Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Technical specifications for an auto switch. | ||
| View original record | To R. from EFC. c. BJ. E. ORIGINAL EFC4/T1.12.27. RE AUTO SWITCH. X4008 In the above connection the following information may be useful :- Maximum gap of contact points (measured normally to surfaces)… | ||
| Scan002 | On Standard Phantom springing, detailing issues with adopting negative camber front springs and proposing rear suspension modifications. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. DA. c. to BY. OY. ORIGINAL Hs/Rm4/LGI.12.27. STANDARD PHANTOM SPRINGING. X8440 (crossed out) X8420 (crossed out) X8425 We cannot adopt the front springs with… | ||
| Scan003 | Suspension characteristics and the avoidance of pitching by optimizing the K²/AB ratio and component weight distribution. | ||
| View original record | To R. from Hs/Rm. c.c. to BJ. Wox. c.c. to RG. E. c.c. to DA. BY. c. to OY. ORIGINAL Hs/Rm3/LG2.12.27. SUSPENSION. X3900 (crossed out) X5410 X5410 In OY13/E111026, a figure was given for the ratio… | ||
| Scan004 | Technical memo discussing independent rear suspension and reducing the wheelbase of the Phantom. | ||
| View original record | contd :- -2- transferred to the sprung weight in the optimum position for increasing K2. Independent rear wheel suspension has the same advantages. Reducing the wheelbase of the Phantom by off-… | ||
| Scan005 | Operation of the auto switch and its effect on the dynamo and cutout system at high speeds. | ||
| View original record | To R. from EFC. c. BJ. E. c. Da. PN. c. CWB. BY. c. Wor. ORIGINAL AUTO SWITCH. When the auto switch resistance is, by operation of that switch, included in the field circuit, the E.M.F. of the dynamo… | ||
| Scan006 | Auto switch and dynamo characteristics, proposing an investigation into achieving a flatter generator output curve at high speeds. | ||
| View original record | -2- Contd. the auto switch is very much less likely to operate at high speeds than at moderate speeds, and when it operates at such a speed that the dynamo output is a maximum, in that case the cutout… | ||
| Scan007 | Experimental testing of an auto charge control switch before wider implementation. | ||
| View original record | To R. from EFC. c. BJ. Wor. EFC5/T5.12.27. Y8673 X 2008 AUTO CHARGE CONTROL SWITCH. Reference your R3/M2.12.27; we would prefer to look upon the above unit as being too experimental at the moment to… | ||
| Scan008 | Comparison and further testing of a Midgley unit against an in-house system. | ||
| View original record | -2- Contd. something that is different. On going into the matter thus deeply we find that although we have had a combined Midgley unit (we have never had a Midgley dynamo) and we have previously made… | ||
| Scan009 | Power loss tests conducted on the Phantom single downpipe exhaust system. | ||
| View original record | To R. from Hs/ACL1 c. to BJ. Wor. c. to E. BY. c. to DA. OY. ORIGINAL Hs/ACL1/LG6.12.27. PHANTOM SINGLE DOWNPIPE EXHAUST SYSTEM. X8230 Further tests have been carried out with the single downpipe… | ||
| Scan010 | Power loss tests comparing single and standard manifold exhaust systems. | ||
| View original record | contd :- -2- compared with 13 HP. experienced with the single manifold system. With the single manifold system the added restrict- ion of cutout closed results in a loss relative to open exhausts of… | ||
| Scan011 | Summary of findings on a single manifold exhaust system, detailing power loss, heat, noise, and potential modifications. | ||
| View original record | contd :- -3- was necessary in order to avoid interference from cyls. where the exhaust periods overlapped. It will be remembered a number of indicator diagrams were taken shewing the effect of… | ||
| Scan012 | Graph showing power loss to a single outlet exhaust manifold for a Phantom engine, plotting Brake Horsepower against RPM. | ||
| View original record | POWER LOSS TO SINGLE OUTLET EXHAUST MANIFOLD (PHANTOM). V176. ENGINE RE.25. COMPRESSION RATIO = 4.12. LONG DURATION INLET CAM. STANDARD INDUCTION SYSTEM EXHAUST SYSTEM TO L.C.2432/6/7. BRAKE HORSE Po… | ||
| Scan013 | Blank document page with a purple stamp. | ||
| View original record | ROLLS-ROYCE, LTD PRINT RC 6 DEC 1927 | ||
| Scan014 | Graph showing power loss to standard exhaust manifolds for the Phantom engine. | ||
| View original record | POWER LOSS TO STANDARD EXHAUST MANIFOLDS (PHANTOM). ENGINE R.E. 25 COMPRESSION RATIO 4.12 LONG DURATION INLET CAM STANDARD INDUCTION SYSTEM STANDARD TWO BRANCH EXHAUST SYSTEM. BRAKE HORSE POWER RPM OF… | ||
| Scan015 | Graph comparing the power loss of different exhaust systems on a Phantom engine. | ||
| View original record | V 178. POWER LOSS COMPARISON OF EXHAUST SYSTEMS ON PHANTOM ENGINE. 28-11-27 ENGINE RE 25. COMPRESSION RATIO = 4.12 LONG DURATION INLET CAM. STANDARD INDUCTION SYSTEM. CURVES. ① MANIFOLD TO Le C… | ||
| Scan016 | Graph plotting Brake Horse Power against engine RPM for a Phantom engine to show the power loss with different exhaust manifold setups. | ||
| View original record | POWER LOSS TO MODIFIED SINGLE EXHT MANIFOLD (PHANTOM) ENGINE RE 25 COMPRESSION RATIO = 4.12 LONG DURATION INLET CAM STANDARD INDUCTION SYSTEM EXHAUST MANIFOLD TO L.C. 2432/6/7 BUT MODIFIED TO V182.… | ||
| Scan017 | Sketch showing an alteration to a Phantom single outlet exhaust manifold. | ||
| View original record | V182. SKETCH SHEWING ALTERATION TO PHANTOM SINGLE OUTLET EXHAUST MANIFOLD (LE.C. 2432/6/7). 26.11.27 | ||
| Scan018 | Blank document page with a purple archive stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM 6 DEC 1927 DERBY | ||
| Scan019 | 10,000-mile test on a mushroom type H.T. rotor, proposing a redesign with vanes to prevent corrosion. | ||
| View original record | To R. from EFC. c. E. BJ. c. HY. Wor. EFC3/T6.12.27. MUSHROOM TYPE H.T. ROTOR. X8690 We are putting this type of rotor on the two cars for 10,000 mile test to work in conjunction with the scrubbing… | ||
| Scan020 | Stiffness tests for a 20 HP crankshaft, detailing results and potential design modifications. | ||
| View original record | To R. from Hs/RG. c.c. to BJ. Wor. c.c. to E. DA. Hs/Rm/LG6.12.27. [STAMPED IN GREEN: ORIGINAL] CRANKSHAFT TESTS. [Handwritten: X.5010 / X.634] We have carried out tests on a 20 HP. crankshaft in… | ||
| Scan021 | Critical speed, big end weight, and the weakness of the 40/50 shaft pins. | ||
| View original record | contd :- -2- should enable us to put the critical speed to above 4000 r.p.m. even with the increased big end weight. The 40/50 shaft to LeC.2488 seems only relatively weak on the pins. Hs/Rm. | ||
| Scan022 | Experiments determining the reduction in torsional strength of a 20 HP crankshaft during machining operations. | ||
| View original record | Hs/Tsn/LG5.12.27. 20 HP. CRANKSHAFT TORSIONAL STRENGTH. -------------------------- The accompanying diagram shews the results of experiments to determine the reduction in strength that takes place in… | ||
| Scan023 | Graph showing the results of a torsion test on a 20 HP crankshaft from forging to finished shaft. | ||
| View original record | FORGING DIMENSIONS: (AVERAGE) 20 HP CRANKSHAFT - TORSION TEST. FORGING TO FINISHED SHAFT. TABLE OF DIMENSIONS: A. 2.375" JOURNALS B. 1.900" CRANKPINS C. 1.100" WEB (THICK) D. 1.350" TO INSIDE FLASH.… | ||
| Scan024 | The reverse of a document page, with a 'Print Room' stamp from Derby. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 6 DEC 1927 DERBY. | ||
| Scan025 | Preliminary trial of a 2A sequence starter motor fitted to an EAC.7 engine. | ||
| View original record | To R. from EFC. c. BJ. E. c. BY. Wor. SEQUENCE STARTER. Further to our EFC4/T26.11.27 we have now got the 2A motor back on the EAC.7 engine fitted with parallel teeth with rounded corners for… | ||
| Scan026 | Issues with disengagement and whirring of helical teeth. | ||
| View original record | -2- Contd. on disengagement is not as bad as it would otherwise be. I am informed by Mr. Lidsey that there was also some whirr on disengagement with the 50 helical teeth but this was comparatively… | ||
| Scan027 | Trade-offs of flexible front springs and suspension testing on Phantom and Silver Ghost models. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. BY. c. to DA. OY. ORIGINAL Hs/Rml/LG9.12.27. SUSPENSION. Originally one advantage of the introduction of the front axle control was considered to be that it… | ||
| Scan028 | Summary of tests on different rear spring setups and their effects on vehicle handling and ride comfort. | ||
| View original record | contd :- -2- Sir John Latta, Capt. Kruse and Mr. G. Summers being three. The fundamental attribute of these springs is that they permit of a lower riding position for a given immunity from buffer… | ||
