| Description | Date | Identifier | |
| Crankshaft oiling schemes for the Phantom and 'SS' models, advising against immediate changes. | 8th Jan 1931 | Box 13 \ 8 08-page4 | |
| Advantages and disadvantages of long versus short connecting rods in car engines. | 8th Jan 1931 | Box 13 \ 8 08-page5 | |
| Confirming views on main bearing and con rod lubrication for aero and car engines. | 10th Feb 1933 | Box 13 \ 8 08-page6 | |
| Recommendations on connecting rods and crankshaft lubrication for the 'SS' engine. | 11th Nov 1928 | Box 13 \ 8 08-page7 | |
| Calculations on engine component ratios and their effect on forces and flywheel inertia. | 19th Apr 1934 | Box 13 \ 8 08-page8 | |
| Blueprint for a modified oil pipe on Phantom connecting rods due to recent failures. | 19th Apr 1934 | Box 13 \ 8 08-page9 | |
| Revisions to the crankshaft and connecting rods for EAC.10 & 14 models. | 25th Nov 1927 | Box 13 \ 9 9-page1 | |
| Proposing a spring-loaded adjustment on the front axle control ball joint. | 21th Jun 1928 | Box 13 \ 9 9-page2 | |
| Modifications for the 'SS' Chassis connecting rods and crankshaft. | 9th Nov 1928 | Box 13 \ 9 9-page3 | |
| Crankshaft oiling schemes for the Phantom and 'SS' models, advising against changes until further investigation. | 18th Jan 1931 | Box 13 \ 9 9-page4 | |
| Ratio of connecting rod length to stroke for 25HP & 45HP car engines. | 18th Jan 1931 | Box 13 \ 9 9-page5 | |
| Confirming views on lubricating grooves for main bearings and connecting rods in aero and car engines. | 10th Feb 1933 | Box 13 \ 9 9-page6 | |
| Recommending connecting rod types and discussing crankshaft lubrication for the 'SS' engine. | 9th Nov 1928 | Box 13 \ 9 9-page7 | |
| Effects of changing the rod length to crank radius ratio on engine forces and flywheel inertia. | 19th Apr 1934 | Box 13 \ 9 9-page8 | |
| Modification to the oil pipe on Phantom connecting rods, referencing blueprint LeC.3878. | 19th Apr 1934 | Box 13 \ 9 9-page9 | |
| Comparative weight analysis of Duralumin and Steel Rocker Pedestals for the Phantom Rocker Mechanism. | 22th Jun 1926 | Box 14 \ 1 Scan001 | |
| Approval and development of a sequence starter for the Phantom engine. | 17th Sep 1927 | Box 14 \ 1 Scan002 | |
| Sending new drawings for a gearbox and clutch casing, detailing modifications and differences. | 25th Nov 1927 | Box 14 \ 1 Scan003 | |
| Sending original drawings for the EAC.10 crankcase and correcting a previous dispatch. | 1st Jan 1928 | Box 14 \ 1 Scan004 | |
| Modifications to the 'SS' valve gear lubrication system. | 13th Nov 1928 | Box 14 \ 1 Scan005 | |
| Alterations to the 'SS' crankshaft rear oil retainer to improve efficiency and prevent leaks. | 7th Jan 1929 | Box 14 \ 1 Scan006 | |
| Investigation into oil pressure loss in the 'SS' lower half crankchamber during heavy braking and the proposed solution. | 24th Jan 1929 | Box 14 \ 1 Scan007 | |
| Oil pressure loss after braking and potential solutions for managing oil surge in the crankcase. | 2nd Feb 1929 | Box 14 \ 1 Scan008 | |
| Report comparing oil suction systems on the SS, Phantom, and India chassis, and proposing design improvements. | 2nd Feb 1929 | Box 14 \ 1 Scan009 | |
| Requesting figures for 'SS' model oil pressures when starting from cold. | 2nd Feb 1929 | Box 14 \ 1 Scan010 | |
