| Description | Date | Identifier | |
| Performance graph comparing Brake Horse Power and B.M.E.P. for different camshafts on a GOS-C1 engine. | 19th Dec 1929 | Box 102 \ 5 scan0036 | |
| Test report comparing the performance of a long duration 112 degree 'China' camshaft with standard and 'Japan' configurations. | 19th May 1930 | Box 102 \ 5 scan0037 | |
| Note on the comparative effects of long duration camshafts with single and double throat carburetters. | 23th May 1930 | Box 102 \ 5 scan0038 | |
| Twin carburetter tests and camshaft comparisons conducted on the 'Japan' engine. | 23th May 1930 | Box 102 \ 5 scan0039 | |
| Test report on engine performance relating to riser pipes, induction, hot spots, and choke sizes. | 23th May 1930 | Box 102 \ 5 scan0040 | |
| Engine performance tests comparing different duration camshafts and carburettor setups. | 23th May 1930 | Box 102 \ 5 scan0041 | |
| Summary of engine experiments on 'Japan' regarding carburetter and camshaft performance. | 23th May 1930 | Box 102 \ 5 scan0042 | |
| Table of actual valve timing data for various camshaft settings from twin carburettor tests on the 'Japan' engine. | 27th May 1930 | Box 102 \ 5 scan0043 | |
| Performance graph comparing large and small bore induction manifolds on a 'Japan' engine with twin Zenith carburettors. | 21th May 1930 | Box 102 \ 5 scan0044 | |
| Performance graph comparing different camshafts on the 'Japan' engine configuration, plotting B.HP and B.M.E.P. against R.P.M. | 21th May 1930 | Box 102 \ 5 scan0045 | |
| Performance comparison graph of Twin Zenith versus Standard Chassis carburetters with different camshafts. | 22th May 1930 | Box 102 \ 5 scan0046 | |
| Blueprint detailing the arrangement of a twin Zenith carburettor induction pipe for a 'Japan Engine'. | 27th May 1930 | Box 102 \ 5 scan0047 | |
| Drawing LeC. 2864, showing details for the Japan 3 valve rocker gear and cylinder head. | 2nd Sep 1931 | Box 102 \ 5 scan0048 | |
| The valve rocker gear and cylinder head for the 'Japan 3' engine. | 9th Feb 1931 | Box 102 \ 5 scan0049 | |
| Proposing changes to a casting's plugging methods and inspection holes, with sketches. | 12th May 1931 | Box 102 \ 5 scan0050 | |
| Request to manufacture camshafts for a 25 HP Japan engine. | 12th May 1931 | Box 102 \ 5 scan0051 | |
| Blueprint of a camshaft profile and its associated timing diagram for a 25 HP engine. | 12th May 1931 | Box 102 \ 5 scan0052 | |
| Comparative table of valve train specifications for 25HP Japan and Phantom II engines. | 12th May 1931 | Box 102 \ 5 scan0053 | |
| Requesting the production of two camshafts for a 25 HP engine using Kestrel cam forms. | 12th May 1931 | Box 102 \ 5 scan0054 | |
| J.1 specification document detailing proposed changes to an engine, flywheel, gearbox, engine mounting, and camshaft. | 21th May 1931 | Box 102 \ 5 scan0055 | |
| Notes and timing diagrams for 'Try No 1 Camshaft' and other vehicle components including the back axle, brakes, and engine head. | 21th May 1931 | Box 102 \ 5 scan0056 | |
| Design considerations for petrol pumps, radiators, and carburetters. | 29th May 1931 | Box 102 \ 5 scan0057 | |
| Power output results from testing different camshafts for the Japan I project. | 29th May 1931 | Box 102 \ 5 scan0058 | |
| Analysis of engine performance concerning valve timing, cams, and silencers for various models, including diagrams of inlet and exhaust duration. | 22th May 1930 | Box 102 \ 5 scan0059 | |