| Scan029 | The results of crankshaft torsion tests on a 20 HP shaft at various machining stages. | ||
| View original record | To R. from Hs/Tsn. c. to BJ. Wor. c. to RG. E. c. to BY. ORIGINAL Hs/Tsn1/LG9.12.27. CRANKSHAFT TORSION TESTS. X5010 X1418 Further to Hs/Rm/LG6.12.27. and Hs/Tsn/LG5.12.27 we are now giving fully the… | ||
| Scan030 | Analysis of crankshaft stiffness, comparing test and calculated values and discussing the reinforcing effect of bearings. | ||
| View original record | contd : -2- This explains to some extent the apparent large over-estimation of the stiffness (15%) when approaching the finished condition. The large discrepancies in the opposite direction between… | ||
| Scan031 | Crankshaft testing, including deflection, 'bell-mouthing', and analysis of various engine models. | ||
| View original record | contd :- -3- Std. Phantom 6.5% Sports Phantom 21.0% Std. 20 HP. 6.0% ------------ It appears that a shaft with thin crankpins as its weakest part is more prone to 'unwind' its throws, thus relying… | ||
| Scan032 | Graph showing the results of a torsion test on a 20 HP crankshaft from its initial forging to the finished shaft. | ||
| View original record | FORGING DIMENSIONS. (AVERAGE) A. 2.375" JOURNALS. B. 1.900" CRANKPINS C. 1.100" WEB (THICK) D. 1.350" TO INSIDE FLASH. E. 1.200" OUTSIDE FLASH. F. 2.550" WEB WIDTH. G. 4.625" CRANK. 2.250" CRANK… | ||
| Scan033 | Heavily faded and illegible document, with only a date stamp remaining visible. | ||
| View original record | The main body of the text is illegible due to severe fading. A purple ink stamp in the bottom right corner reads: ROLL... ...ED, PRI..., 10 DEC 1927, DERB[Y]. | ||
| Scan034 | Graph showing the deflection of a 20 HP central journal when twisting a crankshaft. | ||
| View original record | 20 H.P. DEFLECTION OF CENTRAL JOURNAL, WHEN TWISTING CRANKSHAFT. JOURNAL MOVEMENT - THOUSANDTHS OF AN INCH. UPWARDS DOWNWARDS DEGREES TWIST 2 1 0 1 2 1.000 .500 .500 1.000 1.500 2.0 9.12.27. | ||
| Scan035 | Graph and table detailing crankshaft torsion tests for Phantom and 20 HP models. | ||
| View original record | GRAPH 2. CRANKSHAFT TORSION TESTS. PHANTOM & 20 H.P. TABLE DATA: CURVE | CRANKSHAFT & CONDITIONS | STIFFNESS LBS.FT./RAD 2 | STD. PHANTOM. SEVEN BEARINGS. | 45,000 3 | STD. PHANTOM. BEARINGS. 1-4-7. |… | ||
| Scan036 | Torsion test results for a 20 HP crankshaft, from the forging stage to the finished shaft. | ||
| View original record | 20 H.P. CRANKSHAFT - TORSION TESTS FORGING TO FINISHED SHAFT COLUMN HEADERS: OPERATION, 15, 19, 21, 22, 31, 33A, 39A, FINISHED SHAFT MAIN BEARINGS No. 1, DIA.: 2.200, =, =, =, =, =, =, 2.000 No. 1,… | ||
| Scan037 | Blank page with a print room stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM 10 DEC 1927 DERBY. | ||
| Scan038 | The advantages and testing of an auto charge control switch, intended for an experimental car and then Mr. Royce's car. | ||
| View original record | To R. From EFC. c. E. FN. c. CWB. BT. c. HY. Ds. ORIGINAL A/T10.12.27. AUTO CHARGE CONTROL SWITCH. X4008 Herewith please find some notes we have got together on the advantages of the R.R. electrical… | ||
| Scan039 | Notes on the advantages of the R.R. electrical system incorporating the auto charge control switch. | ||
| View original record | 9th December, 1927. ------------ NOTES ON THE ADVANTAGES OF THE R.R. ELECTRICAL SYSTEM INCORPORATING THE R.R. TYPE OF AUTO CHARGE CONTROL SWITCH. The advantages of the R.R. type of auto charge control… | ||
| Scan040 | The function and arrangement of auto switches for battery charging and ignition control. | ||
| View original record | -2- Contd. (2) Whether an auto switch unit of any kind is or is not incorporated in the system, and when the dynamo is not running, it reduces the possibility of the battery discharging through the… | ||
| Scan041 | Continued page discussing battery ignition testing and running the vehicle without charge. | ||
| View original record | -3- Contd. It will be an advantage when testing the battery ignition to have the lower battery voltage resulting from the battery not being on charge. Further, it will be an advantage to have a… | ||
| Scan042 | Comparison of the auto exit charge control switch against the Midgley auto switch, listing its advantages. | ||
| View original record | -4- Contd. The use of the R.R. type of auto exit charge control switch is an advantage over the type represented by the Midgley auto switch because:- (11) It dispenses with the series coil. (12) It… | ||
| Scan043 | List of advantages for dispensing with a series coil and using rigid contacts in an electrical system. | ||
| View original record | -5- It is an advantage to dispense with the series coil because :- (111) Of simpler design. (112) The elimination of the series coil carrying negative ampere turns due to a portion of the consuming… | ||
| Scan044 | Dynamo and battery charging characteristics, including brush wear and vibration. | ||
| View original record | Contd. -6- (132) If, as is practically the case, the dynamo runs alternately at full output and then at no output, the total wear on the brushes is less in this way than if that machine were running… | ||
| Scan045 | Battery charging, overcharging, and maintenance procedures. | ||
| View original record | -7- suot switch, will be so to speak filled automatically not quite fully whenever necessary in much the same way that water is replaced, not quite filling the tank, in a water supply tank, the level… | ||
| Scan046 | Performance and modification of an experimental auto charge control switch on chassis 14-EX. | ||
| View original record | To R. from EFC. c. PJ. E. g. Ev. Wor. EFC7/T12.12.27. AUTO CHARGE CONTROL SWITCH. YU005 As referred to in our EFC1/T10.12.27 we duly got the auto charge switch referred to on your chassis 14-EX. This… | ||
| Scan047 | Test results of different ignition contact point configurations and materials. | ||
| View original record | To R. from EFC. c. BJ. E. c. Ev. Wor. ORIGINAL EFC5/T12.12.27. X2894 X8692 IGNITION CONTACT POINTS. At the end of our EFC6/T29.11.27 we remarked that we were running the combination of scrubbing… | ||
| Scan048 | The testing of different scrubbing arm types and combinations on an experimental chassis. | ||
| View original record | -2- Contd. We now have running :- (1) A thinner scrubbing arm of the original long Lec. 2422 type, the thickness tapering from the support end down to the point end. (2) Original type scrubbing action… | ||
| Scan049 | Proposal for a new 'Sequence Starter 2B Scheme' and its various implementations on chassis 9-EX. | ||
| View original record | To R. from EFC. c. RJ. F. c. EV. Wor. EFC/C/12.12.27. SEQUENCE STARTER 2B SCHEME. X765513 X762573 We are now proposing to remove the old No.1 scheme from chassis 9-EX and have this replaced with a 2B… | ||
| Scan050 | The switchbox on the 14-EX model, noting its magneto function and additional earthing switch. | ||
| View original record | To R. from EFC. c. RJ. E. SWITCHBOX ON 14-EX. The switchbox on 14-EX has magneto in addition to battery on the first position, but there is the additional switch for earthing the magneto when not… | ||
| Scan051 | Prolonged testing and performance characteristics of a Bosch magneto for a 20 HP chassis. | ||
| View original record | To R. from EFC. c. BJ. E. c. IX. Wor. ORIGINAL BOSCH MAGNETOS FOR CHASSIS. F6/M2.12.27. X5790 X4568 A prolonged test of this Bosch magneto with jump spark distributor will be made if E. will kindly… | ||
| Scan052 | Magneto specifications and potential improvements for a 20 HP engine. | ||
| View original record | EFC1/T13.12.27. -2- Contd. The present specified range for the 20 HP. magneto is 58°. If we could have this figure reduced to say 40°, then we think that a magneto with the short cobalt magnets,… | ||
| Scan053 | Tests on modified cams to reduce the operational noise of a Watford EW6 Magneto. | ||
| View original record | To R. from EFC. c. EJ. E. c. Da. Ey. c. ROY. WATFORD EW6 MAGNETO. We are pursuing the question of reducing the noisiness of the make and break by using modified cams. We have already had some modified… | ||
| Scan054 | Experiments to determine the cause of noise in contact breakers and magnetos, focusing on cam shape and condenser discharge. | ||
| View original record | Contd. -2- EFC6/T13.12.27. noisiness Messrs. North in a letter to us remarked that they have made numerous experiments over a long period in their quiet room with cams of various shapes, running the… | ||
| Scan055 | Potential issue with a magneto's contact breaker lever causing noise and plans for further testing. | ||
