOVEMENT SHOWN IS CANTILEVER SUPPORT… | ||
| scan0162 | Series of waveform measurements for a continuous battery box support at various speeds, indicating critical axle speed tramping at 30 MPH. | ||
| View original record | 14.99 SHEET II CONTINUOUS BATTERY BOX SUPPORT MEASUREMENTS AS IN SHEET 1 14.99 M.P.H 18.45 M.P.H 25.83 M.P.H 30 M.P.H CRITICAL AXLE SPEED TRAMPING | ||
| scan0163 | Test report on the torsional period, engine RPM, and speedometer accuracy for the 20-EX model. | ||
| View original record | X634 FOR FILES. 20-EX. 9.1.31. 2.125 Crank Pins. Journals 2.625 82.M.P.H. X.7010. X.634. The master Torsional Period on 20-EX begins at 3760 R.P.M. that is 100.M.P.H. on Top gear. The speedometer has… | ||
| scan0164 | Engine vibrations, a 'boom' issue on the 40/50 engine, and the effects of connecting rod lengths. | ||
| View original record | To R. From Hs/Rn. c. to S&. Wor. c. to Ds. E. c. to BY. 634. ENGINE VIBRATIONS. Tests have been carried out on the 40/50 engine reported in Hs/Gryl/MJ.7.1.31 which convince us that the flywheel is… | ||
| scan0165 | Connecting rod length and engine vibration for the improved 25HP model. | ||
| View original record | R. FROM E. C. to SG. WOR. C. to HS. BY. X634 E1/11.1.31. CONNECTING ROD LENGTH IMPROVED 25HP. X. 5030. X. 634. Referring to HS/RM1/MJ9131., we have always had the impression that the 25HP. manifested… | ||
| scan0166 | Engine rod lengths and related specifications in a table format. | ||
| View original record | (2) The actual rod lenghts are given in the following table : | STROKE | CON. ROD. | ENGINE | RATIO. | |--------|-----------|---------------|--------| | 4.5 | 7.95 | Standard 25. | 1.77 | | 4.5 | 8.45… | ||
| scan0167 | Modifications to engine mounting to improve smoothness and suggesting a redesign of the 'Diamond' mounting. | ||
| View original record | To BY. From Hs/GWH. c. to E. No 34 Hs/GWH.1/MJ.12.1.34. x5005. RE. 16-G4. ENGINE MOUNTING. We obtained the best results for smoothness of engine and freedom from 'booms' by attention to the rear… | ||
| scan0168 | On tests comparing a standard flywheel with a new lightened and strengthened version for a 25 HP model. | ||
| View original record | To R. From Hs/Gry. c. to SS. Wor. c. to Da. E. c. to Ry. 8634 He/Gry.2/MJ.12.1.31. 25 HP. 8634 V53200 Lost Movement in Clutch Pedal Travel. We have carried out tests on a standard flywheel and on the… | ||
| scan0169 | Graph comparing the deflection vs load characteristics of a standard and a lightened 25 HP clutch. | ||
| View original record | LOST MOVEMENT 25 HP CLUTCH ANGULAR MOVEMENT OF CLUTCH OPERATING SHAFT WITH CLUTCH SPRINGS CHOC O' BLOCK STANDARD 25 HP CLUTCH G.33692 LIGHTENED CLUTCH ALUMINIUM BACK PLATE STIFFENED & STIFFER FINGERS… | ||
| scan0170 | 25 HP engine vibrations, specifically the behaviour of a lightened flywheel with different bearing configurations. | ||
| View original record | To R. From Hs/Gry. c. to SS. Wor. c. to Da. E. c. to By. No34 Hs/Gry.1/MJ.13.1.31. 25 HP. VIBRATIONS. We can now report on the behaviour of the W.W. lightened flywheel on LV-G6 unit as recorded by our… | ||
| scan0171 | Study of W.W. Flywheel vibration patterns with and without a tail bearing at various RPMs. | ||
| View original record | IV-G-6 {W.W. FLYWHEEL} WITHOUT TAIL BEARING 2500 3060 3600 WITH TAIL BEARING (BALL RACE) -> 2900 3100 | ||
| scan0172 | Cross-sectional drawing of a mirror holder and tail bearing for a 25 HP flywheel. | ||
| View original record | MIRROR HOLDER AND TAIL BEARING, 25 HP FLYWHEEL, HS 307, 1ST MOTION SHAFT HOUSING, BRONZE BUSH or BALL RACE, MIRROR, HS 304, FLYWHEEL COVER PLATE | ||
| scan0173 | Re-design of the engine mounting for the improved 25HP chassis. | ||
| View original record | HS/GWH. FROM E. Copy to - BY. X634 E3/M13.131 re. ENGINE MOUNTING. X.5005. X.634. Referring to HS/GWH/MU12131., we have just finished re-scheming the part of the engine mounting for the improved 25HP.… | ||
| scan0174 | Test report detailing crank pin dimensions, top torsional period, top speed, and speedometer checks. | ||
| View original record | FOR FILES. X 634 19-EX. 15.1.31. X.7010. X.634. 2.375.dia. crank pins. Top Torsional period 3690 R.P.M. 98.2 M.P.H. Top Gear. Speedometer checked by 2 methods. I.A.Leslie. | ||
| scan0175 | Flywheel vibrations for P.2. and Japan models, exploring potential solutions for crankshaft and bearing configurations. | ||
| View original record | E. HS.) FROM R. BY. ) (At Le Canadel.) C. to SG. WOR. RG. X63H R1/M17.1.31. CAR WORK - P. 2. & JAPAN. FLYWHEEL VIBRATIONS. I am not quite clear that we know if the larger crank-shafts proposed for our… | ||
| scan0176 | The failure of a low inertia slipper wheel during crankshaft critical speed testing. | ||
| View original record | To R. From Hs/Rm. c. to Sg. Wor. c. to Da. E. c. to Rg. By. Y634 Hs/Rm.1/KT.21.1.31. x634 F.IX. LOW INERTIA SLIPPER WHEEL. Whilst carrying out the test to determine the critical speed on the… | ||
| scan0177 | Blueprint showing two views of a P.II. Low Inertia Crankshaft Damper. | ||
| View original record | P.II. LOW INERTIA CRANKSHAFT DAMPER PLATE .075 THICK. X Y A | ||
| scan0178 | Design improvements and simplifications for the Japan Engine, focusing on crankshafts, bearings, and mounting. | ||
| View original record | E. HS. } FROM R. BY. } (At Le Canadel.) X634 R1/M21.1.31. C. to SG. MOR. HY. JAPAN ENGINE. X.5250. C. to RG. RHC. X.634. X.5770. X.5010. If it is necessary for the sake of flywheel vibrations to have… | ||
| scan0179 | Diagram of a starter handle shaft tube location and a telegram from Royce regarding design simplification. | ||
| View original record | (2) RADIATOR. Starter handle shaft passes along this tube. seems better to have tube below transmission line. starter handle shaft is always in P. 2. because of buffers. I have no dimensions, but… | ||
| scan0180 | Vibrations in Phantom II cars and proposed modifications to fix them. | ||
| View original record | 4634. Hs To Hs. from Sg. re P.II Cars Copy to H. WOR. Sg12/E22.1.31 Our most serious complaint is, as you know, the one relating to vibrations from 15 to 25 miles per hour and what I originally… | ||
| scan0181 | Telegram from Royce detailing engine modifications for the Phantom model. | ||
| View original record | 7634. COPY OF TELEGRAM RECEIVED FROM R. AT LE CANADEL. 26.1.31. ORIGINAL 889912. "PHANTOM TRY LIGHTER AND STIFFER FLYWHEEL AS LATEST CHINA LARGE CRANKPINS MUCH LIGHTENED FOUR BALANCE WEIGHTS AS MASTER… | ||
| scan0182 | Design of timing gears and a double rear bearing to address flywheel vibration. | ||
| View original record | R. FROM E. X634 F1/M26.1.31. C. to SG. WOR. C. to HS. BY. JAPAN 3. TIMING GEARS. X.634. X.5010. Please find attached copy of our telegram of even date re. crankshaft pinion at rear end of crank solid… | ||
| scan0183 | Sketches comparing four different designs for a journal and flywheel flange. | ||
| View original record | ① PRESENT CHINA JOURNAL 2.125 2.25 2.6 1.0" ② 2.5 ③ 12 - 5/16" BOLTS FLYWHEEL FLANGE 2.25 2.3 ④ 10 5/16" STUDS OR SET SCREWS 2.3 | ||
| scan0184 | Engine roughness caused by inertia torque and local out-of-balance issues in 6 and 8 cylinder engines. | ||
| View original record | To H. From Hs/Tan. c. to Sg. Gry. c. to Rg. Mor. c. to Ev. E. x634 INERTIA TORQUE. In previous reports we have stated that roughness in a six cylinder engine must be due to inertia torque and that the… | ||
| scan0185 | Experimental double rear crank bearing for test on a 20/25 engine. | ||
| View original record | HS. FROM E. X/634 E1/M27.1.31. C. to SG. C. to R. C. to BY. JAPAN 3. - DOUBLE REAR BEARING. X.634. X.5010. Referring to the last paragraph of memo. E1/M26131. to R., we send you herewith LeC. 2870.… | ||
| scan0186 | Failure of a crankshaft damper disc and proposing design modifications for the low inertia slipper wheel. | ||
| View original record | R. FROM E. X634 E1/M28.1.31. C. to SG. WOR. C. to HS. BY. P. 2. LOW INERTIA SLIPPER WHEEL. We send you herewith the broken crankshaft damper disc mentioned in HS/RM1/KT21131., which memo. states that… | ||
| scan0187 | Summary of a letter discussing engine design schemes, vibrations, and suggestions for future engine development. | ||
| View original record | SG. FROM R. SECRET AND R1/M29.1.31. (At Le Canadel) CONFIDENTIAL C. to Lord Wargrave. X.7770. C. to Mr. Claremont. X.5770. C. to LHS. WOR. E. P. 2. & JAPAN ETC. X.634. C. to HS. BY. RG. DA. The… | ||
| scan0188 | Analysis of engine and crankshaft vibrations, their causes, and potential solutions for various car models. | ||
| View original record | (2) The Japan3. designs did not seem to be shaping well, and other troubles of P. 2. made me think that the directors would like me to return, but I am glad they do not because I can still do a little… | ||
| scan0189 | Engine modifications to address issues with overhanging weight, high revs, bearing loads, and steering troubles. | ||
| View original record | (3) (i) Less overhanging weight, but this is less important than at first appeared (because not pure whirl.) (ii) Less weight remote from the centre of oscillation more important, but takes away our… | ||
| scan0190 | Analysis of a low inertia slipper wheel failure, discussing torsional vibrations, engine testing, and potential solutions. | ||
| View original record | E. HS.) FROM R. BY. ) (At Le Canadel.) Copy to SG. WGR. P. 2. LOW INERTIA SLIPPER WHEEL. X.634. X.7480. X.5770. The breakage of the steel disc I think shews that the crankshaft shortens and lengthens… | ||
| scan0191 | Issues with flywheel vibration in an engine and potential solutions. | ||
| View original record | E. HS. ) FROM R. BY. ) (At Le Canadel.) C. to SG. WOR. RG. C. to HY. RHC. SECRET N634 R3/M3.2.31. JAPAN 3. ENGINE. X.634. X.5770. E's temporary double rear bearing is good for a trial, but I think now… | ||
| scan0192 | Confidential memo discussing the performance of the Bentley 8 litre and its threat to the Phantom II model. | ||
| View original record | Secret and Confidential. X634 To R. from Sg. re. P.II & Japan etc. Sg16/E5. 2.31. Copy to Directors. E. Hy. BY. Rg. Da. X.7770 X.5770. X.634. My dear R., Many thanks for your R1/M29.1.31, copies of… | ||
| scan0193 | Feasibility of producing a 12-cylinder car for the 1931 Show, considering competitor models and existing company commitments. | ||
