| Description | Date | Identifier | |
| Letter to Major Carter at the Royal Aircraft Establishment regarding crankshaft stiffness, torsional vibrations, and V-8 engines. | 19th Oct 1929 | Box 63 \ 4 scan0092 | |
| Dimensioned drawing showing a side and end view of a crankshaft component. | 10th Oct 1924 | Box 63 \ 4 scan0093 | |
| Letter from the Royal Aircraft Establishment discussing crankshaft stiffness and eight-cylinder engine design. | 30th Oct 1929 | Box 63 \ 4 scan0094 | |
| List of obsolete 8-cylinder Vee aircraft engines and a discussion on gear ratio modifications and subsequent failures. | 30th Oct 1929 | Box 63 \ 4 scan0095 | |
| Concluding page of a letter discussing the influence of gear ratio on the airscrew. | 16th Dec 1929 | Box 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 1929 | Box 63 \ 4 scan0097 | |
| Investigation of dominant flywheel vibrations in 20 HP experimental cars. | 20th Dec 1923 | Box 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 1929 | Box 63 \ 4 scan0099 | |
| Observations on flywheel vibration in various car models and modifications to a test rig for further investigation. | 21th Dec 1929 | Box 63 \ 4 scan0100 | |
| Fatigue tests on various model crankshafts for the 'F' engine. | 20th Dec 1929 | Box 63 \ 4 scan0101 | |
| Testing of new bearing metals with higher tensile strength for a 20 HP engine. | 20th Dec 1929 | Box 63 \ 4 scan0102 | |
| Test and examination report on a Phantom II low inertia slipper wheel crankshaft damper. | 3rd Jan 1930 | Box 63 \ 4 scan0103 | |
| Design and operation of the Phantom II Low Inertia Crankshaft Damper for K.2B series and onwards. | 3rd Jan 1930 | Box 63 \ 4 scan0104 | |
| Instructions for dismantling, erecting, and testing slipper wheels and driving springs. | 15th Jan 1930 | Box 63 \ 4 scan0105 | |
| Fatigue tests on model test crankshafts made from air hardening steel. | 15th Jan 1930 | Box 63 \ 4 scan0106 | |
| Receiving super VNCA Crankshaft Steel from Vickers Limited to produce model crankshafts. | 15th Jan 1930 | Box 63 \ 4 scan0107 | |
| Blueprint showing the results of a model crankshaft fracture test. | 28th Jan 1930 | Box 63 \ 4 scan0108 | |
| Responding to a report on the Phantom II Low Inertia Slipper Drive, addressing various identified issues. | 4th Jan 1930 | Box 63 \ 4 scan0109 | |
| Cleaning lapping paste from spring drives and plates as a precautionary measure. | 31th Jan 1930 | Box 63 \ 4 scan0110 | |
| Results of torsion and fatigue tests on model cranks and shafts. | 31th Jan 1930 | Box 63 \ 4 scan0111 | |
| The comparative rig testing of standard and narrow web model crankshafts until fracture. | 13th Mar 1930 | Box 63 \ 4 scan0112 | |
| Blueprint detailing model crank tests with diagrams and results. | 28th Jan 1930 | Box 63 \ 4 scan0113 | |
| Blueprint of a crankshaft with flywheel, detailing test results and inertia modifications. | 13th Mar 1930 | Box 63 \ 4 scan0114 | |
| Test report on a Falcon III engine with a stiffened crankshaft and fitted flywheel to investigate torsional vibration. | 6th May 1930 | Box 63 \ 4 scan0115 | |
| Note on engine vibration intensity observed outside the normal cruising range. | 6th May 1930 | Box 63 \ 4 scan0116 | |
| Model crank tests detailing inconsistent results and modifications to the testing procedure to induce failure. | 19th May 1930 | Box 63 \ 4 scan0117 | |
| Test results for crank models DES.989 and E.32053, detailing performance metrics. | 19th May 1930 | Box 63 \ 4 scan0118 | |
| Listing different types of model cranks being manufactured and urging for their prompt delivery. | 4th Jun 1930 | Box 63 \ 4 scan0119 | |
| Summarizing the results of comparative tests on model cranks made from different materials. | 14th Aug 1930 | Box 63 \ 4 scan0120 | |
| Test results for model crankshafts of different materials. | 19th May 1930 | Box 63 \ 4 scan0121 | |
| Test results for different crank materials, detailing run time, reversals, and flywheel RPM. | 18th Aug 1930 | Box 63 \ 4 scan0122 | |
| Test results for model crankshafts made from Nitro Alloy steel. | 18th Aug 1930 | Box 63 \ 4 scan0123 | |
| Request for making and testing model cranks from different steel specifications. | 27th Aug 1930 | Box 63 \ 4 scan0124 | |
