| Description | Date | Identifier | |
| Modifications to the J.3. exhaust swan neck pipe routing. | 12th Sep 1931 | Box 179 \ 1 img160 | |
| Requesting a report on schemes for steadying side wheel carriers on P.2 and 25HP models. | 10th Dec 1931 | Box 179 \ 1 img161 | |
| The positioning of the brake equaliser crossmember and its effect on passenger footwell space. | 10th Dec 1931 | Box 179 \ 1 img162 | |
| Possibility of dispensing with a filter in Delco hydraulic shock dampers. | 11th Dec 1931 | Box 179 \ 1 img163 | |
| Enquiry about front shock dampers located outside the frame. | 11th Dec 1931 | Box 179 \ 1 img164 | |
| Design and implications of a longer bonnet for the P2 model. | 12th Dec 1931 | Box 179 \ 1 img165 | |
| Requesting arrangements for a Special Touring Saloon car (20.G.4) to be photographed in London. | 18th Dec 1931 | Box 179 \ 1 img166 | |
| The change gear lever and speedometer drive, requesting an investigation into its lubrication. | 31th Dec 1931 | Box 179 \ 1 img167 | |
| The lengthening of the gear lever and repositioning of the brake lever for the P.2 synchromesh gearbox. | 14th Dec 1931 | Box 179 \ 1 img168 | |
| From R. to Mr. H.S. discussing the qualities and issues of competitor vehicles, specifically Alfa Romeo and Lagonda. | 15th Dec 1931 | Box 179 \ 1 img169 | |
| Design of the radiator, bonnet, and dash for car model J.3. | 17th Dec 1931 | Box 179 \ 1 img170 | |
| Report regarding schemes for stiffening a side spare wheel carrier on a 25HP car. | 1st Dec 1931 | Box 179 \ 1 img171 | |
| Test ride report detailing issues with a sunshine roof, incorrectly fitted levers, a dangerous mirror, and the rear numberplate suspension. | 18th Dec 1931 | Box 179 \ 1 img172 | |
| Comparative cost and design of a hub, considering an in-house design versus a Dunlop alternative. | 18th Dec 1931 | Box 179 \ 1 img173 | |
| Sketch detailing a drip ledge gap causing noise and the position of gear levers. | 19th Dec 1931 | Box 179 \ 1 img174 | |
| The J.3. Crankshaft Damper and associated crankcase modifications. | 19th Dec 1931 | Box 179 \ 1 img175 | |
| Experiments to improve the silence of the 25HP synchromesh gearbox helical trains. | 19th Dec 1931 | Box 179 \ 1 img176 | |
| Potential causes and solutions for the top gear working out on a 25 HP Synchro Mesh Gearbox. | 19th Dec 1931 | Box 179 \ 1 img177 | |
| List of nine improvements made to a battery ignition system in comparison to the Delco system. | 21th Dec 1931 | Box 179 \ 1 img178 | |
| Fitting of a J. 3. crankshaft damper to a 20/25 HP engine for testing. | 12th Dec 1931 | Box 179 \ 1 img179 | |
| J.3. Battery Ignition system, its components, and potential use on 'B' sports models. | 12th Dec 1931 | Box 179 \ 1 img180 | |
| Experiments to prevent the top gear from disengaging on the 25.HP synchromesh gearbox. | 21th Dec 1941 | Box 179 \ 1 img181 | |
| Modifications to side wheel carriers to accommodate standardized longer bonnets on P.2 and 25HP models. | 21th Dec 1931 | Box 179 \ 1 img182 | |
| Record of a telephone conversation regarding the electrical systems for the Japan III and Peregrine chassis. | 11th Dec 1931 | Box 179 \ 1 img183 | |
| Request to carry out work and submit designs for consideration. | 21th Dec 1931 | Box 179 \ 1 img184 | |
| Sending schedule N.Sch.3395, outlining the frame, springs, and transmission, comparing it to the Peregrine and noting uncertainty about spring flexibility. | 21th Dec 1931 | Box 179 \ 1 img185 | |
| Request for cut up sections of a J.3 cylinder head, with a handwritten note detailing the status of pattern alterations. | 23th Dec 1931 | Box 179 \ 1 img186 | |
| New scheme for flattened steering column controls and a headlamp dipping switch for the P.2 & J.3 models. | 23th Dec 1931 | Box 179 \ 1 img187 | |
| Adoption of Delco-Remy battery ignition components and their high-speed reliability. | 23th Dec 1931 | Box 179 \ 1 img188 | |
| Cover note for document LeC. 2967, which deals with J. F. Battery Ignition. | 23th Dec 1931 | Box 179 \ 1 img189 | |
| Alternative design for a crankshaft drum damper using rubber blocks. | 23th Dec 1931 | Box 179 \ 1 img190 | |
| Cover memo for a preliminary specification for B.2, noting its shared features with the Peregrine. | 23th Dec 1931 | Box 179 \ 1 img191 | |
| Comparative table of components for Peregrine and Bentley models, detailing shared and specific parts. | 23th Dec 1931 | Box 179 \ 1 img192 | |
| Specification comparison sheet for various car parts across Peregrine and Bentley models. | 23th Dec 1931 | Box 179 \ 1 img193 | |