| View original record | Secret and Confidential. To R. From Sg. Sg16/E5.2.31 - 2- and high speeds. As regards the low speed torque reaction, which they also suffer from, it is encouraging as the result of the experimental… | ||
| scan0194 | Confidential memo discussing the purchase of a competitor's car, gearbox issues, and performance comparisons. | ||
| View original record | Secret and Confidential To R. From Sg. Sg16/E5.2.31. - 3 - On this question of a 12 cylinder the first important step seems to be to buy one and you will have received memos, recommending the purchase… | ||
| scan0195 | Confidential memo from A.F. Sidgreaves regretting Bentley's success and emphasizing the importance of testing competitors' cars. | ||
| View original record | Secret and Confidential To R. From Sg. Sg16/E5.2.31. - 4 - I hope you will realise that no one regrets more than I do that the Bentley people appear to have been successful in achieving such wonderful… | ||
| scan0196 | Technical memo discussing engine flywheel vibrations and potential solutions. | ||
| View original record | E. RG. ) FROM R. HS. BY. ) (At Le Canadel.) Copy to - SG. WOR. HY. Copy to - EP. RHC. X634 RL/M6.2.31. ENGINES GENERALLY X.634. CARS IN PARTICULAR. X.7300. X.5300M P. 2. is the most important at the… | ||
| scan0197 | Engine vibration, balance weights, and potential design improvements by modifying pins and webs. | ||
| View original record | (2) We have from time to time increased the pins and not been altogether satisfied that they have made much improvement - i.e. the added weight has done as much harm as the increased stiffness has… | ||
| scan0198 | Report discussing 12-cylinder engine design, crankshafts, and vibration issues. | ||
| View original record | (3) Now you will see one reason why am I so very keen for a 12 cyl. engine, because as this will always run beyond its master period of 6 per rev. it can have balance weights of any extent that the… | ||
| scan0199 | Vibrations and booming issues in Phantom II and 25 HP models. | ||
| View original record | X634. To R. From Hs. c. to Sg. Wox. c. to E. Da. c. to EY. Hs. 3/AJ.9.2.31. PHANTOM 11 & 25 HP. VIBRATIONS & BOOMS. We feel that we have not given a sufficiently clear description of the vibrations… | ||
| scan0200 | Tests and modifications to address engine and torque reaction vibrations, specifically 'booms'. | ||
| View original record | -2- Hs.S/141.9.2.31.Contd. the test with the Diabolo feet because on a previous test we thought we had gained a definite advantage. We have recently tried the effect of making the rear half of the… | ||
| scan0201 | Technical report on engine vibrations, propeller shaft issues, and flywheel wobble in 20 HP and 25 HP models. | ||
| View original record | -3- mounting which allows the engine to move the dampers will be more effective, but we would need the inertia of the body to help. Torque reaction vibrations synchronise with the explosions. We… | ||
| scan0202 | Mathematical investigations into the benefits of heavy crankshafts and stiff crankcases for the 25 HP engine. | ||
| View original record | X634. To R. From Hs/Gry. c. to Ss. Wor. c. to Da. E. Hs/Gry.1/MJ.11.2.31. 25 HP. CRANKCASE. X.5000; X.634. Replying to your X3/MS.2.31. We have carried out some mathematical investigations into the… | ||
| scan0203 | Photographic study of flywheel vibration patterns at various speeds and configurations. | ||
| View original record | STANDARD FLYWHEEL DOUBLE BEARING A 2700 3000 3400 3550 W.W. FLYWHEEL DOUBLE BEARING B 3100 3400 3600 3700 STANDARD FLYWHEEL UNDER STANDARD CONDITIONS C STATIONARY 2500 2600 THIS IS ALSO MAGNITUDE OF… | ||
| scan0204 | Tests conducted on 25 HP flywheel vibrations. | ||
| View original record | To R. From Hs/Gry. c. to Sg. Wor. c. to E. Da. c. to Hy. 25 HP. FLYWHEEL VIBRATIONS. We have carried out tests on the bed of a flywheel supported by a double bearing. The length of No.7 bearing was as… | ||
| scan0205 | Blueprint showing a cross-section of a 25 HP double flywheel bearing. | ||
| View original record | Ex 5810 SPIGOTTED TO FLYWHEEL HOUSING 2.675 2.800 1.156 25 HP DOUBLE FLYWHEEL BEARING | ||
| scan0206 | Engine vibrations, their potential causes like torsion and gas pressure, and analysis methods. | ||
| View original record | HS. E. FROM R. BY. DA/EV. ) (At Le Canadel.) X634 RI/M16.8.31. C. to SG. WOR. P.2. VIBRATIONS. ENGINE SOURCES & BODY RESONANCE. X.634. X.7830. We are still somewhat in doubt about the causes of some… | ||
| scan0207 | Technical discussion on engine vibrations, mountings, and methods for improving smoothness in 6-cylinder engines. | ||
| View original record | (2) torsional flexibility of mounting with damping. The virtues of flexibility were fairly well known in the earliest days and we added the damping. NOW our P. 2. mounting seems very inefficient for… | ||
| scan0208 | Engine vibrations, including torsional harmonics and flywheel whirl, and potential solutions. | ||
| View original record | (3) During the increase of speed we pass some of the harmonics of the torsional period of the crankshaft. I have not mentioned these as they are so well known and can be so easily demonstrated by… | ||
| scan0209 | Engine vibration issues, causes such as torque reactions and flywheel whirl, and potential solutions. | ||
| View original record | (4) Item (2) is naturally the obvious way to improve this 65 to 70 MPH. vibration by putting up the natural period from 2700 complete vibrations per period, which if it could be raised to 3300 would… | ||
| scan0210 | Improving vehicle performance and smoothness through engine, chassis, and body modifications. | ||
| View original record | (5) and thick rubber top and bottom at the side, no other metal touching, you will get much better results than at present for all torque vibrations, - i.e. torque reaction, over-run and harmonic of… | ||
| scan0211 | Frame rigidity and steering improvements using diagonal steel strips and torque arms. | ||
| View original record | (6) so that they are very rigid indeed in the panels. I have suggested to E. that if the frame is later- ally too flexible for good steering we might use longer steel strips, thus: [Diagram showing a… | ||
| scan0212 | Technical analysis of piston inertia torque and its effect on engine roughness across various engine types. | ||
| View original record | To R. From Hs/Gry. c.c. to Sg. Mor. c.c. to Rs. E. c.c. to Da. Ey. PISTON INERTIA TORQUE. EFFECT OF ENGINE TYPE. We have found graphically the magnitude and frequency of the principal harmonics of… | ||
| scan0213 | Graph comparing piston inertia torque curves for various engine cylinder configurations. | ||
| View original record | PISTON INERTIA TORQUE, Rd. OF COUPLE, Acc., Ω'l, Ω²l, ω²r, ω, α, IO, 25°, 60°, 3000 R.P.M., 1 CYL., TWICE FULL SIZE., 6 CYL., 4 CYL., 12 CYL. 90°, 12 CYL. 45°, 8 CYL. OR, 12 CYL. 60°, 1" = 82 LBS. FT.… | ||
| scan0214 | Experiments to reduce engine vibration and booms by modifying the flywheel. | ||
| View original record | To R. From Hs/Gry. c. to SG. Wor. c. to E. Da. c. to By. FLYWHEELS. Our experiments to reduce engine vibration and booms caused by the flywheel have consisted of three main types - (1) Removal of the… | ||
| scan0215 | Experiments with lightened flywheels and extra bearings to reduce engine roughness and vibrations on various models. | ||
| View original record | -2- Hs/Gry. 2/MJ.17.2.31.Cont. The other light flywheel designed by W.W. (LEC.2830) is a great improvement by raising the period 500 r.p.m. (both on the road and on the test bed). This flywheel has… | ||
| scan0216 | Comparison of inertia torques and crankshaft stiffness between 8-cylinder and 6-cylinder engines. | ||
| View original record | -2- Hs/HTV.1/ML.17.2.31.Cont'd. It should be added that local inertia torques in 8 cyl. engines are high as in the 6 cyl. engine, but 8 cyl. crankshafts are always stiffer than 6 cyl. ones for the… | ||
| scan0217 | Alternative engine mounting scheme to reduce vibrations and booms. | ||
| View original record | J 634. To SG. From Hs. c. to Wor. c. to FN. c. to E. Hs.5/MJ.17.2.31. P.11 VIBRATIONS AND BOOMS. We should like to arrange a demonstration at Bignall's corner for 11 a.m. on Friday morning if this… | ||
| scan0218 | Rescheduling a test concerning Phantom II Vibrations and Booms. | ||
| View original record | x634. Hs RECEIVED To Hs. from Sg. Copy to wor. PN. E. P.II Vibrations and Booms. Sg9/E18.2.31 I am in receipt of Hs.5/MJ.17.2.31 and am very much interested to note all you say on this subject. The… | ||
| scan0219 | Investigations into Phantom car engine vibrations and proposed testing methods. | ||
| View original record | E. HS. FROM R. (At Le Canadel.) C. to SG. WOR. C. to PN. RHC. X634 R1/M20.2.31. X.634. X.7300 X.5300 VIBRATIONS - CAR ENGINE BALANCE WEIGHTS, ETC. So far we cannot come to any satisfactory conclusion… | ||
| scan0220 | Engine design modifications and testing results for prototypes Phantom I and P.2. | ||
| View original record | (2) It should be understood that P. 2. crankchamber, though lighter is stiffer, and therefore as far as I know, would have a higher period than P. 1. There should be no difference in speed of flywheel… | ||
| scan0221 | Telegram discussing engine vibration issues at twelve hundred RPM and proposed modifications to the clutch, flywheel, and balance weight. | ||
| View original record | RR 144A (25 BKS.) (DC 231 4-6-29) BM 6/433 ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. x634 Time Received: 12 O Date: 21-2-31 To: Royce By: GSL from: Lacroy Scroft [Stamp: RECEIVED 21 FEB 1931]… | ||
| scan0222 | Telegram received by telephone discussing a decision on periodicity, torsional vibration, and damper design. | ||
| View original record | ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. RR 144A (25 BKS.) (DC 231 4-6-29) BM 6/433 Time Received.............. Date.............. To.............. By.............. from.............. will not… | ||
| scan0223 | Telegram received by telephone form with a short handwritten message. | ||
| View original record | RR 144A (25 BKS.) (DC 231 4-6-29) BM 6/433 3 4 ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. Time Received Date To By from further consideration before producing experimental sce letter posted… | ||
| scan0224 | Testing and investigation into the cause and potential cures for 'booms and vibrations' on the Phantom II model. | ||
