| Description | Date | Identifier | |
| Strengthening a 20 HP chassis crankshaft to eliminate a 'bus' knock, noting it is still an experimental issue. | 26th May 1930 | Box 103 \ 3 scan0003 | |
| Test report on a 25 HP Nitralloy crankshaft for the China Engine C.11. | 21th Jun 1930 | Box 103 \ 3 scan0004 | |
| Comparison of wear marks on a standard crankshaft versus a Nitralloy crankshaft. | 31th Aug 1931 | Box 103 \ 3 scan0005 | |
| Crankshaft webs fouling the stiffening ribs on the China Engine Unit. | 2nd Jul 1930 | Box 103 \ 3 scan0006 | |
| Potential solutions for crankshaft vibration in a 25HP engine when approaching 70MPH. | 1st Oct 1930 | Box 103 \ 3 scan0007 | |
| Design decisions and improvements for the 25HP chassis and engine. | 12th Nov 1930 | Box 103 \ 3 scan0008 | |
| List of proposed engineering changes and improvements to various engine and chassis components. | 18th Dec 1930 | Box 103 \ 3 scan0009 | |
| Outlining the features of a proposed balanced crankshaft for a 25 HP engine. | 18th Dec 1930 | Box 103 \ 3 scan0010 | |
| Blueprint of a 20 HP crankshaft with 8 balance weights. | 17th Dec 1930 | Box 103 \ 3 scan0011 | |
| Proposed design and trial of an interlaced crankshaft for 6 and 12 cylinder engines. | 1st Dec 1930 | Box 103 \ 3 scan0012 | |
| Crankshaft balancing, materials, and vibration issues for 25HP and 45HP engines. | 20th Dec 1930 | Box 103 \ 3 scan0013 | |
| Engine and suspension improvements for the 25HP and 45HP models. | 23th Dec 1930 | Box 103 \ 3 scan0014 | |
| Design and balancing of a 25HP & 45HP crankshaft. | 23th Dec 1930 | Box 103 \ 3 scan0015 | |
| Engine crankshaft balancing, counterweights, and flywheel modifications for smoother high-speed operation. | 7th Jan 1931 | Box 103 \ 3 scan0016 | |
| Polar diagrams of big end bearing loads for the Condor III engine. | 7th Jan 1931 | Box 103 \ 3 scan0017 | |
| Polar diagram of main bearing loads for the Condor III engine. | 18th May 1923 | Box 103 \ 3 scan0018 | |
| Polar diagram showing the main bearing loads for the Condor III engine. | 17th May 1923 | Box 103 \ 3 scan0019 | |
| Polar diagram of main bearing loads for the Condor III engine at 1900 R.P.M. | 16th Jul 1924 | Box 103 \ 3 scan0020 | |
| Polar diagram showing the main bearing loads for the Condor III engine. | 16th Jul 1924 | Box 103 \ 3 scan0021 | |
| Resetting the friction load on a low inertia crankshaft damper. | 13th Jan 1931 | Box 103 \ 3 scan0022 | |
| Torsional periods found on a 25 HP unit with 12 balance weights. | 15th Jan 1931 | Box 103 \ 3 scan0023 | |
| Standardisation of chassis parts for the 20/25 HP Chassis, specifically the Low Inertia Spring Drive. | 15th Jan 1931 | Box 103 \ 3 scan0024 | |
| Decision not to proceed with the production of a new part, including associated costs. | 15th Jan 1931 | Box 103 \ 3 scan0025 | |
| Tests on 25 HP crankshaft dimensions and critical speeds. | 15th Jan 1931 | Box 103 \ 3 scan0026 | |
| Report analyzing crankshaft pin sizes, balance weights, and their effect on critical speed and inertia. | 15th Jan 1931 | Box 103 \ 3 scan0027 | |
| Design of a crankshaft damper and spring drive for the Japan 3 project. | 15th Jan 1931 | Box 103 \ 3 scan0028 | |
| Design of a simplified crankshaft damper and spring drive for the Japan 3 project. | 1st Jan 1931 | Box 103 \ 3 scan0029 | |
| Design improvements for the 'Japan Engine', focusing on crankshafts, bearings, and structural stiffness. | 21th Jan 1931 | Box 103 \ 3 scan0030 | |
| Sketch of a starter handle shaft tube and a telegram discussing design simplification for economical production. | 21th Jan 1931 | Box 103 \ 3 scan0031 | |
| Confirmation of a telegram suggesting tests on available China crankshafts with different pin diameters. | 22th Jan 1931 | Box 103 \ 3 scan0032 | |
| Revisions to the Japan 3 general engine scheme, specifically regarding shaft diameters and cylinder skirts. | 22th Jan 1931 | Box 103 \ 3 scan0033 | |
| Telegram from Elliott to Hives suggesting tests on available China crankshafts with different pin diameters. | 22th Jan 1937 | Box 103 \ 3 scan0034 | |
| The 'Japan 3' crankshaft, attaching a print showing the pinion formed solid with the shaft. | 24th Jan 1931 | Box 103 \ 3 scan0035 | |
| Design of crankshaft pinions and timing gears to address flywheel vibration issues on a 25HP engine. | 26th Jan 1931 | Box 103 \ 3 scan0036 | |
