Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | From F.H.R. to Mr. Swetnam requesting a trial drawing to increase crankshaft rigidity. | ||
| View original record | H92-T.H 90-01: Aoy. 14)(a og) + zzr .H.H 15th June 1910. Mr. Swetnam. 15/6/10 R1/D15610 Will you please get out the necessary trial drawing for increasing the crankshaft until the vibration is about… | ||
| Scan002 | Departmental memo discussing methods to reduce vibrations in a six-cylinder engine. | ||
| View original record | R.R. 348A (100 H) (M 42. 10.2.10). E. P. 6019. DEPARTMENTAL MEMO. Issued: 2nd November 1910 This column is for Name of Person addressed. C.J. X634 DATE. 2/11/10 6-cylinder question. R16/D21110… | ||
| Scan003 | Departmental memo discussing the cause of engine rattles and vibrations, attributing them to a heavier paper wheel. | ||
| View original record | DEPARTMENTAL MEMO. Issued 2nd November 1910 This column is for Name of Person addressed. C.J. DATE. (2) has very slight rattles, and 1600, in which the rattles were developed to an unbearable amount,… | ||
| Scan004 | Exchange regarding the preparation of a demonstration car for a show to exhibit the absence of crankshaft vibration. | ||
| View original record | DEPARTMENTAL MEMO. Issued 4th November 1910 To C.J. 4/11/10 CJ12/D41110 If we can get a good back axle on 1800 would you like this sent up for the Show for demonstration of the absence of crankshaft… | ||
| Scan005 | Letter discussing car vibrations, competitor analysis, and the need for a forward move before an exhibition. | ||
| View original record | X 634 7th November 1910 Dear C.J., I think it would be nice if we would find out what the other people are doing for vibrations before we show ours off. We have been out this morning with two cars,… | ||
| Scan006 | Page two of a letter discussing ideas and plans in anticipation of a show. | ||
| View original record | (2) 7th November 1910 we have plenty of ideas before us, before seeing the Show, on which to act. After seeing the Show, we probably shall have still more. Yours sincerely, F.H.R. R.R. 255A (100M) (P.… | ||
| Scan007 | Test results for engine rattles at various speeds and the effect of fitting stinger stops. | ||
| View original record | R.R. 148 (90 R) (F 548.10.10.10) G 1120. Y634 4100 Engine - rattles. - tests on 14G3 - 24.9.20 cam shaft. E488 - weaker stay & 3rd drive. 2nd gear stator roller. | 3rd | Engine speeds. 13 | . | .. 560… | ||
| Scan008 | Engine vibration test performed on a dynamometer. | ||
| View original record | R.R. 148 (20 H) (P 548.10.10.10) G 1130. 4634 . 4100 Engine vibrations 1602 - test with stiffer drive, large diam. on dynamometer, 29/11/10 When tightened right up - revs of engine rattles at. 14 -… | ||
| Scan009 | Departmental memo about crankshaft vibrations and the performance of an engine with a heavy front flywheel. | ||
| View original record | R.R. 348A (100 H) (M 42. 10.2.10). E.P. 6019. DEPARTMENTAL MEMO. Issued 13th December 1910 This column is for Name of Person addressed. C.J. X634 DATE. 13/12/10 Crankshaft Vibrations. R6/D131210.… | ||
| Scan010 | Record of a vibration test on a '1400 type' engine, listing engine RPM, MPH, and observed vibration levels. | ||
| View original record | R.R. 148 (20m)(P. 689.14.11.10) G 1939. [Illegible crossed out text] John & Iles a Test 25/1/'' 4160 Vibrations on list engine as shown X6324 on water in a tin fixed to cylinder on 1400 type engine 22… | ||
| Scan011 | The 1100 type engine. | ||
| View original record | 1100 type engine. | ||
| Scan012 | Note on testing balance weights fitted to a crankshaft. | ||
| View original record | R.R. 148 (20 R) (P 548.10.10.10) G-1130. Engine X634 . 1/2/11 Balance weights to crank-shaft 4100 Fitted to 1649 chassis 24 1/2" capacity slipper wheel solid crank pinion. There was no noticeable… | ||
| Scan013 | Increasing crankshaft rigidity for the 1600 car to reduce vibration and increase power. | ||
| View original record | y 23rd March 1911 C.J. 23/3/11 R3/D23311 We are still very interested in crankshaft vibrations and we are making for the 1600 car, which has the crankshaft of increased diameter, one which will also… | ||
| Scan014 | Enclosing notes on the damping of crankshaft vibrations. | ||
| View original record | R.R. 225a (100M) (W 314. 8.3.11) G 1525. y. 26th April 1911 C.J. 26/4/11 R9/D26411 I enclose some notes on the damping of crankshaft vibrations. I will try to add to these. F.H.R. See Guard book O.K.… | ||
| Scan015 | Deflexion test results for an aero crankshaft with thin webs and standard size pins. | ||
| View original record | R.R. 148 (20 H) (W 414-454H) G 1016. Rogers V634 4100 Aero Crank shaft - pure w. thin webs & standard size pins. Deflexion test by Brognall. & about. March. 1918. One end locted & anchored. 40" a'… | ||
| Scan016 | Test results for engine rattles on an extra strong crankshaft type. | ||
| View original record | c R.R. 149 (W 414. 13.4.11) G 1616. X634 4100 Engine rattles - Crankshaft periods. Extra strong type Tested on special strong crank shaft. 2 1/2" pins + thick webs. (not specially lightened). Slitter… | ||
| Scan017 | Test notes on engine rattles related to a special crankshaft ferodo with clichered webs. | ||
| View original record | R.R. 148 '20 M) (W 414. 13.4.11) G 1616. X634 H100 crankshaft ferodo special crankshaft clichered webs only. Engine rattles No slipper wheel. now standard taken on H179, loose connect body. tested on… | ||
| Scan018 | Test note on 'bar rattles' and chatter experienced at various speeds and conditions. | ||
| View original record | B.R. 148 (20 H) (W57. 24.1.11) G 1410. | ||
| Scan019 | Construction of universal joints and shafts to investigate the cause of high-speed engine vibrations affecting the carburettor needle. | ||
| View original record | R.R. 348a (100 H) (W 587. 4-4-11) E.P. 8817. DEPARTMENTAL MEMO. Issued 19th June 1911 This column is for Name of Person addressed. DATE. Mr Barrington 19/6/11 X634 R15/D19611 We had in construction… | ||
| Scan020 | Engine test notes regarding 'thuds' and crankshaft distortion. | ||
| View original record | R.P. 148 (20n) (W 414 13 4 11) G 1616. X634. 4100. Engine "Thuds" & crankshaft distortion etc. 1/6/11 Test on 1486 (new) chassis fitted with external slipper wheel, with pointer against rim of slipper… | ||
| Scan021 | Experiments on a standard engine test plate investigating crankshaft whip and thuds. | ||
| View original record | R.L. 148 (30 H) (W 414 13 4 11) G 1616. Engine Thuds X634 4100/1/2/11 no further expts 1400 Experiments on test plate, standard engine firing on intermediate plugs, clutch was taken out; when firing… | ||
| Scan022 | Notes on engine rattles felt on the chassis due to crankshaft periods, with test results. | ||
| View original record | E.H.R. 148 (90 R) cW 157. 24.1.11) G 1410. Engine Period X634 4100. Rattles -, felt on chassis at start. what art. from crankshaft periods, damped out by Setter wheel On 166B. - bad case. If full… | ||
| Scan023 | Test notes on a large heavy external slitter drive, detailing issues with rumbles, rattles and luntiness. | ||
| View original record | Engine X634 Slitter drive tests 4100. Large heavy external slitter drive (24 axle) tested on 1663- (at time suffering from rumbles. - felt in S.B. - "coronation" rattles). Coronation rattles improved… | ||
| Scan024 | Engine rattles and the effectiveness of a slipper drive. | ||
| View original record | Slipper drive is effective as a cure of crank rattles with the least possible set on the stop is effective up to nearly tight. But has other troubles in tightening up. If slack or easy - coron.… | ||
| Scan025 | Vibration and rattle experiments on engine X634 with an old type 'Coronation' crankshaft. | ||
| View original record | ENGINE X634 Vibrations. 1649. old type crankshaft 6 lbs compression "Coronation" & Retard rattles Experiments. Result. Nº1 Balance weights fitted. | No difference " 2 Slipper wheel slacked off &… | ||
| Scan026 | Record of experiments testing different engine piston weights and flywheel configurations. | ||
| View original record | Nº. Experiment. Result. 10. Fitted with pistons 3 lbs on Tops. Rattles Bad. 12. Fitted with heavy flywheel. Improvement. 13. Fitted with Balance weights. No difference. 14. Fitted with pistons 2 lbs… | ||
| Scan027 | Over-running noise from the coupling between the engine and gearbox, suggesting design improvements. | ||
| View original record | Copy sent Messrs Bailey & Platford Nov: 18/1911 19th meeting 17th November 1911 R4/D171111 C.J. Over-running noise caused by the coupling between the engine and the gear box.… | ||
| Scan028 | Page discussing the effect of vacuum in the induction pipe on coupling rattle. | ||
| View original record | (2) of the engine when air is admitted to the induction pipe and when the induction pipe has in it a considerable vacuum, i.e. the pressure considerably below the atmosphere. This would make a great… | ||
| Scan029 | High-speed over-running rattles, flywheel dynamics, and potential solutions involving coupling elasticity. | ||
| View original record | Copy R.M.S. DUNOTTAR CASTLE. November 19th. 1911. Referring to the high-speed over-running rattles, I do not think that we are on quite the right track. We have effectively two flywheels, i.e. the… | ||
| Scan030 | Methods to reduce faults by increasing frame rigidity, improving clutch couplings, and testing shaft alignment. | ||
| View original record | (2) To decrease this fault, the frame should be increased in rigidity by increasing its depth or trussing as suggested for decreasing body, and by increasing the length of coupling as is done in a… | ||
| Scan031 | Guide illustrating the test for parallelism and concentricity of gearbox shafts. | ||
| View original record | (3) R.R. 235A (100H) (W 955 14.10.11) G. 2053 Conclusions arrived at in these notes. 1st test every car on completion for parallelism of crank "gear box shafts thus :- 1. Bad. not parallel but… | ||
| Scan032 | Page detailing suggestions for improving a vehicle's coupling and frame alignment. | ||
| View original record | (4) 2nd. point, to see if trussing or deepening the frame, keeps the alignment more constant. 3rd. The introduction of small amount of elasticity in or about the coupling (I have much faith in this as… | ||
| Scan033 | Investigation into rattles from the flexible steering drive. | ||
| View original record | X634 Section. 4100 G138 DESCRIPTION:- Rattles (born) - Flex. Stg drive (CS-TS-11) solid limit with plates Date sheet from office: 9-12-11 Date received: 9-12-11 Date Works instructed: 9-12-11 Material… | ||
| Scan034 | Test results for car and engine speeds with different silencer configurations. | ||
| View original record | X634 4100. Car & Engine Speeds. No 6. engine 60501 (20 pinion) .85 throat. wt.3350lb 4th gear 50 m.p.h. Engine speed 1320 revs. 3rd gear 45 m.p.h. (maximum) Engine revs 1430. rattle at 1110 revs. 2nd… | ||
| Scan035 | Flywheel, magneto, and engine coupling rattles on an engine test plate. | ||
| View original record | X634 Section 4100 Description: Large flywheel + magneto + engine coupling rattles. on engine test plate. Left Column: Date: 30/12/11, Report: H. undi. to note of above any improvement as compared with… | ||
| Scan036 | From the 99th Meeting regarding fixing 'Coronation rattles' by a method other than making the flywheel heavier. | ||
| View original record | R.R. 348c (100 H) (X 99. 4.8.11). E.P. 9457. DEPARTMENTAL MEMO. Issued December 20th, 1911. This column is for Name of Person addressed. DATE. CJ26/C201211 Mr. Barrington. 20.12.11. 99th Meeting.… | ||
| Scan037 | From Mr. Royce discussing engine vibration improvements by reducing compression and trying a 'Mea' magneto. | ||
| View original record | Copy. N1/B3212. 21st January 1912. Le Canadel. Members of the Technical Committee. Re Engine Vibrations. (1) Mr Royce thinks the engine might be improved as regards vibration by reducing the… | ||
| Scan038 | To the Technical Committee regarding the cause and experimental analysis of 'Coronation Vibrations' in cars. | ||
| View original record | Copy. N10/B5212. Le Canadel. 31st January 1912. Members of the Technical Committee. Re Coronation Vibrations. I should imagine these vary in different cars. They appear to me to be generated by the… | ||
| Scan039 | With diagrams discussing the causes of speed variation and proposals to minimize it. | ||
| View original record | (2) engine speed varies spring Balance wheel Road (2) coupling out of line may also cause a difference of speed of turning which would not be affected by any alteration in weight of the flywheel. Also… | ||
| Scan040 | 'Coronation Rattles' and 'Transmission vibrations', attributing the cause to an asymmetrically balanced brake drum and proposing a solution. | ||
| View original record | Copy. N19/B5212. Le Canadel. 31st January 1912. Members of the Technical Committee. Re Coronation Rattles. Re Transmission vibrations. The fact that the brake drum is not symetrical because it is… | ||
| Scan041 | Proposals and a sketch for a spring coupling with friction to prevent oscillation in the drive system. | ||
| View original record | (2) (2) The proposal under (1) deals with the effect, to minimise the cause Mr Royce suggests we should try a spring coupling with friction between the engine and gear box. The springs would take up… | ||
| Scan042 | 'Coronation Vibrations' and the design of damping rings, a brake drum, and a combined spring/friction coupling. | ||
| View original record | TBB33/L21212. February 21st. 1912. Ref. N10/B5212. N19/B5212. Re Coronation Vibrations. The damping rings mounted inside the foot brake drum have been schemed out and will be issued to-day (Feb.… | ||
| Scan043 | Correcting out-of-balance masses and the effects of running-balance, detailing an experiment with a brake drum. | ||
| View original record | (2) In the sketch the out-of balance mass (A) is corrected for standing balance by drilling at the point (B). This of course puts the system out of running-balance as regards the constant angular… | ||
| Scan044 | Balancing factors and experiments, including a handwritten note and sketch. | ||
| View original record | (3) Owing to the small width of this disc, the out of running-balance factor would be extremely small and practically negligible. The coronation rattles with this scheme were exactly the same as far… | ||
| Scan045 | Torsional vibration, balance, and unevenness in components. | ||
| View original record | In reply to - (1) Seems a very slight amount but enough. (2) Also seems a very small amount of unevenness is fatal. (3) These seem all moving. (4) Reason why the torsional vibration affects the car,… | ||
| Scan046 | Engine vibrations, magneto performance, and a preference for smoothness over power. | ||
| View original record | TBB34/L21212. February 21st.1912. Ref. N1/B3212. Re Engine Vibrations. Mr Platford has already reported on this matter. With reference to:- (1) Now it is desired that extra power is rather to be… | ||
| Scan047 | Engine-gearbox alignment, piston design, and a proposed test rig for engine vibrations. | ||
| View original record | FHR 184/12 (6) X639 between the engine and the gear box. I hope to send you a sketch of an apparatus which I think will test this alignment more conveniently than anything they have at present, and it… | ||
| Scan048 | Engine vibration, a novel piston design, and a throttle valve alteration to stop silencer explosions. | ||
| View original record | (7) piston of correct weight but without tops. If the engine vibrates at 2000 revolutions without any gas pressure, then the cause is most likely due to this variation in kinetic energy as mentioned… | ||
| Scan049 | Note from Mr. Royce regarding engine vibrations, compression reduction, and the quality of a Men magneto. | ||