| View original record | To R. From Hs. c. to Sg. Wor. c. to E. Da. c. to By. PN. c. to EP. Mx. PHANTOM II BOOMS & VIBRATIONS. EP. Mx. Rm. and Hs. met Sg. PN. and E. at St. Albans on Friday the 20th. inst. for the purpose of… | ||
| scan0225 | Chassis frame jellying, Diamond engine mounting tests, and faults on left-hand drive cars for the USA market. | ||
| View original record | -2- Hs.2/W.23.2.31. car free from booms. In the case of Mr. Davies we have a customer whom we cannot satisfy, but as we can make no improvement by giving him a new chassis which has been selected the… | ||
| scan0226 | Unresolved issues with left-hand drive cars, including vibrations, shock absorbers, and increased engine compression ratio. | ||
| View original record | -3- Hs.2/W.23.2.31.Cont. We have now left-hand cars completed and off test ready for despatch. It was agreed tha as regards item (1) Booms and Vibrations, we have no known cure to apply to these cars… | ||
| scan0227 | Cable transcript detailing suggestions for a 'Phantom Period' test regarding flywheel vibration and damper design. | ||
| View original record | X634. WorB/T.26.2.31. ----------- We have received the following cable from R. dated 21.2.31. "HIVES SUGGEST GRYLLS CONCENTRATES ON PHANTOM PERIOD AT TWENTYFIVE HUNDRED STOP TEST PLATE SAME… | ||
| scan0228 | From Le Canadel discussing potential improvements to car 18-EX, also known as China 4. | ||
| View original record | HS. FROM R. (At Le Canadel.) X634 RI/M23.2.31. C. to SG. WOR. C. to RG. E. C. to DA. BY. re. CHINA 4. VISIT TO LE CANADEL. 18-EX. ETC. X.8992. X.634. X.H005. I am not expecting to see any drawings… | ||
| scan0229 | Designing a lighter and stiffer flywheel for Phantom experiments. | ||
| View original record | X634 HS. E. ) FROM R. BY. ) (At Le Canadel.) R3/M23.2.31. X.634. X.7300 c. to SG. WOR. LIGHTER & STIFFER FLYWHEEL FOR PHANTOM EXPERIMENTS. MR. Grils says in his memo. that they proposed placing the… | ||
| scan0230 | Car vibrations, crankshaft balance, and flywheel design in response to Mr. Gills' memo. | ||
| View original record | HSJ FROM R. E. (At Le Canadel.) C. to SG. NOR. C. to RG. BY. X634 R3/M25.2.31. CAR VIBRATIONS. CONCERNING MR. GILLS MEMO. To the weight of the crankshaft should be added the weight of all the other… | ||
| scan0231 | Mr. Grylls' findings on 12-cylinder engines at various angles and comparing them to Maybach and Lion engines. | ||
| View original record | HS. E ) FROM R. BY. ) (At Le Canadel.) X634 R2/M26.2.31. Copy to SG. WOR. 12 CYL. CAR. Mr. Grylls has worked hard, and to the point, in adding up the virtues of 12 cyls. at different angles - 45°,… | ||
| scan0232 | New engine mounting design to address vibrations and chassis wobbles. | ||
| View original record | R. FROM DA/EV. X634 DA/EV1/M27.2.31. C. to SG. HS. F. re. VIBRATIONS. 1634 From deductions and tests it appears that what is known as "diamond engine mounting" will isolate the engine vibrations from… | ||
| scan0233 | Diagram illustrating the movement of an engine linkage and mounting system. | ||
| View original record | A CANTILEVER PIN ON FRAME RUBBER. ENGINE FORM THESE MOVE UP & DOWN TOGETHER DUE TO TORSIONAL ENGINE MOVEMENT ABOUT THE CRANKSHAFT A. B THIS SHOWS HOW THE LINKS MOVE DUE TO FRAME TENSION IF BOLT B IS… | ||
| scan0234 | Preliminary scheme for a ball bearing at the back of the flywheel to address vibrations. | ||
| View original record | HS. FROM DA. X634 DA3/M27.2.31. P. 2. FLYWHEEL VIBRATIONS. As suggested by you we send herewith a print of N. sch. 3236., a very preliminary scheme of ball bearing at the back of the flywheel on the… | ||
| scan0235 | Causes and solutions for car body booming and chassis vibrations. | ||
| View original record | HS. E. ) FROM R. BY. DA/EV) (At Le Canadel.) X630 R1/M28.2.31. C. to SG. NOR. C. to PN. EP. P. 2. BOOMING OF BODIES. X.634. X.7830. Expl. Dept. have made strongly points to the impossibility of… | ||
| scan0236 | Chassis and body vibration issues, comparing different body types and suggesting improvements to dampers. | ||
| View original record | (2) is found unless the engine assists in the torsional stiffness - i.e. helps to prevent twisting of the complete frame. I have telegraphed that we ought to get Maybach as a chassis so that we could… | ||
| scan0237 | Tests on a Phantom II model to address a 'boom' noise by trying a stiffer flywheel and crankshaft flange. | ||
| View original record | To R. From Hs/Gry. c. to Sg. Mor. c. to E. Ds. c. to By. x634 Hs/Gry.15/KT.2.3.31. x634 r°300 BOOMS ON P.II. Replying to your R.3/M23.2.31., we are going to try a stiffer flywheel back plate and… | ||
| scan0238 | Blueprint of a Crankshaft Stiff Flange for a 40/50 model. | ||
| View original record | OTHER DIMENSIONS TO E 79788 RECESS FOR BOLT HEAD .750 H=396 3.050 .400 +/- .5 .300 .325 +/- .10 2.400 DIA .275 4.800 +/- .10 DIA 5.150 +/- .10 DIA 4.950 DIA Crs 5.699 DIA C L OF BRG CRANKSHAFT STIFF… | ||
| scan0239 | Blueprint drawing of a stiffened flywheel, part PII, showing a cross-section and detail for a nut recess. | ||
| View original record | Hs 325, .415, .300, 2.450 DIA, 10, 10.000 DIA, RECESS FOR NUT, .650 Rd, FOR OTHER DIMENSIONS, SEE G 77287, STIFFENED FLYWHEEL PII | ||
| scan0240 | Standardisation of cotton 'A' fabric linings for Torque Reaction Dampers on the 20/25 HP. | ||
| View original record | RR 755 (10H) (3-7-30) BM. 6/2571. √634 COMPLETED 3.3.31. STANDARDISATION of CHASSIS PARTS. Date 18.12.30. X No. 634. Drawing No. 5005. Part List Description of Parts. Cotton 'A' Fabric Linings for… | ||
| scan0241 | Costs and logistics for fitting a new part to a chassis. | ||
| View original record | CHASSIS PARTS STANDARDISATION The number of the first chassis on which the new part will be fitted ............ When available. Date when chassis will be handed to test ............ ---- Cost of… | ||
| scan0242 | Causes and prevention of resonant body booming noises in vehicles. | ||
| View original record | To R. from Sg. re P.II. Booming of Bodies. Copy to Wsr. Hs. E. RV. DA/EV. PN. EP. I have read your R1/M28.2.31 with considerable interest because at the present time so very much of our success and… | ||
| scan0243 | Diagnosis of booming and vibration issues by swapping chassis and bodies between different cars. | ||
| View original record | To R. from Sg. The roof certainly was of metal but it was fitted with a patent damping springing device which has been very successful in eliminating booming. W. had this car in their hands and… | ||
| scan0244 | 'boom' or vibration issue in 12-cylinder cars at high speeds, comparing performance unfavourably with competitor Bentley models. | ||
| View original record | To R. from Sg. Sg12/EG.K.31 - X - We are recently faced with another owner who has turned his car back on us because of a boom on the front seats between 53 and 60, there being no boom in the back… | ||
| scan0245 | Diagnosis and potential solutions for engine and body vibrations, known as 'booms'. | ||
| View original record | HS. DA/EV.) FROM R. E. BY. ) (At Le Canadel.) X634 RLM/7.3.31. C. to SG. WOR. PN. EP. P. 2. BOOMS. X.634. X.7830. HS. writes that he has tried my suggestion of replacing the engine with an electro… | ||
| scan0246 | Potential engine and chassis improvements to reduce impulses and noise. | ||
| View original record | (2) I am not saying our chassis is as perfect as it ought to be, but if it were we could not expect to get a good silent car with a body which had an undamped period anywhere near our engine impulses,… | ||
| scan0247 | 'booming of bodies' and requesting details on Bentley coachwork for comparison. | ||
| View original record | SG. } FROM DA/EV. HS. } C. to R. WOR. E. X634 re. BOOMING OF BODIES. DA/EVL/M7.3.31. X.634. X.3805. With a view to correctly understanding the various reports which have been received on booming of… | ||
| scan0248 | To W.J. Iden Esq. requesting his views on a suggestion from the National Omnibus and Transport Co. regarding Chassis No. 119-GN. | ||
| View original record | Hs/Rm. 8634. Hd/WW18/KW11.3.31. U Chassis No. 119-GN. W.J. Iden Esq. We send you herewith copy of a letter dated the 6th inst. which was received from Mr. Morrison, the Engineer to the National… | ||
| scan0249 | Letter from The National Omnibus & Transport Co. Ltd. complaining about a booming noise in a Phantom II chassis. | ||
| View original record | C O P Y. The National Omnibus & Transport Co. Ltd., Engineer's Office, Anchor Works, Chelmsford. 6th March, 1931. Telephone: Chelmsford 31. Telegrams: National, Chelmsford. WJM/RMP. Your Ref:… | ||
| scan0250 | Letter discussing alterations to the exhaust system to eliminate a noise on Chassis 119-GN. | ||
| View original record | -2- Chassis 119-GN. An alteration in thickness of the exhaust pipe and/or the primary expansion chamber would have the effect of shifting the period at which the noise occurs, and so possibly… | ||
| scan0251 | Introducing a thicker crankshaft flange for the Phantom II to address 'booming bodies'. | ||
| View original record | BY/CS. c. Hs. X6341 BY20/G.11.3.31 RECEIVED 12 MAR 1931 PHANTOM 11 - CRANKSHAFT. ------------------------ In a memo dealing with booming bodies (ref. R1/M7.3.31.) R. recommends that we should… | ||
| scan0252 | Investigation into the cause of booms and vibrations in the Phantom II vehicle. | ||
| View original record | To R. From Hs. c. to SE. Wor. c. to E. Da. c. to BY. P.2. BOOMS AND VIBRATIONS. We consider that we have done enough tests now to be able to say definitely that on Phantom 11 the flywheel is not the… | ||
| scan0253 | Investigation into an engine 'boom' noise, testing crankshafts, balance weights, flywheels and engine mountings on Phantom I and II models. | ||
| View original record | -2- and towed the bare crankshaft with balance weights. This made no difference, the boom was still there slightly at the same speed. From other tests we have done it can be said definitely that… | ||
| scan0254 | Suggesting the isolation of the steering box with a rubber slab to reduce engine vibration on model 25-EX. | ||
| View original record | To RIC. From Hs/Rm. x634. Hs/Rm.6/KT.13.3.31. We find that the engine vibrations are transmitted to the body via the steering column. In consequence we wish to isolate the steering box. we suggest… | ||