| View original record | -3- Contd. Another point we have noticed which is the case on the last two magnetos received, is that the contact breaker lever is made quite slack on the pin and we think this may have some effect in… | ||
| Scan056 | Cover letter attaching a further report on noise reduction for a Watford ENG Magneto. | ||
| View original record | To R. from EFC. c. E. BJ. c. Da. Hy. c. Wor. EFCL/T14.12.27. WATFORD ENG MAGNETO: Further to our EFCG/T13.12.27, we now attach copy of a letter addressed to Messrs. North & Sons which is in the nature… | ||
| Scan057 | Letter to North & Sons Ltd. regarding noise tests on EW6 magnetos and issues with cams and armature. | ||
| View original record | COPY 13th December, 1927. EFC/T. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, Further to our letter EFC3/T. of the 12th inst. we have now done a little work on the very latest type… | ||
| Scan058 | The slow speed electrical performance of EW6 machines and a suggestion to use a larger air gap. | ||
| View original record | -2- The slow speed electrical performance of these EW6 machines (with the one exception stated) has been particularly good and it appears to us that you might with advantage from this point of view… | ||
| Scan059 | Results of a crankshaft modification test, comparing weight and stiffness. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. ORIGINAL CRANKSHAFT TESTS. X5010 We have carried out a test on a 20 HP. std. crankshaft with the ends of the webs modified to reproduce the… | ||
| Scan060 | Describing the Remy dynamo electrical equipment on a Stutz car. | ||
| View original record | To R. from EFC. c. RJ. E. c. Dn. BY. c. Wor. ORIGINAL EFC2/T16/12.27. ELECTRICAL EQUIPMENT ON STUTZ CAR. X3374 X4366 DYNAMO. (REMY). This is of the two-pole type with concentric armature and cast iron… | ||
| Scan061 | The design and function of a motor's brushes, commutator, and engagement mechanism. | ||
| View original record | -2- Contd. The third brush is adjustable for control of the major output. All brushes are of the same size and carried on radially pivoted arms. The brushes are very inaccessible. There are 28… | ||
| Scan062 | Detailed report on the switch, battery, and dual battery ignition system. | ||
| View original record | -3- Contd. The switch, though very crude, does not appear to have undergone very much burning at the two contact surfaces which are mutually connected by a bridging button held in contact with them by… | ||
| Scan063 | The condition of the ignition system and a description of the vehicle's lighting system. | ||
| View original record | -4- Contd. The contact breaker arms are insulated, and the fixed points earthed. One pair of points is found in fairly good condition and the other pair pitted and oxidised. Both ignitions are fed… | ||
| Scan064 | Issues with battery ignition distributor tracking and proposing further tests on a mushroom rotor. | ||
| View original record | To R. from EFC. c. BJ. E. c. By. Wov [handwritten] ORIGINAL [stamp] EFC3/T19.12.27. BATTERY IGNITION DISTRIBUTOR TRACKING. We think there can be no doubt, judging from the tests reported in our… | ||
| Scan065 | Advantages of different ignition coil designs with a nearly closed magnetic circuit. | ||
| View original record | To R. from EFC. c. BJ. BY. IGNITION COIL WITH NEARLY CLOSED MAGNETIC CIRCUIT. Technical No great advantage is shown on test, neither does there appear to be any reason in principle for an advantage,… | ||
| Scan066 | Continuation page describing the construction of a coil, its magnetic casing, and insulation. | ||
| View original record | -2- Contd. current. The construction of the coil with the inside secondary and outside primary is such that the circuit is largely closed by the magnetic casing into which the coil is finally sealed;… | ||
| Scan067 | Comparing the crankshaft stiffness of a Stutz car shaft to the 40/50 HP and 20 HP shafts. | ||
| View original record | To R: from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. ORIGINAL Hs/RmL/LG19.12.27. STUTZ CAR SHAFT. X4336 We have obtained the figures for the Stutz crankshaft stiffness. With all bearings, the… | ||
| Scan068 | General specification for the New Safety Stutz Car, including details on the engine, chassis, weight, and capacities. | ||
| View original record | To R. from HS/AJL. c. to SD. c. to K. c. to DY. ORIGINAL Hs/AJL1/LG20.12.27. THE NEW SAFETY STUTZ CAR. X4336 General specification. Straight 8 cyl. engine. Bore 3.250". Stroke 4.50" Cubic capacity… | ||
| Scan069 | Engine's design and condition after a 3000-mile test, including details on the cylinder head. | ||
| View original record | contd :- -2- An overhead camshaft, driving by 'silent' chain, is used; the cams being of the mushroom type, rubbing directly on the valve stem caps. Dual battery ignition is used; the system is by… | ||
| Scan070 | Detailed analysis and critique of a combustion head and valve gear design, with an accompanying blueprint diagram. | ||
| View original record | contd :- -3- The combustion head is cylindrical, no attempt at inducing turbulence being made. Fig.1. illustrates the shape of the combustion head, valve ports and valve gear. The valves are described… | ||
| Scan071 | Specification sheet detailing valve spring dimensions and camshaft construction and lubrication. | ||
| View original record | contd :- -4- Free length = 2.843" Dia. of wire = .190" 9 working coils, 2 half coils, one at each end ground square. Inside dia. top = .6719" " bottom = 1.015" Load for .500" deflection = 68 lbs.,… | ||
| Scan072 | Specifications for the cylinder block, crankcase, crankshaft, and pistons. | ||
| View original record | contd :- -5- CYL. BLOCK AND CRANKCASE. The cyl. block and crankcase is one castiron casting it is of extremely rigid though heavy construction. It weighs, complete with crankshaft bearings and caps… | ||
| Scan073 | Blueprint showing principal dimensions of a Stutz Crankshaft. | ||
| View original record | STUTZ CRANKSHAFT (PRINCIPAL DIMENSIONS) FIG. II SECTION ON A-B FLYWHEEL DIAM: 12.6875" DIMENSIONS ON DIAGRAMS: 1&8 2&7 3&6 4&5 5.32" 3.52" 2.50" 1.00" 20° 1.46" 2.375" 1.320 No 2 .650 LENGTH OF… | ||
| Scan074 | Technical description and blueprint of a Stutz connecting rod, with notes on connecting rods and camshaft drives. | ||
| View original record | contd :- -6- perfect circle scraper ring are provided, with no stops, the piston ring gaps are cut at 45°. The gudgeon pins float in the pistons and are located endways in the piston by spring snap… | ||
| Scan075 | Description of the engine's drive chain system and lubrication system. | ||
| View original record | contd :- -7- oil pump, ignition distributor water pump and dynamo (these from one sprocket) and also a transfer sprocket which carries the fan and a second sprocket on which the second driving chain… | ||
| Scan076 | Page describing the engine's oil rectifier, sump, pump, and induction system, with a diagram of the oil rectifier. | ||
| View original record | contd :- -8- feeds the spring shackles when the valve is opened by hand. Fig.V. is a diagrammatic view of the Wall oil Rectifier and is self-explanatory. A flow of exhaust gas is not definitely… | ||
| Scan077 | Page detailing the induction, water cooling, and ignition/electrical systems, including a diagram of a Stutz induction system. | ||
| View original record | contd :- STUTZ INDUCTION SYSTEM. EXHAUST PORTS FOR HOT SPOT HOT SPOT Fig VI of induction system used. The vertical twin riser pipes are generously exhaust-jacketted, the exhaust gas supply being… | ||
| Scan078 | Continued description of the electrical system, clutch, gearbox, chassis, and axles. | ||
| View original record | contd :- -10- advance of 17°. The electrical system is 6-volt throughout, the dynamo and cutout (Delco Remy) are in one unit. A Delco Remy flywheel starter is used; the pinion is engaged manually… | ||
| Scan079 | Page detailing specifications for the brakes, steering, and suspension systems. | ||
| View original record | contd :- -11- embodies nothing of exceptional interest. The pivot lean is 1° and the wheels lean outward from the vertical to the extent of 1°. A spring loaded cross steering tube is used giving a toe… | ||
| Scan080 | Page from a vehicle inspection report detailing chassis lubrication and required engine repairs. | ||
| View original record | contd :- -12- SUSPENSION CHASSIS LUBRICATION. Lubrication of the spring shackles is by Myers self lubricator described previously. fig. Vll illustrates the shackle arrangement. The side and cross… | ||
| Scan081 | List of weights for various parts of a Stutz car engine and other components. | ||
| View original record | STUTZ CAR - WEIGHT OF PARTS. ENGINE. lbs. ozs. Valve - inlet and exhaust..................... 4.761 Valve spring.................................. 3.621 Valve cap.....................................… | ||
