| Description | Date | Identifier | |
| Blueprint graph showing engine power output and performance characteristics against RPM. | 4th Dec 1931 | Box 179 \ 2 img061 | |
| Why Delco hydraulic shock dampers operate without a filter. | 4th Dec 1931 | Box 179 \ 2 img062 | |
| Suggestion to redesign the battery ignition distributor head using moulded bakelite components. | 14th Dec 1931 | Box 179 \ 2 img063 | |
| Technical memorandum detailing three issues with the 25 HP Synchromesh gearbox. | 15th Dec 1931 | Box 179 \ 2 img064 | |
| Gearbox performance, detailing issues with gear noise, 3rd gear engagement, and top gear disengagement. | 15th Dec 1931 | Box 179 \ 2 img065 | |
| Issues with the battery ignition lever flinging and bouncing at high engine speeds, with reference to a Lucas redesign. | 16th Dec 1931 | Box 179 \ 2 img066 | |
| Preliminary calculations for a 4 1/4 inch diameter J.3. starter motor (Semience). | 17th Dec 1931 | Box 179 \ 2 img067 | |
| 100-hour engine test report on leaded Anglo Persian Spirit fuel to observe its effects on engine condition. | 18th Dec 1931 | Box 179 \ 2 img068 | |
| Performance comparison between Anglo Persian fuel and D.T.D.134 fuel, covering detonation, power, and consumption. | 18th Dec 1931 | Box 179 \ 2 img069 | |
| Comparative power curves at constant speed and varying boost for a Kestrel supercharged engine. | 14th Dec 1931 | Box 179 \ 2 img070 | |
| Comparative power curves at constant speed and varying boost for Kestrel supercharged engines. | 11th Jan 1931 | Box 179 \ 2 img071 | |
| Comparative power curves for a Kestrel K II-27 supercharged engine at rated boost, comparing two different fuels. | 14th Oct 1931 | Box 179 \ 2 img072 | |
| Graph showing a consumption loop at rated boost for a Kestrel supercharged engine. | 14th Dec 1931 | Box 179 \ 2 img073 | |
| The gear and brake lever positions on a 20.G.IV chassis. | 18th Dec 1931 | Box 179 \ 2 img074 | |
| The condition of an 18-GIV engine unit after a 10,000-mile test. | 21th Dec 1931 | Box 179 \ 2 img075 | |
| The condition and performance of various chassis components. | 19th Apr 1931 | Box 179 \ 2 img076 | |
| Inspection report detailing the condition of the rear axle, propeller shaft, pedals, and gearbox. | 1st Dec 1931 | Box 179 \ 2 img077 | |
| Table of measurements for cylinder bore diameter and wear after 16,000 miles. | 17th Dec 1931 | Box 179 \ 2 img078 | |
| Photograph showing sets of engine bearing shells arranged in two rows for inspection. | 22th Dec 1931 | Box 179 \ 2 img079 | |
| Proposed modifications to improve the performance of the Continental Phantom II. | 22th Dec 1931 | Box 179 \ 2 img080 | |
| List of proposed modifications to retain reliability and develop a fast Continental sports car. | 24th Jan 1931 | Box 179 \ 2 img081 | |
| The development and testing of R.R. Twin, Two Single, and Single carburetters. | 24th Jan 1931 | Box 179 \ 2 img082 | |
| Carburetter development options and timelines for the improved Phantom II Continental car. | 22th Dec 1931 | Box 179 \ 2 img083 | |
| Potential improvements to the power output of the 25 HP engine unit fitted to 20-G-4. | 22th Dec 1931 | Box 179 \ 2 img084 | |
| Analysis of vehicle performance increases from various modifications, comparing against previous results at Brooklands. | 22th Dec 1931 | Box 179 \ 2 img085 | |
| Performance graph comparing standard, 50% larger, and 100% larger chokes on a China CIS unit. | 22th Dec 1931 | Box 179 \ 2 img086 | |
| Comparing the performance of silent gearboxes from several competitor cars. | 22th Dec 1931 | Box 179 \ 2 img087 | |
| Noise improvements and experiments for the 25 HP Synchromesh Gearbox. | 23th Dec 1931 | Box 179 \ 2 img088 | |
| Difficulty with brake ropes fouling the cross member on diamond engine mounted cars. | 30th Dec 1931 | Box 179 \ 2 img089 | |
| Fouling of brake ropes on a cross member in a 25 HP vehicle. | 13th Mar 1931 | Box 179 \ 2 img090 | |
| Tests and proposed improvements for internal support for side spare wheel carriers. | 13th Mar 1931 | Box 179 \ 2 img091 | |
| Deflection tests for a bumper chassis, detailing reductions in frame movement and the importance of a rigid dash attachment. | 30th Dec 1931 | Box 179 \ 2 img092 | |
| Blueprint of a test apparatus for a 25 HP side spare wheel bracket. | 30th Dec 1931 | Box 179 \ 2 img093 | |
| Blueprint diagram illustrating the clutch pedal assembly and linkage. | 30th Dec 1931 | Box 179 \ 2 img094 | |
