| Description | Date | Identifier | |
| The performance and condition of the ignition governor, fan, crankshaft damper, and flywheel/clutch assemblies. | 26th Feb 1933 | Box 179b \ 3 img378 | |
| The performance of a clutch breather, gearbox, actuating gear, and servo motor mechanism. | 10th May 1924 | Box 179b \ 3 img379 | |
| Report page detailing test results for servo lubrication, transmission shaft, propeller shaft, and radiator performance. | 10th May 1924 | Box 179b \ 3 img380 | |
| The performance and issues of the front axle, brakes, and rear axle. | 10th May 1924 | Box 179b \ 3 img381 | |
| The performance of rear brakes, Rudge Whitworth hubs, and the steering assembly. | 10th May 1924 | Box 179b \ 3 img382 | |
| Report page detailing observations on steering, brakes, water pump, and exhaust system performance. | 10th May 1924 | Box 179b \ 3 img383 | |
| Exhaust silencer boom, vibration, and cracking issues and the subsequent modifications. | 10th May 1924 | Box 179b \ 3 img384 | |
| Inspection report on front and rear road springs and hydraulic dampers. | 10th May 1924 | Box 179b \ 3 img385 | |
| Test report on the performance of dampers, a petrol tank, and an oil level indicator/drain cock. | 10th May 1924 | Box 179b \ 3 img386 | |
| The performance and faults of electrical equipment, including the starter motor, dynamo, and lamps. | 1st Sep 1938 | Box 179b \ 3 img387 | |
| Faults with the stop lamp, battery, and Park Ward bodywork, including paint, doors, roof, and wipers. | 1st Sep 1938 | Box 179b \ 3 img388 | |
| Petrol consumption, oil consumption, and tyre mileage data. | 28th Mar 1933 | Box 179b \ 3 img389 | |
| The investigation of cracks found between the valve seatings on Kestrel cylinder blocks. | 28th Mar 1933 | Box 179b \ 3 img390 | |
| Engine boiling during take-off, resulting in cracked crowns and blocks, and the proposal of a red lamp warning system. | 28th Mar 1933 | Box 179b \ 3 img391 | |
| Test report on a Hawker leading edge double skin condenser for Kestrel aero engines with evaporative cooling. | 28th Mar 1933 | Box 179b \ 3 img392 | |
| Tests conducted on a leading edge condenser. | 28th Mar 1933 | Box 179b \ 3 img393 | |
| Cooling tests for a Hawker double skin wing surface condenser. | 28th Mar 1933 | Box 179b \ 3 img394 | |
| Parameters and results of engine tests. | 29th Mar 1933 | Box 179b \ 3 img395 | |
| Brief summary of development work on the new J.III type hydraulic shock dampers, covering silence, riding comfort, and oil loss. | 29th Mar 1933 | Box 179b \ 3 img396 | |
| The development and testing of dampers and governor control systems for vehicles. | 29th Mar 1933 | Box 179b \ 3 img397 | |
| Test report on the Goshawk blower with the carburetter and chokes removed to analyze changes in air direction and flow. | 31th Mar 1933 | Box 179b \ 3 img398 | |
| Graph showing fuel consumption variation for Kestrel fully supercharged engines when throttling back in level flight. | 27th Feb 1933 | Box 179b \ 3 img399 | |
| Performance comparison graph for a Goshawk Blower 44X with and without carburettors. | 27th Feb 1933 | Box 179b \ 3 img400 | |
| Testing a gear type hotwell pump and a hotwell injector for an evaporatively cooled system. | 1st Apr 1933 | Box 179b \ 4 img001 | |
| Test report on gear-type hotwell pumps and injectors for evaporatively cooled engines. | 1st Apr 1933 | Box 179b \ 4 img002 | |
| Series of tests on an injector's performance with an underslung condenser and varying hotwell positions. | 1st Feb 1933 | Box 179b \ 4 img003 | |
| Graph showing hotwell injector test results, plotting condensate flow against engine RPM. | 29th May 1933 | Box 179b \ 4 img004 | |
| Blueprint of an evaporatively cooled system used for hotwell injector tests. | 1st Apr 1933 | Box 179b \ 4 img005 | |
| Blueprint of a Hotwell Injector used in final tests. | 29th Mar 1933 | Box 179b \ 4 img006 | |
| Figures taken from a worn gear pump tested with Castrol XL oil. | 5th Apr 1933 | Box 179b \ 4 img007 | |
| Gearbox control test results for a 20/25 HP oil pump with various pressures. | 3rd Apr 1933 | Box 179b \ 4 img008 | |
| Graph detailing Gearbox Control Tests for a 20/25 HP oil pump with specific clearances and oil temperature. | 3rd Apr 1933 | Box 179b \ 4 img009 | |
| Graph plotting pump delivery in Pints per Hour against pump speed in RPM. | 10th Apr 1933 | Box 179b \ 4 img010 | |