| View original record | Ref. Mr Royce's note on M1/B3212. Members of the Tech. Committee 22.4.12. Re Engine Vibrations. TMM1/1.22412. With reference to the suggestion that the compression should be reduced by liners ¼" thick… | ||
| Scan050 | Note detailing Mr Royce's opinions on the potential causes of 'Coronation Vibrations' in engines. | ||
| View original record | Ref. Mr Royce's note on M1C/95212. Re Coronation Vibrations. TBB4/1.22412. Members of the 22.4.12. Tech. Committee With reference to the suggestion that coronation vibrations are due to the uneven… | ||
| Scan051 | For the Technical Committee regarding Mr. Royce's opinion on Coronation Vibrations and brake drum symmetry. | ||
| View original record | Ref. Mr Royce's note on N19/BD212. x634 Re Coronation Vibrations. TEB6/123412. Members of the Tech. Committee 24.4.12. With reference to the suggestion that the brake drum should be made more… | ||
| Scan052 | List of engine speeds where crankshaft vibrations occur on a 2100 series engine without a slipper flywheel. | ||
| View original record | Crankshaft Vibrations. Crankshaft vibrations occur without slipper flywheel at the following speeds on 2100 series engine. - Revs. per minute. 410 485 550 670 750 - ? Crankshaft 830 950 1100 1320 1610… | ||
| Scan053 | To Mr Johnson discussing investigations into engine vibration in Mr Northey's car. | ||
| View original record | X634 Mr Johnson 21-1-13 TBB6/L21113 Re Engine Vibration - Mr Royce's note dated 16/1/13 (attached) With reference to your note on Mr Royce's memorandum attached. As I advised you at Dover the… | ||
| Scan054 | Report page discussing an investigation into engine vibration caused by crankshaft torque. | ||
| View original record | -2- by the variation in the re-action (acting on the mass of the engine) due to the varying torque on the crankshaft. You will understand that these investigations are necessarily long and tedious,… | ||
| Scan055 | Engine vibration issues in relation to frame stiffening. | ||
| View original record | 6214 COPY. COPY. To Mr. Hives from R. Copy to Wor. Copy to J. R4/P 2.2.14. Re Stiffening Front of Frames. With reference to the stiffening of the frames, and engine vibration:- I thank Mr. Hives for… | ||
| Scan056 | Engine performance, detailing issues with plugs, timing, noise, and the clutch, with a comparison to a Mercedes engine. | ||
| View original record | Wor/H18/L21714. Sheet. 2 Mercedes. X634 I like the idea of the two distributors on the magneto and two plugs, we had a little trouble with pre-ignitions, I believe it was due to the plugs, they were… | ||
| Scan057 | Report from Mr Hives recommending the use of a lightened crankshaft with aluminium oil plugs. | ||
| View original record | Wor/Mcrl/L22714. Re Lightened Crankshaft. X.1843 E. 22-7-14. Na.c. Please note Mr Hives reports on the above as follows :- "I recommend that we use the lightened "crankshaft with aluminium oil plugs.… | ||
| Scan058 | Urgent request for a stethoscope, used for detecting vibrations, required for experiments on the 'Eagle' engine. | ||
| View original record | To Wor. for Exptl. Dept. Copy to EP. for Mr Holgate " " " " " " " D. from OY. x 634 22nd September, 1916. OY1/G22916. Would you please inform me whether you have any knowledge of a Stethoscope which… | ||
| Scan059 | Investigation into chassis vibrations, distinguishing between those caused by engine pulsations versus road shocks. | ||
| View original record | X634 C. EP. Bn13/W291019. RE CHASSIS VIBRATIONS FROM ENGINE PULSATIONS. We have your wire reading:- " Barrington Hives suspect short connecting rods increase amplitude of reaction vibration carefully… | ||
| Scan060 | Letter discussing a vibration issue on a low compression chassis at specific speeds. | ||
| View original record | - 2 - been with us more particularly at speeds from 19 to 24 m.p.h. We may have some opportunity of discussing this point with Mr. Johnson tomorrow when he comes to Derby, but we are anxious that you… | ||
| Scan061 | 40/50 engine vibrations and the difficulty of introducing flexible mountings while maintaining gearbox alignment. | ||
| View original record | R.R. 199 (250T) (SD676 19-7-17) MP 18.865 x.634 To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to Da. Hs6/LG6.8.20. X. 4179. RE 40/50 ENGINE VIBRATIONS. X. 634. Acting on Mr. Royce's instructions we… | ||
| Scan062 | Investigating and rectifying excessive vibration in Mr. Johnson's coupe. | ||
| View original record | To P.N. from R. c. to O.J. c. to Hs. c. to E.P. X634 R6/G21.2.21. X.634. RE. MR. JOHNSON'S COUPE. I had a short ride in Mr. Johnson's coupe, and noted the vibration that Mr. Johnson thought was… | ||
| Scan063 | Engine misfiring, pre-ignition issues, and the adoption of new 'Mercury' ignition plugs. | ||
| View original record | contd. -2- R6/CE1.2.21. changing the pistons. Regarding the misfiring mentioned by Collins, this of course we ought to avoid, being unpleasant and unnecessary. You will be pleased to hear that we have… | ||
| Scan064 | Cause of vibrations in Mr. Johnson's Coupe chassis, 10-LW. | ||
| View original record | To EP. from R. c. to CJ. c. to WOr. c. to PN. c. to Hs. c. to HL. X.634. R6/G1.8.3.21. X. 634 RE MR. JOHNSON'S COUPE - 10-LW. I have been through the correspondence but cannot find that my conclusion… | ||
| Scan065 | Advising against the use of abrasives in engines and detailing cleaning procedures. | ||
| View original record | Contd. -2- RG/G1 8.3.21. ------------ slow speeds than if they were leaking slightly during compression or propulsion. Concerning the use of an abrasive in the engine, such as Turkey-stone dust, I… | ||
| Scan066 | Engine bearing wear, its causes like abrasives, the role of clean oil, and the limitations of oil filtration. | ||
| View original record | contd. -3- R6/C18.3.21. remarks regarding the wear of bearings can be definitely traced to particles of some abrasive, probably emery, or carborundum, being found embedded in the white metal of the… | ||
| Scan067 | Analysis of metal particles found in engine sludge to determine their origin and cause. | ||
| View original record | contd. -4- it would be as well if Mr. Hall had several samples from several engines to confirm his views that the metal particles found came from the walls of the cylinders or the piston rings. This… | ||
| Scan068 | Response to an inquiry about a 'Trepidographe' device for testing chassis springs, stating no information is available. | ||
| View original record | W/S. X634 Sg. from Hs. Hs6/LGS.8.7.21. Referring to your Sg2/BM/2.7.21 and to attached letter from A. Wiklunds Maskin & Velocipedfabrik re. their Trepidographe (outfits on the chassis to register on a… | ||
| Scan069 | Cause of engine vibration on the 40/50 chassis and a proposed solution. | ||
| View original record | X634 Hs. from EP. a. to BY. c. to E. EP13/H14.3.22. Re. ENGINE VIBRATION. 40/50 CHASSIS. ->---------------- With reference to my discussion with you on the above, I still think the general complaint… | ||
| Scan070 | Ongoing issue of engine and chassis vibration in the 40/50 model. | ||
| View original record | X634 Hs. from EP. c.c to BV. c.c to E. EP/5/H23.3.22. Re. 40/50 ENGINE AND CHASSIS VIBRATION. With reference to the discussion we have had in regard to this matter, which has for some time been… | ||
| Scan071 | Excessive vibration issues with chassis 81-TW. | ||
| View original record | TO EP. c.c. to BJ., C. & Cx. RE. CHASSIS 81-TW. I have had an opportunity of forming an opinion about the behaviour of this car now since you had it for a week at the Works. I also read your pencilled… | ||
| Scan072 | Investigation and resolution of engine pulsation and vibration issues. | ||
| View original record | Hs. from EP. c. to PY. c. to Wor. [STAMPED: Hs APR 29 1922 REC'D] Re. ENGINE PULSATION AND VIBRATION. With reference to the above which has had your attention experimentally for some considerable… | ||
| Scan073 | Proposal to experimentally test engine 81-TW to investigate crankshaft end-thrust as a cause of undesirable vibrations. | ||
| View original record | - 2 - EP1/H28.4.22. present the most abstruse difficulties, and it would be interesting to know to what extent with other engines such things as excessive end-thrust in the crankshaft may contribute… | ||
| Scan074 | Requesting an update on the scheduled tests for the 40/50 HP cars at Brooklands Track. | ||
| View original record | To Hs. from BJ. BJ19/H20.6.22. X634 Tests with 40/50 h.p. Cars on Brooklands Track. Hs4/LG15.3.22. Will you kindly let me know when you expect to be able to make the tests referred to? B.J. [STAMPED… | ||
| Scan075 | Directive to cease the development and sale of high compression cars to preserve the brand's reputation for smoothness and silence. | ||
| View original record | To C. from CJ. To Cx. from CJ. To P. from CJ. To H. from CJ. To GOR from CJ. To B. from CJ. To Hulley from CJ. To Evans from CJ. To Sp. from CJ. To Ss. from CJ. Please note and inform all concerned… | ||
| Scan076 | Stressing that quality and testing standards must not be compromised by delivery pressures from the sales department. | ||
| View original record | To C. from CJ c. to Cx., PN., H., Wor, EP., Hulley, Evans, Sp. Hs. Testing officials must not be lured off the path of their duty by representations from Sales officials and others that delivery is of… | ||
| Scan077 | Investigating vibration complaints on a 40/50 chassis, specifically car 107-MG. | ||
| View original record | To R. from Hs. c. to CJ. c. to Wor. c. to BY. c. to EP. c. to Br. c. to PN. X634 Hsl/LG19.7.22. COMPLAINTS OF VIBRATIONS ON 40/50 CHASSIS. X634 Acting on your instructions, I stayed in London and… | ||
| Scan078 | Engine vibration investigations and maintenance work performed on two vehicles at Cricklewood. | ||
| View original record | To R. From Hs. c. to Os. c. to Wor. c. to BY. contd:- -2- instructions they received when the car came in for attention, did not mention anything as regards engine vibration. They had tried the car… | ||
| Scan079 | Typed report discussing engine vibration issues, remedies, and opinions on high-compression car models. | ||
| View original record | contd:- -3- not previously tried the car. I also took up with Br. the question of - what had been done to 81-TW - which you will remember was reported that the vibrations had been overcome by taking… | ||
| Scan080 | Vehicle vibration, comparing pre-war and post-war cars, and investigating causes like fan and dynamo belts. | ||
| View original record | contd:- -4- pre-war cars than we have had on the post-war cars. To look upon vibration as a post-war complaint is absolutely wrong. We have been reducing and raising the compressions on the engine… | ||
| Scan081 | Chassis vibration issues, discussing past remedies and proposed future tests. | ||
| View original record | Contd:- -5- of both these cars, we consider that the people dealing with the finished cars ought to have been able to put them right. The faults of vibrations caused by the fan and dynamo belts have… | ||
| Scan082 | Complaints of vibrations on the 40/50 chassis, focusing on compression levels and belts as potential causes. | ||
| View original record | To Hs, from BJ. Copies to CJ. Wor. BY. EP. BN. Re Hs1/LG19.7.22. RECEIVED F C 21 JUL 1922 BJ13/H20.7.22. X634 X790 X4299 COMPLAINTS OF VIBRATIONS ON 40/50 CHASSIS. I was interested to read your report… | ||
| Scan083 | Testing of 14-tooth axles and compression ratios on 40/50 cars. | ||
| View original record | To Hs. from BJ. - 2 - BJ13/H20.7.22 and substitute another type of belt? Should this be referred to H? Satisfactory 40/50 Cars. We hope that when we have had an opportunity of testing some cars with… | ||
| Scan084 | Torque re-action vibration issues in the 40/50 car, comparing it with other vehicles and considering suspension solutions. | ||
| View original record | To Hs. from R. c. to CJ. & BJ. X. 634 R5/M20.7.22. X. 634 We are interested in the question of torque re-action vibration. This is considered to be the most difficult point that we have to overcome in… | ||
| Scan085 | Goshawk engine mounting to reduce re-action vibration and modifying the 40/50 suspension policy. | ||
| View original record | contd:- -2- commets on this point, or else bring the various chassis here to illustrate the point. As regards Goshawk 1. this as you know was mounted on longitudinal tubes in the hope of reducing the… | ||
| Scan086 | Tests to eliminate engine pulsations on a 4-Goshawk-11 model by using rubber pads and disconnecting the steering support tube. | ||
| View original record | To R. from Hs. c. to CJ. c. to E. c. to Da. c. to BY. X634 Hs2/LG21.9.22. 4-GOSHAWK-11 - ENGINE PULSATIONS X.4264. X.634. We have been carrying out tests in connection with the pulsation period which… | ||
| Scan087 | Modifications to car 107-MG to resolve vibration complaints on the 40/50 chassis. | ||
| View original record | X634 BJ21/H21.7.22. To Hs. from BJ. Copies to H. OJ. Wor. DY. BP. Br. PN. [Stamp: RECEIVED (mirrored)] Complaints of Vibrations on 40/50 Chassis. With further reference to my memo. BJ13/H20.7.22, I… | ||
| Scan088 | Complaints of vibration from the 40/50 chassis, comparing open and closed car models and the effects of compression and axle ratios. | ||
| View original record | X634 To BJ. from Hs. c. to R. c. to CJ. c. to Wor. c. to BY c. to EF. c. to PN. c. to Br. Hs1/LG22.7.22. COMPLAINTS OF VIBRATION FROM 40/50 CHASSIS. X.4299. X.196 X.634 BJ13/H20.7.22. The reason we… | ||
| Scan089 | The suitability of the 14-tooth axle versus the 18-tooth axle, and a decision on despatching cars with improved fan belts. | ||
| View original record | contd:- -2- was typical on the pre war cars. We have the impression at the Works that the 14-tooth axle for light open cars, is wrong. The disadvantages may not be apparent with a new car but when the… | ||
| Scan090 | Requesting an investigation into the harshness and vibration at the front of the 40/50 model. | ||
| View original record | To Hs. from R. c. to CJ. & BJ. X634 R1/M22. 7.22. X.3461 X.634 X.2628. The harshness and vibration of the front of the 40/50 may be influenced by the condition of the front springs and shock… | ||
| Scan091 | Vibration complaints on the 40/50 chassis, specifically concerning axle ratios, engine compression for closed cars, and fan belts. | ||
| View original record | To Hs. from BJ. Copy to OJ. Woi. Bl. PN. Lr. X634 BJ3/H24.7.22. COMPLAINTSOOF VIBRATION FROM 40/50 CHASSIS. Thank you for Hsl/LG22.7.22, which is very helpful to us. Closed Car Vibrations. So far the… | ||
| Scan092 | Inquiring about the results of tests on 14-tooth axles, compression, and vibration at Brooklands. | ||
| View original record | X634 S/W Hs. C13/C3.8.22. Re 14-tooth axles, compression and vibration etc. X.4299 X.634 X.788. This matter was again discussed at the Sales Conference on Tuesday, but we are awaiting the result of… | ||
| Scan093 | Vibrations on the 40/50 model at 20 M.P.H. | ||
| View original record | Hs. c. to BY. c. to Wor. c. to E. c to BJ. c. to PN. X634 EP9/H2.10.22. re. VIBRATIONS ON 40/50 AT 20 M.P.H. X634 With reference to the above, which I understand is now having your attention… | ||
| Scan094 | Following a production engineers' visit discussing issues with body vibrations and material choices for the Goshawk chassis. | ||
| View original record | To BJ. from R. c. to CJ. LHS. c. to BY. Wor. c. to Hs. EP. c to E. Da. X634 RB/M19.1.23. RE. PRODUCTION ENGINEERS VISIT TO W.W. ON 16.1.23 X.3730. X.634 Wor. BY. and EP. were here on a visit on the… | ||
| Scan095 | Method of attaching the dashboard to the scuttle and comparing it to a competitor's design. | ||
| View original record | contd:- -2- body runners, and the frame brackets, and under the nuts and plates of the bolts, and under the head of the bolts. This is exactly the same scheme as we have long used for the attachment… | ||