| Scan082 | Diagrammatic sketch of a Stutz-Zenith carburettor. | ||
| View original record | V184. IDLING DISCHARGE HOLE AIR NOZZLE IDLING AIR ADJUSTMENT IDLING JET FLOAT FULCRUM PIN FLOAT NEEDLE VALVE RANGE COMPENSATOR PETROL FILTER DRILLED THROTTLE VALVE PRIMARY VENTURI ACCELERATING JET… | ||
| Scan083 | Blueprint diagram illustrating Stutz engine valve lift and timing. | ||
| View original record | STUTZ VALVE LIFT DIAGRAM. EXHAUST CAM LEADS INLET CAM BY 116° (CAMSHAFT). BOTH CAMS ARE THE SAME SHAPE. TAPPET CLEARANCE (RUNNING) = .028". VALVE DURATION WITH ABOVE CLEARANCE IS 230° (ON CRANKSHAFT).… | ||
| Scan084 | Blank document page with a purple ink stamp from the Derby print room. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM 19 DEC 1927 DERBY | ||
| Scan085 | Modifications to the 2A and 2B sequence starter schemes, including changes to teeth design for specific car models. | ||
| View original record | To R. from EFC c. BJ. E. c. Da. Hy. c. Wor. EFC6/T20.12.27. SEQUENCE STARTER 2A and 2B SCHEMES. 2A scheme as arranged in the first instance on 14-EX had 5º helical teeth with rounded ends; some… | ||
| Scan086 | Tyre noise tests comparing Dunlop, British Goodrich, and Goodyear tyres. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. DA. c. to BY. CWB. ORIGINAL DUNLOP TYRES. X.2679 X.4565 We have repeatedly tried to convince the Dunlop Rubber Co. that their triple stud balloon tyre tread… | ||
| Scan087 | Alarming tyre wear and high-speed steering wobble issues in American cars. | ||
| View original record | contd :- -2- A point of interest arose in the discussion as to the alarming tyre wear developing on the front wheels of many American cars due to hurried alterations made in wheel toe-in or transverse… | ||
| Scan088 | The initial bench testing of Splitdorf magneto No. 31545, comparing its performance against other manufacturers. | ||
| View original record | To R. from EFC c. E. BJ. c. Da. By. c. Wor. Rg, ORIGINAL EFC3/T22.12.27. SPLITDORF MAGNETOS TYPE SS:31545 and 15890. Of the above two magnetos No.31545 has been examined and tested on the bench, and… | ||
| Scan089 | Examination and testing report on a Splitdorf Magneto Type SS No. 31545 from a Curtiss Aero Engine. | ||
| View original record | WC.56. 22.12.27. SPLITDORF MAGNETO TYPE SS.No.31545. OFF CURTISS AERO ENGINE. We have had an opportunity of examining and testing the above and we give below a few points of design observed on this… | ||
| Scan090 | Design flaws and failures of a Splitdorf magneto's distributor rotor. | ||
| View original record | To R. from EFC. c. BJ. E. c. Da. Wor. c. Rg. By. ORIGINAL EFC1/T23.12.27. SPLITDORF MAGNETOS. (Further to our EFC3/T22.12.27). The worst feature of the design of this machine is the jump spark… | ||
| Scan091 | The performance and design flaws of a magneto, deeming it unsuitable for the Falcon engine. | ||
| View original record | Contd. -2- EFC/T23.12.27. placed inside the machine at an undesirable place. It would appear, therefore, that the engine has been latterly running mainly on the other magneto, though it is not… | ||
| Scan092 | Results of three tests on ignition contact points. | ||
| View original record | To R. from EFC. c. BJ. E. c. Bv. Wor. EFC4/T23.12.27. IGNITION CONTACT POINTS. Three further results are being sent for your inspection. One of these has run 10,000 miles on the bench with the old… | ||
| Scan093 | Testing a 10% gold 90% silver alloy for cutout contact points. | ||
| View original record | EFC4/T23.12.27. -2- Contd. turns out to be 10% gold 90% silver alloy, i.e. the same alloy that we are using for our cutout contact points. Accordingly we had a standard lever and screw fitted with… | ||
| Scan094 | Test results for a Weir type induction pipe for the Phantom model. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to EY. ORIGINAL Hs2/LG2.1.28. WEIR TYPE INDUCTION PIPE FOR PHANTOM. X8070 We have carried out tests with this and find the results so far shew it to be a… | ||
| Scan095 | Testing of a Hypoid Rear Axle, noting issues with Shatz type bearings and a proposal to change gears. | ||
| View original record | To R. from Hs. c. to BJ. Wor. ✓ c. to E. DA. c. to BY. ORIGINAL Hsl/LG2. 1.28. HYPOID REAR AXLE. X2066 We are running a car fitted with Hypoid gears which are 2" off centre. As regards silence, they… | ||
| Scan096 | Simplified sequence starter scheme, including patent questions and instructing a new design to the Experimental Shop. | ||
| View original record | To R. from EFC. c. BJ. E. c. By. Wor. ORIGINAL EFCL/T4.1.28. SEQUENCE STARTER SIMPLIFIED SCHEME. x7655B x8651 We have noted the remarks contained in your HL/M23.12.27 and will ask for the question of… | ||
| Scan097 | Enquiry to Bosch for a suitable magneto for the 20 HP chassis. | ||
| View original record | ORIGINAL To R. from EFC. c. E. RJ. c. Ev. Roy. EFC3/T11.1.28. BOSCH MAGNETO FOR 20 H.P. CHASSIS. The result of our enquiry of Bosch as to whether they make a suitable magneto for the 20 HP., i.e. with… | ||
| Scan098 | The production difficulties and unsatisfactory results in manufacturing a worm and nut for a free steering system. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to EY. ORIGINAL Hs1/LG13.1.28. .900 LEAD LARGE DIAMETER NUT. +S430 This item has not been forgotten. Our trouble so far is that we cannot obtain a free… | ||
| Scan099 | Preliminary cold distribution tests conducted on Weir type induction pipes for the Phantom model. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to RG. E. c. to BY. OY. ORIGINAL Hs/ACL1/LGL3.1.28. WEIR TYPE INDUCTION PIPES ON PHANTOM AND GENERAL DISTRIBUTION. X8070 We have carried out some preliminary cold… | ||
| Scan100 | Proposed tests to improve fuel distribution by lowering the carburettor position by lengthening the weir pipe bend. | ||
| View original record | contd :- -2- to the single cast weir pipe, and so lowering the carburetter, the mix distribution was improved and the disturbing effect of the throttle position was lessened. With both these systems… | ||
| Scan101 | Induction pipe design, carburettor performance, and fuel distribution issues, specifically mentioning the 10-EX and Phantom models. | ||
| View original record | contd :- -3- dimsnsions for the slot and projecting lip in the distributing pipe. From a production point of view the built up pipe is preferable and we think that more consistent results will be… | ||
| Scan102 | Engine manifold design, comparing six-port and four-port systems for improved fuel distribution. | ||
| View original record | contd :- -4- or less a straight path due to its inertia and becoming deposited at the inlet valve of one cyl. during the inspiration of the adjacent cylinder. For this reason we have favoured the six… | ||
| Scan103 | Further tests on carburettors and induction systems for the 10-EX, Phantom, and Silver Ghost models. | ||
| View original record | contd :- -5- to the built up type. The projecting lip feature at the slot improves the distribution. Further tests are being made with the object of developing the built up type in conjunction with… | ||
| Scan104 | Experimental results from testing various combinations of features for tungsten ignition contact points. | ||
| View original record | To R. from EFC. c. BJ. E. c. Ev. Wor. ORIGINAL EFC1/T14.1.28. TUNGSTEN IGNITION CONTACT POINTS. X2894 X8692 In our EFC6/T29.11.27 we put down four experimental features,(see slip) which we were trying… | ||
| Scan105 | Summary of conclusions from a series of tests on distributor components, comparing performance with and without a scrubbing action. | ||
| View original record | Contd. -2- EFC1/T14.1.28. The conclusions to be drawn from this series of tests is that in spite of the fact that we had previously determined that the removal of the distributor was no advantage… | ||
| Scan106 | Continuation of a report on experimental tests of tungsten points and ignition coils. | ||
| View original record | -3- Contd. No.14 is a further and final test on tungsten points run with the maximum value condenser, but otherwise old standard conditions. No.41 has been run with the U.S.A. Bosch central H.T. coil… | ||
| Scan107 | Main switch magnet circuit and interlock system for a Super Sports sequence starter. | ||
| View original record | To R. from EFC. c. By. E. c. BJ. Da. c. Mr. Claremont. EAC.10. SUPER SPORTS. SEQUENCE STARTER. We have your HL/M9.1.28. We note in your paragraph dealing with the B. or main switch magnet circuit, you… | ||
| Scan108 | Continued discussion on carbon contacts, electrical and mechanical interlocks, and motor armature operation. | ||
| View original record | Contd. -2- EFC3/T14.1.28. carbon contacts to accommodate this. It would appear that the carbon contacts provided with the electrical interlock were not necessary. There is, with the mechanical… | ||