| scan0255 | Opinions on chassis vibrations, bodywork, and engine mounting for 'booming cars'. | ||
| View original record | HS. SG. } FROM R. E. DA/EV. } (At Le Canadel.) x634 R2/M13.3.31. 13993. +283D. +582V. to WOR. PN. C. EP. BOOMING CARS - P. 2. & 25HP. Your memo. of 6.3.31. to hand. Everyone agrees, and I believe, we… | ||
| scan0256 | Methods to reduce torsional vibrations and booming, focusing on engine mounting and frame design comparisons. | ||
| View original record | (2) ing the frame and the body. It should be realised that the sources of torsional vibrations cannot be reduced by any known means except by increasing the number of cylinders. Bentley and all of us… | ||
| scan0257 | Issues of engine mounting, vibration, and noise in different car models, outlining points for investigation. | ||
| View original record | (3) ingenious engine mounting, which with modifications in design may be useful. My last words are - let me know if chassis or power units vary. Look to the possibilities of body mounting insulation.… | ||
| scan0258 | Telegram discussing a flywheel issue, its cause, and suggested solutions involving a tie bar and weights. | ||
| View original record | H634 B or C Charges to Pay POST OFFICE TELEGRAPHS. Telegrams for INLAND addresses may be handed to the messenger who delivers this form. The Post Office accepts telegrams by telephone. Prefix. Time… | ||
| scan0259 | Cover sheet for information on a diamond mounting and torsionally rigid frame, independent of the engine. | ||
| View original record | B or C Charges to Pay £. s. d. This form, and if possible the envelope, should accompany any enquiry respecting this Telegram. From V10 POST OFFICE TELEGRAPHS. Telegrams for INLAND addresses may be… | ||
| scan0260 | Technical memo discussing the source and potential cures for body booms and vibrations in a vehicle. | ||
| View original record | SG. FROM R. (At Le Canadel.) C. to WOR. C. PN. C. to BY. HS. E. DA. re. P. 2. & BODY BOOMS. Handwritten Note: N634- (1) Mr. Hives memo. re. booms just to hand. he evidently had satisfied himself some… | ||
| scan0261 | Engine vibration, frame weakness, and potential solutions involving engine mounting and body isolation, referencing the 6-litre Bentley. | ||
| View original record | (2) but they evidently are not good enough insulators. Derby would never use thick and soft enough rubber or they might be much better. (11) Bentley certainly had a bad frame in the 6 litre. It was… | ||
| scan0262 | Telegram discussing chassis rigidity and vibration issues, suggesting modifications to the frame. | ||
| View original record | To Sg. From Hs. c. to Wor. c. to E. Da. c. to By. V634 Hs.5/MJ.16.3.31. We have received the following telegram from R. dated 14.3.31. :- "HIVES THANKS FOR REPORT RULING FLYWHEEL OUT SEE LETTER SENT… | ||
| scan0263 | Typed copy of a telegram regarding experiments on flywheel improvements and different engine mounting systems. | ||
| View original record | To Sgr. B. Hs. BX. By. Won. X034. Wor6/T.16.3.31. We give below copy of telegram received from R. to-day at 1.7 p.m. "MESSRS WORMALD AND HIVES FIT FLYWHEEL IMPROVEMENTS TO ALL EXPERIMENTS BECAUSE WE… | ||
| scan0264 | Modifications for a car, referencing issues found on a similar model, and deciding on communication strategy. | ||
| View original record | HS 8634. To Wor. from Sg. Copy to E. Hs. Sg4/E18.3.31 Re telegram from R. as given in Wor6/T.16.3.31, up to the present time I have not seen any reply to this and should be glad to know what action is… | ||
| scan0265 | Testing and troubleshooting booming and air pressure issues in an exhibition car body on chassis No. 147-GY. | ||
| View original record | Mr. Davis. Exhibition body by Thrupp & Maberly on the second Chassis No.147-GY. There are sundry interesting points arising out of the work now finished in connection with this case. I use the word… | ||
| scan0266 | Investigation of 'boom periods' on a Phantom II for Mr. Davis by swapping car bodies. | ||
| View original record | 16.3.31. W/G C. Pat. Hs. Ho. RP4/1118.3.31. [STAMP] RECEIVED 20 MAR 1931 re. PHANTOM II. BOOM PERIODS. MR. DAVIS. With reference to your PH2/ST18.3.31. we understand that the body which was originally… | ||
| scan0267 | Engine mounting and frame design to mitigate torque vibrations, with comparisons to Bentley and Hispano. | ||
| View original record | HS. E. ) FROM R. BY. DA/EV.) (At Le Canadel.) X684. Copy to - SG. WOR. P. 2. ENGINE MOUNTING. R1/M18.3.31. X.684. X.7005. X.7830. HS% will tell us if it is true that R.R., Bentley, and Hispano - i.e.… | ||
| scan0268 | Engine mounting, frame rigidity, vibration issues, and cylinder configurations. | ||
| View original record | (2) at anything sufficiantly practical. Mr Evernden has sent us an idea for an engine mounting that should be equal to the diamond mounting but can be made to help the torsional rigidity of the frame.… | ||
| scan0269 | Experimental tests to fix the 'Phantom booms' complaint by modifying engine and body mountings. | ||
| View original record | Mervin Jones x634. Alry. 19.3.31. Royce, Les Mimosas, Le Canadel, Par-le-Lavandou, (VAR) FRANCE. Phantom booms. Experimental tests show we can overcome complaint by removing rear engine feet and… | ||
| scan0270 | Telegram detailing experimental tests to resolve a 'Phantom Booms' complaint. | ||
| View original record | 8634 To Sg. Wor. From Hs. E. Da. By. Hs.1/MJ.19.3.31. We have despatched the following telegram to R. at Le Canadel :- "PHANTOM BOOMS. EXPERIMENTAL TESTS SHOW WE CAN OVERCOME COMPLAINT BY REMOVING… | ||
| scan0271 | Phantom II, explaining why a new body is not being fitted to a secondhand chassis and that a new chassis is being supplied to Thrupps. | ||
| View original record | X6341. S/W....HP ->c. to Hs. C7/C20.3.31 Re Phantom II Boom Periods - Mr. Davies. EP4/H18.3.31 We are not fitting the new body off 147-GY to 100-GY because the chassis is secondhand. We are supplying… | ||
| scan0272 | Experimental results to reduce engine booming in Phantom II & 25 HP cars, focusing on engine modifications and the 'Diamond' engine mounting. | ||
| View original record | To R. From Hs/Rm. c. to SG. Wor. c. to K. Da. c. to Hy. BOOMING CARS P.II & 25 HP. Before answering the questions in R.2/H.13.3.31. we should like to tabulate some of the results we have so far… | ||
| scan0273 | Engine mounting experiments and issues for various models, including the 25 HP, 40/50, and P.II. | ||
| View original record | - 2 - really very free from this complaint. Therefore experimentally we say there is no reason why booming 25 HP. cars should exist. Unfortunately the design of the rear support on 18.G.IV was such… | ||
| scan0274 | Analysis of vibration, steering shocks, and booming issues, comparing Phantom I and Phantom II models. | ||
| View original record | - 3 - of these combinations. (b) Though vibration in the front seats is reduced when the central rear engine support is mounted on rubber, booms are not affected. We have confirmed this result some… | ||
| scan0275 | Analysis of chassis boom issues related to different body types and mounting conditions. | ||
| View original record | - 4 - chassis. However, as the following results show, it would be quite possible to change a body from one chassis to another and unconsciously alter the conditions of mounting so that the boom was… | ||
| scan0276 | Chassis variations, flywheel whirling, and engine booms on various models. | ||
| View original record | - 5 - Hs/Rm.3/AT.21.3.31.cont. (3) We do not believe Hispanos are any better than we are from what Coachbuilders say. We cannot judge Bentleys on one car and are trying to obtain further information.… | ||
| scan0277 | Results of various experimental tests on the power unit, engine mountings, and chassis features to resolve issues like 'booms' and vibrations. | ||
| View original record | Experimental Tests Carried Out. Power Unit. (1) Various dia. Crankshafts. (2) Various crank dampers. (3) Balance weights. (4) Front flywheel plate only. (5) Complete flywheel with aluminium rear half.… | ||
| scan0278 | Page 2 of a report detailing investigations into vehicle 'boom' and vibration issues. | ||
| View original record | - 2 - (2) Steering column isolated. With the rear engine feet removed this has sometimes a marked effect. (3) Frame side members damped by jacks at different points, also by lead weights. No… | ||
| scan0279 | Cure for a booming sound in cars by isolating the dash and steering column using rubber mounts. | ||
| View original record | TO HS. FROM EV. COPY TO R. SG. E. DA. X634 V2/23.3.31. RE BOOMING CARS. We understand you to say that the isolation of the dash and column from the frame effects a cure of the booming experienced at… | ||
| scan0280 | Arrangements to fix booming and drumming troubles in demonstration cars. | ||
| View original record | 86341. PN.5/WT23.3.31. [illegible]..from PN. Copy to Sg. Hs. Hs. is most anxious to have available at W. as soon as possible any of the Company's cars in which booming troubles, front or back, or both… | ||
| scan0281 | Arranging for a Phantom II car (112-GN) to be sent for urgent repairs to address booming and drumming noises. | ||
| View original record | X634. RECEIVED 21 MAR 1931 S/W. Hs...from PN. Copy to LHS. RG. I have/been able to arrange with LHS. that his "Phantom II" Car (112-GN) shall come up to you to-morrow with a view to booming remedies.… | ||
| scan0282 | Resolving body boom issues and a customer complaint on a Phantom II. | ||
| View original record | Hs. e. Wer. e. Mx. 8634. EP10/H25.3.31. re. PHANTOM II. BOOM PERIODS. With reference to Mr. Davies' Car, No.147-GY. the following is a report on the re-delivery of the above car to Mr. Davies, after… | ||
| scan0283 | Proposed arrangement for isolating a silencer from a troublesome chassis. | ||
| View original record | - 2 - particularly troublesome chassis in the future, perhaps you would like to try this arrangement and therefore I give it to you for what it is worth although possibly you have already experimented… | ||
| scan0284 | Technical analysis of the causes and mechanics of 'booming' vibrations in cars. | ||
| View original record | TO HS. FROM EV. EVI/25.3.31. copy to R. SG. E. BOOMING CARS. P.2. X.634 X.7830 We have so far not assisted in your work on booming, but have received your report on the tests which have been carried… | ||