| The maximum oil pressures for the 'SS' engine when starting from cold. | 19th Feb 1929 | Box 14 \ 1 Scan011 | |
| Recommendation to modify the 'SS' bottom half and oil filter, specifying new hole dimensions and orientation. | 6th Mar 1929 | Box 14 \ 1 Scan012 | |
| The test performance of Invar pistons for the Phantom II engine. | 13th Nov 1929 | Box 14 \ 1 Scan013 | |
| Oil leakage from the Phantom II Crankcase due to inadequate clearances and drain holes. | 23th Jan 1930 | Box 14 \ 1 Scan014 | |
| Query regarding the clearance of the crankcase breather pipe with the extra oil cock control rod on an L.H. P.2 chassis. | 24th May 1930 | Box 14 \ 1 Scan015 | |
| Trials and suggestions for fixing oil leaks from the rear crankcase of a Phantom model. | 28th May 1930 | Box 14 \ 1 Scan016 | |
| Design of the L.H. P.2 Sump Drain Plug, comparing a direct screw design with a newer version using an insert. | 21th Aug 1930 | Box 14 \ 1 Scan017 | |
| Practice and implications of screwing drain plugs directly into an aluminium base. | 1st Aug 1930 | Box 14 \ 1 Scan018 | |
| Improvements to 25HP and 45HP engines, focusing on crankshaft balancing and crankchamber stiffness. | 20th Dec 1930 | Box 14 \ 1 Scan019 | |
| Proposed improvements for the 25HP and 45HP engines, focusing on crankshafts, suspension, and clutch design. | 26th Jan 1931 | Box 14 \ 1 Scan020 | |
| Proposal to increase the diameter of the crankcase oil filler, specifically for the 28 HP chassis. | 26th Jan 1931 | Box 14 \ 1 Scan021 | |
| Redesigning the crankcase oil filler to have a larger orifice for direct pouring from a can. | 28th Jan 1931 | Box 14 \ 1 Scan022 | |
| Progress report on a scheme to convert approximately 300 crankcases to a new 'diamond mounting' system. | 5th Feb 1931 | Box 14 \ 1 Scan023 | |
| Crankcase cracking in two test bed engines and proposed modifications to increase stiffness and bearing life. | 31th Aug 1931 | Box 14 \ 1 Scan024 | |
| Photograph documenting multiple cracks in an engine crankcase, highlighted for inspection. | 28th Sep 1931 | Box 14 \ 1 Scan025 | |
| Conclusions on engine balance weights, flywheel vibrations, and bearing loads. | 28th Sep 1931 | Box 14 \ 1 Scan027 | |
| Improvements to the central bearing of the Phantom crankcase due to a crack in an 8-litre engine. | 5th May 1933 | Box 14 \ 1 Scan028 | |
| Instruction sheet detailing the replacement of an oil filler on a Phantom II chassis with a larger version. | 9th Aug 1933 | Box 14 \ 1 Scan029 | |
| New drawings and parts for the 40/50 HP Chassis Oil Filler. | 5th Oct 1933 | Box 14 \ 1 Scan030 | |
| Standardisation of chassis parts, fitting a larger oil filler to the crankcase. | 14th Jul 1933 | Box 14 \ 1 Scan031 | |
| Implementation and costs associated with a new standardized chassis part. | 14th Jul 1933 | Box 14 \ 1 Scan032 | |
| Diagnosing vibration issues on experimental car 12-EX and proposing solutions. | 1st Oct 1926 | Box 14 \ 2 Scan001 | |
| Standardisation of steel shells for main crankshaft bearings. | 22th Sep 1926 | Box 14 \ 2 Scan002 | |
| Revisions to the crankshaft and connecting rods for EAC.10 and 14 models. | 25th Nov 1927 | Box 14 \ 2 Scan003 | |
| Correspondence sending detail drawings for Duralumin main bearing caps for the standard Phantom engine. | 13th Dec 1927 | Box 14 \ 2 Scan004 | |