| Oil consumption issues in Kestrel engines related to cylinder liner construction and distortion. | 30th Dec 1931 | Box 179 \ 2 img095 | |
| Blueprint diagram comparing two arrangements of cylinder liners for a Kestrel engine. | 30th Dec 1931 | Box 179 \ 2 img096 | |
| Calculations on the Peregrine crankshaft's critical speed and inertia using Carter's formula. | 30th Dec 1931 | Box 179 \ 2 img097 | |
| Detonation tests carried out on detachable head cylinders for the Kestrel engine. | 31th Dec 1931 | Box 179 \ 2 img098 | |
| Engine strip-down, detailing component damage and proposing further comparative testing. | 31th Dec 1931 | Box 179 \ 2 img099 | |
| Photograph of an engine cylinder head showing the combustion chambers and valve ports. | 31th Dec 1931 | Box 179 \ 2 img100 | |
| Close-up photograph of an engine cylinder head, showing the combustion chambers and valve guides. | 31th Dec 1931 | Box 179 \ 2 img101 | |
| Close-up photograph of an engine cylinder block's top deck. | 31th Dec 1931 | Box 179 \ 2 img102 | |
| Photograph showing a close-up view of an engine cylinder head. | 31th Dec 1931 | Box 179 \ 2 img103 | |
| Type test report on the Sleeve Valve Kestrel engine, detailing endurance tests and modifications. | 31th Dec 1931 | Box 179 \ 2 img104 | |
| Endurance test report detailing fuel, timing settings, component failures, and performance metrics. | 31th Dec 1931 | Box 179 \ 2 img105 | |
| Engine condition following an endurance test, detailing issues with gears, leakage, and plugs. | 31th Dec 1931 | Box 179 \ 2 img106 | |
| Engine test failure, detailing power observations and the subsequent examination of seized and damaged components. | 11th Dec 1931 | Box 179 \ 2 img107 | |
| Analysis of gear lubricant, spark plug performance, and a potential engine failure due to pre-ignition. | 31th Dec 1931 | Box 179 \ 2 img108 | |
| Photograph of a flanged and threaded machined component. | 31th Dec 1931 | Box 179 \ 2 img109 | |
| Photograph of a damaged piston and connecting rod assembly with fragments. | 2nd Jan 1932 | Box 179 \ 2 img110 | |
| The rapid wear of distributor contact points due to excessive cooling of the ballast resistance. | 2nd Jan 1932 | Box 179 \ 2 img111 | |
| Test report on improving gear rattles in the Phantom II Spring Drive through adjustments to ignition, compression, and spring loading. | 2nd Jan 1932 | Box 179 \ 2 img112 | |
| Gear rattle, spring driving load, and frictional load settings. | 2nd Jan 1932 | Box 179 \ 2 img113 | |
| Successful test of a 25 HP synchromesh reverse gear. | 2nd Jan 1932 | Box 179 \ 2 img114 | |
| Cover note attaching a licence for 20.G.IV. | 2nd Jan 1932 | Box 179 \ 2 img115 | |
| Comparative costs and design of a cast iron ribbed drum versus a pressed steel drum. | 1st Jan 1932 | Box 179 \ 2 img116 | |
| 25 HP engine clutch slipping issues, comparing spring loads with the 40/50 model and detailing proposed modifications. | 5th Jan 1932 | Box 179 \ 2 img117 | |
| Blueprint comparing standard and modified clutch leverage for a 25 HP engine. | 1st Jan 1932 | Box 179 \ 2 img118 | |
| Test report on a modified intermediate gear bush for a Kestrel engine supercharger due to issues with the white metal lining. | 30th Apr 1935 | Box 179 \ 2 img119 | |
| Further running tests on bushes in a development engine. | 1st Mar 1938 | Box 179 \ 2 img120 | |
| Sketch showing the position and oil feed to the 'Kestrel' supercharger intermediate gear bushes. | 6th Jan 1932 | Box 179 \ 2 img121 | |
| Test report on a Kestrel-IIS-325 engine before dispatch for flight tests. | 5th Jan 1932 | Box 179 \ 2 img122 | |
| Power curves for Kestrel IIS-325 supercharged engine flight tests at Tollerton. | 4th Jan 1932 | Box 179 \ 2 img123 | |
| Resolving fuel/air distribution issues in supercharged Kestrel engines at high altitudes and low temperatures. | 5th Jan 1932 | Box 179 \ 2 img124 | |
| Flight test report on engine performance with heated air intakes at various altitudes and temperatures. | 5th Jan 1932 | Box 179 \ 2 img125 | |
| Note on figures obtained for water temperature during a climb with heated intakes. | 5th Jan 1932 | Box 179 \ 2 img126 | |
| Graph showing test results for water-heated air intakes on a Fairey 3.F with a modified supercharged Kestrel engine during a climb. | 5th Jan 1932 | Box 179 \ 2 img127 | |
