| Description | Date | Identifier | |
| Design and fitting of a hand barring gear and pumps for armoured cars. | 25th Oct 1920 | Box 182 \ M21 img061 | |
| With a sketch detailing the dashboard control mechanism for a 40/50 HP tyre pump on an armoured car. | 21th Oct 1920 | Box 182 \ M21 img062 | |
| Alternative lubrication method for a tyre pump on a 40/50 HP chassis. | 26th Oct 1920 | Box 182 \ M21 img063 | |
| Critique of War Office proposals for fitting an Eagle engine into tanks, highlighting design flaws and suggesting alternatives. | 8th Oct 1920 | Box 182 \ M21 img064 | |
| Critique of design choices for the Cardan shaft, flywheel, starter gear, governor, and throttle valves. | 29th Oct 1920 | Box 182 \ M21 img065 | |
| Design criticisms and seeking direction on whether to proceed as instructed, await further designs, or prepare modifications. | 20th Oct 1920 | Box 182 \ M21 img066 | |
| Letter proposing a new back axle for armoured cars to address performance issues like climbing, cooling, and clutch slipping. | 28th Jun 1921 | Box 182 \ M21 img067 | |
| Letter to Col. Robinson discussing vehicle performance, modifications to brakes, axles, and clutches for heavy loads. | 28th Jun 1921 | Box 182 \ M21 img068 | |
| Technical analysis of vehicle climbing capabilities, discussing maximum weight on gradients and M.E.P. figures. | 1st Jul 1921 | Box 182 \ M21 img069 | |
| Design and supply of a new axle for armoured cars for the India Office. | 1st Jul 1921 | Box 182 \ M21 img070 | |
| The design and cost estimation for a double reduction gear rear axle for armoured cars. | 1st Aug 1921 | Box 182 \ M21 img071 | |
| Costs and urgency of an estimate for axles to be fitted to government chassis destined for India. | 1st Aug 1921 | Box 182 \ M21 img072 | |
| Testing limitations of an armoured car, proposing tests with a reduced load due to issues with the current axle. | 29th Aug 1921 | Box 182 \ M21 img073 | |
| Modification of a drawing for the rear lamp position on Indian Armoured Cars. | 5th Feb 1921 | Box 182 \ M21 img074 | |
| Performance issues of armoured cars for India and the War Office, specifically their inability to climb steep gradients with heavy loads, and proposed alterations. | 27th Jun 1921 | Box 182 \ M21 img075 | |
| Performance comparison report against a Crossley car, discussing gear ratios, sand tests, and radiator boiling issues. | 27th Jun 1921 | Box 182 \ M21 img076 | |
| Vehicle performance issues with the gear ratio, clutch overheating, and hill climbing, requesting suggestions for improvements. | 27th Jun 1921 | Box 182 \ M21 img077 | |
| Summary of investigations into the results of armoured car tests, detailing weights, gradients, and performance calculations. | 27th Jun 1921 | Box 182 \ M21 img078 | |
| Technical analysis of vehicle performance, comparing gear ratios, load-carrying capacity, and engine specifications against a Crossley lorry. | 27th Jun 1921 | Box 182 \ M21 img079 | |
| Trip to London for meetings and a request to collect a Delage car to drive back to Derby. | 28th Nov 1921 | Box 182 \ M21 img080 | |
| The evaporative cooling system for the Phantom I armoured car. | 12th Apr 1933 | Box 182 \ M21 img081 | |
| Conclusions on a radiator warning lamp and a hotwell condensate injector system for evaporatively cooled engines. | 12th Apr 1933 | Box 182 \ M21 img082 | |
| Design and testing of a Phantom I evaporative cooling system and its special radiator. | 12th Apr 1933 | Box 182 \ M21 img083 | |
| Road and system tests of an engine's cooling system, injector performance, and radiator suitability. | 12th Apr 1933 | Box 182 \ M21 img084 | |
| Stop and restart tests, a non-return valve, and the advantages of an evaporatively cooled system for armoured cars. | 9th May 1933 | Box 182 \ M21 img085 | |
| Letter to Colonel N. Hudson discussing an internal report and performance issues of an evaporatively-cooled Phantom I armoured car. | 9th May 1933 | Box 182 \ M21 img086 | |
| Page 2 of a letter to Colonel N. Hudson regarding a car's performance over a 200-mile run. | 9th May 1933 | Box 182 \ M21 img087 | |
| Gearbox and differential requirements for six-wheeled vehicles for the India War Department. | 15th Apr 1930 | Box 182 \ M21 img088 | |
| Suggestion to move the differential to the gearbox to improve locking functionality, requiring a double transmission shaft. | 15th Apr 1930 | Box 182 \ M21 img089 | |
| Notification regarding the completion of assembly for chassis 1. E+X. | 30th Jun 1919 | Box 183 \ M22 img001 | |
| Notes from a visit with Mr. Royce detailing his preferences for wheels and specifications for dynamos and switchboards. | 16th Dec 1918 | Box 183 \ M22 img002 | |