| The sending of two models of Duralumin main bearing caps for the Phantom engine. | 17th Dec 1927 | Box 14 \ 2 Scan005 | |
| Materials and experiments for car engine crankshaft dampers. | 1st Feb 1928 | Box 14 \ 2 Scan006 | |
| Approval of a design for crankshaft oiling, with an instruction not to alter the rear end of the car. | 2nd Feb 1928 | Box 14 \ 2 Scan007 | |
| Crankshaft and bearing lubrication for the Japan III model, detailing issues with oil supply and the proposed remedy. | 19th Apr 1928 | Box 14 \ 2 Scan008 | |
| Testing a crankshaft oiling system using grooveless bearings. | 19th Apr 1928 | Box 14 \ 2 Scan009 | |
| Recommendations for oil supply and pressure for crankshafts using grooveless bearings. | 8th May 1928 | Box 14 \ 2 Scan010 | |
| Request to modify two flywheels to test a 12-EX crankshaft without its slipper wheel. | 8th May 1928 | Box 14 \ 2 Scan011 | |
| Modification to the oil tubes in F. & H. engine and chassis crankshafts. | 11th Jul 1928 | Box 14 \ 2 Scan012 | |
| Difficulties experienced with new crankshaft dampers on 20 HP and 40/50 HP cars. | 19th Jul 1928 | Box 14 \ 2 Scan013 | |
| The engineering challenges and potential solutions for engine damping, spring systems, and timing. | 19th Jul 1928 | Box 14 \ 2 Scan014 | |
| Slipper wheel drives and the future requirement for reduced inertia dampers at higher engine speeds. | 19th Jul 1928 | Box 14 \ 2 Scan015 | |
| Internal request to order 6 cork washers to a specific model and thickness. | 19th Jul 1928 | Box 14 \ 2 Scan016 | |
| Query regarding the delay in developing a longer duration cam for the 'SS' engine. | 20th Oct 1928 | Box 14 \ 2 Scan017 | |
| Directive outlining modifications for the S.S. Chassis, specifically for the connecting rod and crankshaft. | 9th Nov 1928 | Box 14 \ 2 Scan018 | |
| Providing recommendations on connecting rods and crankshaft lubrication for the 'SS' engine. | 9th Nov 1928 | Box 14 \ 2 Scan019 | |
| The crankshaft oiling scheme, comparing the current Phantom system with a new one for the 'SS' model. | 12th Nov 1928 | Box 14 \ 2 Scan020 | |
| Requesting a scheme to employ a Phantom crankshaft damper and spring drive on the 'SS' crankshaft. | 12th Nov 1928 | Box 14 \ 2 Scan021 | |
| Decision to adopt the Phantom crankshaft lubrication system for the 'SS' engine. | 14th Nov 1928 | Box 14 \ 2 Scan022 | |
| Test on an experimental 'SS' crankshaft and its balance weights. | 24th Nov 1928 | Box 14 \ 2 Scan023 | |
| Issues with the 20 HP car, including vibration and poor performance, recommending a delay in its production. | 2nd Jan 1929 | Box 14 \ 2 Scan024 | |
| Recommendation to continue production of the 20 HP car with modifications while the 'SS' model is completed. | 5th Jan 1929 | Box 14 \ 2 Scan025 | |
| High oil consumption due to a crankshaft leak and a proposed reversion to a previous design. | 5th Jan 1929 | Box 14 \ 2 Scan026 | |
| Proposed alteration to the 'SS' crankshaft rear oil retainer to improve efficiency. | 1st Jan 1929 | Box 14 \ 2 Scan027 | |
| Drawings for the 'SS' crankshaft rear oil retainer. | 18th Jan 1929 | Box 14 \ 2 Scan028 | |
| Proposal for 'SS' main bearings without liners, referencing blueprint LeC.2639. | 19th Jan 1929 | Box 14 \ 2 Scan029 | |