| Comparison table of vehicle parts and systems for different specifications, namely Peregrine and Bentley. | 28th Dec 1931 | Box 179 \ 1 img194 | |
| Carburetter options (RR vs SU) and development for the Continental Phantom programme. | 28th Dec 1931 | Box 179 \ 1 img195 | |
| Layout of the floorboards, referencing schedule 3401 and the design of ribs in the footwell. | 31th Dec 1931 | Box 179 \ 1 img196 | |
| Schematic 3398 for the accelerator pedal, noting its similarity to the one on the Phantom. | 31th Dec 1931 | Box 179 \ 1 img197 | |
| The J. 3. cross steering levers for use with 18' wheel rims. | 31th Dec 1931 | Box 179 \ 1 img198 | |
| Experiments and the incorporation of a reduced size pin for the 25HP S. W. Gearbox. | 31th Dec 1931 | Box 179 \ 1 img199 | |
| Experiments investigating 25 HP engine flywheel vibration and the effects of balance weights. | 1st Dec 1931 | Box 179 \ 2 img001 | |
| Blueprint of a mechanical component cross-section with dimensional and force annotations. | 1st Dec 1931 | Box 179 \ 2 img002 | |
| The lubrication of the 3rd motion shaft in a Chrysler spool gear box. | 1st Dec 1931 | Box 179 \ 2 img003 | |
| Blueprint of a Chrysler 1st Motion Shaft with a spherical motion shaft bearing for testing. | 1st Dec 1931 | Box 179 \ 2 img004 | |
| Water leak issues with evaporatively cooled 'Kestrel' engines in the 'Southampton Flying Boat'. | 1st Dec 1931 | Box 179 \ 2 img005 | |
| The results of tests on exhaust system losses using a 114° camshaft. | 2nd Dec 1931 | Box 179 \ 2 img006 | |
| Performance graph comparing manifold only and full exhaust systems on a Phantom II engine. | 30th Nov 1931 | Box 179 \ 2 img007 | |
| Performance analysis graph of various short-type exhaust system configurations against engine RPM. | 30th Nov 1931 | Box 179 \ 2 img008 | |
| The effect of jacket water temperature on detonation in 'Buzzard' engines. | 4th Dec 1931 | Box 179 \ 2 img009 | |
| Comparative power and detonation curve graph for a Buzzard modified supercharged engine at normal and boiling water outlet temperatures. | 1st Dec 1931 | Box 179 \ 2 img010 | |
| The development and testing of a water level indicator for an aircraft engine header tank. | 31th Dec 1931 | Box 179 \ 2 img011 | |
| Specifications and testing details for a tank warning level device, including ejector pipe and bottle particulars. | 1st Dec 1931 | Box 179 \ 2 img012 | |
| Blueprint detailing the leading particulars of a water level indicator for aircraft cooling systems. | 3rd Dec 1931 | Box 179 \ 2 img013 | |
| Correspondence concerning a sample Polarised Moving Iron Ammeter from the Weston Electrical Instrument Co. | 1st Dec 1931 | Box 179 \ 2 img014 | |
| Test report on 1st and 2nd gears with removed overhanging bosses for a PII Synchromesh gearbox. | 7th Dec 1931 | Box 179 \ 2 img015 | |
| Blueprint of a machined part with dimensional annotations and modification notes. | 2nd Dec 1931 | Box 179 \ 2 img016 | |
| Test drive report and description of the Denison-Burney Streamline Car. | 7th Dec 1931 | Box 179 \ 2 img017 | |
| Review of a competitor's car design, focusing on its features, performance, and business potential. | 7th Dec 1931 | Box 179 \ 2 img018 | |
| Summary of two tests conducted on the Development Hawk 114° camshaft regarding exhaust duration and valve lift. | 7th Dec 1931 | Box 179 \ 2 img019 | |
| Performance comparison graph of a 114° camshaft versus a two-inlet-cam camshaft setup, showing BHP and BMEP against RPM. | 27th Nov 1931 | Box 179 \ 2 img020 | |
| Performance graph comparing high and low lift rockers on the 114° camshaft E 82448. | 28th Nov 1931 | Box 179 \ 2 img021 | |
| Test drive and evaluation of Sir Denistoun Burney's car, comparing its performance and lack of engine noise to other models. | 7th Dec 1931 | Box 179 \ 2 img022 | |
| Modifications and tests to overcome water flow reversals in the 'Kestrel' 25 engine's water system. | 8th Dec 1931 | Box 179 \ 2 img023 | |
| Results of tests investigating the reversal of water flow in an engine under three different configurations. | 8th Dec 1931 | Box 179 \ 2 img024 | |
| Tests carried out on a higher compression cylinder head, comparing twin choke and single expanding carburetors. | 9th Dec 1931 | Box 179 \ 2 img025 | |
| Visit to Martlesham investigating engine 'cutting out' issues on a Hawker Fury aircraft at high altitude. | 9th Dec 1931 | Box 179 \ 2 img026 | |
| High-altitude engine performance issues, including fuel distribution and freezing, with proposed solutions. | 9th Dec 1931 | Box 179 \ 2 img027 | |