| Scan109 | Tests of three new exhaust manifold designs against the standard manifold on a 20 HP engine. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to E. D&. c. to CY. BY. ORIGINAL 20 HP. RR. EXHAUST MANIFOLDS. XP230 We have carried out tests on the 20 HP. engine with the three new exhaust manifolds - schemes… | ||
| Scan110 | Report discussing power loss in a standard manifold and comparing experimental designs with sketches. | ||
| View original record | contd :- -2- The reason the std. manifold gives such a considerable power loss - in this case 10 HP. at 3200 r.p.m. or 13½% - we consider is due to the opposing direction of the gas flow from each of… | ||
| Scan111 | Note on increasing the pipe diameter of an experimental manifold to improve unidirectional flow. | ||
| View original record | contd :- -3- of Sch.935 which would give a unidirectional flow into the downpipe. We consider also that the inside diameter of the pipes could be increased with advantage - at present on this… | ||
| Scan112 | Performance graph comparing various experimental exhaust manifolds against a standard manifold and open exhausts on a 20 HP engine. | ||
| View original record | 20 HP EXPERIMENTAL EXHAUST MANIFOLDS. TESTS MADE ON 20 H.P. ENGINE COMPN RATIO 5.45/1. STD. CYL. HEAD & VALVES. LONG DURATION CAMSHAFT. ZENITH T.D. CARBURETTER (1). B.H.P. R.P.M. B.M.E.P. lbs/sq" OPEN… | ||
| Scan113 | Almost entirely illegible document with a purple ink stamp from the print room. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 17 JAN 1928 DERBY. | ||
| Scan114 | Performance report on a Stutz car, detailing specifications and road behaviour. | ||
| View original record | To R: from Hs/AJL c. to B.J. Wor. c. to E. DA. c. to BY. ORIGINAL! Hs/AJL1/LG18.1.28. STUTZ CAR - PERFORMANCE. YU336 The following particulars were not given in the previous report :- Volume of… | ||
| Scan115 | Test report on the performance of the gearbox, rear axle, brakes, and self-starter. | ||
| View original record | -2- Kontd :- movement. The effort required to disengage the clutch is small. The gearbox gears are not good. The 1st. and 2nd. speed gears are decidedly noisy, but the constant mesh gears are good and… | ||
| Scan116 | Engine noises and general engine behaviour. | ||
| View original record | contd :- -3- is not released immediately the engine commences to run under its own power; the pinion is not released from the flywheel gear until the operating pedal is released. Engine noises. The… | ||
| Scan117 | Report page detailing engine performance, including speed, gearing, carburation, temperature and detonation. | ||
| View original record | contd :- -4- running; the most noticeable one is at 37 m.p.h. 1900 r.p.m. on top gear when pulling. The period is of very short duration and it was definitely more pronounced when the car arrived,… | ||
| Scan118 | Performance comparison report between a Stutz and a Phantom, including an acceleration graph. | ||
| View original record | contd :- -5- tune The quick loss of engine tune due to the poor method of locking the valve clearances spoils an otherwise very nice engine, as soon as tappet noises commence one is aware that the car… | ||
| Scan119 | Performance comparison of a Stutz versus a Phantom, including an acceleration graph and hill climb test results. | ||
| View original record | contd :- representing a total weight with passengers of 2.97 tons as against 2.4 tons for the Stutz. The Phantom figures are those necessary for passing the pro- duction quality test. -6- Graph:… | ||
| Scan120 | Graph of Engine RPM vs Road Speed for a New Safety Stutz (1927) 8 Cylinder car. | ||
| View original record | NEW SAFETY STUTZ (1927). 8 CYLINDER. ENGINE R.P.M. FOR ROAD SPEED. EFFECTIVE CIRCUMFERENCE OF ROAD WHEEL AT 35 Lbs/sq in PRESSURE = 98". GOODRICH SILVERTON 32x6.20" TYRES FITTED. GEAR RATIOS:- TOP… | ||
| Scan121 | With almost completely faded text, featuring a purple print room stamp. | ||
| View original record | The main body of the document text is too faded to be legible. Stamp text: ROLLS-ROYCE, LIMITED PRINT ROOM, 5 JAN 1928 BY. | ||
| Scan122 | Performance comparison between a Phantom and a Stutz vehicle, detailing tractive resistance, fuel consumption, and suspension qualities. | ||
| View original record | contd :- -7- The results indicate that the Phantom is superior to the Stutz at low speed full throttle work viz: Stanton and Pistern hills, but the Stutz is very slightly superior at the higher speeds… | ||
| Scan123 | Continued report page detailing road test comparisons and dynamometer brake horsepower results for a Stutz vehicle. | ||
| View original record | contd :- -B- favourable comparison with our 20 HP. and that is between 20 and 30 m.p.h. over a really bad pot-holey road. The Stutz is a trifle steadier. When sitting in the driving seat one gets the… | ||
| Scan124 | Blueprint graph comparing the B.HP at road wheels of the Phantom and Stutz cars against road speed. | ||
| View original record | contd :- -9- in spite of its very low gear ratio. The engine suffered no appreciable damage or loss of power during the short test that it received. Graph: ENGINE R.P.M (STUTZ ONLY) B.H.P. AT ROAD… | ||
| Scan125 | Performance comparison between a Stutz car and a Rolls-Royce Phantom, analyzing M.E.P. and displacement. | ||
| View original record | Hs/Rn/LG20.1.28. STUTZ CAR. ---------- It is interesting to note in connection with the attached report that the Stutz gives better acceleration because of its greater engine efficiency, not because… | ||
| Scan126 | Radiator flow impairment caused by slime and hard water precipitates, detailing a cleaning solution and a change in tube design. | ||
| View original record | To. Mr F.R.H R.E.H. etc. (Crossed out) C. to Mr. H.I.G. W.O.R. (Crossed out) C. to Mr. A.F.S. (Crossed out) C. to Mr. W.G. (Crossed out) ORIGINAL RADIATORS. X8250 X4681 We find that the car radiators… | ||
| Scan127 | The testing schedule and experimental modifications for the Continental Phantom. | ||
| View original record | To R. from Hs. c.c. to EJ. WOF. c.c. to E. DA. c.c. to RG. BY. ORIGINAL Hs6/LG2D,1.28. X 8774 X4463 CONTINENTAL PHANTOM. We anticipate having the first complete car of this type in France about Jan.… | ||
| Scan128 | Car modifications including a slipper wheel and pistons, before proceeding to Le Canadel for testing. | ||
| View original record | contd :- -2- (10) Modified slipper wheel. (11) Modified pistons. This car will also proceed to Le Canadel before any tests commence. Hs. | ||
| Scan129 | The introduction and suitability of 'Ethyl' petrol containing T.E.L. dope. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to RG. E. c. to DA. BY. c. to Hm. MX. c. to Cx. ORIGINAL. Hsl/LG21.1.28. Y3113 X1555 "ETHYL" PETROL. The Anglo American Oil Co. are now widely advertising and are… | ||
| Scan130 | Investigation into the cause of a periodic 'galloping knock' in an engine. | ||
| View original record | To R. from His/GWH. c. to BJ. Wor. c. to RG. H. c. to EY. OY. ORIGINAL Hs/GWH/LG23.1.28. INVESTIGATION OF GALLOPING KNOCKS. X8020 XL417 This is a complaint that has been prevalent and complained of by… | ||
| Scan131 | Investigation into an engine knock, detailing tests on a slipper wheel and identifying the cause. | ||
| View original record | contd :- -2- considerably reduced and was sufficient to prevent crankshaft periods being objectionable. We then tried a heavier slipper wheel by bolting an extra rim on to the existing wheels. This… | ||
| Scan132 | Analysis of torsional strain and engine knock relating to the crankshaft and slipper wheels. | ||
| View original record | contd :- -3- (up to a certain load) and over run or wind up the crankshaft, until the maximum torsional strain is reached. The speed of the slipper wheels then overcome the friction and slip, thereby… | ||
| Scan133 | The examination and testing of Lucas type ER6 chassis magnetos. | ||
| View original record | To R. from EFC. c. BJ. E. c. BY. Wor. c. Da. Roy ORIGINAL EFC2/T24.1.28. LUCAS TYPE ER6. CHASSIS MAGNETOS. Attached will be found a copy of my assistant's report WC.66 dealing with the examination and… | ||
| Scan134 | The testing and examination of a Lucas ER6 Magneto from Chassis 7-EX after a 14,000-mile run. | ||
| View original record | EFC. WC.66. 21.1.28. LUCAS ER6 MAGNETO NO.54A EX CHASSIS 7-EX. This magneto has now been returned to the laboratory after running nearly 14,000 miles on chassis 7-EX which was used by R. at Le… | ||
| Scan135 | Torque reaction difficulties on a sports car, focusing on camshafts and engine mounting solutions. | ||