| Blueprint for water-heated air intakes for the Kestrel supercharged engine. | 6th Jan 1932 | Box 179 \ 2 img128 | |
| Fuel consumption tests for a fully supercharged 'Kestrel' engine throttled to, and below, the rated boost. | 6th Jan 1932 | Box 179 \ 2 img129 | |
| Graph of Brake Horse Power against Specific Fuel Consumption for Kestrel Supercharged Engines. | 30th Oct 1931 | Box 179 \ 2 img130 | |
| Performance graph showing the consumption loop for a Kestrel Supercharged Engine. | 30th Oct 1931 | Box 179 \ 2 img131 | |
| Induction pipe tests for Kestrel supercharged engines to improve distribution. | 6th Jan 1932 | Box 179 \ 2 img132 | |
| Summary report on tests conducted on standard induction pipe E.3229, concluding that no changes are justified. | 6th Jan 1932 | Box 179 \ 2 img133 | |
| Graph of consumption loops at 2250 RPM versus brake horse power for a Kestrel modified supercharged engine. | 10th Dec 1931 | Box 179 \ 2 img134 | |
| Performance graph showing consumption loops for Kestrel Mod Supercharged engines at 2250 RPM. | 1st Oct 1929 | Box 179 \ 2 img135 | |
| Performance graph showing consumption loops for Kestrel modified supercharged engines at 2250 RPM. | 11th Jan 1931 | Box 179 \ 2 img136 | |
| Graph of fuel consumption loops for a Kestrel modified supercharged engine at 2250 RPM. | 12th Dec 1931 | Box 179 \ 2 img137 | |
| Performance of a P.2 gearbox with an epicyclic third gear. | 8th Jan 1932 | Box 179 \ 2 img138 | |
| The progress of quieting a 25 HP Synchro-Mesh gearbox and standardizing its design. | 8th Jan 1932 | Box 179 \ 2 img139 | |
| Development and road testing of a modified throttle-edge carburettor for a 25 HP car. | 8th Jan 1932 | Box 179 \ 2 img140 | |
| Proposal to change the 40/50 chassis batteries to a more cost-effective and internationally standard type from the Exide Co. | 1st Aug 1932 | Box 179 \ 2 img141 | |
| Comparing a Bosch starter motor's 'teazer' circuit with other systems, including those on Alfa Romeo and Bentley vehicles. | 1st Jan 1932 | Box 179 \ 2 img142 | |
| Engine strip-down report for model 18.G.IV after a 10,000-mile test. | 8th Jan 1932 | Box 179 \ 2 img143 | |
| The condition of various vehicle components after testing, including springs, clutch, gearbox, and radiator. | 8th Jan 1932 | Box 179 \ 2 img144 | |
| Vehicle inspection report detailing the condition of pedals, tank, axles, and shock absorbers. | 8th Jan 1932 | Box 179 \ 2 img145 | |
| Photograph of a piston crown showing its surface condition. | 8th Jan 1932 | Box 179 \ 2 img146 | |
| Photograph displaying main and big end bearing shells for a 20 HP Chassis. | 9th Jan 1932 | Box 179 \ 2 img147 | |
| Visit to Martlesham discussing high altitude carburation issues on supercharged engines. | 9th Jan 1932 | Box 179 \ 2 img148 | |
| Testing a water-heated honeycomb radiator system for the 'Fury' aircraft to resolve high-altitude performance issues. | 9th Jan 1932 | Box 179 \ 2 img149 | |
| The condition of various experimental electrical units after a 10,000-mile test. | 1st Jan 1932 | Box 179 \ 2 img150 | |
| Description of the R.R. Automatic Boost Regulator and its operation. | 11th Jan 1932 | Box 179 \ 2 img151 | |
| Technical description of the operation of a boost control system for an engine. | 11th Jan 1932 | Box 179 \ 2 img152 | |
| Continued description of the relay piston and throttles' operation at increasing altitudes. | 5th Jan 1932 | Box 179 \ 2 img153 | |
| Diagrammatic sketch of a boost regulator, showing the relay piston and pilot's controls in the take-off position. | 11th Jan 1982 | Box 179 \ 2 img154 | |
| Diagrammatic sketch of the boost regulator, showing a section and pressure passages from the supercharger. | 11th Jan 1932 | Box 179 \ 2 img155 | |
| New Smith instrument board for the 20/25 HP chassis, including cost comparisons. | 2nd Jan 1932 | Box 179 \ 2 img156 | |
| Cost savings on instrument boards by using sheet metal stampings instead of aluminium castings. | 2nd Jan 1932 | Box 179 \ 2 img157 | |
| Experiments conducted on a 4-litre Bentley regarding crankshaft torsional periods. | 12th Jan 1932 | Box 179 \ 2 img158 | |
| Springing for the 24/25 HP car, recommending against higher rating springs in favor of the standard low rating springs. | 16th Jan 1932 | Box 179 \ 2 img159 | |
| Improvements and solutions for 25 HP synchro gearbox difficulties. | 18th Jan 1932 | Box 179 \ 2 img160 | |
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