| scan0285 | Proposal for using the car's scuttle and dash as a horn amplifier, based on the principles of diaphragm speakers. | ||
| View original record | (2) the pot of the dash has to diaparam. In this way we suggest that the column and dash between them form a very good amplifier working on the principle used in diaparam amplifiers for wireless… | ||
| scan0286 | Analysis of resonant vibrations and booming noises in vehicle bodies, comparing Phantom I and Phantom II chassis. | ||
| View original record | (3) (2) Then the body is lowered and rigidly mounted to the chassis without the subframe mounting. If the boom returned it would prove that direct transmission between the body and the frame had… | ||
| scan0287 | Analysis of frame rigidity and the causes of resonant booming in car bodies, focusing on roof construction and passenger cabin shape. | ||
| View original record | (4) the dash and on P.2. it is 20 ins. There would be more pumping of the column at its fixing on the dash on P.2. (see Fig.1.) The frame of P.1. [text crossed out] has less torsional rigidity in… | ||
| scan0288 | Clarifying the author's non-involvement in the investigation into 'Booming Cars' on the P.2. & 20/25HP models. | ||
| View original record | X634 R. FROM DA/EV. DA/EV1/M25.3.31. C. to SG. WOR. BOOMING CARS. A.634. C. to E. HS. P.2. & 20/25HP. X.7830. X.5830. From your memos. on the above subject, and especially R2/M13.3.31., I presume that… | ||
| scan0289 | Experiments with engine mounts, flywheel balancing, and frame stiffness to reduce engine vibration and body booms. | ||
| View original record | HS. FROM R. (At Le Canadel.) C. to SG. WOR. C. to PN. BY. E. P.2. BODY BOOMS. X.634. X.7005. X.7830. We have removed the rear feet and the vibrations of the engine do not now affect the body so much.… | ||
| scan0290 | Recommendation on curing engine trouble by addressing vibrations at the source and using thicker rubber mountings. | ||
| View original record | - 2 - harmonics or octaves of the torsional vibration of the crankshaft or whirling of the flywheel. I feel sure much can be done to cure the trouble at source, then compromise engine mounting -… | ||
| scan0291 | Telegram discussing body vibrations, bonnet knocking, and proposed engine improvements for a twelve-cylinder model. | ||
| View original record | 8634 To Sg. Wor. E. Da. By. Hy. Hs.1/WJ.26.3.31. We have received the following telegram from R. dated 25.3.31. :- "HIVES ELLIOT HAS REMOVED REAR FEET BODY VIBRATIONS BETTER BUT FRAME MOVEMENTS GREAT… | ||
| scan0292 | 'booming complaint' on car 147-GY for a Mr. Davies. | ||
| View original record | Hs. Mx. c.c. Wor. 8634. EP5/H28.3.31. re. 147-GY. Davies. Booming Complaint. RECEIVED 30 MAR 1931 With further reference to our EP10/H25.3.31. in order to complete the records of this case, I am now… | ||
| scan0293 | Customer satisfaction test drive and feedback for Chassis No. 147-GY. | ||
| View original record | COPY. H. from Bt. Btl1/GD18.3.31. J.W.Davies Esq., Chassis No. 147-GY. As instructed, I went with Mr. Davies's car and JLE. to take this owner out and endeavour to obtain an expression of satisfaction… | ||
| scan0294 | The second page of a typed document discussing collaborative work on a job. | ||
| View original record | - 2 - we each feel that we were enormously helped in this case by not having to tackle the job along. Bt. | ||
| scan0295 | Investigation into 'body boom' issues on Phantom II car 27-EX, involving a new crankshaft and balance weights. | ||
| View original record | X634 To R. From Hs. c. to Sg. Wor. c. to PM. By. c. to E. PHANTOM II BODY BOOMS. We have 27-EX. car running fitted with a new crankshaft with stiffer flange, flywheel with stiffened flange, and the… | ||
| scan0296 | Investigation into 'body booms' and the results of removing rear engine feet as a solution. | ||
| View original record | To Sg. From Hs. c. to Wor. PN. c. to E. BY. X634 Hs.10/MJ.31.3.31. X.634 X700- X600- P.2. BODY BOOMS. You will see by R.4/M25.3.31. that R. consideres removing the rear engine feet from 18-EX. car at… | ||
| scan0297 | From Hives to Royce reporting issues with a flywheel, balance weights, and an epicyclic gearbox. | ||
| View original record | 8634. 31.3.31. Royce. Villa Mimosa, Le Canadel, Par le Lavandou, (VAR) FRANCE. STIFFER FLYWHEEL AND CRANKSHAFT FLANGE HAS NO EFFECT ON BOOMS ALSO FOUR BALANCE weights DOES NOT HELP. WE ARE HAVING… | ||
| scan0298 | Copy of a letter discussing P.2 engine vibrations, periods, and mounting. | ||
| View original record | COPY OF LETTER RECEIVED FROM R. 8634 Le Canadel. 31.3.31. x3993 P.2 VIBRATIONS. Thank Hs/Rm. for his very complete report of the work done on the above. I am not, however, quite in agreement with the… | ||
| scan0299 | Engine mounting strategies, frame stiffness, and the prevention of torsional twisting. | ||
| View original record | -2- four point Diamond mounting - with this I do not agree. I can now see that modern motorcars to have a frame rigid enough (torsionally) we are forced to use the engine crankcase to prevent the… | ||
| scan0300 | Chassis vibrations, competition from Hispano and Bentley, and brand pricing strategy. | ||
| View original record | -3- to end of the power unit, naturally we cannot do this without feeling the torsional vibrations of the engine. I cannot write more at the moment but my mind is quite clear that if you want… | ||
| scan0301 | Telegram received by telephone discussing engine vibration, pinion issues and the need for brake control. | ||
| View original record | RR 144A (25 BKS.) (DC 231 4-6-29) BM 6/493 MD 1 APR 1931 8634. ROLLS-ROYCE LTD. JH / X523 RECEIVED 5 APR 1931 TELEGRAM RECEIVED BY TELEPHONE. Time Received: 5-37 Date: 1.4.31 To: Raycar By: JCS from:… | ||
| scan0302 | Copy of a telegram concerning engine high-speed vibration and crankshaft torsional harmonics. | ||
| View original record | 8634. COPY OF TELEGRAM RECEIVED FROM R. AT LE CANADEL :- ROYCE CHICHESTER ANGLETERRE. 1.4.31. "ELLIOT CONCLUDE FROM HIVES TELEGRAM ENGINE PERFECT AS POSSIBLE FOR TYPE IF SO CANNOT UNDERSTAND PERIODS… | ||
| scan0303 | Proposed palliative measures to address excessive 'jellying' and road shocks in cars. | ||
| View original record | X634 To R. From Ha/Rn. c. to SE. Hor. c. to E. Da. c. to Py. Pn. Hg/Rn.T/KT. 2.4.31. x634 x457 BODY BOOMS P.II. With reference to R4/M25.3.31. (1) Proposed Palliative Measures. We note that on 18-MX… | ||
| scan0304 | Analysis of chassis booming and torque reaction, with proposals for future solutions including diamond engine mounting. | ||
| View original record | (2) Hs/Rm.7/RT.2.4.31.CONT. pressures, these two features may accentuate the jellying produced by removing the rear feet. 129.GN. One of the Sales cars that we treated for booming, 129.GN. was as bad… | ||
| scan0305 | Experiments with front rubber engine mounts and frame stiffness to reduce chassis 'jellying'. | ||
| View original record | (3) (b) with front rubber mounted engine feet to assist. That this can be accomplished we believe because at the Berlin Show we noticed that the Maybach was almost entirely free from jellying of any… | ||
| scan0306 | Engine mounting, frame stiffness, and body booms to reduce vibrations. | ||
| View original record | HS. E.) FROM R. DA. ) (At Le Canadel.) R1/M8.4.31. X.634 X.7830 X.7005 C. to SG. LHS. WOR. P. 2. BODY BOOMS. C. to PN. C. CX. EP. It is now agreed that as regards body booms there is nothing we can do… | ||
| scan0307 | Chassis stiffness, engine mounting, and suspension improvements, with comparisons to Bentley. | ||
| View original record | (2) Bentley is now, I firmly believe, trusting to the body to help the stiffness and using our old 3 point mounting (P. 1. scheme.) I have for some time thought that without the assistance of the… | ||
| scan0308 | Potential engine and chassis improvements to resolve issues with high speeds and body booms. | ||
| View original record | (3) You will remember that I took up the position that our 6 cyl. P. 1. & P. 2. engine could be made better so that we could reduce the trouble at the source and after suggesting working at every… | ||
| scan0309 | Development of a new 6-cylinder car (J.3), the need for improved torsional chassis stiffness, and competition from Bentley. | ||
| View original record | E. DA. } FROM R. HS. } (At Le Canadel.) 1634. R1/M9.4.31. X. 5770 X. 634. Copy to sG. wOR. ENGINE WORK - CARS DRIFT WILL NOT DO. We must make J. 3. 6 cyl. because we have the big car 6 cyl. I expect… | ||
| scan0310 | Engine development priorities, chassis issues, and competition from Bentley. | ||
| View original record | -2- Really I cannot see that it is worth while to make new tools and patterns for an engine that we cannot expect to be entirely satisfactory, and we ought to spend our whole time pushing on with our… | ||
| scan0311 | Methods for improving chassis rigidity to reduce vibration and shimmy. | ||
| View original record | To R. From E. Copy to SG. Wor. Hs. By. Da. X634 E1/T9.4.31. ----------------- FUSS, ROAR, BOOM AND SHIMMY. ----------------- Assuming that no one would wish to use the engine for stiffening the frame,… | ||
| scan0312 | Analysis of an unbearable booming noise in a 25 HP car, focusing on body and chassis issues. | ||
| View original record | To PN. From Hs/Rm. C.to Sg. Wor. c. to Da. E. γ 634 Hs/Rm.8/MJ.10.4.31. GNS-2. X.634. X.7960. This 25 HP. car was sent up to us to deal with booms. We consider that the body on this car is worth the… | ||
| scan0313 | On car engine vibrations and 'booming', particularly in the P.2. model, detailing diagnostic telegrams and proposed solutions. | ||
| View original record | E. HS. FROM R. BY. (At Le Canadel.) 8634 R1/M12.4.31. C. to SG. WOR. RG. CAR ENGINES - PRINCIPALLY P. 2. AND BOOMING. Since my last memo. on the above I have returned to my earlier impression that the… | ||
| scan0314 | Analysis of engine vibration issues with proposed modifications to the crankshaft, flywheel, and bearings. | ||
| View original record | (2) ment or the damper cannot damp but it is possible that the movement is excessive - i.e. it is letting the shaft vibrate torsionally over a great range. One would not expect much benefit from… | ||
| scan0315 | Engine performance at 45 MPH, specifically piston inertia, crankshaft torsion, and flywheel support, along with modifications to a 6-cylinder engine. | ||