| Analysis and proposed solution for oil starvation in the 'SS' lower half crankchamber during heavy braking. | 24th Jan 1929 | Box 14 \ 2 Scan030 | |
| Table detailing specifications for 40/50HP Chassis Crankshafts. | 2nd Feb 1929 | Box 14 \ 2 Scan031 | |
| Loss of oil pressure after braking and proposing tests and sump modifications. | 2nd Feb 1929 | Box 14 \ 2 Scan032 | |
| Continued report comparing oil suction systems on various chassis, discussing issues and proposing strainer design improvements. | 15th Feb 1929 | Box 14 \ 2 Scan033 | |
| Requesting oil pressure figures for the 'SS' model during a cold start and warm-up period. | 15th Feb 1929 | Box 14 \ 2 Scan034 | |
| Maximum oil pressures for an 'SS' engine from a cold start. | 19th Feb 1929 | Box 14 \ 2 Scan035 | |
| Comparing oil pressures for valve gear lubrication during engine warming up versus normal operation. | 2nd Feb 1929 | Box 14 \ 2 Scan036 | |
| Maximum oil pressure values for 'SS' engines X.7010 and X.7060 on a cold start. | 19th Feb 1929 | Box 14 \ 2 Scan037 | |
| Oil leakage from the S.S. Crankshaft rear oil flinger, detailing clearances and an improved double flinger design. | 13th Mar 1929 | Box 14 \ 2 Scan038 | |
| Re-tinning operation for Nitralloy components. | 21th Mar 1929 | Box 14 \ 2 Scan039 | |
| Hardening process for nitro alloy crankshafts, particularly whether to harden the webs. | 27th Mar 1929 | Box 14 \ 2 Scan040 | |
| Technical table comparing different car crankshaft specifications and features. | 3rd May 1929 | Box 14 \ 2 Scan041 | |
| Cover note for a tabulated list of crankshafts. | 9th May 1929 | Box 14 \ 2 Scan042 | |
| Comparative specification table for crankshafts used in 20 HP and Phantom I & II car models. | 3rd Mar 1925 | Box 14 \ 2 Scan043 | |
| Design, materials, and adjustment of a car engine crankshaft damper. | 6th Mar 1929 | Box 14 \ 2 Scan044 | |
| Clarifying the stiffness of the J.2 series crankshaft and noting improvements to the 20 HP crankshaft. | 5th Jun 1929 | Box 14 \ 2 Scan045 | |
| Recommendation to suspend the machining of a chamfer on 'SS' crankshafts due to a decrease in stiffness. | 29th Jun 1929 | Box 14 \ 2 Scan046 | |
| Improved slipper flywheel and spring drive, outlining modifications needed for the crankshaft and wheelcase. | 26th Jul 1929 | Box 14 \ 2 Scan047 | |
| The torsional stiffness testing of a large pin crankshaft compared to standard models. | 29th Aug 1929 | Box 14 \ 2 Scan048 | |
| Requesting a drawing for a low inertia slipper wheel adapted to a stiffer crankshaft. | 4th Sep 1929 | Box 14 \ 2 Scan049 | |
| Machining and testing two S.S. Nitro Alloy crankshafts with different bearings. | 13th Sep 1929 | Box 14 \ 2 Scan050 | |
| Specification table for various crankshaft models and their applications. | 27th Nov 1929 | Box 14 \ 2 Scan051 | |
| Phantom II high-speed engine vibration experiments, investigating the effects of replacing the crankshaft and removing clutch components. | 8th Nov 1929 | Box 14 \ 2 Scan052 | |
| Test report detailing engine vibration analysis after fitting a crankshaft and flywheel. | 8th Nov 1929 | Box 14 \ 2 Scan053 | |
| Engine vibration analysis, observing crankcase movement and the effects of balance weights. | 1st Nov 1929 | Box 14 \ 2 Scan054 | |
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