| Scan096 | Inquiry to Messrs. Elliott Bros. regarding instruments for measuring the intensity of vibrations on a car engine. | ||
| View original record | X634 Hs/Rn2/LG. 12th. April 1923. Messrs. Elliott Bros., 1 Central Buildings, Westminster, London, S.W.1. Dear Sirs, Do you produce any type of Instrument for measuring the intensity of vibrations,… | ||
| Scan097 | Letter of inquiry to Cambridge & Paul Instr: Co. regarding an instrument for measuring vibrations in a car engine. | ||
| View original record | X634 Hs/Rml/LG. 12th. April 1923. Messrs.Cambridge & Paul Instr:Co., Cambridge. Dear Sirs, Do you produce any type of Instrument for measuring the intensity of vibrations, which could be used with… | ||
| Scan098 | Letter from Elliott Brothers (London) Ltd. stating they do not make instruments for measuring vibrations. | ||
| View original record | X634 CONTRACTORS TO THE BRITISH AND FOREIGN GOVERNMENTS. BY APPOINTMENT TO HIS LATE MAJESTY KING EDWARD VII. ELLIOTT BROTHERS (LONDON) LTD. Established 1800. ELECTRICAL & MECHANICAL ENGINEERS.… | ||
| Scan099 | Letter from The Cambridge and Paul Instrument Company describing a newly developed vibration recorder. | ||
| View original record | X634 TELEGRAMS: INSTRUMENT, CAMBRIDGE. CODES: A.B.C. (5TH AND 6TH EDITIONS); WESTERN UNION; BENTLEY'S. TELEPHONE: CAMBRIDGE No. 615. THE CAMBRIDGE AND PAUL INSTRUMENT COMPANY, LIMITED, INCORPORATING… | ||
| Scan100 | Continuation of a letter from The Cambridge and Paul Instrument Company regarding vibration records and instrument pricing. | ||
| View original record | Continuation Sheet No......... THE CAMBRIDGE AND PAUL INSTRUMENT COMPANY, LIMITED. Messrs. Rolls-Royce Ltd., (Continued). -------------------- enlargements enclosed the vibrations of small amplitude… | ||
| Scan101 | Photograph of a Dobbie McInnes mechanical indicator or testing apparatus. | ||
| View original record | DOBBIE McINNES GLASGOW | ||
| Scan102 | Two negative prints of oscillograph traces comparing different levels of vibration. | ||
| View original record | [Illegible text on film strip] | ||
| Scan103 | Vibrograph film recordings showing vibration patterns. | ||
| View original record | VIBROGRAPH | ||
| Scan104 | Letter inquiring about the practical applications and capabilities of a vibration recorder for internal combustion engines. | ||
| View original record | X634 Hs/Rnl/LG. 18th. May 1923. The Cambridge & Paull Instr. Co.Ltd., Cambridge, England. Dear Sirs, We thank you for your letter of the 16th.inst. with enclosed photograph etc. We are interested in… | ||
| Scan105 | The second page of a letter discussing a demonstration of performance. | ||
| View original record | Sheet 2. We feel that for you to come down and demonstrate its performance to us, until we have more information on the subject, would probably be unsatisfactory to both parties. Yours faithfully, | ||
| Scan106 | Test report on methods for damping camshaft vibrations by modifying the engine suspension. | ||
| View original record | To Hs. from GF. X634 6.7.23. TESTS FOR CAMSHAFT VIBRATIONS. X3423 [crossed out] X634 Rubber blocks were jambed between frame and brakes links of engine suspension with the object of damping out… | ||
| Scan107 | Road test results for crankshaft vibrations on a 49-GB car. | ||
| View original record | X.634 CRANK SHAFT VIBRATIONS. 49-GB CAR. ROAD TESTS. On accelerating from 4 m.p.h. with throttle full open, vibration periods develop at the following speeds:- 8 to 11 m.p.h. 15 to 22 m.p.h. 29 to 42… | ||
| Scan108 | Letter from The Cambridge and Paul Instrument Company regarding sending a representative with a Vibrograph to test a gearbox. | ||
| View original record | TELEGRAMS: INSTRUMENT, CAMBRIDGE. CODES: A.B.C. (5TH AND 6TH EDITIONS). WESTERN UNION; BENTLEY'S. TELEPHONE: CAMBRIDGE No. 615. THE CAMBRIDGE AND PAUL INSTRUMENT COMPANY, LIMITED, INCORPORATING THE… | ||
| Scan109 | Letter from The Cambridge and Paul Instrument Company regarding a misdirected letter. | ||
| View original record | TELEGRAMS: INSTRUMENT, CAMBRIDGE. CODES: A.B.C. (5TH AND 6TH EDITIONS); WESTERN UNION; BENTLEY'S. TELEPHONE: CAMBRIDGE No. 615. THE CAMBRIDGE AND PAUL INSTRUMENT COMPANY, LIMITED, INCORPORATING THE… | ||
| Scan110 | Letter to Cambridge & Paul Instrument Co. Ltd. regarding a misdirected letter found in their envelope. | ||
| View original record | COPY. D/ROE17/CTS.1.24. January 9th. 1924. Messrs. Cambridge & Paul Instrument Co. Ltd., CAMBRIDGE. Dear Sirs, Will you kindly note that in the attached envelope received from you this morning, we… | ||
| Scan111 | Confirming a visit from a Cambridge & Paul Instrument Company representative for a gearbox trial. | ||
| View original record | [Handwritten]: XG34 Wor from ROY. c. to RV [crossed out] c. to Hs. ---------------- ROY11/MG11.1.24 ---------------- Attached is copy of a communication from the Cambridge & Paul Instrument Company… | ||
| Scan112 | Letter from The Cambridge and Paul Instrument Company regarding a visit with a Vibrograph to test a gearbox. | ||
| View original record | Copy of Letter ----------------- From: THE CAMBRIDGE AND PAUL INSTRUMENT COMPANY LIMITED. ROY9/AG2.1.24 WGC/MTS CAMBRIDGE. January 8th.1924. Dear Sirs:- Vibrograph ---------- In reply to your letter… | ||
| Scan113 | Visit of representatives from the Cambridge & Paul Instrument Company, with a handwritten follow-up note on their arrival. | ||
| View original record | X634 Hs. from ROY. ROY6/MG1/2/24 I am expecting Mr. Stallan, of The Cambridge & Paul Instrument Company, here on Tuesday with his Vibrograph, and Mr. Collins, their Director and Manager, on Wednesday.… | ||
| Scan114 | Torsional vibration in the gearbox coupling and proposing a simpler, stiffer design. | ||
| View original record | V6324 S E C R E T. To Mr. Stent. Mr. Elliott. } FROM R. R4/M9.2.24. EAC.1V - COUPLING TO GEARBOX. X.4604 X.9320 X.634 Naturally flexibility between the flywheel and gearbox may permit of a period of… | ||
| Scan115 | Secret memo detailing the causes and potential solutions for over-run vibration in an E.A.C. engine. | ||
| View original record | X634 S E C R E T. To HS. RG. } FROM R. E. DA. R2/M9.2.24 E. A. C. ENGINE. OVER-RUN VIBRATION. X.9550. X.634 The source of this trouble I believe must be the variation of the kinetic energy in the… | ||
| Scan116 | Investigating retard vibrations related to the torsional period of the driveshaft. | ||
| View original record | R.R. 402A (40 H) (SL 42 12-7-23). J.H., D. 76324 EXPERIMENTAL REPORT. Expl. No. 9770 634 REF: Hs2/LC16.2.24. To R. from Hs. c. to CJ. RG. c. to E. Wor. c. to DA. BY. SECRET. EAC. ENGINE. Retard… | ||
| Scan117 | Testing a disc crankshaft for a 20 HP engine. | ||
| View original record | H.R. 493A (40 H) (SL 42 12-7-23). J.H. D. EXPERIMENTAL REPORT. Expl. No. 4221 634 4604 REF: Hs2/LG20.2.24. To R. from Hs. c. to CJ. RG. c. to E. BY. c. to DA. PN. DISC CRANKSHAFT FOR 20 HP. We have… | ||
| Scan118 | Continuation page recommending the fitting of a damped spring drive. | ||
| View original record | contd:- -2- under full power at all speeds. We should expect the effect of this to be overcome by fitting a damped spring drive. Hs. [Watermark: DICKINSON BOND] | ||
| Scan119 | Tests to reduce retard vibration on the EAC car. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. x634 Expl. No. x9550 x634 REF: Hs2/LG27.2.34. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. RG. c. to E. DA. c. to BY. WOR. S E C R E T. E. A. C. Retard… | ||
| Scan120 | Overrun vibration on the E.A.C. engine and the fitting of Hawk connecting rods. | ||
| View original record | R.R. 493A (40 H) (SL 12 12-7-23). J.H., D. EXPERIMENTAL REPORT. 4634 Expl. No. 9550 634 REF: Hs3/LG10.3.24. To R. from Hs. c. to CJ. RG. c. to E. DA. c. to BY. WOR. S E C R E T. OVERRUN VIBRATION ON… | ||
| Scan121 | Engine vibration issue in a Goshawk 11 vehicle at high speed. | ||
| View original record | X634 To Hs. from R. c. to CJ. RE. GOSHAWK 11. VIBRATION. X.4604 X.634 When driving 5-G-11 to the Fen Country there seemed to be a number of occasions, such as on the down grade dips in the roads, when… | ||
| Scan122 | Specifications for items on the 93-NK car, including the starter motor, gearbox, and steering. | ||
| View original record | X634 To Wor. from Hs. Hsl/LG31.10.24. With reference to CJ5/E30.10.24. 48770 X634 Item No.2. The starter motor on lower half, new connecting rods and new pistons will be fitted to 93-NK car. Automatic… | ||
| Scan123 | Plans and anticipated issues for car models EAC.11 and 93-NK. | ||
| View original record | contd :- -2- for the sub-frame. It will be pushed forward with all speed and we are hoping to have a completed EAC.11. car ready by Christmas, fitted with a covered body. This matter was discussed… | ||
| Scan124 | Engine vibrations and comparisons between different car models. | ||
| View original record | Contd :- -3- attention can be given to the quality of running. As we have pointed out, we could quickly complete a duplicate of 93-NK car if it is approved of. Vibrations. Hs. wishes to point out that… | ||
| Scan125 | Page explaining the reason for fitting high compression pistons to car 93-NK. | ||
| View original record | contd :- -4- than that car. The reason why 93-NK had high compression pistons fitted was because it was a definite instruction from R. as he wished to try them. Hs. | ||
| Scan126 | Engine vibration issues in car 46-PK and the final EAC.11 engine design. | ||
| View original record | SECRET. X6324 To Hs. From CJ. CJS/E3.11.24. X634 X8770 Referring to 93-NK, according to present arrangements, R. leaves for Le Canadel on the 15th. Dec. When in July BJ. drove 46-PK with a Works… | ||
| Scan127 | Secret memo discussing engine vibrations in the EAC.11 model and a related policy change for its intended use. | ||
| View original record | X634 To CJ. from Hs. S E C R E T. Hs2/LG4.11.24. EAC.11. VIBRATIONS. X634 X8770 We were certainly under the impression that the Sales critics were satisfied with 46-PK car as regards engine… | ||
| Scan128 | Brochure for the K.B.B. Vibrometer used for the detection and investigation of vibration in machinery. | ||
| View original record | KELVIN BOTTOMLEY & BAIRD LTD. KBB GLASGOW & LONDON X634 THE K.B.B. VIBROMETER. FIG. 1. The K.B.B. VIBROMETER provides a ready means for the detection and investigation of vibration, especially in… | ||
| Scan129 | Issues with a disc crankshaft design, focusing on bearing wear and vibrations in a 20 HP car. | ||
| View original record | To R. from Hs. c. to CJ. BJ. c. to RG. BJ c. to DA. BY. c. to Wor. X6324 20 HP. +4221 Hs6/LG26.11.24. We propose bringing to WW. (with 93-NK car), 7-G-11. The unit in this car is fitted with the disc… | ||
| Scan130 | Communication about sending a blueprint for a modified, stiffer crankshaft. | ||
| View original record | contd :- -2- any signs of distress. We are sending to E. a blue print of the crankshaft fitted to that car. It is the stiffer crankshaft which includes - stiffer webs and journals. The pins have been… | ||
| Scan131 | Test report on engine vibrations without a slipper wheel for a 48-PK car with a standard 40/50 engine. | ||
| View original record | X634 17.12.24. 48-PK CAR. X3056 STANDARD 40/50 ENGINE. Engine vibrations without slipper wheel. Top direct. M.P.H. M.P.H. 29 to 31 Retard vibrations. 35 " 36 rough 60 to 50 42 " 43 very smooth from 50… | ||
| Scan132 | Paper from Mr. Whipple of Cambridge Instrument Company regarding a Vibrograph and Torsion meter. | ||
| View original record | Rg. from ROY. o. to RY. c. to Fs. c. to BFG ---------------- ROY12/AG15.5.25. ---------------- Attached is copy of a Paper ready by Mr. Whipple, of the Cambridge Instrument Company (the only copy I… | ||
| Scan133 | High-speed engine vibrations, termed 'engine sting', found in the 'New Phantom' chassis. | ||
| View original record | S/W(Hs) X634 S/M (NOR) copy to BJ. PN. EP. Hs. Hx. CNB14/LH3.10.25. "NEW PHANTOM" CHASSIS - HIGH SPEED ENGINE VIBRATIONS. With reference to the high speed engine vibration which had been specially… | ||
| Scan134 | Elimination of noise in machinery, following up on an interview with Standard Telephones & Cables Ltd. | ||
| View original record | To: Hs. X684 PN10/HW/16.8.26. re ELIMINATION OF NOISE IN MACHINERY. I recently had an interview with a representative of Messrs. Standard Telephones & Cables Ltd., and now enclose herewith a letter… | ||
| Scan135 | Test drive report for car 12-EX detailing feedback on steering, ignition timing, suspension, and engine vibration. | ||
| View original record | To Hs. from R. c. to BJ. c. to Wor. c. to By. X634 RL/M22.7.26. 12-EX. X.7940. X.7430. X.634. X.7685. I drove 12-EX to London, and thought, while the steering was extremely light and easy, it may be… | ||
| Scan136 | Letter from Standard Telephones and Cables Limited discussing a device for the elimination of noise in machinery. | ||
| View original record | Standard Telephones and Cables Limited FORMERLY Western Electric Company Limited. BRANCH OFFICES AND STORES: BIRMINGHAM: 14, LIVERY STREET. CARDIFF: 39, PARK PLACE. GLASGOW: 49, WEST CAMPBELL STREET.… | ||
| Scan137 | Page two of a letter from Standard Telephones & Cables Limited regarding securing rights for an invention. | ||
| View original record | - 2 - ROLLS-ROYCE, LIMITED. 13-8-26. The foregoing notes should be sufficient to indicate the nature of our invention, and we shall be very glad to hear in due course whether you contemplate adopting… | ||
| Scan138 | Proposing a visit to discuss tests investigating high-speed vibration on a 20 HP engine. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to RG. E. c. to DA. EY. X634 VISIT TO WW. X1698 Hs1/LG2. 9.26. We propose visiting WW. on Tuesday next the 7th. unless we hear from you that it is not convenient. We… | ||
| Scan139 | Experiments comparing crankshaft vibrations between the Phantom and 20 HP engines. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to RG. E. c. to DA. BY. c. to OY. X634 Hs/ACL1/LG20.9.26. PHANTOM AND 20 HP. CRANKSHAFT VIBRATIONS. X8010 Y5010 We have carried out further experiments in… | ||
| Scan140 | Experiments to reduce crankshaft vibrations by adjusting damping torque and friction on slipper wheels. | ||
| View original record | contd :- -2- The slipper wheels were replaced with a normal damping torque of 315 lbs.ins. which, although smoothing out the lower speed vibrations, seemed to have little or no effect on the one at… | ||
| Scan141 | Analysis of engine vibrations and friction torque from preliminary tests on the Phantom model. | ||
| View original record | contd :- -3- figures because with the high unit pressures necessary on the slipping surfaces, the friction torque became extremely erratic and was particularly susceptible to changes of temperature… | ||
| Scan142 | Report page detailing experiments on engine vibrations and the effects of damping friction on the 20 HP model. | ||
| View original record | contd :- -4- (4) Vibrations due to the lower harmonics of the gas pressures are evident under load at about 1580 and 1105 r.p.m. and heavy damping friction intensifies them. (5) The amplitude of the… | ||
| Scan143 | Tests on engine vibration, focusing on damping friction and the effect of piston position and weight. | ||
| View original record | contd :- -5- which vibration was then at a max. but less severe than at 3300 RPM. (5) The damping friction used in case (3) (200 to 300 lbs.ins.) seemed too high to effectively damp out the vibrations… | ||
| Scan144 | Crankshaft vibration testing, comparing a stiffer crankshaft to a standard one and detailing future tests. | ||
| View original record | contd : -6- We expected a larger reduction than this and think that perhaps removing the tops of the pistons does not give an accurate com-parison with respect [illegible] to the weight effect because… | ||