| Comparing the performance of nitralloy and C.H.N.S. materials for 'F' type engine crankshafts. | 27th Aug 1930 | Box 63 \ 4 scan0125 | |
| Request for the creation and testing of model cranks made from various specified materials. | 27th Aug 1930 | Box 63 \ 4 scan0126 | |
| Torsional and jogging test results for two modified Falcon model crankshafts with different web thicknesses. | 27th Aug 1930 | Box 63 \ 4 scan0127 | |
| Torsional test results and diagrams for a Falcon model crankshaft. | 25th Sep 1930 | Box 63 \ 4 scan0128 | |
| Micro-examination report detailing hardness and other tests performed on RE Model Crankshafts. | 25th Sep 1930 | Box 63 \ 4 scan0129 | |
| Metallurgical analysis report detailing hardness, fracture appearance, and chemical composition of various steel shafts. | 25th Sep 1930 | Box 63 \ 4 scan0130 | |
| Analysis of slag content and microstructure in various steel shafts and crankshafts. | 25th Sep 1930 | Box 63 \ 4 scan0131 | |
| Mechanical test results for Nitralloy steel and Nickel case hardening steels to specifications 2072 and 2073. | 25th Sep 1930 | Box 63 \ 4 scan0132 | |
| Results of Izod and hardness tests on various case hardening steels. | 3rd Oct 1930 | Box 63 \ 4 scan0133 | |
| Discrepancies in the material specifications and test results for model crankshafts. | 3rd Oct 1930 | Box 63 \ 4 scan0134 | |
| Correcting a specification number for model crankshafts in a previous report. | 4th Oct 1930 | Box 63 \ 4 scan0135 | |
| Laboratory report comparing Izod test results for different steels used in model crankshafts. | 10th Oct 1930 | Box 63 \ 4 scan0136 | |
| Notification regarding the delivery of model crankshafts made from special steel for the Experimental Department. | 29th Jan 1931 | Box 63 \ 4 scan0137 | |
| Specifying the nitriding temperature and duration for experimental miniature crankshafts. | 5th Feb 1931 | Box 63 \ 4 scan0138 | |
| Results of crank tests for DES.995 models, including test conditions and a resume of previous tests. | 4th Apr 1932 | Box 63 \ 4 scan0139 | |
| Drawing of a Torsional Vibration Indicator. | 4th Apr 1932 | Box 63 \ 4 scan0140 | |
| Diagrams comparing bearing and balance weight arrangements for a 12-cylinder engine. | 4th Apr 1932 | Box 63 \ 4 scan0141 | |
| Drawing illustrating the setup for measuring torque and deflection on a crankshaft. | 25th Aug 1913 | Box 63 \ 4 scan0142 | |
| Cross-section drawing of a gearbox assembly, showing shafts, bearings, and casing. | 25th Aug 1913 | Box 63 \ 4 scan0143 | |
| Comparison of deflection and running particulars for two 'Condor Eccentric Web Type Model Cranks'. | 25th Aug 1913 | Box 63 \ 4 scan0144 | |
| Graphical analysis and data sheet detailing crankshaft deflection and failure tests for a Condor model engine. | 25th Aug 1913 | Box 63 \ 4 scan0145 | |
| Graphical analysis and particulars of running for 'Condor' Model Cranks. | 25th Aug 1913 | Box 63 \ 4 scan0146 | |
| New vacuum tank design suitable for the new dashboard. | 8th Jan 1926 | Box 64 \ 1 scan0001 | |
| Carburetter starvation caused by petrol boiling in the Autovac on a Phantom chassis. | 14th Jun 1927 | Box 64 \ 1 scan0002 | |
| Tests concerning petrol starvation due to exhaust manifold heat, listing five possible solutions. | 21th Jan 1928 | Box 64 \ 1 scan0003 | |
| Positioning of the Autovac system in relation to the exhaust. | 21th Jan 1928 | Box 64 \ 1 scan0004 | |
| Tests of the petrol suction pump on the 'SS' engine when coupled to a standard autovac. | 3rd Sep 1928 | Box 64 \ 1 scan0005 | |
| Analysis of pump operation, piston stroke, and port arrangement in relation to suction pressure and autovac delivery. | 3rd Sep 1928 | Box 64 \ 1 scan0006 | |
| Pump efficiency, suction readings, and lubrication improvements for the ignition governor and dynamo drive bush. | 4th Sep 1928 | Box 64 \ 1 scan0007 | |
| Schematic diagram showing the operation of an S.S. Vacuum Pump. | 4th Sep 1928 | Box 64 \ 1 scan0008 | |
| Performance graph for a Vacuum Pump on a Super Sports Engine, plotting petrol delivery and suction against engine RPM. | 1st Sep 1928 | Box 64 \ 1 scan0009 | |
| Wire confirmation detailing modifications to a vacuum pump piston and cylinder for retesting. | 5th Sep 1928 | Box 64 \ 1 scan0010 | |