| Performance graph comparing a twin Zenith carburettor against a standard chassis carburettor with different camshafts. | 22th May 1930 | Box 102 \ 5 scan0060 | |
| Performance graph comparing a Twin Zenith carburettor against a Standard carburettor with different camshaft configurations. | 11th Jul 1930 | Box 102 \ 5 scan0061 | |
| Engine power outputs, detailing test results and required component improvements for various models. | 30th May 1931 | Box 102 \ 5 scan0062 | |
| Conclusions on camshaft design, performance limitations, and potential improvements for car engines. | 5th Jun 1931 | Box 102 \ 5 scan0063 | |
| Permissible duration for inlet valve opening in car engines by referencing aero cams. | 5th Jun 1931 | Box 102 \ 5 scan0064 | |
| Suitability and potential modification of R. engine camshafts for car work. | 5th Jun 1931 | Box 102 \ 5 scan0065 | |
| Practical limitations of modifying cams and valve areas for luxury car engines. | 9th Jun 1931 | Box 102 \ 5 scan0066 | |
| Instruction to produce a new set of .2 longer valves for the 25 HP 'Japan' unit. | 29th Jun 1931 | Box 102 \ 5 scan0067 | |
| Prints for 25 HP high lift rockers to give increased valve lift. | 29th Aug 1931 | Box 102 \ 5 scan0068 | |
| Technical discussion on achieving increased valve lift for the 25HP 'CHINA' engine by altering rocker ratios and cams. | 12th Sep 1931 | Box 102 \ 5 scan0069 | |
| Telephone conversation note detailing camshaft modifications for 20/25 HP and Phantom II engines. | 4th Sep 1931 | Box 102 \ 5 scan0070 | |
| Camshaft and carburetter improvements, specifically for the 20/25 model. | 23th Sep 1931 | Box 102 \ 5 scan0071 | |
| J.3. valve rocker and the calculation of its lift. | 23th Sep 1931 | Box 102 \ 5 scan0072 | |
| New camshaft design for a 25 HP engine, comparing theoretical and practical valve timings. | 24th Sep 1931 | Box 102 \ 5 scan0073 | |
| Summary of tests on power output for the 'Japan' project, detailing carburettor, induction, and valve timing adjustments. | 24th Sep 1931 | Box 102 \ 5 scan0074 | |
| Summary report on tests of induction pipe capacity, carburetter performance, and inlet valve clearance. | 24th Sep 1931 | Box 102 \ 5 scan0075 | |
| Graph comparing the performance of three different carburettors based on B.HP and B.M.E.P. against R.P.M. | 19th Aug 1931 | Box 102 \ 5 scan0076 | |
| Performance chart and specification sheet for the 'Japan Unit' engine. | 18th Sep 1931 | Box 102 \ 5 scan0077 | |
| Performance comparison chart for different carburettor arrangements on a Japan Unit engine. | 18th Sep 1931 | Box 102 \ 5 scan0078 | |
| Graph plotting the effect of increasing induction pipe capacity on engine performance, showing B.HP vs R.P.M. | 1st Jul 1940 | Box 102 \ 5 scan0079 | |
| Graph comparing engine performance with two different timing alterations on a 112° camshaft. | 23th Sep 1931 | Box 102 \ 5 scan0080 | |
| Graph comparing induction pipe capacities for a Japan Unit based on different engine configurations. | 23th Sep 1931 | Box 102 \ 5 scan0081 | |
| Performance comparison graph for single versus double Claudel carburettors. | 23th Sep 1931 | Box 102 \ 5 scan0082 | |
| Close-up, side-view photograph of an installed automobile engine. | 23th Sep 1931 | Box 102 \ 5 scan0083 | |
| Six photographs showing various engine intake manifold and carburettor arrangements. | 28th Sep 1931 | Box 102 \ 5 scan0084 | |
| Technical memorandum discussing car engine performance, with conclusions on inlet valves, cam design, and timing. | 28th Sep 1931 | Box 102 \ 5 scan0085 | |
