Rolls-Royce Archives
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
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Letter to Major Carter at the Royal Aircraft Establishment regarding crankshaft stiffness, torsional vibrations, and V-8 engines.19th Oct 1929Box 63 \ 4  scan0092
Dimensioned drawing showing a side and end view of a crankshaft component.10th Oct 1924Box 63 \ 4  scan0093
Letter from the Royal Aircraft Establishment discussing crankshaft stiffness and eight-cylinder engine design.30th Oct 1929Box 63 \ 4  scan0094
List of obsolete 8-cylinder Vee aircraft engines and a discussion on gear ratio modifications and subsequent failures.30th Oct 1929Box 63 \ 4  scan0095
Concluding page of a letter discussing the influence of gear ratio on the airscrew.16th Dec 1929Box 63 \ 4  scan0096
Recommendation to replace cast iron flywheels with steel ones on single-cylinder units due to stress concerns at high RPM.16th Dec 1929Box 63 \ 4  scan0097
Investigation of dominant flywheel vibrations in 20 HP experimental cars.20th Dec 1923Box 63 \ 4  scan0098
Flywheel vibration observations, measurements at different RPMs, and analysis of its behaviour on a test bed versus in a car.18th Feb 1929Box 63 \ 4  scan0099
Observations on flywheel vibration in various car models and modifications to a test rig for further investigation.21th Dec 1929Box 63 \ 4  scan0100
Fatigue tests on various model crankshafts for the 'F' engine.20th Dec 1929Box 63 \ 4  scan0101
Testing of new bearing metals with higher tensile strength for a 20 HP engine.20th Dec 1929Box 63 \ 4  scan0102
Test and examination report on a Phantom II low inertia slipper wheel crankshaft damper.3rd Jan 1930Box 63 \ 4  scan0103
Design and operation of the Phantom II Low Inertia Crankshaft Damper for K.2B series and onwards.3rd Jan 1930Box 63 \ 4  scan0104
Instructions for dismantling, erecting, and testing slipper wheels and driving springs.15th Jan 1930Box 63 \ 4  scan0105
Fatigue tests on model test crankshafts made from air hardening steel.15th Jan 1930Box 63 \ 4  scan0106
Receiving super VNCA Crankshaft Steel from Vickers Limited to produce model crankshafts.15th Jan 1930Box 63 \ 4  scan0107
Blueprint showing the results of a model crankshaft fracture test.28th Jan 1930Box 63 \ 4  scan0108
Responding to a report on the Phantom II Low Inertia Slipper Drive, addressing various identified issues.4th Jan 1930Box 63 \ 4  scan0109
Cleaning lapping paste from spring drives and plates as a precautionary measure.31th Jan 1930Box 63 \ 4  scan0110
Results of torsion and fatigue tests on model cranks and shafts.31th Jan 1930Box 63 \ 4  scan0111
The comparative rig testing of standard and narrow web model crankshafts until fracture.13th Mar 1930Box 63 \ 4  scan0112
Blueprint detailing model crank tests with diagrams and results.28th Jan 1930Box 63 \ 4  scan0113
Blueprint of a crankshaft with flywheel, detailing test results and inertia modifications.13th Mar 1930Box 63 \ 4  scan0114
Test report on a Falcon III engine with a stiffened crankshaft and fitted flywheel to investigate torsional vibration.6th May 1930Box 63 \ 4  scan0115
Note on engine vibration intensity observed outside the normal cruising range.6th May 1930Box 63 \ 4  scan0116
Model crank tests detailing inconsistent results and modifications to the testing procedure to induce failure.19th May 1930Box 63 \ 4  scan0117
Test results for crank models DES.989 and E.32053, detailing performance metrics.19th May 1930Box 63 \ 4  scan0118
Listing different types of model cranks being manufactured and urging for their prompt delivery.4th Jun 1930Box 63 \ 4  scan0119
Summarizing the results of comparative tests on model cranks made from different materials.14th Aug 1930Box 63 \ 4  scan0120
Test results for model crankshafts of different materials.19th May 1930Box 63 \ 4  scan0121
Test results for different crank materials, detailing run time, reversals, and flywheel RPM.18th Aug 1930Box 63 \ 4  scan0122
Test results for model crankshafts made from Nitro Alloy steel.18th Aug 1930Box 63 \ 4  scan0123
