| Description | Date | Identifier | |
| List of desired parts to be fitted to a chassis for a 10,000-mile endurance run. | 19th Nov 1919 | Box 181 \ M7 img022 | |
| Letter to Mr Bentley discussing issues and suggestions for the manufacturing process of field coils. | 28th Jan 1920 | Box 181 \ M7 img023 | |
| Condition report on the 2.EX Experimental Chassis, detailing component performance, wear, mileage, and fuel consumption. | 28th Jan 1920 | Box 181 \ M7 img024 | |
| Continued report on a 10,000-mile chassis test, detailing performance, component wear, and fuel consumption. | 28th Jan 1920 | Box 181 \ M7 img025 | |
| Extract from a report on 2.EE, noting issues with Michelin wheels and brake drums, plus weekly mileage and fuel data. | 11th Feb 1920 | Box 181 \ M7 img026 | |
| Extract from a report on vehicle 2.EX detailing mileage, fuel consumption, and a note on piston knock. | 4th Feb 1920 | Box 181 \ M7 img027 | |
| The '2.EX CAR' after a 10,000-mile run in France, proposing a discussion on standardizing parts. | 7th Apr 1920 | Box 181 \ M7 img028 | |
| Standardisation of parts after a 10,000-mile test on the 2.EX car, focusing on the clutch and magneto drive. | 9th Apr 1920 | Box 181 \ M7 img029 | |
| Typed memorandum detailing issues and proposed changes for an air pump, coil, battery, and pistons. | 9th Apr 1920 | Box 181 \ M7 img030 | |
| List of proposed part changes and modifications for an experimental car to be standardized. | 9th Apr 1920 | Box 181 \ M7 img031 | |
| The 10,000-mile test of the 2EX chassis, detailing battery issues and a list of parts intended for standardization. | 9th Apr 1920 | Box 181 \ M7 img032 | |
| Telegram confirmation regarding engine piston rattles and the suggested repairs. | 16th Mar 1920 | Box 181 \ M7 img033 | |
| The performance of experimental cars using Wakefield's Castrol oil, focusing on engine wear, oil consumption, and its advantages. | 8th Jun 1920 | Box 181 \ M7 img034 | |
| On Castrol oil performance in gearboxes and engines, noting its low setting point and carbon formation. | 8th Jun 1920 | Box 181 \ M7 img035 | |
| Extract regarding the failure of a brazed brake bracket and the decision to continue with the process. | 28th Jun 1921 | Box 181 \ M7 img036 | |
| Scheme to fit a 1-inch higher radiator and bonnet to a car. | 1st Mar 1920 | Box 181 \ M7 img037 | |
| Review of the company's compression ignition engine development programme, its costs, and associated risks. | 30th Nov 1931 | Box 181 \ M7 img038 | |
| The status of experimental chassis 7CA and delays to chassis 49GB due to required modifications. | 22th Jun 1915 | Box 181 \ M7 img039 | |
| Status update on various cars including a car for Holmes Bros, a Mercedes Chassis, a Delaunay-Belleville, and a Daimler car. | 27th Nov 1928 | Box 181 \ M7 img040 | |
| Sale of a 'Shop', noting that the Sales department has not yet found a customer. | 27th Nov 1928 | Box 181 \ M7 img041 | |
| The policy for private communications between Derby and Springfield officials. | 30th Nov 1922 | Box 181 \ M7 img042 | |
| The divergence of American practice from the Derby standard on pinning pistons and piston rings. | 28th Nov 1922 | Box 181 \ M7 img043 | |
| Forwarding an instruction regarding communication protocols to avoid friction between the Derby and Springfield locations. | 30th Nov 1922 | Box 181 \ M7 img044 | |
| Engine improvements for cold weather, focusing on the exhaust heated throttle and a new safety feature. | 12th Dec 1924 | Box 181 \ M7 img045 | |
| Proposed American modifications to a chassis, considering them a temporary expedient, and commenting on clutch spigot oiling. | 12th Dec 1924 | Box 181 \ M7 img046 | |
| Note on improving the steady riding of the 20 HP car fitted with balloon tyres. | 1st May 1923 | Box 181 \ M7 img047 | |
| Cover note for horse power charts for the Goshawk and 40/50 chassis. | 1st May 1923 | Box 181 \ M7 img048 | |
| Power losses in different exhaust systems for the standard 40/50 model. | 1st Apr 1924 | Box 181 \ M7 img049 | |
| Graph of Road Wheel B.H.P vs Engine R.P.M. and a table of lap speeds at Brooklands. | 1st Nov 1925 | Box 181 \ M7 img050 | |
| Test results for a 110° Camshaft on 40/50 HP, EAC-1, and 20 HP engines. | 21th Dec 1923 | Box 181 \ M7 img051 | |
| Blueprint detailing dimensions and the nearest hook approach for a gantry or crane. | 21th Dec 1923 | Box 181 \ M7 img052 | |
| Blueprint cover for a document prepared for Messrs Pilkington Bros. | 21th Dec 1923 | Box 181 \ M7 img053 | |
| Blueprint diagram of an overhead hoist, platform, and rail system. | 21th Dec 1923 | Box 181 \ M7 img054 | |