| Request to manufacture a 25 HP camshaft according to an accompanying sketch. | 28th Sep 1931 | Box 102 \ 5 scan0086 | |
| Blueprint detailing the valve timing and cam positions for a 25 HP camshaft. | 28th Sep 1931 | Box 102 \ 5 scan0087 | |
| Specifications for the adaption of a Kestrel short duration high lift camshaft. | 28th Sep 1931 | Box 102 \ 5 scan0088 | |
| Change in cam angle and timing for the 20/25 HP engine. | 2nd Oct 1931 | Box 102 \ 5 scan0089 | |
| Correction note regarding a report on power output for Japan, clarifying units of measurement and test parameters. | 2nd Oct 1931 | Box 102 \ 5 scan0090 | |
| Internal memorandum analysing the results of tests on 25 HP power output, specifically concerning increased valve lift and clearance. | 5th Oct 1931 | Box 102 \ 5 scan0091 | |
| Performance graph comparing high and low lift rockers using a single carburettor Japan unit. | 5th Oct 1931 | Box 102 \ 5 scan0092 | |
| Performance comparison graph of high and low lift rockers with different valve timings and configurations. | 5th Oct 1931 | Box 102 \ 5 scan0093 | |
| Comparison of high and low lift rockers with ramming using Claudel carburettors, showing performance graphs and valve timing diagrams. | 5th Oct 1931 | Box 102 \ 5 scan0094 | |
| Graph showing the effect of increasing clearance around the inlet valve on engine performance. | 5th Oct 1931 | Box 102 \ 5 scan0095 | |
| Graph showing the effect of increasing clearance around the inlet valve on engine performance with twin Zenith carburettors. | 5th Oct 1931 | Box 102 \ 5 scan0096 | |
| Sketch showing modifications to a Japan Cylinder Head to give increased clearance around the inlet valves. | 4th Nov 1931 | Box 102 \ 5 scan0097 | |
| Outlining the requirement for new type E.57177 camshafts for several existing engine units. | 4th Nov 1931 | Box 102 \ 5 scan0098 | |
| Carburetter design choices, favouring a single carburetter over the S.U. type. | 10th Nov 1931 | Box 102 \ 5 scan0099 | |
| Use of long-toed cams and steel push rods to manage tappet clearance and reduce engine noise. | 19th Nov 1931 | Box 102 \ 5 scan0100 | |
| Cored hole in the crankcase wall to prevent oil buildup in the camshaft chamber. | 18th Nov 1931 | Box 102 \ 5 scan0101 | |
| Tests on tappet clearance and the resulting noise levels for the 40/50 standard camshaft. | 24th Nov 1931 | Box 102 \ 5 scan0102 | |
| Camshaft timing specifications for the 'Hot Stuff' Japan Unit. | 17th Dec 1931 | Box 102 \ 5 scan0103 | |
| Technical memorandum regarding the standardization of higher lift camshafts and stronger valve springs for the 25HP engine. | 24th Nov 1931 | Box 102 \ 5 scan0104 | |
| Comparing standard and proposed production valve springs for chassis. | 24th Nov 1931 | Box 102 \ 5 scan0105 | |
| Graph comparing the load, stress, and deflection characteristics of two 25 HP chassis valve springs. | 23th Nov 1931 | Box 102 \ 5 scan0106 | |
| Blueprint comparing inlet, standard, and improved exhaust valves, with handwritten modification proposals. | 23th Nov 1931 | Box 102 \ 5 scan0107 | |
| Request to produce a new 'China' camshaft with modified timing for the exhaust cam. | 9th Dec 1931 | Box 102 \ 5 scan0108 | |
| Power output improvements from tests on engines with higher compression pistons and different exhaust systems. | 10th Dec 1931 | Box 102 \ 5 scan0109 | |
| Performance chart comparing the Brake Horsepower (BHP) of a CXI high-lift unit with three different manifold and exhaust setups. | 4th Dec 1931 | Box 102 \ 5 scan0110 | |