| View original record | To R. from Hs/Rn. c. to BJ. Wor. c. to E. DA. c. to BY. OY. ORIGINAL Hs/Rml/LG30.1.23. TORQUE REACTION. X8005 The most noticeable difficulty that we have encountered on the sports car is that of… | ||
| Scan136 | The difficulties with damping engine torque reaction and chassis vibration, specifically mentioning the Continental Phantom. | ||
| View original record | contd :- -2- (d) Damping. We have tried various types of damping. The present torque reaction dampers are definitely of assistance. The amount of damping we can use, however, is very small or the… | ||
| Scan137 | Performance feedback on the Continental Phantom model. | ||
| View original record | To R. from Hs/MM. c. to BJ. Wor.✓ c. to E. DA. c. to BY.✓ CWB. EN. to FN. EP. ORIGINAL CONTINENTAL PHANTOM. X8774 X S770 Our views on this car are as follows. We think * that we shall be worse off… | ||
| Scan138 | Performance comparison between a sports engine and a standard engine, covering aspects like noise, running, acceleration, suspension and braking. | ||
| View original record | contd :- -2- (5) Silence. The sports engine will be more audible than the standard engine owing to the louvred bonnets that must be fitted. We think that we shall be as good as the standard car for :-… | ||
| Scan139 | The steering, control, and maximum speed of the Continental Phantom. | ||
| View original record | contd :- -3- (5) Steering and control generally. Owing to the low centre of gravity of this car due to the body design and the type of road springs employed (the c. of g. is now 5" below the top of… | ||
| Scan140 | Vehicle performance including speed tests at Brooklands, axle ratios, starting from cold, and gear changes. | ||
| View original record | contd :- -4- on any car with reasonable safety to ourselves and the public. Though maximum speed can be used for appreciable periods on the Continent, it can seldom be reached in England. The reason… | ||
| Scan141 | The results of bench tests on tungsten contact points using different anvils and coils. | ||
| View original record | To R. from EFC. c.c. HJ. Wor. c.c. E. By. c.c. De. EFC4/TY.2.28. ORIGINAL TUNGSTEN CONTACT POINTS. x8692 Further to our EFC1/T14.1.28, the test of tungsten points run 10,000 miles on the bench with a… | ||
| Scan142 | Report comparing the crankshaft vibrations of a Stutz engine with those of a 20 HP engine. | ||
| View original record | To R. from Hs/Rm. c. to BJ. WOT. c. to E. RG. c. to BY. OY. ORIGINAL Hs/Rm2/LCS.2.28. STUTZ ENGINE VIBRATIONS. /4336 We have been carefully comparing the Stutz crankshaft periods on the road with… | ||
| Scan143 | Comparison of engine performance, focusing on vibrations, acceleration, and efficiency across different engine types. | ||
| View original record | contd :- -2- approaching full throttle. We shall be very interested to compare the 20 HP. and 40/50 units with stiffened crankshafts, with this engine. Our general impression at present is that the… | ||
| Scan144 | Crankshaft torsional vibrations in 6, 8, and twin-6 cylinder engines. | ||
| View original record | Hs/Tsn1/LG8.2.28. CRANKSHAFT TORSIONAL VIBRATIONS. 6, 8 & TWIN-6 ENGINES. It is possible to obtain a rough idea of the severity of torsional vibrations to be expected in the above three types of… | ||
| Scan145 | Mathematical expressions for calculating total engine torque and analyzing harmonics for various cylinder configurations. | ||
| View original record | contd :- -2- T = A + B sin 1/2 wt + C sin 2/2 wt + D sin 3/2 wt + E sin 4/2 wt + F sin 5/2 wt + --- etc. Where A is the mean torque for one cylinder and is the only part of the above expression… | ||
| Scan146 | Comparison of resonating harmonics and torsional periods for 6-cylinder, straight-eight, and twin-six engines. | ||
| View original record | contd :- -3- are resonating at the various torsional periods. RESONATING HARMONICS. 6-cylinder. Period. Inertia torque. Gas torque. Cycles per rev. 3300 3rd + 246 lbs.ft. 6th. 37 lbs.ft. 3 2200 9th.… | ||
| Scan147 | Comparison of torsional vibration, roughness, and crankshaft stiffness for six-cylinder, straight-eight, and twin-six engines. | ||
| View original record | contd :- -4- Other variables being omitted, in engines without dampers, the amplitude and severity of torsional vibration in the shaft at a critical period will vary directly as the disturbing torques… | ||
| Scan148 | Analysis of crankshaft stiffness and torque variations for straight-eight and twin-six engines. | ||
| View original record | contd :- -5- per rev. In a straight-eight there would be four per rev.. owing to the four torque variations instead of three. This means that to retain the period at 3300 r.p.m. where the 20 HP.… | ||
| Scan149 | Experiments with hydraulic shock dampers, discussing the effects of oil temperature and viscosity on pressure. | ||
| View original record | To R. from Hs/Rn. c. to BJ. Wor. c. to DA. BY. c. to CY. ORIGINAL. Hs/Rml/LGS.2.28. HYDRAULIC SHOCK DAMPERS. X235 14-EX is running with shock dampers having restrictions as indicated in our… | ||
| Scan150 | Continued discussion on pressure velocity factors, damper loading, and low-pressure passages. | ||
| View original record | contd :- -2- only that if a considerable pressure velocity factor is contemplated the low pressure passage might with advantage be made more tortuous. Graph 11. shews that quite a large pressure… | ||
| Scan151 | Graph of pressure versus piston velocity for a standard shock damper, showing performance variations with temperature. | ||
| View original record | GRAPH I PRESSURE LBS/sq in % VARIATION NORMAL TEMPS: 16% % VARIATION EXCEPTIONAL TEMPS: 45% AVERAGE VEL: PISTON VEL: INS/SEC. STANDARD TYPE OF SHOCK DAMPER PASSAGES DIA: H.P. PASSAGE .172 DIA: L.P.… | ||
| Scan152 | Blank page with a purple ink stamp from the Derby Print Room. | ||
| View original record | PRINT ROOM, 8 . FEB 1928 DERBY. | ||
| Scan153 | Graph plotting pressure against piston velocity under various air temperatures, with a diagram illustrating passage design. | ||
| View original record | GRAPH II MAX: PISTON VEL: % VARIATION NORMAL TEMPS: 6% % VARIATION EXCEPTIONAL TEMPS: 20% PRESSURE LBS / D" AVERAGE VEL: PISTON VEL: INS/SEC AIR TEMP -10°C. +10°C } NORMAL TEMP VARIATION +25°C +40°C.… | ||
| Scan154 | Blank page with a 'Print Room' reception stamp from Derby. | ||
| View original record | ROYCE, LIMITED PRINT ROOM, 8 FEB 1928 DERBY. | ||
| Scan155 | Test results for a 9.5' pendulum lever on a heavy closed standard car. | ||
| View original record | To & from Hs/Rm. [text struck through] c. to EST. Weir. [text struck through] c. to DA. BY. c. to OY. Hm. Hs/Rm2/LG9. 2. 28. Hs. absent. ORIGINAL 9.5" PENDULUM LEVER. X8430 [handwritten] X7420… | ||
| Scan156 | Updated diagram for an autocharge control switch, including revised winding directions. | ||
| View original record | To R. from EFC. c. BJ. E. c. Da. PN. c. CWB. By. c. Wor. Oy. AUTOCHARGE CONTROL SWITCH In our EFC3/T30.11.27 we remarked that we felt it would ultimately be your desire to have the auto switch unit… | ||
| Scan157 | Wiring and improvements of an auto switch unit. | ||
| View original record | In this combined unit we have, in accordance with previous explanations, shown both shunt coils supplied with positive current from distribution box terminal C which normally supplies the field… | ||
| Scan158 | Follow-up discussion on road testing the auto switch and dynamo, and consideration of a patent. | ||
| View original record | EFC2/T9.2.28. -3- Contd. taken in regard to the obtaining of a patent for this piece of apparatus. In our EFCL/T2.12.27 we mentioned a point which we thought at that time might be a small snag, viz.… | ||
| Scan159 | Investigations into the Midgley unit and a temperature-related snag with the auto switch system's shunt coil. | ||
| View original record | EFC2/T9.2.28. -4- Contd. As indicated in EFC5/T5.12.27, we did make further investigations of the Midgley unit in order to get more familiar with the working of same, in the light of our new… | ||
| Scan160 | Adjustment of an auto switch for battery charging voltage and performance under different conditions. | ||
| View original record | EFC2/T9.2.28. -5- Contd. This means that the switch must be adjusted to use a comparatively early part of the final pick-up of battery charging voltage instead of the later portion, and the query… | ||
| Scan161 | The functionality and operating parameters of an auto switch dependent on battery voltage rise. | ||
| View original record | -6- Contd. "The functioning of our auto switch depends upon the final rise of voltage. We would like the operating point to occur in the later stages of this pick-up in order to feel that the battery… | ||
| Scan162 | Battery overcharging issues, vibrator regulators, and the development of a 6-volt auto switch unit. | ||
