| Description | Date | Identifier | |
| Bench tests conducted on a Scintilla shunt-wound dynamo and regulator. | 9th Jan 1932 | Box 179 \ 2 img161 | |
| Performance analysis and comparison of Scintilla and Bosch dynamo regulators against a standard 20/25 machine. | 9th Jan 1932 | Box 179 \ 2 img162 | |
| Graph of Dynamo Output Curves under night-running conditions at 80°C. | 16th Jul 1932 | Box 179 \ 2 img163 | |
| The wear of brake linings in a P.2 gearbox with an epicyclic third gear. | 19th Jan 1932 | Box 179 \ 2 img164 | |
| Performance improvements and power loss analysis for a compression ignition engine. | 20th Jan 1932 | Box 179 \ 2 img165 | |
| Engine performance improvements related to volumetric efficiency and fuel injection systems. | 20th Jan 1932 | Box 179 \ 2 img166 | |
| Technical memorandum discussing empirical data and design requirements for Phantom II and 25 HP valve springs. | 21th Jan 1932 | Box 179 \ 2 img167 | |
| Difficulties of jacking cars and evaluating two permanently fitted four-wheel jacking systems. | 21th Jan 1932 | Box 179 \ 2 img168 | |
| Operation and numerous disadvantages of a vehicle jacking system. | 31th Jan 1932 | Box 179 \ 2 img169 | |
| The D.W.S. mechanical jacking system and its fitment. | 21th Jan 1932 | Box 179 \ 2 img170 | |
| Comparison of 'Jackall' and 'D.W.S.' jacking systems, including weight, clearance, and cost. | 1st Jan 1942 | Box 179 \ 2 img171 | |
| Blueprint illustrating the components and operation of the D.W.S. four-wheel jacking system. | 22th Jan 1932 | Box 179 \ 2 img172 | |
| Comparative test report on various sports cars, with performance data for the Alfa Romeo engine. | 21th Jan 1932 | Box 179 \ 2 img173 | |
| Report comparing the performance of a supercharged Lagonda, the 16-34 model, the Phantom II, and American cars. | 21th Jan 1932 | Box 179 \ 2 img174 | |
| Crankshaft period issues, comparing a car's performance to a Bentley's and detailing ongoing tests. | 21th Jan 1932 | Box 179 \ 2 img175 | |
| Weights for the 20.G.IV model, broken down into complete, body only, and chassis. | 22th Jan 1932 | Box 179 \ 2 img176 | |
| Road test results for a Continental 25 HP car comparing performance with different engine configurations and components. | 22th Jan 1932 | Box 179 \ 2 img177 | |
| The internal condition of a 25 HP engine and the adaptation of a J.1 head for a Continental 25 HP car. | 22th Jan 1932 | Box 179 \ 2 img178 | |
| Comparison graph of proposed Continental 25 HP engine power curves with an open exhaust. | 1st Jan 1932 | Box 179 \ 2 img179 | |
| Experiments to improve mixture distribution in a supercharged Kestrel engine at high altitudes. | 1st Jan 1932 | Box 179 \ 2 img180 | |
| The design and testing of an 'introverter' deflector for improving induction mixture spray. | 22th Jan 1932 | Box 179 \ 2 img181 | |
| Experiments on a device to vary liquid discharge and distribution, with a note on suction in the induction pipe. | 22th Jan 1932 | Box 179 \ 2 img182 | |
| Blueprint showing various designs for Kestrel mixture re-distributors. | 22th Jan 1932 | Box 179 \ 2 img183 | |
| The deletion of the magneto from the 20/25 chassis. | 1st Jan 1932 | Box 179 \ 2 img184 | |
| Performance issues and subsequent modifications for the Phantom II Petrol Pump, model LEC 2951. | 25th Jan 1932 | Box 179 \ 2 img185 | |
| Continuation of a report discussing the curve of deliveries at various RPMs. | 26th Jan 1932 | Box 179 \ 2 img186 | |
| Performance graph for a Phantom II petrol pump, plotting delivery rate against pump speed for a test bed engine. | 15th Jan 1932 | Box 179 \ 2 img187 | |
| The rehearsal of a French type test, including rating and backfire tests, for the Kestrel III S. Exp.11 engine. | 27th Jan 1932 | Box 179 \ 2 img188 | |
| Engine safety tests, including performance data, backfiring issues, and cylinder testing. | 27th Jan 1932 | Box 179 \ 2 img189 | |
| Test report detailing engine backfire tests, consumption loops, and performance analysis. | 27th Jan 1932 | Box 179 \ 2 img190 | |
| Procedure for determining torque, power, and consumption curves at full throttle. | 27th Jan 1932 | Box 179 \ 2 img191 | |
| Procedure for conducting a safety test on an engine, focusing on provoking and observing backfires. | 16th Jan 1932 | Box 179 \ 2 img192 | |
| Blueprint graph showing comparative power curves for a Kestrel supercharged engine during French type test rating tests. | 16th Jan 1932 | Box 179 \ 2 img193 | |