| View original record | (3) His remark of the good period of 45 MPH. is correct and goes yo prove that although piston inertia is great at this speed it struck no period of flexibility of either crankshaft torsion or… | ||
| scan0316 | Urgent instructions for collecting Lord Allendale's car (110-GY) to investigate and rectify an oil leak, roar, and vibration issues. | ||
| View original record | [Handwritten top left: H/S with a line through it] [Handwritten top right: 8634] URGENT. S/W (Hd) from H. [Handwritten: copy to Hs] H5/H13.4.31. 110-GY. - Lord Allendale. -------------------------… | ||
| scan0317 | Letter concerning adjustments and repairs for Lord Allendale's Phantom II vehicle. | ||
| View original record | C/O Lord Allendale, Bywell Hall, Stocksfield on Tyne. Apr. 11th 1931. Sir, I called on you at Conduit Street on Wednesday last with reference to an inspection of Lord Allendale's Phantom II. Since… | ||
| scan0318 | Dissatisfaction with a 6-cylinder engine, focusing on crankshaft torsional vibrations and damper design. | ||
| View original record | E. BY. HS. ) FROM R. (At Le Canadel.) X634 R3/M14.4.31. C. to SG. WOR. C. to RG. LHS. PN. Mr. Claremont. CAR ENGINE. I am now almost certain that our dissatisfaction with the 6 cyl. engine is due to… | ||
| scan0319 | Vibration damping, proposing a centrifugally loaded damper design with an accompanying sketch. | ||
| View original record | -2- surfaces the friction may fall to very little. I still have no report that would lead us to think the damper is not doing its duty of preventing the deflection becoming an oscillation but I… | ||
| scan0320 | Future and the development of a 6-cylinder engine. | ||
| View original record | -3- I will write again about our future. It will so much depend on what we can do to make a 6 cyl. nearly perfect as we are. If not we must try something more desperate. R. | ||
| scan0321 | Customer complaints about 'booms' and a proposed modification to the rear engine feet and column support. | ||
| View original record | To R. From Hs/Rm. c. to Sg. Hor. c. to E. Da. c. to Hy. X634 Hs/Rm.2/KT.18.4.31. X.634. X.7005. We have about ½ doz. customers who have complained bitterly about booms, that we must do something at… | ||
| scan0322 | Investigation into a 'booming' noise complaint on Phantom II chassis. | ||
| View original record | To R. From Hs. c. to SS. Mor. c. to R. Da. c. to By. PHANTOM II BOOMS. We do not know whether we have made it clear that on the production tests of Phantom II cars there is no distinct boom, although… | ||
| scan0323 | Investigation into the cause of a 'boom' noise at 2200 r.p.m. in Phantom II cars. | ||
| View original record | To R. From Hs/Gry. c. to SG. NOR. c. to E. DA. c. to Sy. _86 3/4_ Hs/Gry.1/KT.18.4.31. P.II BOOMS. We do not yet know why Phantom II cars boom at 2200 r.p.m. whereas no boom existed in Phantom I's. We… | ||
| scan0324 | Investigation into the cause and potential cure of a 'boom' or vibration found on Phantom II cars. | ||
| View original record | - 2 - Hs/Gry.1/KT.18.4.31.c. sets is 6600/minute. This frequency therefore appears to be a resonance frequency of Phantom II cars. While running at this speed on tran sets we held a microphone against… | ||
| scan0325 | Road test report detailing vehicle noises, vibrations, and carburation performance. | ||
| View original record | Copy for files. X634 X.5840. X.634. Re. 18.G.IV. TEST. 20.4.31. On the test this morning of the above, I could not detect any outstanding boom, or period. The only period that I could find was rather… | ||
| scan0326 | Standardisation sheet for the removal of rear engine feet on the Phantom II model to fix a booming issue. | ||
| View original record | To Sg. From Hs. c. to Wor. Hd. X634. Hs.4/MJ.21.4.31. BOOMING PHANTOM 11. X.634. X.7005. We have circulated a standardisation sheet for the removal of the rear engine feet. As far as we are concerned… | ||
| scan0327 | Persistent booming complaint from Lord Allendale regarding car 110-GY. | ||
| View original record | To H. From Hs/Rm. c. to Hd. 8634. Hs/Rm.7/KT.21.4.31. 110-GY. LORD ALLENDALE. The complaint of booming on this car is only in the front seats. we have had the car in the Expl. Dept and tried on it… | ||
| scan0328 | Investigation into the cause of chassis vibrations, analysing impulses, torque reactions and crankshaft deflection at various speeds. | ||
| View original record | X634 Hs. E. ) FROM R. Da. Ev. ) (At Le Canadel) R2/M21.4.31. P.2. VIBRATIONS. X.634 X.7010. There is a strange agreement between these speeds which suggests that all the vibrations complained of in… | ||
| scan0329 | Potential chassis modifications to alter periodicity. | ||
| View original record | -2- R2/M21.4.31 contd. We might also build a chassis with entirely different side members. The same depth heavy might not alter the periodicity, but deeper ones should. Weight and tie-rods might say… | ||
| scan0330 | Transcribing a telegram about a conference on torsional periods and a request to borrow a car. | ||
| View original record | 834. To Wor. From Hs. c. to Sg. c. to BY. c. to PN. Hs.5/MJ.24.4.31. X7960. E. dictated the following telegram over the 'phone, which he had received from R. :- "ARRANGE CONFERENCE W.W. THURSDAY… | ||
| scan0331 | Cause of 'boomers' in Phantom II models, related to sub-frame versus direct-on-frame construction. | ||
| View original record | X634 To Hs. from Sg. re P.II. Booms. sg11/E27.4.31. 17380 X634- In a letter I have received from R. he says: "It has occurred to me that we cannot take the rear feet away from a sub-frame car because… | ||
| scan0332 | Torsional period testing on a 25HP engine with 12 balance weights. | ||
| View original record | Copy for files. 8634. X.634. X.5010. TORSIONAL PERIODS ON 25HP. WITH 12 BALANCE WTS. -------------------------------------------- We have run the cast iron unit C.9 in 18.G.IV. with no damping in the… | ||
| scan0333 | Test report on a 25 HP engine's double rear crankshaft flywheel bearing. | ||
| View original record | Copy for Files. 25 HP. FLYWHEEL DOUBLE BEARING. We have now tested the double rear crankshaft bearing on IV.G.6 Japan unit in 12.G.IV. chassis. This bearing definitely eliminates the flywheel period… | ||
| scan0334 | Request to change from a 12 to an 8 balance weight scheme on a large pin 25 HP crankshaft. | ||
| View original record | X634. By. from Hs/Rm. Hs/RM1/AD4.5.31. X5010. X634. During our recent visit to West Wittering R. asked us to arrange for his eight balance weight scheme to be fitted on to the large pin 25 HP.… | ||
| scan0335 | The balance weight scheme for a 25 HP shaft. | ||
| View original record | 8 BALANCE WEIGHT SCHEME FOR 25 HP. SHAFT E.55619 (big pin). All balance weights set at 180° to position of crankpin. Nos. 1, 6, 7, 12 of 1 unit such to balance 1/2 of the out of balance per crank of… | ||
| scan0336 | Data sheet listing specifications for P.II. and 25 HP engine components, focusing on crankshafts, balance, and flywheels. | ||
| View original record | 8634 May 1931. FILES. X.634. X.7010. X.5010. USEFUL DATA. P.II. Torsional period at 100 m.p.h. or 3900 r.p.m. standard crankshaft. Torsional period of chamfered shaft with 14EV 12 weights to Lec.2616… | ||
| scan0337 | Causes and potential cures for 'booms' and 'jelly-ing' in cars. | ||
| View original record | To Hd. From Hs/Les. c. to EP. Mx. c. to Wor. BOOMS. Owing to the possibility of more cars coming to the works with a complaint of booms, we feel it is time that you were ready to handle such cars. At… | ||
| scan0338 | Technical memo discussing the adjustment of scuttle bolts and the use of a rubber column bracket to manage torque reaction and vibration. | ||
| View original record | - 2 - Hs/Les.12/KT.4.5.31. Scuttle bolts and rubber column bracket. These on occasions will give 50% cure, but generally not more than 25%. Scuttle bolts. should be set as loose as possible providing… | ||
| scan0339 | Blueprint for a Rear Engine Foot Plate. | ||
| View original record | Hs 336, A, 3.000 ± 5, 2.200 CRS ± 2, .400 Rad, 6. S.W.G. (.192), 3.000 ± 5, 2.200 CRS ± 2, 1.450 ± 5, 4 Holes Ream, .375 ± 1 Dia, .250 Rad, 1.500 ± 10, Section A A, Rear Engine Foot Plate, MATERIAL… | ||
| scan0340 | Blueprint for a Rear Engine Foot Plate. | ||
| View original record | Hs345 3.000±5 2.300 CRS±2 4 Holes drill .128 Dia C'sk .225 Dia at 90° Incl ∠ .150 Rad 1.150±5 4 Holes Ream .212 Dia C'sk .620 at 120° Incl ∠ 1.450±5 .250 Rad 1.500±10 6.S.W.G.(192) Material S/M Rear… | ||
| scan0341 | Arrangement of tie rod supporting spare wheel carrier (side) to dash. | ||
| View original record | D 73306 3 OFF K4407 WASHER G73734 - SCREW K9008 - WASHER SHORTEN SCREWS TO SUIT 6 HOLES .250+2 DIA IN DASH 1.050 +.15 .625 +.1 K6723 (DRILLED .075 FOR SPLIT PIN.) F74210 THE ACTUAL POSITION OF THE… | ||
| scan0342 | Drawing of a rubber isolation steering column support bracket. | ||
| View original record | F83615, D TYPE STEERING, STANDARD BRACKET & CAP, RUBBER, F.83612 BRACKET, F.83614 PACKING, F.83613 CAP, 40°, .062, .125, RUBBER ISOLATION, STEERING COLUMN SUPPORT BKT., PT, HLG.N., 475 / 8/4/31 | ||
| scan0343 | Car engine suspension designs and vibration damping for P.2 and J.1 models. | ||
| View original record | Hs. from R. c. Sg. Wor. LHS. c. BV. HV. EP. X634 R2/M7.5.31. X.7005 X.5005 X.634 CAR ENGINE SUSPENSION. EXISTING P.2. AND J.1. We are just completing the design for the front central engine support,… | ||
| scan0344 | Investigating a 'booming' noise, determining its periodicity and concluding it is a body or frame characteristic. | ||
| View original record | Sg. LHS. } FROM R. PN. } c. Wor. Hs. E. c. Da. EP. X634 R8/M7.5.31. P.2. BOOMING. X.634 X.7830 Last Thursday - April 30 - we had much discussion on the above with the following result. It will be… | ||
| scan0345 | The investigation and resolution of a 25 HP gearbox oscillation issue. | ||
| View original record | FOR FILES. 8634 25 HP. GEARBOX OSCILLATION. It was noticed on the production dynamometer that the front of the propeller shaft and rear of gearbox underwent a lateral oscillation of consideraule… | ||
| scan0346 | Technical memo detailing modifications for a 25 HP model, designated 'JAPAN 1'. | ||