| Index of topics from a conference on proposed experimental work and design alterations. | 30th Jan 1919 | Box 183 \ M22 img003 | |
| Aero engine flight tests, car production programs, radiator design, and battery ignition systems. | 30th Jan 1919 | Box 183 \ M22 img004 | |
| Ignition, lighting, battery, and chassis fuel feed systems. | 30th Jan 1919 | Box 183 \ M22 img005 | |
| Discussion of an air valve mechanism, an anti-theft gear lock, valve gear covers, and foot warmers. | 30th Jan 1919 | Box 183 \ M22 img006 | |
| Decisions on foot warmers, fenders, luggage carriers, and starting handles. | 30th Jan 1919 | Box 183 \ M22 img007 | |
| Formation of tool boxes using valances and a rack and pinion method for controlling body windows. | 30th Jan 1919 | Box 183 \ M22 img008 | |
| Adopting a new type of piston and the required alterations for engine lubrication. | 12th May 1915 | Box 183 \ M22 img009 | |
| Engine oiling, scraper rings, and the use of Zephyr pistons. | 12th May 1915 | Box 183 \ M22 img010 | |
| New cast iron piston design, its advantages, and potential fitment to car 49GB. | 12th May 1915 | Box 183 \ M22 img011 | |
| Extract from a report on chassis No. 7-CA concerning its poor road-holding capabilities. | 9th Sep 1916 | Box 183 \ M22 img012 | |
| Typed note expressing disapproval of large road wheels for a chassis. | 3rd Oct 1916 | Box 183 \ M22 img013 | |
| Report discussing fuel and oil consumption, with suggestions for experiments on the Post-War Chassis. | 3rd Oct 1916 | Box 183 \ M22 img014 | |
| Performance testing of a Packard car for comparison with an 'After-the-War' chassis. | 23th May 1917 | Box 183 \ M22 img015 | |
| Comparison of engine power curves using different carburettor and induction pipe setups. | 6th Jun 1917 | Box 183 \ M22 img016 | |
| Continued report on carburettor testing, induction pipe configuration, and fuel consumption improvements. | 24th Aug 1911 | Box 183 \ M22 img017 | |
| On the road performance of car 7-CA, detailing its speed and fuel consumption. | 11th Jun 1917 | Box 183 \ M22 img018 | |
| The petrol consumption of the 7-CA car at various speeds. | 10th Jul 1917 | Box 183 \ M22 img019 | |
| Road test and performance comparison between car models 7-CA and 49-GB from Derby to West Wittering. | 30th May 1919 | Box 183 \ M22 img020 | |
| Requesting information on the composition and properties of the metal Invar and other alloys. | 4th Nov 1918 | Box 183 \ M22 img021 | |
| Requirements and specifications for a dynamo system on a 4½ inch car engine. | 11th Nov 1918 | Box 183 \ M22 img022 | |
| Comparing different car dynamo systems for efficiency, weight, and power output. | 11th Nov 1918 | Box 183 \ M22 img023 | |
| Lamp testing failures, the suitability of half-watt lamps, and the responsibility for reducing accessory weight. | 11th Nov 1918 | Box 183 \ M22 img024 | |
| Proposed features for a new standard car model for the post-war period. | 20th Nov 1918 | Box 183 \ M22 img025 | |
| Modifications for the post-war 40/50 HP chassis, specifically regarding back axle tubes. | 26th Nov 1918 | Box 183 \ M22 img026 | |
| Design details for bevel gears, transmission, and brakes. | 26th Nov 1918 | Box 183 \ M22 img027 | |
| Wheel and brake designs, recommending Michelin disc wheels over Dunlop wire wheels. | 26th Nov 1918 | Box 183 \ M22 img028 | |
| Modifications to a cross steering tube and a stub axle, including design improvements to prevent failures. | 26th Nov 1918 | Box 183 \ M22 img029 | |
| Technical memo detailing design specifications for road springs, pistons, and valves. | 26th Nov 1918 | Box 183 \ M22 img030 | |
| Modifying ignition gear, the use of condensers, and the poor quality of trembler coils. | 26th Nov 1918 | Box 183 \ M22 img031 | |
| Modifications to coils and the possibility of adding an extra condenser for existing cars. | 26th Nov 1918 | Box 183 \ M22 img032 | |
| Carburation and petrol consumption tests on car 49-GB, comparing pre-war and post-war petrol quality. | 1st Feb 1919 | Box 183 \ M22 img033 | |
| Effects of fitting a blind to the radiator and the use of aluminium versus cast iron pistons. | 4th Feb 1919 | Box 183 \ M22 img034 | |
| Car test run in cold weather, detailing the effects of increased engine temperature on performance and fuel consumption. | 13th Mar 1919 | Box 183 \ M22 img035 | |
| Radiator modification and discussing the performance benefits of an extra water jacket on car 7-CA. | 13th Mar 1919 | Box 183 \ M22 img036 | |
| Consumption test report for a 40/50 chassis at various speeds. | 12th May 1919 | Box 183 \ M22 img037 | |