| Four comparative cross-sectional sketches of a journal and flywheel flange with annotations. | 27th Jan 1931 | Box 103 \ 3 scan0037 | |
| Sending an experimental double rear crank bearing for testing on a 20/25 engine. | 27th Jan 1931 | Box 103 \ 3 scan0038 | |
| Investigation into three schemes for crankshaft balance weights for the 'China IV' engine, including a comparative table of bearing loads. | 9th Mar 1931 | Box 103 \ 3 scan0039 | |
| Comparative load tests on a new crankshaft design (Des.1364) and the instruction for a new shaft for development. | 9th Mar 1921 | Box 103 \ 3 scan0040 | |
| Blueprint comparing three different balance weight schemes. | 9th Mar 1921 | Box 103 \ 3 scan0041 | |
| Secret memorandum discussing design proposals for a crankshaft damper and engine suspension system. | 14th Mar 1931 | Box 103 \ 3 scan0042 | |
| Technical note on the application and effects of crankshaft balance weights for aero and car engines. | 2nd Apr 1931 | Box 103 \ 3 scan0043 | |
| Analysis of crankshaft balancing schemes for a 7-bearing, 6-cylinder engine. | 2nd Apr 1931 | Box 103 \ 3 scan0044 | |
| Discussion and comparison of different crankshaft balancing schemes, including one for aero use and another used by Chrysler. | 2nd Apr 1931 | Box 103 \ 3 scan0045 | |
| Comparison of five alternative crankshaft balance weight schemes. | 2nd Apr 1931 | Box 103 \ 3 scan0046 | |
| Comparison table of bearing loads for various crankshaft balancing schemes. | 2nd Apr 1931 | Box 103 \ 3 scan0047 | |
| Secret memo referencing a print about crankshafts and bearings. | 9th Apr 1931 | Box 103 \ 3 scan0048 | |
| Objectives and different schemes for using engine balance weights. | 12th Apr 1931 | Box 103 \ 3 scan0049 | |
| Request to fit an eight balance weight scheme on a large pin 25 HP crankshaft. | 5th May 1931 | Box 103 \ 3 scan0050 | |
| Scheme detailing the balance weight setup for a 25 HP shaft. | 4th May 1931 | Box 103 \ 3 scan0051 | |
| Data sheet detailing torsional periods, balance metrics, and weights for Phantom II and 25 HP engine components. | 1st May 1931 | Box 103 \ 3 scan0052 | |
| Road tests of a 25 HP crankshaft to determine its critical speed and torsional oscillation. | 9th May 1931 | Box 103 \ 3 scan0053 | |
| Blueprint for a Crankshaft Balance Weight for a 20 HP Chassis. | 12th May 1931 | Box 103 \ 3 scan0054 | |
| Technical memorandum detailing component specifications and modifications for the 25 HP - JAPAN 1 model. | 12th May 1931 | Box 103 \ 3 scan0055 | |
| Modifications to the crankchamber, brakes, rear axle, and petrol pump. | 2nd May 1931 | Box 103 \ 3 scan0056 | |
| Use and testing of balance weights on crankshafts for the 25 HP and Phantom II engines. | 16th May 1931 | Box 103 \ 3 scan0057 | |
| Crankshaft balance weights and critical speeds for the 25 HP and Phantom 11 engines. | 16th May 1931 | Box 103 \ 3 scan0058 | |
| Schematic drawing and calculations for crankshaft balance weight schemes. | 16th May 1931 | Box 103 \ 3 scan0059 | |
| Engine smoothness, the effects of balance weights on the flywheel, and various weight schemes. | 18th May 1931 | Box 103 \ 3 scan0060 | |
| Design and experimentation of engine balance weights, comparing 8 and 12 weight schemes. | 19th May 1931 | Box 103 \ 3 scan0061 | |
| Flywheel balance weights and design improvements for the 25 HP engine. | 19th May 1931 | Box 103 \ 3 scan0062 | |
| Technical memorandum on the effect of balance weights on flywheel wobble in Phantom II and 25 HP models. | 23th May 1931 | Box 103 \ 3 scan0063 | |
| Flywheel and crankshaft testing, comparing performance with 0, 6, and 12 balance weights. | 23th May 1931 | Box 103 \ 3 scan0064 | |
| Request to rebuild a cast iron crankcase unit with parts from a 16-G4 engine. | 27th May 1931 | Box 103 \ 3 scan0065 | |
| Requesting the production of twelve balance weights for a 25 HP crankshaft. | 29th May 1931 | Box 103 \ 3 scan0066 | |
| Fitting twelve balance weights to the big pin 25 HP crankshaft. | 29th May 1931 | Box 103 \ 3 scan0067 | |
| Insufficient material found on 20/25HP crankshaft forgings and the necessary alterations to existing dies. | 9th Jul 1931 | Box 103 \ 3 scan0068 | |
| Experiments using balance weights to eliminate flywheel vibrations on a 25 HP engine. | 22th Jul 1931 | Box 103 \ 3 scan0069 | |