| Modifications to the petrol vacuum pump, tappet rocker shaft lubrication, and valve timing for the 'SS' engine. | 1st Sep 1928 | Box 64 \ 1 scan0011 | |
| Long duration timing and oil consumption tests being conducted on the Phantom engine. | 19th Feb 1921 | Box 64 \ 1 scan0012 | |
| Blueprint detailing modifications to a vacuum pump for a Super Sports Engine. | 19th Feb 1921 | Box 64 \ 1 scan0013 | |
| Performance curve graph for a modified vacuum pump on a Super Sports Engine. | 7th Sep 1928 | Box 64 \ 1 scan0014 | |
| New dashboard arrangement to maximize the height of the autovac tank. | 11th Nov 1928 | Box 64 \ 1 scan0015 | |
| Successful temporary modifications to the 'SS' vacuum pump. | 12th Nov 1928 | Box 64 \ 1 scan0016 | |
| Blueprint detailing modifications to a vacuum pump for a Super Sports Engine. | 12th Nov 1928 | Box 64 \ 1 scan0017 | |
| Request for a new connecting rod and eccentric for the 'SS' vacuum pump drive test engine. | 22th Nov 1928 | Box 64 \ 1 scan0018 | |
| The seizure of a vacuum pump's cam wheel eccentric due to thermal expansion and insufficient clearance. | 23th Nov 1928 | Box 64 \ 1 scan0019 | |
| Suggesting increased clearance between the eccentric and connecting rod following tightness issues on an SS engine. | 26th Nov 1928 | Box 64 \ 1 scan0020 | |
| Modification to the clearance for the 'SS' vacuum pump cam wheel eccentric. | 26th Nov 1928 | Box 64 \ 1 scan0021 | |
| Performance issues with the 'SS' vacuum pump and a recommendation for its improvement. | 1st Jan 1929 | Box 64 \ 1 scan0022 | |
| Construction of a silencer for a noisy vacuum pump and recommending its application to SS engines. | 23th Jan 1929 | Box 64 \ 1 scan0023 | |
| Arrangement of a vacuum pump silencer for a super sports engine. | 21th Dec 1938 | Box 64 \ 1 scan0024 | |
| Simplification of the petrol supply and reserve system. | 30th Jan 1929 | Box 64 \ 1 scan0025 | |
| Lubrication and design points for a dynamo drive and an air pump. | 23th Jan 1929 | Box 64 \ 1 scan0026 | |
| Test report on the 'SS' Vacuum Pump's performance with low fuel levels in a car in France. | 31th Jan 1929 | Box 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 1929 | Box 64 \ 1 scan0028 | |
| Modifying the Autovac petrol feed tap on Phantom & 'SS' models to prevent petrol starvation by enlarging the tap holes. | 1st Feb 1929 | Box 64 \ 1 scan0029 | |
| Note on the importance of correct hole drilling in tap manufacturing for autovac and carburetter systems. | 13th Feb 1929 | Box 64 \ 1 scan0030 | |
| Standardisation sheet for water heating for S/C carburetters and a note regarding a delayed vent pipe. | 13th Feb 1929 | Box 64 \ 1 scan0031 | |
| Proposals for a reserve petrol device in an Autovac tank, including Mr. Royce's needle valve suggestion. | 14th Feb 1929 | Box 64 \ 1 scan0032 | |
| Modification for a two-level device, likely a fuel tap, with a diagram of its operation. | 1st Feb 1929 | Box 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 1929 | Box 64 \ 1 scan0034 | |
| Recommendation to increase vacuum pump piping diameter to 5/16 inch to improve fuel supply efficiency. | 20th Mar 1929 | Box 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 1929 | Box 64 \ 1 scan0036 | |
| Objection to a standard sheet for a vent pipe from the petrol filter to the Autovac tank. | 12th Apr 1929 | Box 64 \ 1 scan0037 | |
| Proposal to use studs instead of screws for the SS air pump assembly to ease installation. | 12th Apr 1929 | Box 64 \ 1 scan0038 | |
| Modifications to improve the efficiency of the S.S. Vacuum Pump. | 22th May 1929 | Box 64 \ 1 scan0039 | |
| Modifications to the SS. Vacuum Pump to increase efficiency. | 4th Jun 1929 | Box 64 \ 1 scan0040 | |
| Blueprint detailing modifications to a vacuum pump cylinder for an S.S. Engine. | 27th Feb 1922 | Box 64 \ 1 scan0041 | |
| Blueprint of a modification to a vacuum pump piston for an S.S. Engine. | 27th Feb 1922 | Box 64 \ 1 scan0042 | |
| Drawing detailing a modification to a vacuum pump cylinder for an S.S. engine. | 28th Jun 1938 | Box 64 \ 1 scan0043 | |
| Modification drawing for a vacuum pump piston for an S.S. engine. | 28th Jun 1938 | Box 64 \ 1 scan0044 | |
| Required alteration to the stand pipe in S.S. Autovac Tanks. | 8th Jul 1929 | Box 64 \ 1 scan0045 | |
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