| Scan145 | Goshawk III crankshaft torsional vibration diagrams without damper wheels. | ||
| View original record | 1) STANDARD CRANKSHAFT. 3100 R.P.M. STD. PISTONS WITH HEAD (CYL) REMOVED. 3 OSCns PER REV. AMPLITUDE 8 3/4° 2) 12% STIFFER CRANKSHAFT. 3370 R.P.M. DIAGM. WITH ENGINE RUNNING UNDER POWER LIGHT LOAD.… | ||
| Scan146 | Page stamped by the Print Room in Derby. | ||
| View original record | ROLLS-ROYCE LIMITED. PRINT ROOM 20 SEP. 1926 DERBY. | ||
| Scan147 | Experiments to determine the torsional deflection and rigidity of a Phantom crankshaft. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to RG. E. c. to DA. BY. c. to OY. X6324 Hs/ACLl/LG23.9.26. PHANTOM - CRANKSHAFT VIBRATIONS. X6324 X8010 X9840 In connection with the Phantom crankshaft vibration… | ||
| Scan148 | Calculation sheet page detailing the weight and polar moment of inertia for various engine components and discussing oscillation and nodal points. | ||
| View original record | contd :- -2- PART. | WEIGHT. lbs. | POLAR MOMENT OF INERTIA. W/g K^2 -------------------------------------------------------------------------------------------- Crankshaft complete - | 75.875 |… | ||
| Scan149 | Engine vibration, critical speed calculations, and crankshaft performance for the Phantom and 20 HP models. | ||
| View original record | contd :- -3- Working this out on the lines given in our first report we find that the free period would be 158 oscillations per second or 9480 oscillations per minutes. We know from the 20 HP. results… | ||
| Scan150 | Graph plotting the torsional deflection of a standard Phantom crankshaft against applied torque. | ||
| View original record | TORSIONAL DEFLECTION OF STD. PHANTOM CRANKSHAFT., CRANKSHAFT SUPPORTED IN THE BEARINGS IN CRANKCASE., ANGLE OF TWIST IN RADIANS, TORQUE lbs.ft., .030, 1½°, .025, .020, 1°, .015, ½°, .010, .005, DOWN… | ||
| Scan151 | Vibration issues and general road test feedback for car 12-EX. | ||
| View original record | To Hs. from R. c. to BJ. BY. c. to Wor. CWB. c. to PN. 4634 R1/ML.10.26. 12-EX - VIBRATION ETC. X.634 X.8010 X.7010 X.7300 29th.ult, this car appeared to be in good condition after its 10,000 miles,… | ||
| Scan152 | Follow-up memo regarding the elimination of noise in machinery. | ||
| View original record | S/W. To Hs. X634 PN3/EH.4.10.26. ELIMINATION OF NOISE IN MACHINERY. Referring to my memo to you of August 16th, re the elimination of noise in machinery, I shall be glad if you will kindly let me hear… | ||
| Scan153 | Patent for noise elimination, suggesting collaboration with Dunlop on tyre noises. | ||
| View original record | X634 To PN. from Hs. Hs7/LG5.10.26. ELIMINATION OF NOISE. PN3/EH4.10.26. X4050 With reference to your memo. of Aug. 16th. It has been difficult for us to find an application for this patent on our… | ||
| Scan154 | Letter to Major B.C. Carter of the Air Ministry acknowledging his comments on document E.3039A. | ||
| View original record | c. Hs. 4634 Rg2/LW. Your ref. 632745/25/R.D.2.R. 1st November 1926 Major B.C. Carter, AIR MINISTRY, Adastral House, Kingsway, LONDON, W.C.2. Dear Carter, Many thanks for your letter of the 28th… | ||
| Scan155 | Analysing a competitor's vehicle, the 20 HP Lorraine Deitritch. | ||
| View original record | To BJ. To Hs/Rm. from R. c. to Wor. PN. Hm. c. to CWB. EP. c. to Mr. Minchin. R1/M2.11.26. 20 HP. LORRAINE DEITRITCH X.3588 X.634 I thought this might be a very definite competitor, and from reports… | ||
| Scan156 | Letter to Major B. C. Carter of the Air Ministry regarding a report on Crankshaft Torsional Vibration tests. | ||
| View original record | X634 X8010 Expl: Dept: Hs/RnS/LG. 4th. Nov. 1926. Major B. C. Carter, AIR MINISTRY, Adastral House, Kingsway, London W.C.2. Dear Major Carter, We are sending you a report on Crankshaft Torsional… | ||
| Scan157 | Torsional deflection and polar moment of inertia experiments for the Phantom crankshaft. | ||
| View original record | COPY. PHANTOM - CRANKSHAFT VIBRATIONS. In connection with the Phantom crankshaft vibrations experiments, we have taken a torsional deflection curve of this crankshaft supported in its bearings in the… | ||
| Scan158 | Analysis of crankshaft oscillation, nodal points, and critical speeds in different engine models. | ||
| View original record | CONTD :- -2- Having determined the stiffness of the shaft and the inertia of the parts, we were able to estimate the fundamental or free period of oscillation of the system, also the position of the… | ||
| Scan159 | Requesting Mean Effective Pressure and valve spring details for 20 HP and 40/50 engines. | ||
| View original record | To E. from R To Hs. c. to BJ. Wor. By. +634 RL/M8.11.26. 20 HP. AND 40/50 ENGINES. X.8771 X.634 X.5771 X.8010 X.8060 Letter MEP. needed for the above - maximum HP. just under master crankshaft period,… | ||
| Scan160 | The limitations on increasing Mean Effective Pressure (MEP) due to engine detonation and reaction vibrations. | ||
| View original record | To Hs. E. from R. c. to BJ. Wor. BY. 4634 R2/M9.11.26. BETTER MEP. AT ALL SPEEDS UP TO 3000 RPM. X. 8771 AND 4 1/2 COMPRESSION RATIO. X.634 X. 3005 This cannot be increased because of detonations and… | ||
| Scan161 | Experiments to reduce torsional vibrations on the 20 HP and Phantom engines by modifying the flywheel mounting. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to RG. E. c. to DA. EY. c. to GY. [Handwritten] 1634 Hs/ACL1/LG9.11.26. TORSIONAL VIBRATIONS ON 20 HP. & PHANTOM. [Handwritten] X8010 Further tests have been made… | ||
| Scan162 | Analysis of crankshaft vibration, critical speed, and damping effects of a non-rigid flywheel. | ||
| View original record | contd :- -2- resisting motion relative to the crankshaft was varied between 400 and 2000 lbs.ins. and vibration diagrams recorded between these values. Within these limits it was found that the… | ||
| Scan163 | Page of a report discussing crankshaft resonance, flywheel friction effects, and torsional vibrations related to the Phantom model engine. | ||
| View original record | contd :- -3- free on the crankshaft. We have calculated that this assumed higher resonant speed would be at 6580 r.p.m. The system considered being the crankshaft unit without the flywheel and the… | ||
| Scan164 | Analysis of engine vibration, comparing the crankshaft rigidity and damping characteristics of the 20 HP and Phantom engines. | ||
| View original record | contd :- -4- resonance as indicated by the three crests on the diagram. The same diagram reduced to a flat base is given as a comparison with the 20 HP. and we see that the amplitude is less than with… | ||
| Scan165 | Analysis of viscous-friction and centrifugal dampers for reducing engine vibrations and harmonics. | ||
| View original record | contd :- -5- that the critical amplitude is less than the 20 HP. but the lower vibrations - or harmonics - are correspondingly less severe and on the engine investigated we failed to get a diagram… | ||
| Scan166 | Conclusion of an investigation into crankshafts, finding the method reliable and in agreement with practice observations. | ||
| View original record | contd :- -6- crankshafts with the influence of various factors on the same. In both the cases investigated we have found the method to be quite reliable and in close agreement with our practice… | ||
| Scan167 | Diagram showing experiments on the friction mounting of a flywheel to a 20 HP crankshaft. | ||
| View original record | FLYWHEEL WITH CLUTCH REMOVED BAKELITE WASHERS. CLAMPING BOLTS CRANKSHAFT SLOTS ARE CUT IN FLYWHEEL FOR BOLTS ALLOWING 5° FREE MOVEMENT. RUBBER BUFFERS ARE PLACED IN THE SLOTS TO STOP THRASHING AGAINST… | ||
| Scan168 | Reverse side of a document showing a Print Room stamp from Derby. | ||
| View original record | ROLLS ROYCE LIMITED PRINT ROOM -9 NOV. 1926 DERBY. | ||
| Scan169 | Graph comparing torsional vibration amplitudes of the Goshawk and Phantom engines at critical speed. | ||
| View original record | TORSIONAL VIBRATIONS. COMPARISON OF VIBRATION AMPLITUDES AT THE CRITICAL SPEED ON PHANTOM & 20 H.P. WITHOUT ANY EXTERNAL DAMPING. PLAIN LINE GOSHAWK DOTTED LINE PHANTOM AMPLITUDE OF VIBRATION DEGREES.… | ||
| Scan170 | Graph of torsional vibrations, showing the reduction in amplitude with a decrease in the frictional mounting of the flywheel. | ||
| View original record | TORSIONAL VIBRATIONS CURVES SHOWING REDUCTION IN AMLITUDE OF VIBRATIONS WITH DECREASE IN THE FRICTIONAL MOUNTING OF THE FLYWHEEL AMPLITUDE OF VIBRATION DEGREES CRANK ANGLE DEGREES NON-RIGID FLYWHEEL… | ||
| Scan171 | Polar diagram comparing the crankshaft oscillations of the 20-HP and Phantom models at the speed of resonance. | ||
| View original record | 20.H.P VIBRATION PHANTOM VIBRATION POLAR DIAGRAMS OF 20-H.P. & PHANTOM CRANKSHAFT OSCILLATIONS AT THE SPEED OF RESONANCE. | ||
| Scan172 | Letter from the Air Ministry regarding a report on the 40/50 HP engine and another paper. | ||
| View original record | X6324 AIR MINISTRY, ADASTRAL HOUSE, KINGSWAY, W.C.2. Your Reference:- Hs/Rm6/LG. 9th November, 1926. X8010 Dear Mr. Robotham, Many thanks for your letter of the 4th instant enclosing a report of tests… | ||
| Scan173 | Request for a description of how the 'Harmonic Balancer' on Oakland and Buick cars functions. | ||
| View original record | To OY. from Hs. X634 Hsl/LG11.11.26. Could you kindly obtain for us a technical description of exactly how and why the 'Harmonic Balancer' fitted to the Oakland and Buick cars, functions. Hs. | ||
| Scan174 | Cover memo for a report on Torsional Vibration. | ||
| View original record | X6324 To E. from Hs. Hsl/T11.11.26. X8020 Herewith report on Torsional Vibration which we promised you. Hs. | ||
| Scan175 | Experiments to reduce crankshaft torsional vibrations in 20 HP and Phantom engines using a non-rigidly mounted flywheel. | ||
| View original record | Copy sent to R.A.E. & Major Carter Air Ministry COPY. X634 9.11.26. TORSIONAL VIBRATIONS ON 20 HP. AND PHANTOM ENGINES. Further tests have been made on the 20 HP. engine in connection with the… | ||
| Scan176 | Flywheel and torsional vibration experiments, including analysis of the Phantom model. | ||
| View original record | contd :- -2- amplitude of the high speed vibration decreased, while that at the lower speed increased until the damping became virtually infinite - or the slipper wheels became solid - when the entire… | ||
| Scan177 | Engine vibration, damping, and damper design, comparing the Phantom and 20 HP models. | ||
| View original record | contd :- -3- the influence this normally exerts does not enter into the question as to the reason for the vibration on the larger engine being less severe than on the 20 HP. Now the rigidity of the… | ||
| Scan178 | Page describing a method for estimating the resonant speeds of six-cylinder crankshafts. | ||
| View original record | contd :- -4- We are preparing some notes on the method we employ for estimating the resonant speeds of six cylinder crankshafts with the influence of various factors on the same. In both cases… | ||
| Scan179 | Letter from the American office to Derby discussing crankshaft vibrations and Mobiloil A tests. | ||
| View original record | ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. X634 Oy1-E-111326 November 13th, 1926. Mr. E. W. Hives, Rolls-Royce, Ltd., Derby, England. Dear Mr. Hives: Re Crankshaft Vibrations Many thanks for the… | ||
| Scan180 | Covering memo forwarding a copy of a letter addressed to Major Carter and Mr. Lovesey's reply. | ||
| View original record | Hs. X634 Rg10/LW.23. 11. 26 We are sending you herewith a copy of letter addressed to Major Carter, together with copy of Mr. Lovesey's reply to Major Carter's queries. Rg. [Stamp] RECEIVED Hs NOV 24… | ||
| Scan181 | Cover letter to Major B.C. Carter of the Air Ministry, forwarding an attached note written by Mr. Lovesey. | ||
| View original record | COPY. Rg9/LW. Your ref. 632745/25/R.D.E.1 23rd November 1926 Major B.C. Carter, AIR MINISTRY, Adastral House, Kingsway, LONDON, W.C.2. Dear Major Carter, Mr. Lovesey has kindly written the attached… | ||
| Scan182 | Letter responding to Major Carter's query about running six-cylinder car engines without a damper. | ||
| View original record | 22. 11. 26 With reference to the question asked in Major Carter's letter, we regret we have no experience of running either of our six cylinder car engines for any considerable periods near the main… | ||
| Scan183 | Internal engine damping, vibration experiments, and a potential visit from Major Carter. | ||
| View original record | (2) without the use of a damper in each case. It seems that the internal damping is much greater in the case of the larger engine, and we wonder if Major Carter has any information on the factors… | ||
| Scan184 | Request for information on crankshaft vibrations from General Motors. | ||
| View original record | To CWB. from Hs. X634 Hsl/LG24.11.26. CRANKSHAFT VIBRATIONS. X634 / X.8010 Attached herewith is the sort of information we would like from General Motors. We should be obliged if you could obtain this… | ||
| Scan185 | Letter to General Motors Ltd. requesting information on their torsional vibration damper technology. | ||
| View original record | C O P Y. 22.11.26. Letter to General Motors Ltd. :- CRANKSHAFT TORSIONAL VIBRATIONS. We are interested, from a technical point of view, in the torsional vibration damper recently adopted by you on… | ||
| Scan186 | Series of questions regarding the theory and effectiveness of damper action on engine vibrations. | ||
| View original record | contd :- -2- Assuming the main critical vibration without the damper to occur within the speed range of the engine, does the damper effectively eliminate the 'master' vibration, if so, is this… | ||
| Scan187 | Test results of a Packard Straight 8 car and its comparison to the company's 6-cylinder engines. | ||
| View original record | To BJ. from R. c. to Wor. BY. c. to Hs. EP. X634 R4/M25.11.26. RE. PACKARD STRAIGHT 8. X.435 X.634 The test of the above car yesterday confirms some of our views. With the 8 cyl. in line scheme an… | ||
| Scan188 | Letter from the Air Ministry discussing engine damping, torque variation, and resonance in response to a note from Mr. Lovesey. | ||
| View original record | TEL. No. HOLBORN 3434. Any communications on the subject of this letter should be addressed to :- THE SECRETARY, AIR MINISTRY, ADRASTAL HOUSE, KINGSWAY, LONDON, W.C.2. and the following number… | ||
| Scan189 | Letter discussing the characteristics of a friction damper in a six-crank engine and enclosing related notes. | ||
| View original record | (3) A statement is made that the friction damper shews the characteristics of being elastically connected. I think this is because the engine has six cranks and in consequence my investigations can… | ||
| Scan190 | The 'Summers Vibration Damper' and arranging a meeting with a General Motors representative for a full explanation. | ||
| View original record | S/W. Hs. V624 CWB4/GM/2-12-26. SUMMERS VIBRATION DAMPER. I understand this is the name of the torsional vibration damper fitted to the Buick cars. I have written to America, as suggested, for the… | ||
| Scan191 | Meeting to discuss the theory of the Summers Vibration Damper. | ||
| View original record | To CWB. from Hs. X634 Hs4/LG3.12.26. SUMMERS VIBRATION DAMPER. With reference to CWB4/GM2.12.26. We shall be very pleased to see Mr. W.O.Kennington. We think however we should point out to him that at… | ||
| Scan192 | Arranging travel for Mr. Kennington to Derby regarding the Summers Vibration Damper. | ||
| View original record | S/W. Hs. X634 CWB3/GM/8-12-26. SUMMERS VIBRATION DAMPER. I have now arranged with Mr. Kennington to come up to Derby on Friday of this week. We shall leave by the 8-25 from London. Would you please… | ||