| Blueprint for balance weights for a 25 HP crankshaft. | 23th Jul 1931 | Box 103 \ 3 scan0070 | |
| Sketch of balance weights used on the big pin 25 HP crankshaft. | 23th Jul 1931 | Box 103 \ 3 scan0071 | |
| Modifications to the 25 HP crankshaft to improve high-speed smoothness. | 4th Aug 1931 | Box 103 \ 3 scan0072 | |
| Blueprint for a stiffer 2-inch pin crankshaft for a 25 HP engine. | 5th Aug 1931 | Box 103 \ 3 scan0073 | |
| Proposal outlining potential performance improvements for the 25 HP car model. | 5th Aug 1931 | Box 103 \ 3 scan0074 | |
| Intentions and methods for balancing crankshafts, comparing different approaches. | 17th Aug 1931 | Box 103 \ 3 scan0075 | |
| Experimental crankshafts for the 20/25 HP chassis, concluding with a decision to alter the dies. | 19th Aug 1931 | Box 103 \ 3 scan0076 | |
| Internal memorandum discussing engine vibration issues on the 25HP model, focusing on balance weights and flywheel wobble. | 19th Aug 1931 | Box 103 \ 3 scan0077 | |
| Scheme for attaching intermediate half weights to an existing 20/25 crankshaft on the Chrysler principle. | 1st Aug 1931 | Box 103 \ 3 scan0078 | |
| Suggestion to produce future car crankshafts, particularly for the 25 HP model, from hardened material based on successful testing. | 21th Aug 1931 | Box 103 \ 3 scan0079 | |
| Crankshaft balance weights, test results, and production decisions for various engine models. | 21th Aug 1931 | Box 103 \ 3 scan0080 | |
| Scheme for fitting Chrysler type balance weights to a crankshaft, including a diagram of the webs. | 22th Aug 1931 | Box 103 \ 3 scan0081 | |
| Scheme for 20/25HP balance weights and a stiffer crank, based on the Chrysler principle. | 22th Aug 1931 | Box 103 \ 3 scan0082 | |
| 1/2 balance weights for fitting to an IV-G6 crankshaft. | 22th Aug 1931 | Box 103 \ 3 scan0083 | |
| Analysis of three failures concerning the low inertia damper spring plate. | 24th Aug 1931 | Box 103 \ 3 scan0084 | |
| The production of crankshafts in nitrogen hardening steel for the 20/25 HP engine. | 24th Aug 1931 | Box 103 \ 3 scan0085 | |
| Confirming instructions to hold up production of 25 HP crankshaft dies due to a design alteration. | 26th Aug 1931 | Box 103 \ 3 scan0086 | |
| Tests on flywheel vibration and the effect of different balance weight configurations on a 25 HP engine. | 27th Aug 1931 | Box 103 \ 3 scan0087 | |
| Blueprint diagram showing three numbered line graphs or schematics. | 27th Aug 1931 | Box 103 \ 3 scan0088 | |
| Design and application of balance weights for the 20/25 HP crankshaft. | 27th Aug 1931 | Box 103 \ 3 scan0089 | |
| On harmonic balancer designs, comparing American cars and considering options for a 25 HP engine. | 27th Aug 1931 | Box 103 \ 3 scan0090 | |
| Balance weight schemes for the 25HP engine, covering production, experimental, and new shaft designs. | 28th Aug 1931 | Box 103 \ 3 scan0091 | |
| Sending a print of drawing LeC. 2938, concerning the J.3. crankcase, cylinder block, and crankshaft. | 29th Aug 1931 | Box 103 \ 3 scan0092 | |
| Instruction to manufacture a crankshaft for a new unit, 18-G4. | 29th Aug 1931 | Box 103 \ 3 scan0093 | |
| On a general scheme for crankcase, cylinder block and crankshaft, noting updates to rear main bearings and timing gear lubrication. | 5th Sep 1931 | Box 103 \ 3 scan0094 | |
| Request to issue a detail drawing for a 20/25 HP Crankshaft with a list of required modifications. | 9th Sep 1931 | Box 103 \ 3 scan0095 | |
| Modifications to a 20/25 crankshaft using existing forgings. | 9th Sep 1931 | Box 103 \ 3 scan0096 | |
| Proposal from Mr. Elliott for a balanced crankshaft for the 20/25 model. | 10th Sep 1931 | Box 103 \ 3 scan0097 | |
| Alterations to crankshafts for the future 'China' series. | 14th Sep 1931 | Box 103 \ 3 scan0098 | |
| Modifications to the 'China' modified crankshaft, including increasing web width and adjusting oilway drilling. | 16th Sep 1931 | Box 103 \ 3 scan0099 | |
| Providing instructions for machining a 25 HP crankshaft to specific dimensions and drawings. | 19th Sep 1931 | Box 103 \ 3 scan0100 | |
| Test of Chrysler balance weights on a 25 HP engine to eliminate flywheel vibration. | 21th Sep 1931 | Box 103 \ 3 scan0101 | |
| Manufacturing scheme for 20/25 HP crankshafts and holding the sinking of dies for further production. | 22th Sep 1931 | Box 103 \ 3 scan0102 | |
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