| Ongoing tests on induction pipes to solve issues of bad distribution and diffuser freezing at low temperatures. | 9th Dec 1931 | Box 179 \ 2 img028 | |
| The rating and preliminary development tests for the 1000 HP Buzzard engine. | 9th Dec 1931 | Box 179 \ 2 img029 | |
| Engine test results and recommendations concerning detonation at various speeds and loads. | 9th Dec 1931 | Box 179 \ 2 img030 | |
| Power curve graph for an 'R' Mod Supercharged Engine at full throttle between 1800 and 2400 R.P.M. | 4th Dec 1931 | Box 179 \ 2 img031 | |
| Graph of detonation intensity at varying speeds for 'R' Mod supercharged engines. | 4th Dec 1931 | Box 179 \ 2 img032 | |
| The condition of an engine stripped after a 25,000-mile test run on Aero Shell oil. | 1st Dec 1931 | Box 179 \ 2 img033 | |
| Chassis condition report detailing wear and issues on components like axles, brakes, and clutch. | 1st Dec 1931 | Box 179 \ 2 img034 | |
| The condition of road springs and hydraulic shock dampers. | 1st Dec 1931 | Box 179 \ 2 img035 | |
| Summary of issues regarding brake wear, drip plugs, and crankshaft bearings, along with proposed improvements. | 1st Dec 1931 | Box 179 \ 2 img036 | |
| Cylinder bore wear measurements for a 25 EX engine after mileage on Shell oil. | 26th Nov 1931 | Box 179 \ 2 img037 | |
| Investigation into the method of regulation for an engine-driven aero generator with a Mark II regulator. | 9th Dec 1931 | Box 179 \ 2 img038 | |
| Description of the regulator's function in limiting charging current to the accumulator. | 1st Dec 1931 | Box 179 \ 2 img039 | |
| Fuel distribution tests on vertical carburettors and induction systems. | 10th Dec 1931 | Box 179 \ 2 img040 | |
| Performance graph comparing two vertical S.U. carburettor setups based on air valve orientation. | 10th Dec 1931 | Box 179 \ 2 img041 | |
| Power curves and performance tests for engines with higher compression pistons and different exhaust systems. | 10th Dec 1931 | Box 179 \ 2 img042 | |
| Performance graph showing power output for a CXII high-lift unit with varying manifold and exhaust configurations. | 4th Dec 1931 | Box 179 \ 2 img043 | |
| Power output chart for a C18 unit with camshaft E57177, showing performance with a larger carburetter under various exhaust configurations. | 4th Dec 1931 | Box 179 \ 2 img044 | |
| Power output performance graph for a CTR Unit China RM 55 engine. | 1st Dec 1931 | Box 179 \ 2 img045 | |
| Blueprint graph showing engine power output curves for a C10 unit for a 19.G.IV engine. | 1st Dec 1931 | Box 179 \ 2 img046 | |
| Series of tests to eliminate induction pipe power roar. | 12th Dec 1931 | Box 179 \ 2 img047 | |
| Induction pipe arrangement and carburettor trials with associated blueprint sketches. | 12th Dec 1931 | Box 179 \ 2 img048 | |
| Report page detailing experiments and blueprints for modifying induction pipes and carburettors to reduce engine roar. | 12th Dec 1931 | Box 179 \ 2 img049 | |
| Test report on carburettor and induction pipe configurations, including a blueprint for a single S.U. induction pipe. | 12th Dec 1931 | Box 179 \ 2 img050 | |
| Carburettor, induction pipe, and silencer performance tests, including a blueprint diagram for a silencer. | 12th Dec 1931 | Box 179 \ 2 img051 | |
| Photograph of an engine bay, focusing on the engine and its components. | 12th Dec 1931 | Box 179 \ 2 img052 | |
| Photograph of an engine bay showing twin carburettors with large circular air cleaners. | 12th Dec 1931 | Box 179 \ 2 img053 | |
| Photograph of a car engine bay, viewed from the side. | 27th Nov 1931 | Box 179 \ 2 img054 | |
| Performance graph showing the effect of induction pipe diameter on a twin carburetor engine. | 27th Nov 1931 | Box 179 \ 2 img055 | |
| Performance graph comparing different carburetter and induction pipe layouts. | 10th Dec 1931 | Box 179 \ 2 img056 | |
| Flexo Mono carburetters being ready for road use on a 16-G-IV model, with an attached power curve from testing on a Japan I unit. | 14th Dec 1931 | Box 179 \ 2 img057 | |
| Power output graph for a 'Japan Unit' engine with specified carburettor, camshaft, and valve modifications. | 12th Dec 1931 | Box 179 \ 2 img058 | |
| Performance and design of shock absorbers mounted outside the frame. | 14th Dec 1931 | Box 179 \ 2 img059 | |
| Requesting the replacement of a print due to an error in its title. | 14th Dec 1931 | Box 179 \ 2 img060 | |
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