| View original record | X634. By. Hs. From R. c. Sg. Wor. c. Hy. RHC. R2/M12.5.31. X.5770 X.5010 X.634. 25 HP. - JAPAN 1. Bodies (Bonnet). This has always been for existing stock bodies. The extra length of bonnet is… | ||
| scan0347 | Continued memorandum on vehicle component alterations for the crankchamber, brakes, rear axle, and petrol pump. | ||
| View original record | -2- R2/M2.5.31 contd. Crankchamber. There is no alteration except that lower half has already been scalloped for larger pins - (last 10,000 miles test). Brakes. Will have swivelling tips… | ||
| scan0348 | Scheme for fitting balance weights to 25 HP and Phantom engines to address faults. | ||
| View original record | To R. From Hs. c.c. to Sg. Wor. c.c. to E. Da. c.c. to By. x634. Hs.1/MJ.16.5.31. x5010, x634. Referring to - R.2/M12.5.31. As regards balance weights for the 25 HP. we have never yet received a… | ||
| scan0349 | Crankshaft balance weights and critical speeds for the 25 HP and Phantom 11 engines. | ||
| View original record | -2- Hs.1/MJ.16.5.31.Cont'd In the case of the 25 HP. with the big pin crankshaft with twelve balance weights on, the master period is at 4,200 R.P.M. which can begin to be felt at 51 m.p.h. on third… | ||
| scan0350 | Blueprint comparing two design schemes for a crankshaft with performance data. | ||
| View original record | CRANKSHAFT E55619 SUGGESTED SCHEME SCHEME 1402 ROLLS - ROYCE LTD PRINT No 16 MAY. 31 DERBY. SCHEME 1402 - I PER WEIGHT = 27.1 IN4 CRITICAL SPEED = 4200 RPM [12 WTS] SUGGESTED - " " " = 12.55 IN4 " "… | ||
| scan0351 | Engine smoothness and the effects of various balance weight schemes. | ||
| View original record | Hs. from R. c. Sg. Wor. c. Rg. E. X634 R5/M18.5.31. ENGINE SMOOTHNESS X.634 X.5010 X.7010. It is understood that you are satisfied with the smoothness of our engine without in any reducing the… | ||
| scan0352 | Different balance weight schemes for an engine to reduce stress and vibrations. | ||
| View original record | Rg. } FROM R. Hs. } c. Sg. Wor. c. Ev. E. X634 R2/M19.5.31. BALANCE WEIGHTS. X.634 X.5010 X.7010 Referring to Hsl/MJ16.5.31, we are pleased to hear that these are vigorously being pushed forward by… | ||
| scan0353 | Engine balance weight schemes, experiments, and designs for 25 HP production. | ||
| View original record | R2/M19.5.31 contd. -2- the half weights are correct provided there is no error in the angle, which in the 8 weight scheme is not likely to occur. Regarding the 4 weight scheme we now see that this… | ||
| scan0354 | Effect of balance weights on flywheel wobble in Phantom II and 25 HP models. | ||
| View original record | Copy X6-34 To R. From Hs. c. to Sg. Wor. c. to E. Da. c. to Ey. Hs.5/MJ.23.5.31. X.634. X.5010. X.7010. BALANCE WEIGHTS P.2 & 25 HP. Effect of balance weights on Flywheel Wobble. PHANTOM II. On… | ||
| scan0355 | The testing of flywheel balance weights and their effect on performance and wear. | ||
| View original record | -2- Hs.5/MJ.23.5.31.Cont'd. then removed all balance weights. The flywheel period was then definitely worse and was spread over a wider range of speed. We then fitted the 6 balance weights. With these… | ||
| scan0356 | Solutions for flywheel flutter and vibration by modifying the flywheel's centre of gravity and mass. | ||
| View original record | Hs. FROM R. X634 copy. R2/M27.5.31. C. to SG. C. to WOR. C. to BY. FLYWHEEL FLUTTER. We cannot expect to cure any of the present car vibration troubles entirely, and must work on minimising by a small… | ||
| scan0357 | Instruction to fit stronger springs to bonnet clips when removing rear engine feet. | ||
| View original record | 8654. To Hd. From Hs/Les. " EP. MX. " Wor. Hs/Les.1/KT. 28. 5. 31. x7260. P.II. BOOMS. When removing the rear engine feet from customers cars, we consider stronger springs E.81914 should be fitted to… | ||
| scan0358 | Investigation into a gear rattle on the 25 HP model, particularly on overrun when hot. | ||
| View original record | 8634 To R. From Hs/Grys. c. to Sg. Wor. c. to E. Da. c. to By. Hs/Grys.1/MJ.29.5.31. x634 x5310 GEAR RATTLE. 25 HP. We have noticed, particularly with the low inertia flywheel (LeC.2530), a rattle in… | ||
| scan0359 | Technical note on experiments with a flexible drive between the flywheel and gearbox, and the resulting gear rattles. | ||
| View original record | -2- Hs/Grys.1/MJ.29.5.31.Cont'd. We are also experimenting with a flexible drive between the flywheel and gearbox P.2. When we replaced the Hardy joint on 25-EX. by a steel disc gear rattles were… | ||
| scan0360 | High-speed engine smoothness tests for a 25 HP car fitted with a new roller tail bearing. | ||
| View original record | To PN. from Hs/Rm. c. to Sg. LP. y634. Hs/Rm. 3/KT. 30.5.31. HIGH SPEED ENGINE SMOOTHNESS. Y7960. W.W. are now considering giving us a tail bearing to cure the flywheel period, on the 25 HP. The Aero… | ||
| scan0361 | Experiments with a torque arm for Phantom II engine mounting. | ||
| View original record | 8634 To R. From Hs/Les. c.c. to Sg. Wor. c.c. to S. Da. c.c. to Ey. Hs/Les.3/MJ.2.6.31. X.7005. X.634. PHANTOM 2 ENGINE MOUNTING. Acting on your suggestion, we carried out experiments using the torque… | ||
| scan0362 | Report verifying that piston motion is the cause of overrun gear rattle in a 25 HP engine. | ||
| View original record | To R. From Hs/Gry. c. to SG. Nor. c. to E. Da. c. to Hy. 8634. Hs/Gry.5/KT.9.6.31. X.634. X.5310. 25 HP. GEAR RATTLES. Continuing our report Hs/Gry.1/MU.29.5.31. we have been able to verify that the… | ||
| scan0363 | Test report on jellying, torque reaction, booms, and steering effects from different loads on front torque reaction dampers. | ||
| View original record | COPY. 8634 To R. from Hs/GWH. c. Sg. c. Wor. E. c. Da. Ry. Hotel de France, Chateauroux, France. X7005 4.7.31. 25-EX. TESTS FOR JELLYING, TORQUE REACTION, BOOMS AND THE EFFECT ON STEERING BY DIFFERENT… | ||
| scan0364 | Test report on torque reaction dampers and their effects on vehicle performance and comfort. | ||
| View original record | contd. -2- 2nd. Test. Conditions. Torque reaction dampers had all friction removed. Torque reaction and its effect on front wings. This came on at 8 MPH, maximum at 10 MPH, finished at 11 MPH. The… | ||
| scan0365 | Continuation of a vehicle road test report detailing observations on booms, jellying, and steering. | ||
| View original record | contd. -3- Booms. In Front Seats. These were slightly more pronounced, 25% than 2nd test. They started at 10 MPH, was most pronounced at 25 and faded out at 40. On the retard there was a general… | ||
| scan0366 | The results of the 5th test, detailing conditions, torque reaction, booms, steering, and wing jelly-ing. | ||
| View original record | contd. -4- 5th Test. Conditions. Torque reaction dampers set to have a friction load of 22 lbs at a leverage of 5.25 inches. Torque reaction. The torque reaction caused 25% more movement of the wings.… | ||
| scan0367 | Tests to overcome flywheel vibration and gear rattle on a 25 HP engine using a stiffened flywheel. | ||
| View original record | Y634 To R. From Hs/Gry. c. to Sg. Wor. c. to E. Da. c. to By. Hs/Gry.1/WJ.8.7.31. 25 HP. FLYWHEEL VIBRATION & GEAR RATTLE. X5310 Further to our Hs/Grysl/WJ.29.5.31. in which we suggested that we had… | ||
| scan0368 | Blueprint of a Hardy coupling for a clutch, showing plan and cross-section views. | ||
| View original record | Hs 374 HARDY COUPLING FOR CLUTCH L.C. 2830 20° x 20° Rd 6.500 DIA 5.660 DIA CTS 4.250 DIA 2.500 DIA 4 HOLES 1/8A FIT .050 .030 .010 .125 .810 .250 2.225 HARDY FABRIC HS 375 OTHER DIMENSIONS & SPLINES… | ||
| scan0369 | Flywheel vibration issues on the 'CHINA' project, worsened by attempts at stiffening. | ||
| View original record | HS. FROM R. X634 R2/M21.7.31. C. to SG. WOR. C. to E. BY. 'CHINA' - FLYWHEEL VIBRATION. X. 634 X. 5300 In stiffening this with extra bearing and stiffer flange the result is much worse, and I think:… | ||
| scan0370 | Experiments with balance weights to reduce flywheel vibrations in a 25 HP engine. | ||
| View original record | To H. From Hs/Gry. c. to SG. Nor. c. to DE. E. c. to By. 8634. X.5010. X.634. Hs/Gry.2/MJ.22.7.31. 25 HP. BALANCE WEIGHTS & FLYWHEEL VIBRATIONS. We have previously tried balance weights on 16-G4 to… | ||
| scan0371 | Calculations regarding balance weights for the stiffened Phantom crankshaft Lec.2925. | ||
| View original record | To R. from Hs/Cry. c. Sg. Wor. c. E. De. Ry. X034 Hs/Gry/2/AIII.9.31. x7010 40/50 BALANCE WEIGHTS. We have carried out some calculations as to the amount of balance possible with the stiffened Phantom… | ||
| scan0372 | Drawing and calculation for a balance weight for LEC 2925. | ||
| View original record | 1/4" THICK 15.0" 4.6 lbs Moment 11.5 lbs-ins INERTIA = M/2 (a² + x²) r a 2.3 (3.5 + 16) = 45 lbs-in² BALANCE WEIGHT FOR LEC 2925 | ||
| scan0373 | Cause and proposed remedy for friction plate breakages in a 40/50 HP chassis low inertia damper. | ||
| View original record | COPY. X634 X.5010. X.634. BY.6/G.11.8.31. F. c. to Wor. c. to Hs. c. to Mx. 40/50 HP. CHASSIS - LOW INERTIA DAMPER. ------------------------------------- We have had one of the friction plates break… | ||
| scan0374 | Request to manufacture a Torsional Vibration Damper for a 25 HP engine, specifying materials. | ||
| View original record | γ634. To RHC. From Hs/Gry. Hs/Gry.9/MJ.17.8.31. TORSIONAL VIBRATION DAMPER. Will you please make a damper for the 25 HP. to the accompanying sketch (Hs.433). If you do not consider the driving member… | ||
| scan0375 | Vibration damper for a 28 HP, 2 inch pin crankshaft. | ||
| View original record | N = P * 0.516 W^2 = .053 N.M/M^2 μ = 7380 lbs ft/RDM LATEST (illegible) TAPER REMOVE INNER EDGES 1 OFF S/CV 3 STARTS .500 LEAD L.H. SPIRAL 29° LOCKING NUT TO BE TIGHTENED WHEN OIL RETAINER IS SECURED… | ||
| scan0376 | Engine balance weights and flywheel vibration issues on a 25HP model. | ||
| View original record | X634 HS. ) FROM R. BY. ) R1/M19.8.31. X.5010 X.634. C. to SG. WOR. E. 25HP. - BALANCE WEIGHTS. (1) The car brought to WW. on the 18th, had 12 units of balance weight = crank and big end, which… | ||
| scan0377 | Outlining the design specifications for a proposed harmonic damper. | ||
| View original record | 8634. To E. From Hs/Gry. Hs/Gry.1/MJ.21.8.31. Herewith sketch of proposed harmonic damper. The polar moment of inertia is 13.8 lbs. in.² or about one tenth of the effective interia of the crankshaft… | ||