| Scan193 | Letter to E. W. Hives regarding a Harmonic Balancer, enclosing a letter from General Motors. | ||
| View original record | ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. X634 Oy2-E-12926 December 9, 1926. Mr. E. W. Hives, Rolls-Royce, Ltd., Derby, England. Re Harmonic Balancer Dear Mr. Hives: We are enclosing herewith… | ||
| Scan194 | Letter from General Motors to Rolls-Royce of America regarding a request for information on a harmonic balancer. | ||
| View original record | GENERAL MOTORS CORPORATION 224 West 57th Street New York December 6, 1926. Mr. Maurice Olley, Rolls-Royce of America, Inc., Springfield, Mass. Dear Mr. Olley: I received your letter of November 27th… | ||
| Scan195 | Series of questions regarding the operation and effects of a harmonic balancer. | ||
| View original record | RE. HARMONIC BALANCER. (1) Assuming that a case of resonance exists within the working speed range of the crankshaft without the balancer, will the addition of this balancer completely eliminate the… | ||
| Scan196 | Letter from consulting engineer W.O. Kennington to E. Hives discussing a visit to Derby, Mr. Carter's work, and crankshaft dampers. | ||
| View original record | X634 W. O. KENNINGTON. CONSULTING ENGINEER. 111, GROSVENOR ROAD, LONDON, S.W.1. ENG. TELEPHONE, VICTORIA 5707. 16th. December.1926. E. Hives, Esq., Messrs. Rolls-Royce, Limited, Derby. Dear Mr. Hives,… | ||
| Scan197 | The concluding page of a letter to Mr. Hives regarding vibration. | ||
| View original record | -2- - Hives, Esq. cont., 16th. December. 1926. vibration or to what extent it is removed, I shall be obliged. With kind regards, I remain, Yours faithfully, [Signature: W.O. Bentley] WOK/KG. | ||
| Scan198 | Letter to Major Carter discussing engine damping, resonance, and the 'Harmonic Balancer'. | ||
| View original record | Expl: Dept: X634 Hs/ACLl/LG. 18th. Dec. 1926 Air Ministry, Adastral House, Kingsway. London W.C.2. RAF S.W. Farnboro Dear Major Carter, We thank you for your letter of the 30th ult. with the enclosed… | ||
| Scan199 | Engine vibration, damper effectiveness, and a proposal to test a new elastically driven damper design. | ||
| View original record | contd :- -2- Conclusions drawn from your investigation indicate that an elastically driven flywheel - which in effect this instrument appears to be - would result in dividing the main vibration into… | ||
| Scan200 | Proposed tests on crankshaft stiffness, inertia, and motion using a torsiograph. | ||
| View original record | centd :- -3- first test the ratio of the stiffness of the crankshaft to the driving shaft is to equal that of the effective inertia of the crankshaft system - 1/3 the total inertia - to the damper… | ||
| Scan201 | Letter to the Air Ministry comparing engine damping characteristics and discussing 'Harmonic Balancers'. | ||
| View original record | Expl: Dept: Hs/ACL1/LG. 18th. Dec. 1926 Air Ministry, Adastral House, Kingsway London W.C.2. Dear Major Carter, We thank you for your letter of the 30th ult. with the enclosed notes A. and B. which… | ||
| Scan202 | Engine vibration, dampers, and plans for testing a new elastically driven damper design. | ||
| View original record | contd :- -2- Conclusions drawn from your investigation indicate that an elastically driven flywheel - which in effect this instrument appears to be - would result in dividing the main vibration into… | ||
| Scan203 | Proposal for testing crankshaft stiffness and damper inertia, with plans to use a torsiograph. | ||
| View original record | centd :- -3- first test the ratio of the stiffness of the crankshaft to the driving shaft is to equal that of the effective inertia of the crankshaft system - 1/3 the total inertia - to the damper… | ||
| Scan204 | Letter from consulting engineer W.O. Kennington regarding an Adex Stabiliser sample. | ||
| View original record | X634 W. O. KENNINGTON. CONSULTING ENGINEER. 111, GROSVENOR ROAD, LONDON, S.W.1. ENG. TELEPHONE, VICTORIA 5707. 20th. December.1926. E. Hives, Esq., Messrs. Rolls-Royce, Limited, Derby. Dear Mr. Hives,… | ||
| Scan205 | Letter discussing the performance of friction type dampers versus flexibly driven 'Harmonic Balancers' for eliminating torsional vibrations. | ||
| View original record | X634 Expl: Dept: Hs/ACLL/LG. 20th. Dec. 1926. 111, Grosvenor Rd., London S.W.1. Dear Mr. Kennington, We thank you for your letter of the 16th.inst. and for arranging with Mr. Summers to answer our… | ||
| Scan206 | Technical comparison of crankshaft dampers and a request for the patent specification of the 'Summers Balancer'. | ||
| View original record | contd :- -2- if it would be so effective as our own at the lower and more used speeds. No doubt each possesses specific advantages and the selection of the type of damper to give the optimum results… | ||
| Scan207 | Letter to Mr. Kennington discussing the effectiveness of different engine damper types in eliminating torsional vibrations. | ||
| View original record | 4684 Expl: Dept: Hs/ACL1/LG. 20th. Dec. 1926. 111, Grosvenor Rd., London S.W.1. Dear Mr. Kennington, We thank you for your letter of the 16th.inst. and for arranging with Mr. Summers to answer our… | ||
| Scan208 | Letter discussing the limitations of friction type engine dampers and requesting information on the 'Summers Balancer'. | ||
| View original record | contd :- -2- if it would be so effective as our own at the lower and more used speeds. No doubt each possesses specific advantages and the selection of the type of damper to give the optimum results… | ||
| Scan209 | Letter from consulting engineer W.O. Kennington to E.W. Hives acknowledging a previous letter. | ||
| View original record | W. O. KENNINGTON. CONSULTING ENGINEER. 111, GROSVENOR ROAD, LONDON, S.W.1. ENG. TELEPHONE, VICTORIA 5707. X634 22nd. December.1926. E. W. Hives, Esq. Messrs. Rolls-Royce, Limited. Derby. Dear Mr.… | ||
| Scan210 | Experiments for the Phantom front axle control, suggesting an increase in lever length. | ||
| View original record | To BY: from DA. c. to BJ: Hs. 4634 DAA/M23.12.26. PHANTOM FRONT AXLE CONTROL. X.8240 X.8420 X.7420 X.634 X.235 With reference to the experiments which have been carried out at our request to determine… | ||
| Scan211 | Recommending an employee attend a lecture on torsional crankshaft vibrations. | ||
| View original record | To WOR. from Hs. X634 Hs3/LG5.1.27. TORSIONAL CRANKSHAFT VIBRATIONS. There is a paper being read in London tomorrow on Torsional Crankshaft Vibrations by Major E.C. Carter who has made an intensive… | ||
| Scan212 | Letter concerning the Summers Vibration Damper, enclosing correspondence from America and mentioning General Motors. | ||
| View original record | S/W. Hs. X634 CWB1/GM/11-1-27. RECEIVED JAN 13 1927 SUMMERS VIBRATION DAMPER. I have now received two letters from America in reply to mine regarding the above damper and attach copies of them hereto.… | ||
| Scan213 | Extract of a letter from Henry M. Crane regarding a request for information on harmonic balancers. | ||
| View original record | GENERAL MOTORS CORPORATION. EXTRACT. of letter signed by Henry M. Crane. 6th December 1926. About a week ago I had a letter from Maurice Olley saying that your Chief Experimental Engineer, Mr. Hives,… | ||
| Scan214 | Letter to H.M. Crane discussing the working principle of a torsional vibration damper. | ||
| View original record | COPY. CWB2/GM/251126. 25th November, 1926. H.M. Crane, Esq., 40 East Fifty-fourth Street, New York, N.Y. U.S.A. Dear Crane, I am very interested from the technical point of view in the torsional… | ||
| Scan215 | The theory and effectiveness of crankshaft vibration dampers. | ||
| View original record | 2. by coil springs. It would seem therefore that the damping obtained from this device is not dependent upon the dissipation of energy by friction or by the opposition of a frictional force, as may be… | ||
| Scan216 | Letter from General Motors discussing crankshaft anti-vibration devices and torsional vibration studies. | ||
| View original record | OAKLAND MOTOR CAR DIVISION. General Motors Corporation. Pontiac, Michigan. December 15, 1926. Commander W. Briggs, Rolls-Royce, Ltd. Conduit Street. Dear Sir, I have a letter from Mr. Crane enclosing… | ||
| Scan217 | The principles and application of a harmonic balancer on a shaft. | ||
| View original record | (2) December 15, 1926. The harmonic balancer operates on the same principle of interference and is so tuned with respect to the natural frequency of the shaft assembly that when there is vibration in… | ||
| Scan218 | Letter discussing the operation of a balancer and its effect on vibration frequency. | ||
| View original record | (3) December 15, 1926. We find there is practically no difference in the operation of the balancer when equipped with leaf springs or with coil springs. The beneficial action of the balancer is not… | ||
| Scan219 | Letter from General Motors Corporation discussing harmonic balancers and engine design. | ||
| View original record | GENERAL MOTORS CORPORATION. 224 West 57th Street, NEW YORK. December 10, 1926. Commander W. Briggs, Rolls-Royce Ltd., 14-15 Conduit Street. Dear Commander: I received yours of November 25th only a few… | ||
| Scan220 | Letter from Henry M. Crane discussing engine design philosophy for low-priced cars. | ||
| View original record | (2) December 10, 1926. I think it is one of the most interesting questions today in the low priced car field as to whether it is cheaper to use the somewhat larger and slower speed engine without… | ||
| Scan221 | Instructing the Stores to despatch an ADEX Stabiliser to Mr. W.O. Kennington. | ||
| View original record | X634 To BP. from Hs/Rn. c. to Mt. Hs/Rn7/LG30.12.26. We are sending into the Stores for despatch to :- Mr. W.O. Kennington, 111 Grosvenor Rd., London S.W.1 1 ADEX Stabiliser. There is no charge.… | ||
| Scan222 | Letter to Major Carter regarding a General Motors harmonic balancer and requesting a paper on 'Torsional Vibrations'. | ||
| View original record | X634 HS3/LG Expl: Dept: 14th. Jan. 1927. R.A.E. Establishment, Farnboro', Hants. Dear Major Carter, We attach herewith letter from Mr. Summers of The General Motors Corporation in reply to a letter… | ||
| Scan223 | Crankshaft torsional vibrations, referencing General Motors' Harmonic Balancer and internal investigations on the G.1. engine. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to RG. E. c. to BY. X6384 Hs4/LG14.1.27. CRANKSHAFT TORSIONAL VIBRATIONS. X6384 X8010 We attach herewith some interesting letters from The General Motors Corporation… | ||
| Scan224 | Letter from General Motors to Rolls-Royce discussing the harmonic balancer and engine design. | ||
| View original record | COPY. GENERAL MOTORS CORPORATION, 224 WEST 57th. Street, NEW YORK. Dec. 10th, 1926. Commander W. Briggs, Rolls-Royce Ltd., 14-15 Conduit Street. Dear Commander Briggs, I received yours of Nov. 26th.… | ||
| Scan225 | Continued letter from Henry M. Crane discussing engine damping devices and a reference to London fog. | ||
| View original record | contd :- -2- damping devices or attempt to get the same power by driving a smaller engine at a somewhat higher speed, requiring some sort of damping to make the operation satisfactory. I did not know… | ||
| Scan226 | Letter from General Motors regarding crankshaft harmonic balancers and torsional vibration. | ||
| View original record | C O P Y. OAKLAND MOTOR CAR DIVISION, General Motors Corporation, Pontiac, Michigan. Dec. 15th. 1926. Commander W. Briggs, Rolls-Royce Ltd., Conduit Street. Dear Sir, I have a letter from Mr. Crane… | ||
| Scan227 | Study on the operation and phase relations of a shaft and balancer system to control vibration. | ||
| View original record | contd :- -2- movement of the shaft. In practice this works out best when the rate of oscillation of the balancer alone is approximately two-thirds that of the shaft. These figures vary of course for… | ||
| Scan228 | Technical discussion on the effects of a balancer on shaft vibration and frequency. | ||
| View original record | contd :- -3- You asked whether the balancer might not split, the period forcing one disturbance higher and another lower than the normal period of the shaft. I observed this effect on some of the… | ||
| Scan229 | Correspondence with General Motors about a harmonic balancer. | ||
| View original record | To CWB. from Hs. 4634 Hsl/LG15.1.27 HARMONIC BALANCER. We should like you to write to the General Motors people and thank them for the information given in their letter in connection with the above.… | ||
| Scan230 | Communication with General Motors about a harmonic balancer. | ||
| View original record | To CWB. from Hs. X634 Hsl/LG15.1.27 HARMONIC BALANCER. We should like you to write to the General Motors people and thank them for the information given in their letter in connection with the above.… | ||
| Scan231 | Cover letter to the Royal Aeronautical Society submitting expanded remarks on the Carter paper for publication in their Journal. | ||
| View original record | X614 Expl: Dept: Hs/ACL1/LG. 28th. Jan. 1927. X8010 The Hon. Secretary, Royal Aeronautical Society, 7, Albermarle Street, London W.1. Dear Sir, I thank you for your letter of the 8th.inst. Enclosed… | ||
| Scan232 | Experiences and findings related to crankshaft vibrations in multi-crank engines. | ||
| View original record | CRANKSHAFT VIBRATIONS. My experience has been wholly confined to multi crank engines and have found that critical speeds could be estimated within about 7% on such engines from a knowledge of the… | ||
| Scan233 | Analysis of experiments on solid friction dampers and their effect on engine vibration. | ||
| View original record | contd :- -2- Some experiments were made with a solid friction damper consisting of a small flywheel at the front end of a six throw crankshaft and free to slip torsionally against the friction. A… | ||
| Scan234 | Letter from the Royal Aircraft Establishment concerning Torsional Vibration and the Oakland Balancer. | ||
| View original record | G. 16/859. When Telephoning with regard to this letter please ask for Extension Number......20....... TELEGRAMS: Ballooning, South Farnborough. TELEPHONE: 108 North Camp, 361 Aldershot, & 103… | ||
| Scan235 | Competitor's patent for a crankshaft damper similar to an existing internal design. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. BY. X634 Hs6/LG24.2.27. CRANKSHAFT DAMPERS. 4221 We notice in 'The Motor' 22.2.27 that Dr.F.W. Lanchester has obtained a patent for a scheme of combined damper… | ||
| Scan236 | Examination of the Lorraine Dietrich crankshaft and its synchronous speeds, including vibration and torsion stiffness tests. | ||
| View original record | X6324 To R. from Hs/ACH. c. to BJ. Wor. c. to RG. E. c. to DA. BY. Hs/ACL1/LG2.3.27. LORRAINE DIETRICH CRANKSHAFT AND SYNCHRONOUS SPEEDS. X3588 We have had the opportunity of examining the crankshaft… | ||
| Scan237 | Experiments related to crankshaft torsional vibrations, inertia, and synchronous speed on Goshawk and Lorraine engines. | ||
| View original record | contd :- -2- No form of damper or balancer is fitted to this shaft and the camshaft and accessory drive is taken from the flywheel end, probably for that reason, although apart from the extra… | ||
| Scan238 | Graph comparing the crankshaft stiffness and torsional deflection curves for a standard 20 HP and a Lorraine-Dietrich crankshaft. | ||
| View original record | CRANKSHAFT STIFFNESS COMPARISON. STANDARD R.R. 20 H.P. CRANKSHAFT. (SHOWN THUS: ______ ) LORRAINE - DIETRICH CRANKSHAFT. (SHOWN THUS: --- --- ). TORSIONAL DEFLECTION CURVES. MEASURED IN POSITION IN… | ||
| Scan239 | Fitting a slipper wheel to a Lorraine Dietrich car to damp torsional vibration and eliminate harmonics. | ||