| Formulas for temperature and pressure corrections on engine power. | 7th Jan 1932 | Box 179 \ 2 img194 | |
| Page of calculations for determining engine power using several variables and formulas. | 25th Jan 1932 | Box 179 \ 2 img195 | |
| Performance graph showing comparative consumption loops for Kestrel supercharged engines at 2500 R.P.M. | 25th Jan 1932 | Box 179 \ 2 img196 | |
| Performance graph showing comparative consumption loops for a Kestrel supercharged engine. | 4th May 1932 | Box 179 \ 2 img197 | |
| Short memo confirming a test is underway for the R.R. Single Expanding Carburetter. | 29th Jan 1932 | Box 179 \ 2 img198 | |
| 12-cylinder engines and new features in U.S. competitor cars. | 30th Jan 1932 | Box 179 \ 2 img199 | |
| Comparative table of specifications for 12-cylinder engines from various car manufacturers. | 1st Feb 1932 | Box 179 \ 2 img200 | |
| Examination report on the big end split pinning of three Kestrel IB engines. | 1st Feb 1932 | Box 179 \ 2 img201 | |
| Continued report on the examination of wear on split pins in IB and II a engines. | 1st Feb 1932 | Box 179 \ 2 img202 | |
| Tests conducted to reproduce big end split pin failures in Kestrel engines. | 2nd Feb 1932 | Box 179 \ 2 img203 | |
| Inspection report detailing the condition of various fork and blade end pins after a test. | 1st Feb 1932 | Box 179 \ 2 img204 | |
| Sourcing Stalloy iron strips for experimental ignition coil cores and discussing alternative designs. | 4th Feb 1932 | Box 179 \ 2 img205 | |
| Visits to Gleason Works and Pierce Arrow in the U.S.A., detailing observations on gear manufacturing and vehicle development. | 4th Feb 1932 | Box 179 \ 2 img206 | |
| Report page discussing vehicle suspension, brakes, engine smoothness, and details of a competitor's crankshaft damper. | 4th Feb 1932 | Box 179 \ 2 img207 | |
| Analysis of a Pierce-Arrow hot spot manifold, an A.C. intake silencer, and rubber engine mountings. | 4th Feb 1932 | Box 179 \ 2 img208 | |
| Blueprint of a Pierce Arrow engine mounting and notes on an exhaust silencer. | 4th Feb 1932 | Box 179 \ 2 img209 | |
| Technical report discussing improvements and observations on steering, suspension, engine, and transmission components. | 4th Feb 1932 | Box 179 \ 2 img210 | |
| Diagram showing a self-adjusting tappet and a crankshaft damper. | 4th Feb 1932 | Box 179 \ 2 img211 | |
| Pros and cons of sheet metal versus moulded battery lids. | 2nd Feb 1932 | Box 179 \ 2 img212 | |
| Optimal air gap size in a jump spark battery ignition distributor. | 1st Feb 1932 | Box 179 \ 2 img213 | |
| Proposal for chassis wiring to protect batteries against over-discharge using a master switch system. | 2nd Feb 1932 | Box 179 \ 2 img214 | |
| Continued note on using a diaphragm to protect the starter motor circuit and chassis wiring. | 1st Feb 1932 | Box 179 \ 2 img215 | |
| Analysis of 12-cylinder engine crankshafts, vee angles, and torsional vibrations for a 6250cc engine. | 9th Feb 1932 | Box 179 \ 2 img216 | |
| Comparative study of bearing and balance weight arrangements for a 12 cylinder engine. | 9th Feb 1932 | Box 179 \ 2 img217 | |
| Data table for a 12-cylinder engine, analyzing properties at 30° and 45° angles. | 9th Feb 1932 | Box 179 \ 2 img218 | |
| Technical table of coefficients for calculating torsional vibrations in V-engines with 60, 65, 80, and 90 degree bank angles. | 10th Feb 1932 | Box 179 \ 2 img219 | |
| Visit to R.A.E. Farnborough to inspect a faulty boost regulator, detailing the causes and proposed modifications. | 10th Feb 1932 | Box 179 \ 2 img220 | |
| On modifications to boost regulators and the development of automatic altitude mixture control units for aircraft engines. | 26th Oct 1932 | Box 179 \ 2 img221 | |
| The performance of Vee carburetters on Kestrel engines and related flight tests. | 14th Oct 1932 | Box 179 \ 2 img222 | |
| The effect of individual magneto timing on engine detonation. | 10th Feb 1932 | Box 179 \ 2 img223 | |
| Recommendations on magneto settings and wiring schemes to manage engine detonation. | 10th Apr 1932 | Box 179 \ 2 img224 | |
| Test report on an Alfa-Romeo engine. | 10th Feb 1932 | Box 179 \ 2 img225 | |
| Engine test report discussing ignition, spark plugs, running speed, vibrations, and camshafts. | 10th Feb 1932 | Box 179 \ 2 img226 | |