| General arrangement plan view of an air receiver, air compressor cage, and hose reel assembly. | 21th Dec 1923 | Box 181 \ M7 img055 | |
| Blueprint showing the general arrangement and key dimensions of an overhead crane system. | 21th Dec 1923 | Box 181 \ M7 img056 | |
| Blueprint detailing a mechanical assembly with track wheels, runners, and a ball swivel bearing. | 26th Jan 1912 | Box 181 \ M7 img057 | |
| Cover relating to a warehouse extension. | 26th Jan 1912 | Box 181 \ M7 img058 | |
| Blueprint for a No. 2 C, 1 Ton Converted Crane. | 24th Jun 1913 | Box 181 \ M7 img059 | |
| Indicator diagram for the 40/50 engine model. | 24th Jun 1913 | Box 181 \ M7 img060 | |
| Series of three graphs plotting pressure in LBS/sq inch relative to atmosphere against crankshaft degrees. | 20th Dec 1923 | Box 181 \ M7 img061 | |
| Graph plotting crankshaft degrees against piston displacement and relative pressure. | 20th Dec 1923 | Box 181 \ M7 img062 | |
| Graph plotting Revolutions Per Minute against Miles Per Hour. | 28th May 1928 | Box 181 \ M7 img063 | |
| Blueprint chart showing multiple straight lines plotted on a grid. | 28th May 1928 | Box 181 \ M7 img064 | |
| Performance graph showing M.E.P. (Mean Effective Pressure) and Torque values. | 28th May 1928 | Box 181 \ M7 img065 | |
| Graph plotting Horse Power, Torque, and Mean Effective Pressure against engine revolutions per minute under various test conditions. | 28th May 1928 | Box 181 \ M7 img066 | |
| Performance graph showing horsepower curves for a 40/50 Chassis E under various test conditions. | 28th May 1928 | Box 181 \ M7 img067 | |
| Performance graph showing M.E.P. and Torque curves from bench and dynamometer tests. | 28th May 1928 | Box 181 \ M7 img068 | |
| Performance graph for a high-compression engine with different back axle configurations. | 28th May 1928 | Box 181 \ M7 img069 | |
| Performance graph with dual vertical axes for M.E.P. (Mean Effective Pressure) and Torque (Ft Lbs). | 28th May 1928 | Box 181 \ M7 img070 | |
| Graph comparing M.E.P. (Mean Effective Pressure) power curves for the Goshawk II and 40/50 engines from bench and dynamometer tests. | 28th May 1928 | Box 181 \ M7 img071 | |
| Performance graph plotting horsepower for a GII engine against RPM, comparing bench and dynamometer results. | 14th Feb 1923 | Box 181 \ M7 img072 | |
| Test report graph for 6 cars, including the Goshawk, for the month ending Feb 14th, 1923. | 14th Feb 1923 | Box 181 \ M7 img073 | |
| Blueprint graph with data plotted on a grid with a numbered horizontal axis. | 1st May 1923 | Box 181 \ M7 img074 | |
| Performance graph showing Horse Power and M.E.P. curves for a 40/50 engine model with a standard exhaust system. | 1st May 1923 | Box 181 \ M7 img075 | |
| Performance graph for a 40/50 HP engine, plotting Horse Power and M.E.P. (Mean Effective Pressure). | 1st May 1923 | Box 181 \ M7 img076 | |
| Comparing the cooling performance of a Hispano engine with a 40/50 HP engine at different speeds. | 25th Nov 1924 | Box 181 \ M8 img001 | |
| Road-based cooling tests, focusing on fan efficiency, radiator tubes, and matrix improvements for the 40/50 HP model. | 25th Nov 1924 | Box 181 \ M8 img002 | |
| Cooling system investigations, detailing issues with overheating and recommendations for improvements and customer communication. | 10th Dec 1924 | Box 181 \ M8 img003 | |
| Continued note on engine cooling, water loss, radiator tests, and shutter arrangements for a 40/50 HP car. | 28th Nov 1924 | Box 181 \ M8 img004 | |
| Requesting an urgent decision on alterations to car cooling systems to avoid customer complaints of overheating. | 28th Nov 1924 | Box 181 \ M8 img005 | |
| Need for dashboard ventilation due to excessive heat around the driver's feet in Klugard type cars. | 27th Feb 1912 | Box 181 \ M8 img006 | |
| Letter discussing helical timing gears, the plate clutch, and cooling of the floorboards. | 18th Apr 1912 | Box 181 \ M8 img007 | |
| Radiator scheme, flywheel drop forging, and a friction-damped spring coupling. | 18th Apr 1912 | Box 181 \ M8 img008 | |
| Graph of horsepower versus fan speed for a standard 6-blade fan and a modified 3-blade fan. | 20th Nov 1924 | Box 181 \ M8 img009 | |
| Graph of thrust-fan speed curves for seven different fan configurations. | 20th Nov 1924 | Box 181 \ M8 img010 | |
| Bench experiments report on the thrust of various radiator fans at different speeds. | 19th Nov 1924 | Box 181 \ M8 img011 | |
| Letter from Ogilvie & Partners providing recommendations to improve the fan design for a 40-50 HP chassis. | 19th Sep 1924 | Box 181 \ M8 img012 | |