Request for making and testing model cranks from different steel specifications.27th Aug 1930Box 63 \ 4  scan0124
Comparing the performance of nitralloy and C.H.N.S. materials for 'F' type engine crankshafts.27th Aug 1930Box 63 \ 4  scan0125
Request for the creation and testing of model cranks made from various specified materials.27th Aug 1930Box 63 \ 4  scan0126
Torsional and jogging test results for two modified Falcon model crankshafts with different web thicknesses.27th Aug 1930Box 63 \ 4  scan0127
Torsional test results and diagrams for a Falcon model crankshaft.25th Sep 1930Box 63 \ 4  scan0128
Micro-examination report detailing hardness and other tests performed on RE Model Crankshafts.25th Sep 1930Box 63 \ 4  scan0129
Metallurgical analysis report detailing hardness, fracture appearance, and chemical composition of various steel shafts.25th Sep 1930Box 63 \ 4  scan0130
Analysis of slag content and microstructure in various steel shafts and crankshafts.25th Sep 1930Box 63 \ 4  scan0131
Mechanical test results for Nitralloy steel and Nickel case hardening steels to specifications 2072 and 2073.25th Sep 1930Box 63 \ 4  scan0132
Results of Izod and hardness tests on various case hardening steels.3rd Oct 1930Box 63 \ 4  scan0133
Discrepancies in the material specifications and test results for model crankshafts.3rd Oct 1930Box 63 \ 4  scan0134
Correcting a specification number for model crankshafts in a previous report.4th Oct 1930Box 63 \ 4  scan0135
Laboratory report comparing Izod test results for different steels used in model crankshafts.10th Oct 1930Box 63 \ 4  scan0136
Notification regarding the delivery of model crankshafts made from special steel for the Experimental Department.29th Jan 1931Box 63 \ 4  scan0137
Specifying the nitriding temperature and duration for experimental miniature crankshafts.5th Feb 1931Box 63 \ 4  scan0138
Results of crank tests for DES.995 models, including test conditions and a resume of previous tests.4th Apr 1932Box 63 \ 4  scan0139
Drawing of a Torsional Vibration Indicator.4th Apr 1932Box 63 \ 4  scan0140
Diagrams comparing bearing and balance weight arrangements for a 12-cylinder engine.4th Apr 1932Box 63 \ 4  scan0141
Drawing illustrating the setup for measuring torque and deflection on a crankshaft.25th Aug 1913Box 63 \ 4  scan0142
Cross-section drawing of a gearbox assembly, showing shafts, bearings, and casing.25th Aug 1913Box 63 \ 4  scan0143
Comparison of deflection and running particulars for two 'Condor Eccentric Web Type Model Cranks'.25th Aug 1913Box 63 \ 4  scan0144
Graphical analysis and data sheet detailing crankshaft deflection and failure tests for a Condor model engine.25th Aug 1913Box 63 \ 4  scan0145
Graphical analysis and particulars of running for 'Condor' Model Cranks.25th Aug 1913Box 63 \ 4  scan0146
New vacuum tank design suitable for the new dashboard.8th Jan 1926Box 64 \ 1  scan0001
Carburetter starvation caused by petrol boiling in the Autovac on a Phantom chassis.14th Jun 1927Box 64 \ 1  scan0002
Tests concerning petrol starvation due to exhaust manifold heat, listing five possible solutions.21th Jan 1928Box 64 \ 1  scan0003
Positioning of the Autovac system in relation to the exhaust.21th Jan 1928Box 64 \ 1  scan0004
Tests of the petrol suction pump on the 'SS' engine when coupled to a standard autovac.3rd Sep 1928Box 64 \ 1  scan0005
Analysis of pump operation, piston stroke, and port arrangement in relation to suction pressure and autovac delivery.3rd Sep 1928Box 64 \ 1  scan0006
Pump efficiency, suction readings, and lubrication improvements for the ignition governor and dynamo drive bush.4th Sep 1928Box 64 \ 1  scan0007
Schematic diagram showing the operation of an S.S. Vacuum Pump.4th Sep 1928Box 64 \ 1  scan0008
Performance graph for a Vacuum Pump on a Super Sports Engine, plotting petrol delivery and suction against engine RPM.1st Sep 1928Box 64 \ 1  scan0009
Wire confirmation detailing modifications to a vacuum pump piston and cylinder for retesting.5th Sep 1928Box 64 \ 1  scan0010
Modifications to the petrol vacuum pump, tappet rocker shaft lubrication, and valve timing for the 'SS' engine.1st Sep 1928Box 64 \ 1  scan0011