| View original record | 4634 To Hs. from Hs/Rn. Hs/Rml/LGl1.3.27. LORRAINE DIETRICH CAR. X3588 We attach a note re. the above. While we have recently been going over the question of torsional vibration dampers, we have come… | ||
| Scan240 | Patentability concerns regarding a crankshaft damper in comparison to a Lanchester design. | ||
| View original record | X. 634 To BY. Hs. RG. From R and E. c. to BJ. Wor. Mr. Claremont. R1/M12.4.27. RE. CRANKSHAFT DAMPER. I am convinced that Lanchester expects, and believes, that his improved damper is in effect our… | ||
| Scan241 | Crankshaft damper and its relation to a Lanchester patent. | ||
| View original record | X. 634 To BY. Hs. Rg. from R. c. to BJ. Wor. E. Mr. Claremont. R1/M16.4.27. CRANKSHAFT DAMPER - LANCHESTER PATENT. I notice that in 1911 we were sending out chassis with spring drive damped, (at the… | ||
| Scan242 | Torsional vibrations and vibration dampers for the 20 HP engine. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to RG. E. c. to DA. BY. c. to OY. /634 Hs/ACL1/LG22.4.27. 20 HP. TORSIONAL VIBRATIONS AND VIBRATION DAMPERS. X3588 X5010 At various times we have conducted… | ||
| Scan243 | Comparison of the RR friction damper and the Summers Harmonic Balancer for reducing engine vibrations. | ||
| View original record | contd :- -2- (1) The friction damper as already employed on RR. engines - and - (2) The Summers Harmonic Balancer as employed on the Buick, Oakland and other products of The General Motors. (This… | ||
| Scan244 | Report discussing crankshaft vibration, harmonics, and the comparison of a standard 20 HP engine with a model 1-G-1 fitted with a damper. | ||
| View original record | contd :- -3- wheel of suitable proportions, is to split the 'master vibration' into two others, one at a higher and the other at a lower speed and therefore, if of such proportion to do this, would be… | ||
| Scan245 | Engine vibration, the master period, and the inertia of the crankshaft assembly. | ||
| View original record | contd :- -4- If the master period of the std. engine could be avoided until this speed we should have little fear of encountering it, and the higher engine speeds would be expected to be less rough… | ||
| Scan246 | Technical analysis comparing the inertia and stiffness of crankshaft components for the 20 HP and 1-G-1 models. | ||
| View original record | contd :- -5- strictly true - and replaced by a mass at the front end having one-third the inertia of these parts. A better approximation would be to treat each crank throw as an equivalent flywheel… | ||
| Scan247 | Technical document detailing calculations and principles of crankshaft stiffness and vibration. | ||
| View original record | contd :- -6- 1/3 [.00799 + .00583 + .016823] + .00582 = .01597 lbs.ft2 and the crankshaft itself contributes .0168/3 or 35% which indicates that the inertia of the crankshaft is to a certain extent… | ||
| Scan248 | Comparison of crankshaft assembly inertia and stiffness between a Lorraine Dietrich engine and a 20 HP engine. | ||
| View original record | contd :- -7- of benefit in raising the periodicity. As an example of this the stiffer shaft made for the std. 20 HP. which was 18% stiffer than std. raised the master period to 3500 r.p.m. We have not… | ||
| Scan249 | Comparison of crankshaft inertia and stiffness, particularly between four-bearing and seven-bearing types. | ||
| View original record | contd :- -8- .04322 16220 ------- X ------- = 1.47 23350 .016323 or 47% greater than the 20 HP. RR. This relatively large increase in inertia to stiffness must be partly due to the longer stroke as we… | ||
| Scan250 | Technical analysis of engine crankshaft vibration, comparing it to the Goshawk engine and discussing damping methods. | ||
| View original record | contd :- -9- Therefore the higher 'master period' on this engine is considered to be due to the following factors :- The crankshaft is considerably stiffer than that of the Goshawk and although this… | ||
| Scan251 | Technical discussion on high-speed engine design, focusing on crankshaft stiffness, inertia, and dampers. | ||
| View original record | contd :- -10- With the former we have had sufficient experience to shew that it is perfectly satisfactory below the master period but the latter type, although used on several American cars, would… | ||
| Scan252 | Analysis of engine vibration, dampers, and crankshaft stiffness for the 20 HP engine. | ||
| View original record | contd :- -11- the spring drive as pointed out by Mr. Royce in a memo. with regard to F.10. The 1-G-1 type of damper is a means of springing most of the forward mass and as this seems a promising… | ||
| Scan253 | Analysis of crankshaft harmonic vibrations and firing impulses in a six-cylinder engine. | ||
| View original record | contd :- -12- is considerably more severe than even the worst harmonic and gives us some idea of the difficulty we should have in providing an adequate damper to deal with it. We should not expect the… | ||
| Scan254 | Technical analysis of shaft and crankshaft harmonics and expected vibration speeds. | ||
| View original record | contd :- -13- The frequency of the shaft is 9900 oscillations/min. Therefore the frequency of the crankshaft will coincide with the frequency of the first harmonic of the gas pressure torque at 9900 /… | ||
| Scan255 | Calculations for the periodicity and frequency of a Lorraine Dietrich crankshaft. | ||
| View original record | PERIODICITY OF LORRAINE DIETRICH CRANKSHAFT. NODE L CRANKSHAFT FAN PULLEY I₁ l₁ I₃ l₂ I₂ FLYWHEEL THE POSITION OF THE NODE IS GIVEN BY l₂ = L[I₁ + ⅓I₃] / [I₂ + I₁ + ⅔I₃] WHERE :- I₁ = .3767 = FLYWHEEL… | ||
| Scan256 | Internal room stamp from Derby on an otherwise blank page. | ||
| View original record | ROLLS-ROYCE INT ROOM, 25 APR 1927 DERBY. | ||
| Scan257 | Diagram showing the amplitude of oscillation due to harmonics of gas pressure torque at full throttle for an engine without a damper. | ||
| View original record | TORSIONAL VIBRATIONS :- STD 20 R.R. WITHOUT DAMPER DIAGRAM SHEWING AMPLITUDE OF OSCILLATION DUE TO HARMONICS OF GAS PRESSURE TORQUE AT FULL THROTTLE. THE STD DAMPER DEALS EFFECTIVELY WITH THESE EXCEPT… | ||
| Scan258 | Page featuring a 'Print Room' date stamp. | ||
| View original record | ROLLS-ROYCE LIMITED PRINT ROOM 25 APR 1927 | ||
| Scan259 | Mr. Lanchester's patent for a crankshaft damper and potential prior art. | ||
| View original record | BYO from R. c. to BJ. Hs. c. to Mr. Claremont. X634 R3/M11.5.27. MR LANCHESTER'S CRANKSHAFT DAMPER. X.634 X.4221 Regarding Mr. Lanchester's patent of the combined halftime gear and damper flywheel, my… | ||
| Scan260 | Letter from F.H. Royce to A. W. Claremont discussing Mr. Lanchester's 1925 patented crankshaft damper. | ||
| View original record | COPY TO - BJ " HS. " RY "ELMSTEAD" WEST WITTERING. 13th. May 1927. A. W. Claremont Esq., My dear Mr. Claremont, re Mr. LANCHESTER'S CRANKSHAFT DAMPER - PATENTED 1925. From the specification you will… | ||
| Scan261 | Solution for crankshaft and friction dampers sticking in slipper drives. | ||
| View original record | To Hs. from E. c. to BJ. BY. X634 E2/M19.5.27. RE. SLIPPER DRIVES. X.634 X.8010 With reference to the trouble that occurs with crankshaft & friction dampers sticking during periods of rest, this might… | ||
| Scan262 | Outlining the required parts to complete tests on a crankshaft vibration damper. | ||
| View original record | To RHC. from Hs/Rn. X634 Hs/Rn1/LG28.6.27. X4221 Attached herewith are sketches of the parts required to complete our tests on the crankshaft vibration damper. These consist of a larger flywheel, more… | ||
| Scan263 | Steering column vibrations on the 10-EX model, suggesting a stiffer column as a solution. | ||
| View original record | To Hs. from DA. (X634) DA1/M2.7.27. STEERING COLUMN VIBRATIONS ON 10-EX. X.8430 X.8774 X.634 It appears to us that a further stiffening of the column itself would be the thing that would do most good… | ||
| Scan264 | Fitting a 1.G.1. type spring drive damper to a G.11 engine to ascertain its value and compare it to standard drives. | ||
| View original record | To R. from Hs/Tsn. c. to BJ. Wor. c. to RG. E. c. to DA. BY. X634 Hs/Tsn1/LG5. 7. 27. 1.G.1. TYPE SPRING DRIVE ON G.11. X4222 With a view to ascertaining the true value of 1.G.1. type damper we have… | ||
| Scan265 | Comparative analysis table and discussion on the inertia, torque, and stiffness for different drive systems. | ||
| View original record | contd :- -2- | | 1-G-1. | G.11 & G.111. | New Spring Drive. | |-----------------------------------------------|------------|--------------------------|-------------------| | Inertia of unsprung parts.… | ||
| Scan266 | Report page comparing a G.1. type damper with a standard slipper wheel regarding engine performance and crankshaft safety. | ||
| View original record | CONTD :- -3- if anything it produces a slightly smoother engine up to the main period than the standard slipper wheel. In addition it raises the critical speed at which the master period occurs by… | ||
| Scan267 | Requesting to test a second crankshaft damper with improved plates and a larger flywheel on a 20 HP test bed engine. | ||
| View original record | X634 To RHC. from Hs/Rn. Hs/Rm4/LG15.7.27. CRANKSHAFT DAMPER. X634 Y4221 We are anxious to try a second crankshaft damper with the improved plates and larger flywheel on the 20 HP. test bed engine as… | ||
| Scan268 | Design changes for the India 3 crankshaft damper and timing gear spring drive. | ||
| View original record | 4634 To BY. from E. c. to BJ. Hs. E1/M7.9.27. INDIA 3. CRANKSHAFT DAMPER X.5010 AND TIMING GEAR SPRING DRIVE. X.5020 X.634 We send you herewith drg. LeC. 2457 shewing the above. This is to be used for… | ||
| Scan269 | Design and balance of 'Straight Eight' and Hispano Six engines. | ||
| View original record | hs. from R. c. to BJ. Y634 R4/M7.9.27. X.4214 XX43X X.3531. X.634. "STRAIGHT EIGHT" ENGINES, AND HISPANO SIX. These should be watched by you and hs/Rn. with extreme keenness. They appear to be made in… | ||
| Scan270 | Proposed modifications to the Sports Phantom Engine crankchamber. | ||
| View original record | Hs. from R. c. to BJ. Wor. c. to BY. E. 4634 R1/M19.9.27. SPORTS PHANTOM ENGINE. X.8774 X.634 X.8010 Further to my memo. R4/M15.9.27., it is now possible to give more information concerning the… | ||
| Scan271 | Modifications to the damper and crankshaft for the Phantom Sports model to address roughness at very high revs. | ||
| View original record | Y634 Hs. from R. c. to BJ. BY. R3/M20.9.27. [strikethrough]XX8810[/strikethrough] X. 634 X. 8774 X. 3865 PHANTOM SPORTS. DAMPER ETC - ROUGHNESS AND VERY HIGH REVS. --- G.1. DAMPER. We are putting on… | ||
| Scan272 | Modifications to the Sports Phantom slipper flywheel, including reduced diameter and changes to the driving springs. | ||
| View original record | BY. from E. c. to BJ. Hs. X634 E1/M10.10.27. SPORTS PHANTOM - SLIPPER FLYWHEEL. X. 8300 X. 634 We send herewith drg. Lec.2472 shewing the modification to the above reducing its diameter. We have added… | ||
| Scan273 | Body mounting techniques using rubber seatings to reduce engine vibrations and road shocks. | ||
| View original record | Hs. from R. c. to BJ. BY. X634 R8/M20 10.27. BODY MOUNTING. X. 8830 X. 634 X. 8774 X. 8380 I think I can detect that the bodies we have mounted on an underframe, and supported on four points with… | ||
| Scan274 | Request to obtain two different types of springs with detailed specifications. | ||
| View original record | X634 To RHC. from Hs/Tsn. Hs/Tsnl/LG24.10.27. X5020 We should be glad if you will obtain for for us 8 off each of the following springs - not to be enamelled. (SPRING RATE = 30 lbs/in.) Wire… | ||
| Scan275 | Four-point rigid suspension system's effects on steering and engine vibration. | ||
| View original record | X654 ~~X235~~ X8410 Hs/Rm3/LG28.10.27. FOUR-POINT SUSPENSION -> RIGID AT THE FRONT AND REAR. STEERING. We noticed a slight improvement in steering joggles with this suspension when the hydraulics were… | ||
| Scan276 | Test results of a combined spring drive and crankshaft damper on a 20 HP engine, comparing vibration levels. | ||
| View original record | To R. from Hs/Tsn. c. to Wor. BJ. c. to RG. E. c. to DA. BY. c. to OY. X634 Hs/Tsnl/LG31.10.27. 20 HP. SPRING DRIVE AND CRANKSHAFT DAMPER. X5020 We have been doing some further tests on a combined… | ||
| Scan277 | Difficulties with keeping plates tight on splines and the effectiveness of a damper system. | ||
| View original record | contd :- We have not yet hit on the explanation of the periods being as they are and not in harmonical progression as with the standard drive. The most interesting difficulty we have so far… | ||
| Scan278 | Experiments with a spring drive to address issues with splines, resulting in an extended smooth running range. | ||
| View original record | contd :- -3- of splines which have given us trouble. We are proceeding with experiments with a car on the dynamometer. We consider that wehave extended the smooth running range on top gear by 4 1/2… | ||
| Scan279 | Test results and findings on the 20 HP, G.1. type spring drive and its effect on engine harmonics. | ||
| View original record | Hs/RmL/LGL.11.27. 20 HP. SPRING DRIVE. The main points which stand out from our tests on the G.1. type spring drive are :- (1) The G.1. type of spring drive arranged as indicated in the blue print… | ||
| Scan280 | Blueprint for an experimental spring-drive for the Goshawk-III engine. | ||
| View original record | EXPERIMENTAL SPRING-DRIVE, GOSHAWK-III, 1A, 1.C, 1.B, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21 | ||
| Scan281 | Blank cover or backing page with an archival stamp from the Print Room. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 31 OCT 1927 DERBY. | ||
| Scan282 | High-speed engine vibrations, specifically issues related to crankshaft critical speed and main bearing distortion. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. c. to OY. X634 Hs/Rm2/LG4.11.27. HIGH SPEED ENGINE VIBRATIONS. YS010 We have recently, both on the 40/50 HP. and 20 HP. been running the… | ||
| Scan283 | Racing engine crankcases and the performance of the 1-G-1 engine type. | ||
| View original record | contd :- -2- We have evidence that racing people do support this view. The latest 1500 c.c. racing engine designed by Thomas and at present being used by Purdy on the track, has a cast iron crankcase.… | ||
| Scan284 | Recommendation for a new engine suspension scheme to improve vehicle smoothness and reduce vibration. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to JY. Y634 Hs2/LGS.11.27. ENGINE SUSPENSION. Y8005 We recommend that a proper scheme is got out for supporting the engine in the manner suggested in the… | ||
| Scan285 | Tests on a new engine suspension system using Hardy couplings to reduce vibration. | ||
| View original record | To R. from Hs/Rn. c. to BJ. Wor. c. to E. DA. c. to EY. Hs/RmL/LGS.11.27. ENGINE SUSPENSION. In view of the fact that we understood you have been contemplating a four point engine suspension with a… | ||
| Scan286 | Blueprint showing the design for a rear engine mounting with a Hardy rubber-fabric coupling. | ||
| View original record | HARDY RUBBER-FABRIC COUPLING REAR ENGINE MOUNTING 10EX | ||
| Scan287 | Heavily faded document with a red stamp from the Print Room. | ||
| View original record | [Illegible text] Red stamp text: ROLLS-ROYCE LIMITED PRINT ROOM. 9 NOV 1927 DEPT. | ||
| Scan288 | Request to machine a second key-way on a test crankshaft due to high stress on the existing single key-way. | ||
| View original record | To RHC. from Hs/Rn. [Handwritten]: X639 Hs/Rn2/LG11.11.27. CRANKSHAFT TESTS. [Handwritten]: X634 [Strikethrough] [Handwritten]: X8010 Will you please machine a second key-way on the crankshaft which… | ||