| Report page detailing engine test results, including valve timings, oil pressure, and component accessibility. | 10th Feb 1932 | Box 179 \ 2 img227 | |
| Power and consumption curve and valve timing diagram for an Alfa-Romeo unit with exhaust manifold only. | 4th Dec 1925 | Box 179 \ 2 img228 | |
| Graph of an Alfa-Romeo engine's boost pressure and temperature against RPM. | 4th Dec 1925 | Box 179 \ 2 img229 | |
| Graph showing compression pressures against RPM for an Alfa-Romeo unit with a 5.35:1 compression ratio. | 4th Dec 1925 | Box 179 \ 2 img230 | |
| Graph plotting the mechanical efficiency of an Alfa-Romeo unit against its RPM. | 4th Dec 1925 | Box 179 \ 2 img231 | |
| Exhaust valve lift diagram for an Alfa-Romeo unit. | 4th Dec 1925 | Box 179 \ 2 img232 | |
| Graph plotting valve lift against the engine crank angle. | 4th Dec 1925 | Box 179 \ 2 img233 | |
| Graph plotting a curve related to engine timing, showing a closing point and Top Dead Center (TDC). | 8th Feb 1929 | Box 179 \ 2 img234 | |
| Blueprint graph illustrating valve timing profiles relative to crankshaft angle around Top Dead Center (TDC). | 8th Feb 1929 | Box 179 \ 2 img235 | |
| Graph illustrating the inlet valve lift for an Alfa-Romeo unit. | 8th Feb 1929 | Box 179 \ 2 img236 | |
| Blueprint graph showing a 'closing' curve. | 8th Feb 1929 | Box 179 \ 2 img237 | |
| Graph showing valve lift against crank angle for inlet and exhaust valves around top dead centre. | 8th Feb 1929 | Box 179 \ 2 img238 | |
| Graph plotting a curve with an x-axis labelled B.D.C. and numerical increments. | 12th Feb 1932 | Box 179 \ 2 img239 | |
| Preliminary test results and modifications for the Phantom II Expanding Carburetter. | 12th Feb 1932 | Box 179 \ 2 img240 | |
| Carburettor performance issues, identified faults, and ongoing development work. | 22th Aug 1932 | Box 179 \ 2 img241 | |
| Performance comparison graph between a 2.500 Bore Single SU carburettor and an RR Updraught Expanding carburettor. | 22th Aug 1932 | Box 179 \ 2 img242 | |
| Comparison of the merits of an epicyclic third gearbox versus a synchro-mesh gearbox. | 11th Feb 1932 | Box 179 \ 2 img243 | |
| Progress update on synchro-mesh and experimental epicyclic gearboxes for the 25 HP and Phantom II models. | 11th Feb 1932 | Box 179 \ 2 img244 | |
| Tests of a new full-length taper bush for the reverse gear of a 25HP Synchromesh Gear Box. | 12th Feb 1932 | Box 179 \ 2 img245 | |
| Confirming experiments on the Japan 3 Dynamo, specifically for an improved 3rd brush machine. | 12th Feb 1932 | Box 179 \ 2 img246 | |
| Report comparing a synchromesh gearbox to one with an epicyclic third gear. | 12th Feb 1932 | Box 179 \ 2 img247 | |
| Experiments to cure overrun gear rattles on a 25HP model by fitting a friction damper. | 2nd Feb 1932 | Box 179 \ 2 img248 | |
| Conference at the Air Ministry discussing the feasibility of battery ignition on aero engines. | 8th Mar 1932 | Box 179 \ 2 img249 | |
| Conference memo discussing magneto versus battery ignition for aero engines, including design compromises and competitor progress. | 1st Feb 1932 | Box 179 \ 2 img250 | |
| The necessity and design considerations for radio screened sparking plugs in aero engines. | 15th Feb 1932 | Box 179 \ 2 img251 | |
| Cooperating with plug manufacturers to create a new design outside of standardisation considerations. | 15th Feb 1932 | Box 179 \ 2 img252 | |
| Test report comparing the durability of standard versus two-piece cylinder block top joints on a 'Kestrel' engine under detonation conditions. | 16th Feb 1932 | Box 179 \ 2 img253 | |
| Engine tests comparing standard and two-piece cylinder blocks, with analysis of detonation and overheating effects. | 16th Feb 1932 | Box 179 \ 2 img254 | |
| Drawing of two rings. | 16th Feb 1932 | Box 179 \ 2 img255 | |
| Drawing of a circular component, possibly a ring or washer. | 16th Feb 1932 | Box 179 \ 2 img256 | |
| Drawing of two rings. | 17th Feb 1932 | Box 179 \ 2 img257 | |
| Notification that an engine unit is now running on the test bed. | 17th Feb 1932 | Box 179 \ 2 img258 | |
| Comparing the durability of steel versus aluminium wings during 10,000-mile road tests. | 18th Feb 1932 | Box 179 \ 2 img259 | |
| Test report on a reduction gear spring drive for a Kestrel engine. | 18th Feb 1932 | Box 179 \ 2 img260 | |
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