| Bentley oil temperature tests to evaluate the front timing case as an oil cooler. | 10th Apr 1933 | Box 179b \ 4 img011 | |
| Piston and differential failures on a Bensport car, noting that modifications are necessary. | 11th Jun 1933 | Box 179b \ 4 img012 | |
| Cover memo for a report on a Bentley car after 12,200 miles, detailing criticisms and outstanding issues. | 11th Apr 1933 | Box 179b \ 4 img013 | |
| Bensport car test run from Chateauroux, detailing performance and mechanical failures. | 9th Apr 1933 | Box 179b \ 4 img014 | |
| List of vehicle faults and observations recorded at various mileages, from page 2 of a report. | 9th Apr 1933 | Box 179b \ 4 img015 | |
| Vehicle faults and two sets of acceleration performance figures. | 9th Apr 1933 | Box 179b \ 4 img016 | |
| Braking test results, dynamo output data, and an analysis of Engine Unit C.XIII. | 9th Apr 1933 | Box 179b \ 4 img017 | |
| Engine issues including torque dampers, oil system, and multiple piston failures. | 9th Apr 1933 | Box 179b \ 4 img018 | |
| Inspection report detailing wear, faults, and maintenance on various engine components. | 9th Apr 1933 | Box 179b \ 4 img019 | |
| Issues and observations on various engine components including gears, oil pump, and carburetters. | 9th Apr 1933 | Box 179b \ 4 img020 | |
| The performance and failures of S.U. electrical petrol pumps, the radiator, and the clutch. | 9th Apr 1933 | Box 179b \ 4 img021 | |
| Wear and performance of vehicle components including the gearbox, servo, propeller shaft, rear axle, springing, and brakes. | 9th Apr 1933 | Box 179b \ 4 img022 | |
| Brake performance issues and a loose Rudge Whitworth road wheel. | 9th Apr 1933 | Box 179b \ 4 img023 | |
| The performance of hydraulic dampers, front axle, starter motor, and dynamo. | 9th Apr 1933 | Box 179b \ 4 img024 | |
| The condition and performance of various vehicle components including distributor points, battery, plugs, and tyres. | 11th Apr 1933 | Box 179b \ 4 img025 | |
| Recession valve tests for J.E.II. type shock dampers with a Bellows Governor. | 11th Apr 1933 | Box 179b \ 4 img026 | |
| Deceleration tests performed with a recession valve in the external pressure inlet. | 6th Mar 1933 | Box 179b \ 4 img027 | |
| Deceleration test results for a recession valve under varying governor speeds and conditions. | 11th Apr 1933 | Box 179b \ 4 img028 | |
| Blueprint detailing external pressure 'recession' valve tests for a bakelite disc valve and a ball valve. | 11th Apr 1933 | Box 179b \ 4 img029 | |
| Performance comparison graphs for a J III Rear low pressure engine with different valve setups. | 6th Apr 1933 | Box 179b \ 4 img030 | |
| Performance graphs for a J III Rear low pressure inlet ball valve at various RPMs, with and without release vents. | 6th Apr 1933 | Box 179b \ 4 img031 | |
| Performance graphs showing pressure curves before and after tests for a J III rear low-pressure component at various RPMs. | 6th Apr 1933 | Box 179b \ 4 img032 | |
| Performance graphs for a J III Rear low-pressure system with modifications to the disc and inlet valves. | 12th Apr 1933 | Box 179b \ 4 img033 | |
| Performance and development of hydraulic dampers. | 12th Apr 1933 | Box 179b \ 4 img034 | |
| The development and testing of an evaporative cooling system for the Phantom I Armoured Car. | 12th Apr 1933 | Box 179b \ 4 img035 | |
| Radiator warning lamp and conclusions on the injector system for evaporatively cooled engines in armoured cars. | 12th Apr 1933 | Box 179b \ 4 img036 | |
| Detailed report on a special steam condenser radiator and injector pump system for a Phantom I engine. | 12th Apr 1933 | Box 179b \ 4 img037 | |
| Test report on the performance of a cooling system's pump and injector under dynamometer and road conditions. | 12th Apr 1933 | Box 179b \ 4 img038 | |
| Stop and restart tests, non-return valves, and the advantages of an evaporatively cooled system for armoured cars. | 18th Apr 1933 | Box 179b \ 4 img039 | |
| Sketch of an evaporative-cooled system for the Phantom I. | 18th Apr 1933 | Box 179b \ 4 img040 | |
| Sketch proposing a modification to an injector scheme, showing a venturi section in a suction line. | 13th Apr 1933 | Box 179b \ 4 img041 | |
| Blueprint showing a cross-section of a mechanical assembly with part callouts. | 13th Apr 1933 | Box 179b \ 4 img042 | |