| Scan289 | Request to borrow 20 HP crankshafts from the machining bay for a series of experimental tests. | ||
| View original record | Y634 To Sft. from Hs/Rn. Hs/Rn4/LG21.11.27. X5010 We wish to utilise 20 HP. crankshafts in various stages of machining for some experimental tests. The shafts will in no way be damaged. We shall only… | ||
| Scan290 | Instructing modifications to a 10-EX damper, specifying new spring loads and the effect of slack. | ||
| View original record | To RHC. from Hs/Rn. 1634 Hs/Rn7/LG29.11.27. 10-EX DAMPER. Will you please fit up 10-EX damper with the stronger driving springs (these should give 17-20 lbs. load at 17¾" radius when deflected to… | ||
| Scan291 | Test report on a 40/50 crankshaft damper detailing experiments with varied loads to determine optimal damping. | ||
| View original record | X634 HS/Rm/LGS.12.27. 40/50 CRANKSHAFT DAMPER. X634 X8010 Varied tests we have carried out with this damper on 10-EX. It was found that with the driving springs giving 8½ lbs. load when the damper… | ||
| Scan292 | Tests for a 20 HP crankshaft, detailing findings and proposed modifications to increase stiffness. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. X634 Hs/Rm/LG6.12.27. CRANKSHAFT TESTS. (underlined) X634 (written over crossed-out X5010) We have carried out tests on a 20 HP. crankshaft… | ||
| Scan293 | Engine performance, critical periods, and the strength of the 40/50 shaft. | ||
| View original record | contd :- -2- be increased as much as 100% without insuperable difficulties, which should enable us to put the critical period to above 4000 r.p.m. even with the increased big end weight. The 40/50… | ||
| Scan294 | The reduction in crankshaft torsional strength during machining operations. | ||
| View original record | Hs/Tsn/LGS.12.27. 20 HP. CRANKSHAFT TORSIONAL STRENGTH. The accompanying diagram shews the results of experiments to determine the reduction in strength that takes place in the principal machining… | ||
| Scan295 | Graph showing the results of a torsion test on a 20 HP crankshaft at various stages of machining, from forging to finished shaft. | ||
| View original record | FORGING DIMENSIONS: (AVERAGE) A. 2.375" JOURNAL E. 1.200" OUTSIDE FLASH B. 1.900" CRANKPIN F. 2.550 WEB WIDTH. C. 1.100" WEB (THICK) G. 4.625" CRANK D. 1.350" FLASH. CRANK RADIUS 2.250" 20 H.P.… | ||
| Scan296 | Reverse of a document showing a print room stamp and a handwritten annotation. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM. 6 DEC 1927 DERBY H20 hung on | ||
| Scan297 | Letter from the American branch to the UK branch regarding a new Chrysler Vibration Damper design. | ||
| View original record | X634 ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. RECEIVED STAMP: Hs DEC 29 1927 HY W OY9.R.12.15.27 December 15th, 1927. Mr. E. W. Hives, Rolls Royce Ltd., Derby, England. (Copy for attention Mr.… | ||
| Scan298 | Calculations regarding crankshaft stiffness, specifically the impact of increasing pin diameter and altering inertia. | ||
| View original record | CRANKSHAFT STIFFNESS - V634 - File X5010 With reference to R1/723/11/27 In an endeavour to obtain a value for increasing the dia. of the 20 H.P. pins on the shaft-period, we made the following… | ||
| Scan299 | Calculations and notes on crankshaft system inertia, stiffness, and shaft frequency. | ||
| View original record | This increases the total inertia of the crankshaft system by 70% of 25.2% or 17.5%. Old shaft-frequency = 1/2π √(29900/.02031) = 193 osc/sec New shaft-frequency = 1/2π √(41860/.0237) = 1/2π √1,770,000… | ||
| Scan300 | The design and material considerations for 40/50 & 20 HP crankshaft friction dampers. | ||
| View original record | HS. E. DA. from R. X634 R2/M1.1.28. c. to BJ. W.OW. BY. OY. X.7770 X.834 X.8010 X.5010 40/50 & 20 HP. CRANKSHAFT FRICTION DAMPERS. Originally these had a dry surface, and seemed to be the easiest… | ||
| Scan301 | Issues with crankshaft damper stiction, a 'galloping' knock, and potential solutions including different materials and designs. | ||
| View original record | R. from E. c. to Hs. X634 E1/M14.1.28. RE. CRANKSHAFT DAMPERS. X.8010 X.4012 X.634 X.8300 X.4117 I understand from Hs. that nothing gives as good results as woven cotton. This remains to be confirmed… | ||
| Scan302 | Engine mounting test for torque reaction, detailing severe vibration issues. | ||
| View original record | X634 Hs/Rml/LG24.1.28. TORQUE REACTION. XS005 X634 Front of the engine 2 point ridig. Rear of the engine mounted on the most flexible of the rubbers cut to length 1.100", the top rubbers having .100… | ||
| Scan303 | Graph showing the load vs deflection for torque reaction fixed mounting rubber blocks at the front. | ||
| View original record | TORQUE REACTION FIXED MOUNTING AT THE FRONT TOP RUBBER BLOCK SET UP TO .070 DEFLN APPROX WORKING RATING 1000 LBS/1" BOTTOM RUBBER BLOCK SET UP TO .170 DEFLN APPROX WORKING RATING 2500 LBS/1" RATING OF… | ||
| Scan304 | The back of a document with a purple 'Print Room' receiving stamp from Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 24 JAN 1928 DERBY. | ||
| Scan305 | Torque reaction problems on a sports car resulting from tests with different engine mountings and configurations. | ||
| View original record | V634 To DA. From Hs/Rm. Hs/RmL/LG24.1.28. TORQUE REACTION. +8005 We have been running the sports car with the rubber mounting at the rear and solid mounting in front. The result was not the same as… | ||
| Scan306 | Testing a rubber block fitted to the dashboard to address torque reaction and vibrations. | ||
| View original record | + G37 Hs/Rm/LG25.1.28. TORQUE REACTION. X8005 T8480 Condition of car as in Hs/Rml/LG24.1.28. Rubber block fitted to dash and torque taken through this, slight improvement noticeable but not very… | ||
| Scan307 | Materials for crankshaft damper friction surfaces and flywheel vibration. | ||
| View original record | E. Hs. BY. From R. V634 R2/M2.2.28. c. to BJ. Wor. CAR ENGINES - CRANKSHAFT DAMPERS. X.634 X.7010 X.8010 X.8300 I am expecting a report on the best material for the friction surface. Our old practice… | ||
| Scan308 | Experiments and proposals for engine mounting to manage torque and vibrations. | ||
| View original record | R. from E. c. to BJ. Hs. Rn. √634 E1/M4.2.28. EAC.10 ENGINE MOUNTING. X.7380 X.7005 X.634 X.7830 In discussing recent experiments on engine mount-ings during visits to Derby, we arrived at the… | ||
| Scan309 | Use of cork in crankshaft dampers, detailing issues with agglomerated cork and suggesting alternative solutions. | ||
| View original record | E. c. Hs. X634 BY4/G.9.2.28. CRANKSHAFT DAMPERS. --------------------- I notice in R2/M2.2.28. Mr. Royce is again reverting to the question of using cork. We have not found that agglomerated cork… | ||
| Scan310 | Notes on the calculation of crankshaft periods using Carter's Formula. | ||
| View original record | To RG. from Hs/Tsn. c. to E. BY. c. to R. Fl. X634 Hs/Tsnl/LG28. 2. 28. In accordance with your request we are sending you some notes on the calculation of crankshaft periods. Carter's Formula is… | ||
| Scan311 | The prediction of periods for crankshaft torsional vibrations. | ||
| View original record | CRANKSHAFT TORSIONAL VIBRATIONS. PREDICTION OF PERIODS. We give hereafter the principle results of recent work on crankshafts done in the Expl: Dept: It has nearly all been embodied in previous… | ||
| Scan312 | Worked example of a calculation for the torsional stiffness of one crank for the standard Phantom shaft using Carter's Formula. | ||
| View original record | contd :- -2- The following is a worked example of a calculation of the torsional stiffness of one crank for the standard Phantom shaft (E. 75216) using Carter's Formula) :- l = 2b + .8 h + 3/4 a (d₁⁴… | ||
| Scan313 | Calculation of crankshaft torsional stiffness and deflection for main bearings, comparing calculated figures with tested stiffness. | ||
| View original record | contd :- -3- ∴ θ = .1648 radians. Main bearings. Only a length 2 b is included in the formula for one crank, so that when added together there is found to be a length of 4.5" of main bearings not… | ||
| Scan314 | Crankshaft stiffness, discussing modifications to Carter's Formula and referencing test results. | ||
| View original record | contd :- -4- The stiffness used for predicting the torsional period is that of the total shaft in lbs.ft/radian. It will be seen that the two conditions corrections considered above account for over… | ||
| Scan315 | Page detailing the calculation and measurement of moments of inertia for crankshafts and the calculation of periodic speeds. | ||
| View original record | contd :- -5- getting rather closer agreement, between calculated and test figures, than Major Carter did on the same crankshafts. This is probably due to the method of correction outlined above. The… | ||
| Scan316 | Technical document detailing the calculation of crankshaft vibration frequency and critical speed. | ||
| View original record | contd :- -6- Ic consists of the sum of : (a) any inertia on the nose itself of the shaft. (b) One-third of all inertia distributed along the shaft. The distributed inertia is the sum of the following… | ||
| Scan317 | Calculation and discussion of engine critical speed based on component inertia and stiffness. | ||
| View original record | contd :- -7- The crankshaft stiffness Cs = 16,350 lbs.ft/radian. Crankshaft inertia (M k^2 / g) = .01682 slugs ft^2. Big ends (M x r^2 / g) = .00778 " " Pistons (M x r^2 / g) = .004710 " " Total… | ||
| Scan318 | Letter to Major B.C. Carter of the R.A.E. discussing results on crankshaft torsional vibrations. | ||
| View original record | X634 Hs/Tsn2/T. 29th February, 1928. X8010 X5010 Major B.C. Carter, R.A.E., Farnborough. Dear Sir, We attach the results of our work on Crankshaft Torsional Vibrations. As you will see, the basis all… | ||
| Scan319 | Results of recent work on crankshaft torsional vibrations and stiffness. | ||
| View original record | 2 Hs/Tsu/T29.4.28. CRANKSHAFT TORSIONAL VIBRATIONS. We give below the results of recent work on the above subject. Fig.1 shows the results of tests on the torsional stiffness of crankshafts. Figs. 2 &… | ||
| Scan320 | Crankshaft stiffness and torsion tests for Phantom and 20 HP models. | ||
| View original record | -2- Contd. The results of tests with various numbers of bearings are included in the above tables, but we give below the effect on three shafts of removing all but the two end and the centre bearings.… | ||
| Scan321 | Report page discussing crankshaft stiffness, inertia calculations, and test results for various engines. | ||
| View original record | -3- Contd. a main journal with the bearing omitted. Fig.6 shows the result of the test, on the centre journal of a 20 H.P. We also did a test to show the effect of bevelling the outer extremities of… | ||
| Scan322 | The final page of a letter awaiting test results and offering further clarification. | ||
| View original record | -4- Contd. have not yet got test results to send you. We hope the above information will be of use to you, and will gladly amplify any particular point if you should require it. HS/S.S. Tresilian. | ||
| Scan323 | Damping scheme for engine torque vibrations, which refers to an external sketch. | ||
| View original record | Hs. from DA/Hdy. X634 DA/Hdy1/M2.3.28. ENGINE TORQUE VIBRATIONS. X.8005 X.634 I give below a sketch of the damping scheme referred to in R3/M19.2.28., in order that you may know what is intended, and… | ||
| Scan324 | Crankshaft rigidity, with reference to the Stutz shaft and damping harmonics. | ||
| View original record | 4634 E. Hs. from R. c. to BJ. BY. RG. FL. R7/M5.3.28. X.8010 X.4336 X.634 CRANKSHAFT RIGIDITY - STUTZ AND OTHERS. Mr. Tresillians' work in watching this is excellent. The Stutz shaft is surprisingly… | ||
| Scan325 | Table of calculations for crankshaft stiffness based on a suggested empirical formula, compared with test results. | ||
| View original record | SUGGESTED EMPIRICAL FORMULA FOR CRANK SHAFT STIFFNESS IN BEARINGS. EQUIVALENT LENGTH FROM A TO B IN TERMS OF JOURNAL SHAFT ℓ = (2b + 0.8h) + 3/4 * (d₁⁴ - δ₁⁴)/(d₂⁴ - δ₂⁴) * a + 3/2 * r * (d₁⁴ -… | ||
| Scan326 | Query regarding the design of a car engine damper to have both dry friction and lubrication. | ||
| View original record | E. Hs. from R. c. to BJ. Wor. BY. X634 R5/M5.3.28. CAR ENGINES. X.8005 X.634 X.7005 Would it be possible to have the damper with dry friction, and yet well lubricated in its diametral fit - i.e. like… | ||
| Scan327 | Engine suspension flexibility using rubber and the proposed trial of torsional dampers. | ||
| View original record | E. Hs. from R. X634 R5/M9.3.28. c. to BJ. Wor. BY. EAC.10 ENGINE SUSPENSION. X.7005 E6/M7.3.28. X.634 We can get Derby to try any combination of flexibility of rubber, but I think it will have to be… | ||
| Scan328 | Design, materials, and patenting of a corrugated disc damper flywheel. | ||
| View original record | E. Hs. BY. from R. c.c. to EJ. Wor. Fl. 4634 R3/M9.3.28. DAMPER FLYWHEEL. Lec. 2520 XXXXX X. 634. X. 8300 This corrugated disc drive of the second friction plate should have an English patent (at… | ||
| Scan329 | Potential engine damage from 8-cylinder period harmonics and the capabilities of torsional crankshaft dampers. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. X634 10336 Hs/Rm3/LG19.3.28. With reference to R3/M9.3.28. We do not think that it would be possible to run on the 8-cyl. period for any… | ||
| Scan330 | Competitor improvements and proposing progressive development changes. | ||
| View original record | Hs. E. from R. DA. BY. c. to BJ. Wor. Y634 / R1/M27.3.28. 20 HP. X.5770 X.634 X.5080 X.5010 X.3531 Owing to the improvements (Hs/Rm's report) made by our competitors - amongst them Buick and Sunbeam -… | ||
| Scan331 | Letter arranging an unofficial visit to a research student to discuss crankshaft torsional vibrations. | ||
| View original record | 4634 Hs/Tsnl/LG. Expl: Dept: 17th. April 1928. - Constant Esq., Research Student, Cambridge University Engineering Laboratory, Cambridge. Dear Mr. Constant, The writer has been in touch with Major… | ||
| Scan332 | Letter detailing the methodology and results for crankshaft torsion tests. | ||
| View original record | Expl: Dept: X634 19th. April 1928. He/Tsnl/LG. Major E.C.Carter, Royal Aircraft Est., Farnborough. X2442 Dear Sir, CRANKSHAFT TORSION TESTS. In accordance with your telephone request, we are sending… | ||
| Scan333 | Letter discussing ongoing tests on crankshaft stiffness and torsional frequency, including related calculations. | ||
| View original record | contd :- -2- We are continuing with our tests on the effective stiffness of the crankshaft when twisted right through from the propeller hub to the tail of the crankshaft. In this case we correct our… | ||
| Scan334 | Blueprint detailing the method for measuring the twist in crankshafts. | ||
| View original record | R-R. METHOD OF TWISTING CRANKSHAFTS., PLAIN CRANKSHAFT:, CRANKSHAFT SUPPORTED IN CRANKCASE, REAR END FIXED, 30" RAD., TORQUE ON NOSE., DIAL INDICATORS, CRANKSHAFT AND RED. GEAR:, W, Th, Tc, T.S.… | ||
| Scan335 | Letter to Major Carter at the Royal Aircraft Establishment regarding crankshaft torsional vibrations and attached test information. | ||
| View original record | X634 Expl: Dept: Hs/Tsnl/LG. 23rd. April 1928. Major Carter, Royal Aircraft Est., St. Farnborough, Hants. X5010 Dear Sir, CRANKSHAFT TORSIONAL VIBRATIONS. We send herewith promised information on… | ||
| Scan336 | Crankshaft stiffness, calculations, and comparisons with other engine designs. | ||