| The supply and use of new K.L.G. spark plugs for chassis X.1918. | 14th May 1919 | Box 183 \ M22 img038 | |
| From Mr. Royce regarding a seized brake cable fork on chassis 7 CA, with suggestions for improvements. | 1st Aug 1919 | Box 183 \ M22 img039 | |
| Testing of a low-geared back axle and proposals for further tests. | 12th Feb 1920 | Box 183 \ M22 img040 | |
| Advantages of lower axle gear following tests on car 49 GB at Brooklands. | 25th Jun 1920 | Box 183 \ M22 img041 | |
| Test data sheet recording car performance, including acceleration, flying start, and lap speeds under various conditions. | 19th Jul 1917 | Box 183 \ M22 img042 | |
| Comparison of car speeds based on different axle ratios and tyre sizes for 40/50 models. | 30th Jun 1920 | Box 183 \ M22 img043 | |
| 400-mile test run of chassis 1.E.X, detailing engine performance, vibrations, and fuel consumption. | 28th Jul 1919 | Box 183 \ M22 img044 | |
| The success of a new car model, highlighting an issue with piston knock when the engine is cold and discussing potential causes and solutions. | 21th Aug 1919 | Box 183 \ M22 img045 | |
| Solutions for piston knocks and oiling issues. | 21th Aug 1919 | Box 183 \ M22 img046 | |
| Continued report on engine piston performance, compression, and lubrication. | 21th Aug 1919 | Box 183 \ M22 img047 | |
| Extract detailing tests on engine oiling, consumption, carbon deposits, and experiments with modified pistons. | 20th Sep 1919 | Box 183 \ M22 img048 | |
| Modifications to the battery ignition system and the effects on engine running. | 21th Nov 1919 | Box 183 \ M22 img049 | |
| Ignition faults due to sooty plugs, comparing mica and porcelain types, and recommending better quality petrol. | 1st Nov 1919 | Box 183 \ M22 img050 | |
| Refitting of chassis 49 GB with newly standardised parts, comparing its suitability with chassis 1 EX. | 1st Nov 1919 | Box 183 \ M22 img051 | |
| Expressing frustration over delays in modifying the battery ignition wiring arrangement. | 8th Dec 1919 | Box 183 \ M22 img052 | |
| Improvements to electrical wiring arrangements by using smaller, neater wires and enclosing them in tubes. | 8th Dec 1919 | Box 183 \ M22 img053 | |
| Dissatisfaction with the quality of electrical work and finish on a model chassis. | 8th Dec 1919 | Box 183 \ M22 img054 | |
| Investigation into ignition failure, concluding with the necessity of using wide spark plug gaps for battery ignition systems. | 30th Dec 1919 | Box 183 \ M22 img055 | |
| Improvements to engine ignition systems, specifically spark gaps and coil windings. | 30th Dec 1919 | Box 183 \ M22 img056 | |
| Positioning of the starter switch and the construction of the ignition coil. | 8th Jan 1920 | Box 183 \ M22 img057 | |
| Decision to revert to pinned valve tappets for the 40/50 HP chassis to reduce noise. | 1st Nov 1919 | Box 183 \ M22 img058 | |
| Sale of an experimental car and the specifications for a replacement vehicle. | 24th Mar 1920 | Box 183 \ M22 img059 | |
| Blown fuse failure on chassis 1EX, critiquing the reliability of Lucas fuses and switches. | 10th Jun 1920 | Box 183 \ M22 img060 | |
| Incorrectly fitted junction box lid on the 40/50 HP chassis, causing intermittent electrical faults. | 14th Jun 1920 | Box 183 \ M22 img061 | |
| 'singing' noise issue with dynamos and slack bearings. | 28th Jun 1920 | Box 183 \ M22 img062 | |
| Overhaul and engine oil change for chassis 1 EX. | 6th Aug 1920 | Box 183 \ M22 img063 | |
| 300-mile road test report and performance evaluation of a car, including details on speed, tyres, and handling. | 10th Aug 1920 | Box 183 \ M22 img064 | |
| Typed memorandum detailing various car maintenance issues and proposed solutions. | 10th Aug 1920 | Box 183 \ M22 img065 | |
| Test driver's report on the performance of the 1.EX experimental car after a 300-mile run. | 10th Aug 1920 | Box 183 \ M22 img066 | |
| Modifications carried out on car 1.EX and arranging its exchange with car 6.EX at West Wittering. | 31th Aug 1920 | Box 183 \ M22 img067 | |
| From Mr. Royce to C.J. evaluating the performance of the 1.EX experimental car after a 2,000-mile test run. | 26th Sep 1920 | Box 183 \ M22 img068 | |
| Improving ride comfort through tyre selection, suspension adjustments, and axle ratios. | 26th Sep 1920 | Box 183 \ M22 img069 | |
| Performance of a car with a Hawk aero engine and suggestions for improvements. | 26th Sep 1920 | Box 183 \ M22 img070 | |
| Cause of an engine thud due to a loose cylinder block and arranging for new parts to be fitted. | 14th Oct 1930 | Box 183 \ M22 img071 | |
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