Long duration timing and oil consumption tests being conducted on the Phantom engine.19th Feb 1921Box 64 \ 1  scan0012
Blueprint detailing modifications to a vacuum pump for a Super Sports Engine.19th Feb 1921Box 64 \ 1  scan0013
Performance curve graph for a modified vacuum pump on a Super Sports Engine.7th Sep 1928Box 64 \ 1  scan0014
New dashboard arrangement to maximize the height of the autovac tank.11th Nov 1928Box 64 \ 1  scan0015
Successful temporary modifications to the 'SS' vacuum pump.12th Nov 1928Box 64 \ 1  scan0016
Blueprint detailing modifications to a vacuum pump for a Super Sports Engine.12th Nov 1928Box 64 \ 1  scan0017
Request for a new connecting rod and eccentric for the 'SS' vacuum pump drive test engine.22th Nov 1928Box 64 \ 1  scan0018
The seizure of a vacuum pump's cam wheel eccentric due to thermal expansion and insufficient clearance.23th Nov 1928Box 64 \ 1  scan0019
Suggesting increased clearance between the eccentric and connecting rod following tightness issues on an SS engine.26th Nov 1928Box 64 \ 1  scan0020
Modification to the clearance for the 'SS' vacuum pump cam wheel eccentric.26th Nov 1928Box 64 \ 1  scan0021
Performance issues with the 'SS' vacuum pump and a recommendation for its improvement.1st Jan 1929Box 64 \ 1  scan0022
Construction of a silencer for a noisy vacuum pump and recommending its application to SS engines.23th Jan 1929Box 64 \ 1  scan0023
Arrangement of a vacuum pump silencer for a super sports engine.21th Dec 1938Box 64 \ 1  scan0024
Simplification of the petrol supply and reserve system.30th Jan 1929Box 64 \ 1  scan0025
Lubrication and design points for a dynamo drive and an air pump.23th Jan 1929Box 64 \ 1  scan0026
Test report on the 'SS' Vacuum Pump's performance with low fuel levels in a car in France.31th Jan 1929Box 64 \ 1  scan0027
Proposal for a new vacuum pump oil pipe connection, with an attached blueprint, to solve a twisting problem with the current tee joint.1st Feb 1929Box 64 \ 1  scan0028
Modifying the Autovac petrol feed tap on Phantom & 'SS' models to prevent petrol starvation by enlarging the tap holes.1st Feb 1929Box 64 \ 1  scan0029
Note on the importance of correct hole drilling in tap manufacturing for autovac and carburetter systems.13th Feb 1929Box 64 \ 1  scan0030
Standardisation sheet for water heating for S/C carburetters and a note regarding a delayed vent pipe.13th Feb 1929Box 64 \ 1  scan0031
Proposals for a reserve petrol device in an Autovac tank, including Mr. Royce's needle valve suggestion.14th Feb 1929Box 64 \ 1  scan0032
Modification for a two-level device, likely a fuel tap, with a diagram of its operation.1st Feb 1929Box 64 \ 1  scan0033
Recommending a change to the lubrication scheme for the S.S. vacuum pump and dynamo pinion bush due to excessive oil issues.9th Mar 1929Box 64 \ 1  scan0034
Recommendation to increase vacuum pump piping diameter to 5/16 inch to improve fuel supply efficiency.20th Mar 1929Box 64 \ 1  scan0035
Chasing the signed copy of the standardisation sheet for a vent pipe from the petrol filter to the Autovac tank.5th Apr 1929Box 64 \ 1  scan0036
Objection to a standard sheet for a vent pipe from the petrol filter to the Autovac tank.12th Apr 1929Box 64 \ 1  scan0037
Proposal to use studs instead of screws for the SS air pump assembly to ease installation.12th Apr 1929Box 64 \ 1  scan0038
Modifications to improve the efficiency of the S.S. Vacuum Pump.22th May 1929Box 64 \ 1  scan0039
Modifications to the SS. Vacuum Pump to increase efficiency.4th Jun 1929Box 64 \ 1  scan0040
Blueprint detailing modifications to a vacuum pump cylinder for an S.S. Engine.27th Feb 1922Box 64 \ 1  scan0041
Blueprint of a modification to a vacuum pump piston for an S.S. Engine.27th Feb 1922Box 64 \ 1  scan0042
Drawing detailing a modification to a vacuum pump cylinder for an S.S. engine.28th Jun 1938Box 64 \ 1  scan0043
Modification drawing for a vacuum pump piston for an S.S. engine.28th Jun 1938Box 64 \ 1  scan0044
Required alteration to the stand pipe in S.S. Autovac Tanks.8th Jul 1929Box 64 \ 1  scan0045


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