| View original record | EFC2/T9.2.28. -7- Contd. (3) Although the unit obviously must be an advantage in reducing overcharging troubles, loss of electrolyte, etc. it would appear that a considerable amount of time must… | ||
| Scan163 | The satisfactory performance of auto switches in experimental cars. | ||
| View original record | EFC2/T9.2.28. -8- Contd. The auto switches which we have on experimental cars are working quite satisfactorily and doing all that is expected of them. There appears to be no reason why the units… | ||
| Scan164 | Wiring diagram for a distribution board with a cut-out and auto switch. | ||
| View original record | [ "DISTRIBUTION BOARD", "WITH", "CUT OUT & AUTO SWITCH.", "AUTO SWITCH", "RES. COIL.", "SHUNT.", "CUT OUT", "SERIES.", "EARTH", "C F+", "A D-", "B D+", "DYNAMO", "IGNITION", "LAMPS", "KLAXON & BODY… | ||
| Scan165 | Blank page with a purple date stamp from the Derby Print Room. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 9 FEB 1928 DERBY. | ||
| Scan166 | Wiring diagram illustrating the connections of auto-switch units. | ||
| View original record | [ "TO DYNAMO", "TERMINAL. C.", "TO EARTH", "FROM", "DIS: BOX", "TERMINAL C", "FROM", "DIS. BOX", "TERMINAL B.", "RESIS. WINDING", "SHUNT WINDING", "N", "CONNECTIONS", "OF", "R.R. AUTO-SWITCH UNITS.",… | ||
| Scan167 | Stamped page with largely unreadable typewritten content. | ||
| View original record | The main body of the document is illegible. [Stamped text] 9 FEB 1928 DERBY. | ||
| Scan168 | Miscellaneous points on the auto charge control switch, focusing on an extra coil for protection. | ||
| View original record | To R. from EFC c. BJ. E. c. Da. PN. c. CWB. By. c. Oy. WOr. ORIGINAL AUTO CHARGE CONTROL SWITCH. Miscellaneous further points. X4008 (1) Extra coil for extra protection. As explained the auto switch… | ||
| Scan169 | Experiment with a fourth wire for added protection to the dynamo auto switch, and a discussion on temperature effects. | ||
| View original record | -2- Contd. coils of the auto switch and the control brush of the dynamo. The practical difficulty at once apparent about this is that it means a fourth wire from the dynamo (to the auto switch) and… | ||
| Scan170 | Temperature compensation for battery charging, considering the use of a bi-metal strip and a series coil. | ||
| View original record | -3- Contd. Both these effects work the same way in varying the point of operation of the auto switch for the same condition of charge of the battery when everything is hot as compared with when… | ||
| Scan171 | Improving the temperature compensation of a main shunt coil. | ||
| View original record | -4- Contd. Therefore, as the auto switch stands at present, the principal requirement in the direction of greater perfection would appear to be the temperature compensation of the main shunt coil. We… | ||
| Scan172 | The noisiness of Watford EW6 magnetos and investigations into using modified cams to reduce it. | ||
| View original record | To E. from EFC. c. BJ. E. c. Da. Ry. c. Wor. EFCL/T11.2.28. p.2 ORIGINAL WATFORD EW6 MAGNETOS. X7791 X8793 In our last report EFC6/T13.12.27, we stated that we were pursuing the question of noisiness… | ||
| Scan173 | The testing of EW6 magnetos for noise issues, detailing the causes and results from experimental machines. | ||
| View original record | -2- Contd. these machines back to alter the cams in accordance with our suggestions. Since the time of writing EFC6/T13.12.27 in which reference was made to the EW6 magneto. No.100080 on 14-EX which… | ||
| Scan174 | Noise testing results for modified contact breaker levers and various magnetos. | ||
| View original record | -3- Contd. "In addition to the above, one of the suggested modified type of contact breaker lever was tried on each of two of the above machines in turn, in order to see if noisiness was affected by… | ||
| Scan175 | Noise and operating force issues with magnetos, comparing different machine types and proposed solutions. | ||
| View original record | EPCl/Tll.2.28. -4- Contd. to his satisfaction. When a particularly quiet machine is wanted for some special purpose, one of our Lucas machines is asked for. It has been suggested that Messrs. North… | ||
| Scan176 | The design and performance issues of six magnetos, focusing on distributor rotor location and timing variations. | ||
| View original record | EFCL/T11.2.28. -5- Contd. A point we have noted on these six magnetos is that the angular location of the distributor rotor is now made by means of a stud let into the bakelite wheel engaging a hole… | ||
| Scan177 | The performance and durability testing of Lucas magneto machines, comparing tungsten and platinum contact points. | ||
| View original record | -6- Contd. of the remainder which were tested, showed a considerably less good retard low speed performance. We do not see good reason for easing our production test specification, as we find that the… | ||
| Scan178 | Test report on an A-C petrol pump, comparing its performance to the Autovac for the Phantom model. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. Da. c. to BY. ORIGINAL Hs/Rm3/LG16.2.28. A-C PETROL PUMP. X2677 We have run off a test on the A-C petrol pump. We confined this test as nearly as possible to… | ||
| Scan179 | Performance graph of an A.C. petrol pump showing delivery rate versus engine RPM under specific test conditions. | ||
| View original record | A.C. PETROL PUMP. A.C. PETROL PUMP DELIVERY. PHANTOM CONSUMPTION FULL THROTTLE. GALS/MIN ENGINE R.P.M. A.C. PUMP & FILTER. CONDITIONS FOR TEST. PIPING STANDARD ·240" INSIDE DIA. SUCTION PIPE 172" LONG… | ||
| Scan180 | Mostly illegible typed document with a purple ink stamp from the Print Room, Derby. | ||
| View original record | ROLLS-ROYCE LTD PRINT ROOM, 17 FEB 1928 DERBY. | ||
| Scan181 | Report comparing the performance and design of single-piece and two-piece weir type induction pipes. | ||
| View original record | To R. from Hs/ACL. c.c. to BJ. Wor. c.c. to E. DA. c.c. to BY. OY. ORIGINAL Hs/ACL1/LG1 7.2.28. WEIR TYPE INDUCTION PIPES. X8070 We have made further tests with the two weir type induction pipes on an… | ||
| Scan182 | Report comparing different manifold and carburetter designs, including sketches and test results for models EAC.10 and EAC.14. | ||
| View original record | contd :- -2- With the built up pipe the connecting passage between carburetter and manifold changes its section much earlier and the change of section from circular to slotted is more gradual. It… | ||
| Scan183 | Summary of road tests on different engine induction and manifold systems for the Phantom model. | ||
| View original record | contd :- -3- Most of the road tests have been made with the usual exhaust hot spot but without the butterfly baffle in the down pipe and we have found that smooth operation of the engine can be… | ||
| Scan184 | Optimal driving position and steering column options for the Continental Phantom. | ||
| View original record | To R. from Hs/Rn. c.c. to BJ. Wor. c.c. to E. DA. c.c. to EY. OY. ORIGINAL Hs/Anl/LG1 8.2.28. CONTINENTAL PHANTOM - DRIVING POSITION. X8774 +8430 We consider that it is of primary importance that the… | ||
| Scan185 | Tests of Weir type induction pipes for the Lighter Phantom engine. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to E. DA. c. to EY. CY. ORIGINAL. Hs/ACL1/LG20.2.28. TESTS OF WEIR TYPE INDUCTION PIPES +8070 FOR LIGHTER PHANTOM. Two types of induction pipe were tested :-… | ||
| Scan186 | Comparison of power and distribution from three tests on induction pipe, fishtail, and hot spot pipe configurations. | ||
| View original record | contd :- -2- TEST A. Induction pipe, fishtail and hot spot pipe to Sch. 965. Power : More power is obtained when pipe containing nozzle is used, than with the other; but both pipes give more power… | ||
| Scan187 | Power and distribution tests for different induction and carburetter arrangements. | ||
| View original record | contd :- -3- TEST D. Induction pipe and fishtail to Sch.981. Hot spot pipe to V.233 (this hot spot pipe gives standard position for carburetter). Power : With this arrangement power is well below… | ||
| Scan188 | Performance graph comparing three different Weir induction pipe configurations by plotting Brake Horse Power and Brake Mean Effective Pressure against engine RPM. | ||
| View original record | WEIR INDUCTION PIPES TESTS. SHEET I. V252. ① { INDUCTION PIPE & FISHTAIL (WITH NOZZLE) TO SCH. 965. (ONE PIECE PIPE) HOT SPOT PIPE TO SCH. 965. ② DITTO, BUT WITHOUT NOZZLE IN FISHTAIL. ③ STANDARD… | ||
| Scan189 | Blank page marked with a departmental date stamp from the Derby factory. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 20 FEB 1928 DERBY. | ||