| Technical analysis of increasing fan power with speed, discussing propeller and blade design. | 1st Dec 1919 | Box 181 \ M8 img013 | |
| Pinning of piston rings and a proposed experiment. | 11th Jun 1917 | Box 181 \ M8 img014 | |
| Requesting an experimental run with piston rings featuring a wide gap and altered pinning. | 7th Jun 1917 | Box 181 \ M8 img015 | |
| Request for a complete Remy ignition distributor set for Mr. Royce to examine and discussion on fitting it to aeroplane engines. | 13th Jun 1917 | Box 181 \ M8 img016 | |
| On behalf of Mr. Royce inquiring if multi-ring pistons avoid oiling up in aero engines during a high-altitude nose dive. | 15th Jun 1917 | Box 181 \ M8 img017 | |
| Responding to a report on the 260 HP German Mercedes engine. | 3rd Jun 1917 | Box 181 \ M8 img018 | |
| Requesting the latest performance particulars of engines fitted in various aeroplanes. | 10th Jun 1917 | Box 181 \ M8 img019 | |
| Discussion of two proposed schemes for designing a high-altitude engine to meet an Admiralty specification. | 4th Oct 1917 | Box 181 \ M8 img020 | |
| Description of an engine's pressure control system involving a reservoir, valves, and an aneroid apparatus. | 1st Jun 1917 | Box 181 \ M8 img021 | |
| Engine operation under failure conditions and requesting a test of a regulating device. | 2nd Jun 1917 | Box 181 \ M8 img022 | |
| Description of an engine's automatic pressure control system for starting. | 1st Jun 1917 | Box 181 \ M8 img023 | |
| Fail-safe mechanism where an engine reduces power upon failure of the electrical apparatus or oil pressure. | 1st Jun 1917 | Box 181 \ M8 img024 | |
| Fitting new pistons and rings to Commander Briggs' car, drawing comparisons to aero engine designs. | 4th Jul 1917 | Box 181 \ M8 img025 | |
| Proposed post-war engine modifications, and issues with springing, brakes, and body clearance on a specific vehicle. | 4th Jul 1917 | Box 181 \ M8 img026 | |
| Car alterations to address wheel rubbing and arranging testing with Commander Briggs. | 2nd May 1917 | Box 181 \ M8 img027 | |
| Design changes for the RE Car Engine, specifically regarding pistons, connecting rods, and camshafts. | 2nd May 1917 | Box 181 \ M8 img028 | |
| Requirements for car testing, focusing on springing experiments, under-axle springs, and other components. | 11th May 1917 | Box 181 \ M8 img029 | |
| Design decisions for the RE Car Engine (7 CA), including piston, connecting rod, and camshaft modifications. | 2nd May 1917 | Box 181 \ M8 img030 | |
| Potential modifications to the back axle, induction pipe, and gear ratios to improve road holding and petrol economy. | 11th May 1917 | Box 181 \ M8 img031 | |
| Laboratory report on spring steels and proposing further material tests. | 8th Aug 1917 | Box 181 \ M8 img032 | |
| Dispatch of the 'Falcon' engine for America and its modifications. | 18th Aug 1917 | Box 181 \ M8 img033 | |
| Request to test a new model of magneto for future aero engines, brought in by Commander Bristow. | 28th Aug 1917 | Box 181 \ M8 img034 | |
| Porosity of a 7% copper piston alloy and suggesting tests on its composition. | 4th Sep 1917 | Box 181 \ M8 img035 | |
| Directive from Mr. Royce to arrange for testing engines on coal gas for production work. | 7th Sep 1917 | Box 181 \ M8 img036 | |
| Success of stamped crankshafts over ordinary forged ones and urging increased production from Vickers. | 1st Nov 1917 | Box 181 \ M8 img037 | |
| Letter discussing aero engine gearing, the value of an efficient pilot, and propeller performance limitations at high speeds. | 10th Dec 1917 | Box 181 \ M8 img038 | |
| Letter concerning the 20 HP chassis body weight policy and criticizing archaic bodybuilder practices. | 2nd May 1923 | Box 181 \ M9 img001 | |
| Prioritization of aero engine design and production projects. | 26th Aug 1925 | Box 181 \ M9 img002 | |
| Standardisation sheet about moving the pivot on flip flap type bonnet ventilators. | 14th Jul 1931 | Box 181 \ M9 img003 | |
| The specifications for a proposed harmonic damper, including its polar moment of inertia and natural frequency. | 21th Aug 1931 | Box 181 \ M9 img004 | |
| Calculations for a spring-driven harmonic damper. | 28th Aug 1931 | Box 181 \ M9 img005 | |
| Tests on balanced crankshafts, production schedules, and stock levels for various car models. | 21th Aug 1931 | Box 181 \ M9 img006 | |
| Examination and on-road performance review of a 27 HP Buick 8-cylinder engine. | 4th Sep 1931 | Box 181 \ M9 img007 | |
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