| Graph showing power output and compression pressure for a CTX Unit with various exhaust configurations. | 4th Dec 1931 | Box 102 \ 5 scan0111 | |
| Graph of engine power output curves against RPM for various exhaust configurations, including a valve timing diagram. | 1st Dec 1931 | Box 102 \ 5 scan0112 | |
| Power output chart comparing two configurations of the C.10 Unit for 19 G.IV. | 1st Dec 1931 | Box 102 \ 5 scan0113 | |
| Request to produce a camshaft for a high output Japan unit, specifying a drawing number and angle between cam centres. | 17th Dec 1931 | Box 102 \ 5 scan0114 | |
| Request to produce a modified camshaft designated 'China Camshafts' with a specific timing. | 30th Dec 1931 | Box 102 \ 5 scan0115 | |
| Calculations and timing diagrams for an improved camshaft design for China. | 9th Jan 1932 | Box 102 \ 5 scan0116 | |
| Engine power improvements, including valve timing, superchargers, and tappet clearance. | 9th Jan 1932 | Box 102 \ 5 scan0117 | |
| Standardisation of a camshaft with increased valve lift and timing. | 5th Jan 1932 | Box 102 \ 5 scan0118 | |
| Standardisation document for a chassis part, specifying its first application and associated costs. | 12th Mar 1932 | Box 102 \ 5 scan0119 | |
| Camshaft timing and performance tests for the 20-25HP (China) Unit. | 29th Feb 1932 | Box 102 \ 5 scan0120 | |
| Performance graph of B.HP and B.M.E.P. vs R.P.M. for a 20-25 HP China Unit engine with various valve timings. | 29th Aug 1932 | Box 102 \ 5 scan0121 | |
| Performance graph comparing B.HP and BMEP against R.P.M. for two different camshaft timing configurations. | 29th Feb 1932 | Box 102 \ 5 scan0122 | |
| Instruction to manufacture a camshaft for the J.3 unit with a specific cam form and angle. | 1st Mar 1932 | Box 102 \ 5 scan0123 | |
| Analysis of experimental camshafts, focusing on inlet duration and valve timing. | 18th Apr 1932 | Box 102 \ 5 scan0124 | |
| Camshaft design, valve timing, and engine test results. | 18th Apr 1932 | Box 102 \ 5 scan0125 | |
| Summary of test bed measurements for seven different existing camshafts. | 18th Apr 1932 | Box 102 \ 5 scan0126 | |
| Blueprint comparing four alternative engine valve timings for Japan III, Peregrine, and Bensport cam forms. | 18th Apr 1932 | Box 102 \ 5 scan0127 | |
| Engine noise issues, focusing on tappet and camshaft design for improvement. | 11th May 1932 | Box 102 \ 5 scan0128 | |
| Technical memo discussing issues and potential solutions for oil temperature, auto-adjustment, clutch, and crankshaft dampers. | 11th May 1932 | Box 102 \ 5 scan0129 | |
| Technical memorandum discussing the design and materials for damper wheels, including a cross-section diagram. | 24th Jun 1932 | Box 102 \ 5 scan0130 | |
| Technical memorandum comparing engine performance based on valve size, lift, and duration of opening for 3' Bore 'China' and 3.25' Bore 'J.1' engines. | 24th Jun 1932 | Box 102 \ 5 scan0131 | |
| Analysis of engine performance comparing valve sizes, camshaft duration, and turbulence effects between various engines. | 24th Jun 1932 | Box 102 \ 5 scan0132 | |
| Summary of findings on engine performance relating to exhaust systems, camshafts, and valve areas. | 24th Jun 1932 | Box 102 \ 5 scan0133 | |
| Comparative table of specifications for various engine models. | 24th Jun 1932 | Box 102 \ 5 scan0134 | |
| Graph showing the effect of increased valve lift on engine performance at a 4.78 compression ratio. | 24th Jun 1932 | Box 102 \ 5 scan0135 | |
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