| scan0378 | And comparing different designs for a dynamic balancer. | ||
| View original record | X634 HS. ) FROM R. BY. ) RL/M22.8.31. C. to SG. WOR. re. DYNAMIC BALANCER. ---------- We have received your suggestions for the above, and in return send you the two designs we had made. In the first… | ||
| scan0379 | Causes of three separate low inertia damper spring plate failures. | ||
| View original record | To E. from Hs/Lid. c. Ey. c. WOF. MX. 8634 Hs/Lid/AD24.8.31. X.634. X.5010. LOW INERTIA DAMPER - SPRING PLATE FAILURES. Ry6/G11.8.31. The total number of failures to date appears to be three. (1) On… | ||
| scan0380 | The design and effectiveness of an auto friction damper for the 40/50 model. | ||
| View original record | To E. From Hs. 634. Hs.12/MJ.24.8.31. AUTO FRICTION DAMPER. ON THE 40/50. You will remember at the time when this was designed the demand for it cheifly came about because of the "bus knocks" which… | ||
| scan0381 | Providing patent drawings for two dynamic balancer schemes. | ||
| View original record | X1634 BY. FROM E. E1/M26.8.31. C. to SG. WOR. HS. J. 3. DYNAMIC BALANCER. Please find herewith Lec.2939. and 2941. shewing patent drawings for the two schemes mentioned in R1/M22831. E. | ||
| scan0382 | Tests to find the effect of the amount and position of balance weights on flywheel vibration for a 25 HP engine. | ||
| View original record | 8634 To R. from Hs/Gry. c. SG. c. W.O.R. E. c. De. EV. Hs/Gry/AD27.9.31. 25 HP. BALANCE WEIGHTS. X5010 We have carried out tests to find out the effect on the flywheel vibration at 3100 R.P.M. or 42… | ||
| scan0383 | Blueprint showing three numbered line schematics. | ||
| View original record | 1., 2., 3., ∞ | ||
| scan0384 | Use of harmonic balancers in American cars and proposing a design for a 3.5-litre engine. | ||
| View original record | 8634 To R. From Hs/Gry. c. to Sg. Wor. c. to S. Da. c. to By. Hs/Gry.7/MJ.27.8.31. X.634. X.5010 HARMONIC BALANCER (DAMPER). We do not know of any American car with its timing gears other than at the… | ||
| scan0385 | Alternative construction for a J.3. Dynamic Balancer and a request for a patent. | ||
| View original record | X684 BY. FROM E. E4/M5.9.31. C. to SG. WOR. HS; J. 3. DYNAMIC BALANCER. We send you herewith LeC. 2946. shewing scheme for alternative construction of dynamic balancer. R. would like you to patent… | ||
| scan0386 | Outstanding rough sketches for a rear engine feet safety plate for chassis No.122-XJ. | ||
| View original record | N-W. RECEIVED 17 SEP 1931 RH14/WG.16.9.31. re Chassis No.122-XJ. We would refer to the last paragraph of your memo ref: Hs/Les12/KT.4.5.31 written under the heading "Booms". The two scheme drawings… | ||
| scan0387 | Test of Chrysler balance weights for a 25 HP engine to eliminate flywheel vibration. | ||
| View original record | To R. from.Hs/Gry c. Sg. c. Wor..E. c. De. PW. x634 Hs/Gry.1/AD21.9.31. x.634 x.5010. BALANCE WEIGHTS 25 HP. We can now report on a test of Chrysler balance weights to LeC.2936 on a car which, without… | ||
| scan0388 | Dispatch of blueprints for booms on Chassis No. 122-XJ, which were previously missed. | ||
| View original record | W-N. To A/M. From Hs/Les. 8634. Hs/Les.11/MJ.23.9.31. Re. Chassis No.122-XJ. With reference to your memo A/RH14/WG.16.9.31. re. booms. We understand that Mx. despatched to you on the 12th.inst. all… | ||
| scan0389 | Conclusions on engine balance weights, flywheel vibrations, and crankchamber deflections. | ||
| View original record | COPY. 8634 RC. BY.) FROM R. HS. ) C. to SG. WOR. E. re. BALANCE WEIGHT, FLYWHEEL, CRANKCHAMBER DEFLECTIONS, & BEARINGS. R2/M28.9.31. X634 X7010 X5010 X7000 X5000 We have now straightened this matter… | ||
| scan0390 | Tests conducted on flywheel vibrations for the 25 HP engine. | ||
| View original record | x634. 30.9.31 X.634. X.5300. 25 HP. FLYWHEEL VIBRATIONS. We have carried out further tests on the tail bearing to LeC.2920. The first test on 19-GIV in conjunction with a stiffened flywheel to GL.475… | ||
| scan0391 | Test report on a 25 HP low inertia spring drive, detailing damping load experiments and modifications. | ||
| View original record | X634. 30.9.31. 25 HP. LOW INERTIA SPRING DRIVE X5020. This type of slipper wheel has been fitted to units C.1, C.9 (transferred to R's car C.3 unit), 14-G6 and C.7 (10,000 miles). The original damping… | ||
| scan0392 | On the trials for car 129-GN, detailing efforts to reduce drumming and booming with mixed results, including increased steering wheel vibration. | ||
| View original record | COPY. X634 FN.6/WT2.10.31. Sg. From PN. c. to Cx. c. to Hs. X.7960. X.634. 129-GN. Trials. Mr. Leslie from the Experimental Dept. spent most of the day on this car yesterday with a view to trying to… | ||
| scan0393 | 25 HP engine roughness, detailing tests on a thin flange flywheel and Chrysler balance weights. | ||
| View original record | To R. From Hs/Gry. c. to Sg. Wor. c. to E. Da. c. to By. 8634 Hs/Gry.6/WJ.5.10.31. 25 HP. ENGINE ROUGHNESS. X.634. X.5300. X.5010. Our tests on the thin flange flywheel have shewn that its effect is… | ||
| scan0394 | Flywheel vibration and balance weight testing for the 25 HP engine. | ||
| View original record | 6634. To R. From Hs/Gry. c. to Sg. Wor. c. to R. Da. c. to Sy. Hs/Gry.5/KT.19.10.31. X.5300. X.634. X.5010. 25 HP. FLYWHEEL VIBRATION & BALANCE WEIGHTS. Continuing our report Hs/Gry.6/WJ.5.10.31. in… | ||
| scan0395 | Balancing of a crankshaft and the scheme of balance weights. | ||
| View original record | HS. ) FROM R. BY. ) C. to SG. WOR. COPY. X634 R7/M20.10.31. X634 X7010 X5010 BALANCING OF CRANK - 12/8 SCHEME OF BALANCE WEIGHTS. I cannot see any reason why it should not be easy to balance a… | ||
| scan0396 | Engine vibrations and improvements using diamond mountings and torque reaction dampers on a 6-cylinder engine. | ||
| View original record | COPY. SG. FROM R. C. to WOR. BY. HS. C. to E. DA. γ634 R3/M20.10.31. X634. ENGINE VIBRATIONS. It seems pretty universally agreed that with the diamond mounting fitted with torque reaction dampers and… | ||
| scan0397 | Requesting the return of calculations for a Buick type vibration damper to aid in investigating their own damper design. | ||
| View original record | To E. from Hs/Gry. Y634. Hs/Gry.3/KT.22.10.31. VIBRATION DAMPERS. If you have finished with those calculations on the Buick type damper, we should be glad to have them back to investigate our own type… | ||
| scan0398 | Letter to a supplier regarding the failure of a cotton duck washer for a crankshaft damper and a request for a stronger version. | ||
| View original record | No34. He/Rm.1/AD. November 2nd, 1931. The British Belting & Asbestos, Ltd. 59, Southwark St. London, S.E.1. For the attention of Mr. E.D. Delmaine. Dear Sirs, You will remember that you supply us with… | ||
| scan0399 | Letter from British Belting & Asbestos Ltd acknowledging an inquiry about Cotton Discs E.55092 for a crankshaft damper. | ||
| View original record | x634. EDD BRITISH BELTING & ASBESTOS LTD TELEGRAMS SCANDINAVIA LONDON TELEPHONES HOP 6071·2·3·4 HALO NON-METALLIC CLUTCH AND BRAKE LININGS SCANDINAVIA COTTON CONE LINERS AND BONNET LINING MINTEX… | ||
| scan0400 | Effects and measurement of friction torsional vibration dampers. | ||
| View original record | 8634. To R. From Hs/Gry. c.c. to SS. Wor. c.c. to E. Da. c.c. to By. Hs/Gry.4/KT. 7.11.31. FRICTION TORSIONAL VIBRATION DAMPERS. According to Carter's calculations this type of damper lowers the… | ||
| scan0401 | Tests of balance weights and the relative merits of standard vs low inertia spring drives on the 25 HP model. | ||
| View original record | V634 R. from Hs/Gry. c. to Sg. Wor. c. to E. Da. c. to By. Hs/Gry.5/KT. 7.11.31. X.634. X.5010. BALANCE WEIGHTS 25 HP. We have carried out tests on the relative merits of the standard and low inertia… | ||
| scan0402 | Experiments to improve frame torsional stiffness on larger cars by rigidly mounting the engine and gearbox. | ||
| View original record | HS. FROM R. C. to SG. WOR. BY. re. LARGER CARS. X634 R3/M28.11.31. Sent off 30.11.31. X.634. X.7380. My impression is that we must do something to improve these in torsional stiffness so that the… | ||
| scan0403 | Tests to resolve timing gear rattles on a 25 HP engine. | ||
| View original record | X634 HE/Gry.1/WJ.30.11.31. X5020. To R. From Ha/Gr/. c. to Sg. SdT. c. to E. Da. c. to SY. TIMING GEAR RATTLES. With the new high lift camshaft on the 25 HP. and the stronger valve springs to bounce… | ||
| scan0404 | Experiments investigating flywheel vibration on a 25 HP engine using a balanced crankshaft. | ||
| View original record | To R. From Hs/Gry. c. to Sg. Wor. c. to Rg. E. c. to By. Da. 8634 Hs/Gry.4/WJ.1.12.31. 25 HP. FLYWHEEL VIBRATION. X5010. As suggested by R. we have carried out experiments on a balanced crankshaft… | ||
| scan0405 | Photographic study of crankshaft vibration patterns under different balancing conditions and speeds. | ||
| View original record | Top row, left to right: Image 1: 2400, No Balance Weights Image 2: 2400, 95% Balance Middle row, left to right: Image 3: 3300, 95% Balance 41 fms at Periphery Image 4: 2400, No Weights 41 fms at… | ||
| scan0406 | Blueprint of a mechanical component with dimensions and load forces indicated. | ||
| View original record | 1/2 lb 2" 7" 1/2 lb OK | ||
| scan0407 | Cover note for documents regarding a J.3. Crankshaft Damper and associated crankcase modifications. | ||
| View original record | x634. BY. FROM E. EL/M19.12.31. (634. C. to SG. WOR. HS. J. 3. CRANKSHAFT DAMPER. We send you herewith Lec.2977. - Crankshaft Damper, and Lec.2985. - Modifications to Crankcase in connection with the… | ||
| scan0408 | Advance test of a J.S. crankshaft damper on a 20/25HP engine. | ||
| View original record | R. FROM E. C. to SG. WORHS. BY. X634 EL/M21.12.31. G34 J. S. CRANKSHAFT DAMPER ADVANCE TEST ON A 20/25HP. ENGINE. We have looked into the question of fitting a J. S. drum type damper to the 20/25. for… | ||
| scan0409 | Alternative design for a crankshaft drum damper using rubber blocks. | ||
| View original record | X634 BY. FROM E. E5/M23.12.31. X634 C. to SG. WOR+ HS. J. 3. ALTERNATIVE CRANKSHAFT DAMPER. We send you herewith LeC. 2978. shewing an alternative design of drum damper in which the masses do not slip… | ||