| Blueprint of a Non Return Valve at a scale of 2:1. | 13th Apr 1933 | Box 179b \ 4 img043 | |
| Blueprint showing the profiles of mechanical components. | 13th Apr 1933 | Box 179b \ 4 img044 | |
| Cover sheet for a set of documents with reference number R.R.SCH:375. | 13th Apr 1933 | Box 179b \ 4 img045 | |
| Blueprint showing the layout of a nozzle and rubber connector relative to a vehicle frame. | 13th Apr 1933 | Box 179b \ 4 img046 | |
| Blueprint drawing of a component labelled 'Sweat'. | 13th Apr 1933 | Box 179b \ 4 img047 | |
| Blueprint showing a side view of a mechanical assembly with various part call-outs. | 13th Apr 1933 | Box 179b \ 4 img048 | |
| Blueprint of an evaporatively cooled armoured car chassis. | 13th Apr 1933 | Box 179b \ 4 img049 | |
| Blueprint of a mechanical valve and pipe assembly. | 13th Apr 1933 | Box 179b \ 4 img050 | |
| Diagrammatic view of a piping system at half scale. | 13th Apr 1933 | Box 179b \ 4 img051 | |
| Blueprint of a mechanical pipe section with a nozzle and elbow bend. | 13th Apr 1933 | Box 179b \ 4 img052 | |
| Blueprint detailing a hydraulic ejector system, likely for armaments. | 13th Apr 1933 | Box 179b \ 4 img053 | |
| Partial blueprint showing a cross-section of a mechanical assembly. | 13th Apr 1933 | Box 179b \ 4 img054 | |
| Partial blueprint showing sections of mechanical components. | 13th Apr 1933 | Box 179b \ 4 img055 | |
| Blueprint showing the assembly of a bolted pipe or tube connection. | 5th Apr 1933 | Box 179b \ 4 img056 | |
| Blueprint drawing of a mechanical component at full scale. | 5th Apr 1933 | Box 179b \ 4 img057 | |
| Cover memo for a report on a Bentley car's performance after 12,000 miles, referencing a list of criticisms. | 13th Apr 1935 | Box 179b \ 4 img058 | |
| Corrective actions for various vehicle troubles reported at 12,196 miles. | 12th Apr 1933 | Box 179b \ 4 img059 | |
| List of numbered responses to technical issues regarding engine, brake, and chassis components. | 13th Apr 1933 | Box 179b \ 4 img060 | |
| The failure of the Bunsport Car's axle and proposed modifications. | 13th Apr 1933 | Box 179b \ 4 img061 | |
| Tests of a gravity-operated suction pipe designed to supply oil to an engine during inverted flight. | 13th Apr 1933 | Box 179b \ 4 img062 | |
| Conclusions on the performance of a gravity-operated suction pipe and oil tank during engine inversion. | 13th Apr 1933 | Box 179b \ 4 img063 | |
| Short memo regarding Gearbox Control in response to a previous reference. | 20th Apr 1933 | Box 179b \ 4 img064 | |
| Graph showing gearbox control test results, plotting pump speed against delivery rate at various temperatures and pressures. | 12th Apr 1935 | Box 179b \ 4 img065 | |
| Graphs showing oil pump delivery pressure versus RPM at different temperatures and pressures. | 12th Apr 1935 | Box 179b \ 4 img066 | |
| Visit discussing modifications to the Condor C.I. engine and testing of a Cordite starter. | 20th Apr 1933 | Box 179b \ 4 img067 | |
| C.I. engine experiments, opposed cylinder engines, and a proposed four-stroke bulb engine from Ricardo. | 20th Apr 1933 | Box 179b \ 4 img068 | |
| Napier sleeve valve engine performance results and future development plans. | 20th Apr 1933 | Box 179b \ 4 img069 | |
| Engine tests on side injection pistons and a combined pump and injector. | 20th Apr 1933 | Box 179b \ 4 img070 | |
| Special tests following a failed Civil Type Test on an Exp.3 engine with two-piece detachable head cylinder blocks. | 20th Apr 1933 | Box 179b \ 4 img071 | |
| Maximum indicated pressure tests to investigate engine detonation and ramming action in induction pipes. | 20th Apr 1933 | Box 179b \ 4 img072 | |
| Issue with steering wheel clearance and potential modifications to the column or coachwork. | 21th Apr 1933 | Box 179b \ 4 img073 | |
| List of faults and required alterations discovered when mounting a second Bentley Body. | 24th Apr 1933 | Box 179b \ 4 img074 | |
| List of findings and required modifications for various vehicle components, including wings, scuttles, and wheels. | 24th Apr 1933 | Box 179b \ 4 img075 | |
| Production strategy, cost, and sales plan for the 'GOSHAWK II' engine. | 1st Jul 1921 | Box 180 \ M1 \ 1 img001 | |
| Dynamometer power test results for the Goshawk 11 engine, including general running observations. | 1st Aug 1921 | Box 180 \ M1 \ 1 img002 | |
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