| View original record | contd :- -2- The corrected stiffness of one crank is 2.11 X 10^6 lbs.ins/rad; your formula gives : 2.00 X 10^6 " " " , so that the ratio calculated/test stiffnesses = .950 or within 5% The large drop… | ||
| Scan337 | Letter discussing upcoming tests on experimental crankshafts and the F.X1 aero engine torsional period. | ||
| View original record | contd :- -3- We shall have several more experimental crankshafts to test shortly, and we are also working hard on the problem of our F.Xl aero engine torsional period. Our programme on Torsional… | ||
| Scan338 | Letter from H. Constant at the Engineering Laboratory, Cambridge, to Mr. Tresilian arranging a meeting. | ||
| View original record | TELEPHONE Nº 1195 (2 LINES) 4634 Engineering Laboratory, Cambridge. In Reply to Hs/Tsne/LG 25th April 1928 Dear Mr Tresilian, I must apologize for the delay in answering your enquiry, but your letter… | ||
| Scan339 | Letter from the Royal Aircraft Establishment concerning Crankshaft Torsion Tests. | ||
| View original record | G. 16/859. X634 When Telephoning with regard to this letter please ask for Extension Number 20 TELEGRAMS: Ballooning, South Farnborough. TELEPHONE: 108 North Camp, 361 Aldershot, & 103 Farnborough.… | ||
| Scan340 | Letter to H. Constant at the Engineering Laboratory, Cambridge, to arrange a visit for the following week. | ||
| View original record | X634 HS/Tsni/LG. Exptl: Dept: 26th. April 1928. H. Constant Esq., Engineering Laboratory, Cambridge. Dear Mr. Constant, It would be very suitable for me to visit Cambridge on Monday of next week, and… | ||
| Scan341 | Letter from the Royal Aircraft Establishment regarding crankshaft torsional vibrations and the stiffness of a new 20 HP shaft. | ||
| View original record | G. 16/859. X634 When Telephoning with regard to this letter please ask for Extension Number...........20... TELEGRAMS: Ballooning, South Farnborough. TELEPHONE: 108 North Camp, 361 Aldershot, & 103… | ||
| Scan342 | Letter to Major B.C. Carter of the Royal Aircraft Establishment regarding crankshaft torsional vibrations and bearing stiffness formulas. | ||
| View original record | X634 Expl: Dept: HS/TML/LG. 1st. May 1928. Major B.C. Carter, Royal Aircraft Est., St. Farnborough, Hants. X 6010 Dear Sir, CRANKSHAFT TORSIONAL VIBRATIONS. We have received your letter dated 30.4.28.… | ||
| Scan343 | Bearing stiffness measurements for different engine models and outlining a proposal for future experiments. | ||
| View original record | contd :- -2- Engine. Piece No. Stiffness in Lbs.ins/rad. In-bearings. out-of-bearings. India lll. E.54640 2.11 X 10^6 1.675 X 10^6 Sports Phantom. E.76546 3.485 " 2.610 " Std. Phantom. E.75216 4.12 "… | ||
| Scan344 | Letter to the Engineering Laboratory in Cambridge regarding crankshaft dimensions, test results, and a formula for estimating torsional periods. | ||
| View original record | X634 Expt: Dept: Hs/Ten2/LG. 3rd. May 1928. H. Constant Esq., Engineering Laboratory, Cambridge. X8010 X5010 -> for prints Dear Constant, CRANKSHAFTS. I attach a table which gives the dimensions and… | ||
| Scan345 | Letter discussing modifications to Carter's formula for a 6-cylinder engine and related experiments. | ||
| View original record | contd :- -2- The third diagram attached shews the extra terms that we have added to Carter's formula to make it cover a 4-bearing 6-cyl. engine. I should be interested if you could try it sometimes on… | ||
| Scan346 | Visit to Cambridge Engineering Laboratory regarding crankshaft research and torsional vibration testing. | ||
| View original record | To R. from hs/Tsn. c. to BJ. Wor. c. to RG. E. c. to DA. BY. X634 Hs/Tsnl/LGS.5.28. X.634 X.5010 X.2442 X.1282 X.8010 VISIT TO CAMBRIDGE RE. CRANKSHAFTS. Considerable research work on the above… | ||
| Scan347 | Engine experiments with gas from oil and preparations for airship work. | ||
| View original record | contd :- -2- frequency of 4000 vibrations per min. in a shaft with a calculated frequency of 5000 per min. They have also got an Eagle Vlll. engine at Cambridge which they are running on gas. The… | ||
| Scan348 | Letter discussing torsion test results on a wide-web Phantom crankshaft and requesting data for a Curtiss D-12 crankshaft. | ||
| View original record | X634 16th. May 1928. Ha/Tsnl/LC. H. Constant Esq., The Engineering Laboratory, Cambridge. Dear Constant, I must apologise for not replying XXXXXXXX before, but I delayed my letter until I could… | ||
| Scan349 | Alterations made to car 14-EX, including fitting a hypoid rear axle, and arranging its transport for testing. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to C. Bg. 4634 Hs4/LG28.6.28. 14-EX. X.7770 X.7830 X.2066 X.5770 X.634 The rear seats of this car have been altered to Sales Instructions. We propose sending the car… | ||
| Scan350 | Difficulties experienced with new crankshaft dampers on 20 HP and 40/50 HP cars. | ||
| View original record | To R. from Hs/Rn. c. to BJ. Wor. c. to E. DA. c. to BY. X634 Hs/Rn4/LG19.7.28. NEW TYPE CRANKSHAFT DAMPERS. X.7010 X.5010 X.634 20 HP. LeC.2457 40/50 HP. LeC.2462/2472. We have now had a considerable… | ||
| Scan351 | The design and issues of damping springs, stops, and friction discs for a drive mechanism. | ||
| View original record | contd :- -2- If we could get away from metal stops, the trouble could not exist, perhaps we should be better off it we made the spring come choc-a-bloc as a stop. We feel that rubber with its variable… | ||
| Scan352 | The slipper wheel and drive versus the 1-G-1 type, and the future requirement for a reduced inertia damper. | ||
| View original record | contd :- -3- speeds of our present power units, for the time being at any rate, there does not seem to be any reason for departing from the present slipper wheel and drive which is simpler than the… | ||
| Scan353 | Road test report on a new type of spring drive fitted to a 12-EX, detailing weight reductions and performance improvements. | ||
| View original record | X634 To Hs/Rm. from Hs/GWH. Hs/GWH1/LG25.7.28. NEW TYPE SPRING DRIVE X7020 FITTED TO 12-EX. Weight of damping wheels before being reduced :- Front - unit E.77389 11 lbs. 10 ozs. Rear - unit E.77390 19… | ||
| Scan354 | Request to fit up the 12-G-4 crankshaft damper with stronger driving springs and reduced damping friction. | ||
| View original record | To RHC. from Hs/Rm. X634 Hs/Rm10/LG20.8.28. 12-G-4 CRANKSHAFT DAMPER. X5010 Flywheel damper. Will you please fit up the damper on 12-G-4 with the stronger driving springs specified in… | ||
| Scan355 | Engine roughness at high speeds in 20 HP and 40/50 HP models, recommending a trial of the balanced crankshaft. | ||
| View original record | To R: from Hs: c. to B.J. Nor. c. to E. DA. c. to BY. X634 Hs5/LG13.11.28. ENGINE ROUGHNESS AT HIGH SPEEDS. We are not satisfied with the engine smoothness at high speed either on the 20 HP. or the… | ||
| Scan356 | Report suggesting the re-introduction of counterweights on crankshafts to reduce high-speed roughness and vibrations. | ||
| View original record | To R. from Hs/Tsn. c. to BJ. Wor. c. to HG. E. c. to BY. Hs/Tsn1/LG13.11.28. HIGH SPEED ROUGHNESS AND OVERRUN VIBRATIONS. V634 I n the following report we give our reasons for suggesting that we… | ||
| Scan357 | Investigating the possible causes of high-speed engine roughness and vibration. | ||
| View original record | -1- POSSIBLE CAUSES. The following three are the only possible causes that we know of high speed roughness and vibration in our [redacted] : (1) Out of balance, either 'linear' or 'torsional'. (2)… | ||
| Scan358 | Analysis of engine vibration, resonance, and roughness at high speeds, mentioning the Eagle XVI and 20 HP models. | ||
| View original record | contd :- -2- depend only on the magnitude of the unbalanced force and the weight or inertia of the engine unit. The effect of mounting the engine in some more or less elastic way will be to introduce… | ||
| Scan359 | Analysis of crankshaft torsional periods and distortion of moving parts as causes of high-speed engine vibration. | ||
| View original record | contd :- -3- However on other cars we find that the main torsional period when reached is very much more sudden and sharply defined. We have noticed recently on two cars with smooth engines that we… | ||
| Scan360 | Engine vibrations, crankshaft distortion, and possible cures such as counter-weights and stiffening the crankcase. | ||
| View original record | contd :- -4- It is possible for this force, acting on the engine parts, to alternate between plus and minus nearly 2 tons. None of our materials of construction, being elastic, are capable of… | ||
| Scan361 | Technical discussion on crankshafts, counterweights, and the properties of materials like cast iron and steel for crankcases. | ||
| View original record | contd :- -5- make a single crank in two short bearings turn safely up to 7000 r.p.m. On some cars only a few counter weights are used, on those journals where the loads are likely to be high due to… | ||
| Scan362 | Reducing high-speed engine roughness, comparing the effects of adding counterweights versus using a stiffer crankcase. | ||
| View original record | contd :- -6- upper one cannot be fixed with definite certainty on a test bed. We are led to conclude that the improved smoothness lies in the stiffer support to the bearings on 1-G-1 engine, in which… | ||
| Scan363 | Crankshaft design, counterweights, and a comparison of engine smoothness in various cars. | ||
| View original record | contd :- -7- counter weights as to be independent of bearing support for its truth of running at high speeds. We prefer this to the American scheme of putting the weight into a cast iron crankcase. We… | ||
| Scan364 | Engine vibrations and periods, referencing opinions on crankshaft counterweights and balance. | ||
| View original record | contd :- -8- We ran through the main period once, when the engine was again smooth. This top period was not serious, and we believe could have been damped out. With a S/C. and increased engine torque… | ||
| Scan365 | Crankshaft balancing methods and vibration experiments on a 20 HP engine. | ||
| View original record | contd :- -9- The Packard, in which the crankshaft appears to be not a forging, but machined all over, is indication of the lengths to which they are prepared to go. The Packard and the Chrysler use… | ||
| Scan366 | Investigation and analysis of engine vibration at various speeds. | ||
| View original record | contd :- -10- wheel case gears were left untouched. We noticed that the engine vibration from 30/40 m.p.h. in 3rd. gear was about 80% less than when pistons and rods were fitted. At 41 m.p.h. (2960… | ||
| Scan367 | Analysis of crankshaft vibration issues, such as 'hogging' and 'sagging', leading to a suggested new crankshaft design for the 20 HP engine. | ||
| View original record | contd :- -11- the shaft, and thus affected by the presence or absence of the blocks. Owing to the nature of the vibration as observed we are inclined to put it down to distortion, as the sole… | ||
| Scan368 | Crankshaft design improvements, including pin length, disc-web shafts, and testing procedures. | ||
| View original record | contd :- -12- We think we can increase the lengths of the pins very considerably at the expense of the webs, as shewn, provided the latter are made really wide. Disc-web shafts sometimes have very… | ||
| Scan369 | Longitudinal section diagram of a Packard Standard Eight engine. | ||
| View original record | outer casing has a drilled and ground hole in which a metering jet is inserted, this metering jet having some amount of clearance be- of the rotating vane by small drilled holes equipped with ball… | ||
| Scan370 | The reverse side of a document showing a Print Room stamp from Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 16 NOV 1928 DERBY. | ||
| Scan371 | Diagram showing the inertia loads acting on the crankshaft for a 20 HP engine at 3500 RPM. | ||
| View original record | 20 HP - INERTIA LOADS ON CRANKSHAFT, SCALE - 1" = 1000 LBS, 3500 RPM, FIG. 1, CRANK ANGLE, 0, 20°, 40°, 60°, 80°, 100°, 120°, 140°, 160°, 180°, 200°, 220°, 240° 260°, 280°, 300°, 320°, 340°, 4357 LBS,… | ||
| Scan372 | Blank document page with a 'Print Room, Derby' date stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 13 NOV. 1928 DERBY. | ||
| Scan373 | Blueprint showing types of counterweights employed in some cars. | ||
| View original record | FIG. 3, TYPES OF COUNTERWEIGHTS EMPLOYED IN SOME CARS., STR. 8 ISOTTA., STR. 8. PACKARD., 18 H.P. 6 CYL. DELAGE, 40-50 H.P. 6 CYL. DELAGE, 6 CYL. DE SOTO., RECEIVED, 13 NOV 1928, DERBY, Tsm. 6/11/28. | ||
| Scan374 | Diagram showing the arrangement of counterweights on crankshafts for various competitor engines. | ||
| View original record | FIG. 2. ARRANGEMENTS OF COUNTERWEIGHTS IN SOME ENGINES STR. 8. PACKARD 4 BEARINGS 6 CYL CHRYSLER 7 BEARINGS 6 CYL DE SOTO 4 BEARINGS 30° 6 CYL. A.C. 4 BEARINGS. 6 CYL FRANKLIN 7 BEARINGS 6 CYL 20HP… | ||
| Scan375 | Blueprint for a counterweighted crankshaft for a 20 HP engine, detailing its expected benefits. | ||
| View original record | COUNTERWEIGHTED CRANKSHAFT - FOR 20 HP ENGINE. Fig 4 WHICH SHOULD GIVE: 1) GREATER SMOOTHNESS AT HIGH RPM. DUE TO TOTAL BALANCE OF ALL ROTATING WT. I.E. BIG-END, PIN, & WEBS, & THUS NEGLIGIBLE… | ||
| Scan376 | Engine dampers, engine mounting, crankshaft balance, and the use of balance weights on the 20 HP model. | ||
| View original record | Hs. from R. X634 c. to BJ. Wor. BY. R1/M17.11.28. RE. ENGINE DAMPERS. X.5005 X634 X.5010 *.1482 I believe that these should be much tighter than we are generally sending them out. We have tightened… | ||
| Scan377 | Views on crankshaft design, engine vibrations, and the use of balance weights for 6-cylinder engines. | ||
| View original record | To E. from Hs/Tsn. X634 Hs/Tsnl/LG2 9.1.29. CRANKSHAFTS. In accordance with our brief conversation when you were up recently, I am sending you my latest views on the above subject. You may remember… | ||
| Scan378 | Shaft distortions, vibrations, and how engine components resist dynamic forces. | ||
| View original record | contd :- -2- distortions. It should be realised that just to provide bearings to any shaft rotating under load is no guarantee of smooth vibrationless running. In order to carry any load the bearings… | ||
| Scan379 | Methods to reduce engine vibration by using heavy crankshafts, balance-weights, and providing more support to main bearings. | ||
| View original record | contd :- -3- torque variations of the engine, resisted on the spot by the flywheel, do not reach the back wheels. It is on the above reasoning that I advocate heavy crankshafts, since it helps both… | ||
| Scan380 | Technical discussion on engine smoothness and vibration, comparing the 20 HP engine with competitor models and considering improvements like counter-weights. | ||
| View original record | contd :- -4- I think this is an uneconomic application of weight, which would be of more advantage in the crankshaft. Also I think [s]moreover[/s] that too much steadying of the crankshaft by means of… | ||
| Scan381 | Report page detailing crankshaft design modifications and performance considerations for a 20 HP engine. | ||
| View original record | contd :- -5- Alfa, which is still smooth at 6000 r.p.m. I myself am convinced that 90% of the difference will be found inside the crankcase. On the attached prints I shew an attempt I made to see what… | ||
| Scan382 | Drawing of a counterweighted crankshaft for a 20 HP engine. | ||
| View original record | COUNTER WEIGHTED CRANK SHAFT - 20 H.P. METHOD OF ATTACHING CENTRE PAIR OF COUNTERWEIGHTS. PEENED OVER SECTION A.A. LOOKING -> SECTION B.B. LOOKING -> SECTION C.C. STAMP: ROLLS-ROYCE, LIMITED PRINT… | ||
| Scan383 | Blueprint showing three views of a connecting rod assembly. | ||
| View original record | 29/11/28., 10370 | ||