| Scan190 | Performance graph comparing Brake Horse Power and Brake Mean Effective Pressure against RPM for various Weir induction pipe setups. | ||
| View original record | WEIR INDUCTION PIPES TESTS. SHEET II ④ { INDUCTION PIPE & FISHTAIL (WITH NOZZLE) TO SCH. 965. (ONE PIECE PIPE). HOT SPOT PIPE TO V243 (CARB. IN STD. POSITION). ⑤ DITTO, BUT WITHOUT NOZZLE IN FISHTAIL.… | ||
| Scan191 | Graph plotting Brake Horse Power and Brake Mean Effective Pressure against engine RPM for different Weir induction pipe tests. | ||
| View original record | WEIR INDUCTION PIPES TESTS. SHEET III V254. ⑥ { INDUCTION PIPE & FISHTAIL (WITH SERRATED NOZZLE) TO SCH. 980 (BUILT-UP PIPE) HOT SPOT PIPE TO SCH. 980. ⑦ DITTO, BUT WITHOUT NOZZLE IN FISHTAIL. ③… | ||
| Scan192 | Graph comparing performance tests of various Weir induction pipes, plotting BHP and BMEP against engine RPM. | ||
| View original record | WEIR INDUCTION PIPES TESTS. SHEET IV. V255. ⑧ { INDUCTION PIPE & FISHTAIL (WITHOUT SERRATED NOZZLE) TO SCH. 980 (BUILT-UP PIPE), HOT SPOT PIPE TO V233. (CARB. IN STD. POSITION) ⑨ { INDN PIPE &… | ||
| Scan193 | Mostly blank page with a purple date stamp at the bottom right. | ||
| View original record | LIMITED M, 20 FEB 1928 DERBY. | ||
| Scan194 | Performance comparison report on the 'Continental' Phantom model against the standard car. | ||
| View original record | To R. from Hs/Rn. c. to BJ. Wor. c. to E. Da. c. to BY. PN. c. to EP. CWB. c. to Na. OY. ORIGINAL Hs/RnL/LG23. 2. 28. X8774 X788 X8771 X3531 "CONTINENTAL" PHANTOM. We have now had sufficient… | ||
| Scan195 | Sports car performance, customer expectations, and comparisons with competitor vehicles like Vauxhall, Sunbeam, and Bentley. | ||
| View original record | -2- contd :- mile, actually the final car is rather better than this. We believe that under modern traffic conditions this feature of a quick get-away will appeal to the owner a great deal more than a… | ||
| Scan196 | Performance comparison of the Continental Phantom against competing cars and a discussion on its body design. | ||
| View original record | contd :- -3- half a mile to attain speed before commencing the timed stretch. The three Vauxhalls did the half mile at 81.8, 78.2 and 75.6 m.p.h. respectively. Mr. Summers on 117-MC a standard Phantom… | ||
| Scan197 | List of technical advantages for a new rear-end design on fast cars, referencing the Continental Phantom. | ||
| View original record | contd :- -4- purely due to the undoubted technical advantages offered thereby and so great are these advantages, which we enumerate below, that we feel convinced it is bound to become the conventional… | ||
| Scan198 | Performance graph comparing the Standard and Sports Phantom engines, showing Brake Horse Power and Brake Mean Effective Pressure against RPM. | ||
| View original record | COMPARISON OF STANDARD & SPORTS PHANTOM ENGINES. STD. ENGINE COMP. RATIO = 4.1 FLAT CYLINDER HEAD. STD. INDUCTION PIPE SPORTS ENGINE COMP. RATIO = 4.75 ANTI-DETONATING CYL. HD. WEIR INDN PIPE (SCH… | ||
| Scan199 | Blank document with a date stamp from the print room. | ||
| View original record | ROYCE, LIMITED PRINT ROOM, 23 FEB 1928 DERBY. | ||
| Scan200 | Graph comparing the acceleration performance of Standard and Continental Phantom models. | ||
| View original record | ACCELERATIONS STANDARD V CONTINENTAL PHANTOM STANDARD 2.35 TONS 15 x 52 AXLE 4.0-1 COMP RATIO CONTINENTAL 2.1 TONS 16 x 52 AXLE 4.75 COMP RATIO ALL TESTS C.O. OPEN 3RD GEAR TOP GEAR ACCELERATION… | ||
| Scan201 | Blueprint graph showing the top gear performance comparison between Standard and Continental models. | ||
| View original record | TOP GEAR PERFORMANCE STANDARD BODY. OPEN TOURING 5 SEATER CONTINENTAL. STREAMLINE 4 SEATER MAX SPEED 86.5 M.P.H. TOP GEAR MAX SPEED 76.5 M.P.H. TOP GEAR 3RD GEAR CAR SPEED M.P.H. TIME SECS CONTINENTAL… | ||
| Scan202 | The reverse side of an archival document with a reference label and a print room stamp. | ||
| View original record | RR 68 (250T) (DB 925 8-5-25) J.H.D. ROLLS-ROYCE, LIMITED PRINT ROOM 23 FEB 1928 DERB | ||
| Scan203 | Standard and experimental loadings for hydraulic dampers on Phantom & 20 HP models. | ||
| View original record | To R. from Hs/Rn. c. to BJ. Wor. c. to E. Da. c. to BY. OY. ORIGINAL Hs/Rn6/LG23. 2. 28. PHANTOM & 20 HP. - HYDRAULIC DAMPERS. X235 With reference to R2/M19.2.28. Ever since the introduction of these… | ||
| Scan204 | Axle control damper issue caused by foreign matter lodging in the valve seat and a suggested improvement. | ||
| View original record | contd :- -2- A trouble which we experience occasionally is for a minute piece of foreign matter to lodge on the valve seat and be forced into the alum. when the valve tries to close. This can put the… | ||
| Scan205 | 20 HP exhaust manifold performance, correcting a previously misnumbered diagram and discussing power output improvements. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. [crossed out] E. c. to DA. BY. [STAMPED: ORIGINAL] 20 HP. EXHAUST MANIFOLDS. [Handwritten: 523 O] In our previous report on the power output with the various exhaust… | ||
| Scan206 | Recommendation to produce a new low power loss manifold (Sch. 934) for the 20 HP chassis. | ||
| View original record | contd :- -2- than those with high losses. A low power loss manifold enables full advantage to be obtained from a 'cut out'. Considering that the new type manifold Sch. 934 is a distinct improvement… | ||
| Scan207 | Performance chart comparing various experimental exhaust manifolds against a standard manifold and open exhausts on a 20 HP engine. | ||
| View original record | 20 HP EXPERIMENTAL EXHAUST MANIFOLDS. TESTS MADE ON 20 H.P. ENGINE COMP'N RATIO 5.45/1. STD. CYL. HEAD & VALVES LONG DURATION CAMSHAFT. ZENITH T.D. CARBURETTER(1). B.H.P. R.P.M. B.M.E.P. lbs/sq" OPEN… | ||
| Scan208 | Blank page with a date and location stamp. | ||
| View original record | J.M. 24 FEB 1928 DERBY. | ||
| Scan209 | Blueprint showing three design variations for a 20 HP exhaust manifold. | ||
| View original record | 20 H.P. EXHAUST MANIFOLDS. THIS MANIFOLD GIVES THE BEST POWER OUTPUT. SEE POWER CURVES SCH 934. SCH 936. SCH 935. THE APPENDED CURVES SHOW THE POWER OUTPUT WITH THE MANIFOLDS SHEWN ABOVE acks 15/12/28 | ||
| Scan210 | Blank page with a 'Print Room' stamp from Derby. | ||
| View original record | LIMITED PRINT ROOM, 24 FEB 1928 DERBY. | ||
| Scan211 | Customer complaints regarding insufficient dynamo output at high speeds for 40/50 models. | ||
| View original record | To R. from EFC. c. BJ. E. c. BY. PN. c. Hm. Wor. EFC3/T27.2.28. ORIGINAL INSUFFICIENT DYNAMO OUTPUT AT HIGH SPEEDS. We have had several complaints (four, I think) all comparatively recently and two… | ||
| Scan212 | Dynamo performance limitations and a proposed experiment for a new armature winding. | ||
| View original record | -2- To R. from EFC. (Contd) EFC3/127.2.28. lamps. A dynamo of our present size which would be capable of covering such a night load at high speeds would be entirely unsuitable for the average car.… | ||
| Scan213 | Test report on a Park Royal Ammeter, detailing initial issues, re-testing, and subsequent performance. | ||
| View original record | To R. from EFC. c. BJ. E. c. By. ORIGINAL EFC2/T28.2.28. PARK ROYAL AMMETER. V4670 We have had on test since June last an ammeter type MC.2.F. made by the Park Royal Company. A report JC.90 of one of… | ||
| Scan214 | Switch to a British supplier for instruments to avoid reliance on U.S.A. sources. | ||
| View original record | -2- Contd. EY. has asked me to put these facts before you for your consent to going ahead in obtaining instruments from this source made up suitably to our standard finish, RJ. being anxious to be… | ||
| Scan215 | Progress report on the 10,000 miles test of the 15-EX car in France, detailing steering and frame distortion investigations. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. DA ✓✓ [Stamped] ORIGINAL Hs2/LG28.2.28. X8940B [handwritten] X7430 [handwritten] 15-EX CAR - 10,000 MILES TEST IN FRANCE. We attach herewith a… | ||
| Scan216 | Test report on the 15-EX car after 10,000 miles, covering general condition, suspension, and bodywork. | ||
| View original record | C O P Y. Hs/Rm 26.2.28. Chateauroux, Indre, France. 15-EX - 10,000 MILES TEST CAR. Car generally. The car generally is in splendid condition; the engine is in good tune and very smooth over its whole… | ||
| Scan217 | Issues with a car's bodywork, specifically a developing crack and rattles from the dash. | ||
| View original record | contd :- -2- G.W.H. to report fully on the deck fittings etc., door locks and hinges seem quite O.K. As you know the front of the body is now being held down on rubber as the springs were no good.… | ||