| Description | Date | Identifier | |
| Car suspension, front wheel articulation, and the practicality of the Dubonnet scheme. | 30th Nov 1932 | Box 179b \ 1 img200 | |
| Query to the Experimental Department regarding the lubrication of the servo drive in the P.2. gearbox. | 30th Nov 1932 | Box 179b \ 1 img201 | |
| Suggestion for modifications to a Damper Release Valve following a trial. | 12th Dec 1932 | Box 179b \ 1 img202 | |
| Diagram of the Bensport braking system and its comparison with other models. | 23th Dec 1932 | Box 179b \ 1 img203 | |
| The design, installation, and dismounting procedure for the Bensport gearbox suspension. | 23th Dec 1932 | Box 179b \ 1 img204 | |
| Discussion of four methods for an over-riding hand control for dampers. | 5th Dec 1932 | Box 179b \ 1 img205 | |
| Two graphs comparing damping force against speed for different suspension control methods. | 6th Dec 1932 | Box 179b \ 1 img206 | |
| Work in progress report on modifications to carburetter, steering, brakes, exhaust, and damper systems. | 6th Dec 1932 | Box 179b \ 1 img207 | |
| Modifications to brake shoes, independent wheel suspension, and a sliding propeller shaft joint. | 6th Dec 1932 | Box 179b \ 1 img208 | |
| High oil temperature of the Peregrine engine and proposed cooling solutions. | 6th Dec 1932 | Box 179b \ 1 img209 | |
| Performance of shock dampers, oil loss issues, and potential improvements. | 6th Dec 1932 | Box 179b \ 1 img210 | |
| The Peregrine engine's fuel consumption and potential improvements through valve and cam angle adjustments. | 9th Dec 1932 | Box 179b \ 1 img211 | |
| Providing design feedback on a Peregrine drain cock and front engine suspension. | 9th Dec 1932 | Box 179b \ 1 img212 | |
| On the Bensport Braking System, discussing the principle of moving to hydraulic operation and improving the mechanical system. | 7th Dec 1932 | Box 179b \ 1 img213 | |
| Trial run report and comparison of a Thrupp & Maberly bodied Alvis Speed Twenty saloon. | 7th Dec 1932 | Box 179b \ 1 img214 | |
| Road test report on a car model detailing driving impressions, pricing, sales figures, and a comparison with a future model. | 7th Dec 1932 | Box 179b \ 1 img215 | |
| Modifications to the Benpsort 3rd crossmember and frame side member. | 7th Dec 1932 | Box 179b \ 1 img216 | |
| Bensport pedals modified to suit the J. L. engine, referencing drawing sch. 3617. | 28th Dec 1932 | Box 179b \ 1 img217 | |
| Potential solutions for issues with the Phantom Gearbox's second speed synchro-mesh. | 1st Dec 1932 | Box 179b \ 1 img218 | |
| Deferring work on the internal combustion turbine to focus on more immediate commercial projects. | 9th Dec 1932 | Box 179b \ 1 img219 | |
| Design and development of an experimental compression ignition two-stroke engine. | 6th Dec 1932 | Box 179b \ 1 img220 | |
| Potential engine design issues with the little end, piston cooling, and combustion chamber. | 9th Dec 1932 | Box 179b \ 1 img221 | |
| Benefits and wider adoption of an anti-spilling valve on radiators. | 9th Dec 1932 | Box 179b \ 1 img222 | |
| New material for a petrol pump diaphragm and expressing a preference for a corrugated design. | 9th Dec 1932 | Box 179b \ 1 img223 | |
| Bensport brake leverages, detailing scheme 3615 for a three-rod connection. | 10th Dec 1932 | Box 179b \ 1 img224 | |
| Letter to coachbuilder Thrupp & Maberly regarding the construction of sample bodies for a Bentley 'B'. | 10th Dec 1932 | Box 179b \ 1 img225 | |
| Specification of coachwork for a Thrupp & Maberly Sports Saloon on a Bentley 'B' model chassis. | 1st Feb 1933 | Box 179b \ 1 img226 | |
| Specifications for a Four Door Sports Saloon coachwork, including accessories, weight limits, delivery, and a list of related drawings. | 1st Feb 1933 | Box 179b \ 1 img227 | |
| The painting and heater installation for Sir Henry Royce's car. | 10th Dec 1932 | Box 179b \ 1 img228 | |
| Causes of transmission rattles, referencing historical context from the Silver Ghost and potential solutions like rubber couplings. | 12th Dec 1932 | Box 179b \ 1 img229 | |
| Three methods for achieving satisfactory engagement in single-plate clutches. | 12th Dec 1932 | Box 179b \ 1 img230 | |
| Design and effectiveness of brake servos, particularly for the Peregrine model, and a new proposed system for the 25HP model. | 12th Dec 1932 | Box 179b \ 1 img231 | |
| Use of hydraulic transmission and servo versus direct braking. | 12th Dec 1932 | Box 179b \ 1 img232 | |
| Modifications to the steering and front suspension to lower the Peregrine carburetter for effective distribution. | 12th Dec 1932 | Box 179b \ 1 img233 | |
| Issues with back axle control and suggesting potential improvements. | 12th Dec 1932 | Box 179b \ 1 img234 | |
| Replacement of item 16-G-4 with 20-G-4 and its transportation to Derby. | 13th Dec 1932 | Box 179b \ 1 img235 | |
| Modification to the Peregrine rear engine suspension, suggesting a rubber bush to replace the ferodo. | 12th Dec 1932 | Box 179b \ 1 img236 | |
| Instruction to modify the Peregrine carburetter's venturi tube for less air obstruction. | 15th Dec 1932 | Box 179b \ 1 img237 | |
| Modifications to the Peregrine steering column to fit a larger carburetter. | 15th Dec 1932 | Box 179b \ 1 img238 | |
| Modification to the Peregrine steering tube and pendulum lever. | 17th Dec 1932 | Box 179b \ 1 img239 | |
| Peregrine steering clearances, the steering box, and the scaling down of the whole steering system. | 17th Dec 1932 | Box 179b \ 1 img240 | |
| Modifications for fitting front axle control to existing 20/25 cars. | 17th Dec 1932 | Box 179b \ 1 img241 | |
| Providing a thrust surface for the reverse gear and retaining the servo drive lubrication scheme. | 17th Dec 1932 | Box 179b \ 1 img242 | |
| Arrangements for the collection and fitting of two Bensport bodies, a saloon and an open car. | 19th Dec 1932 | Box 179b \ 1 img243 | |
| Modifications to the Benesport servo brake system to reduce friction and alter leverage. | 19th Dec 1932 | Box 179b \ 1 img244 | |
| Design and material choices for a Private Venture aero engine. | 23th Dec 1932 | Box 179b \ 1 img245 | |
| Technical report discussing cylinder distortion, P.V. blower drive, and propeller design. | 23th Dec 1932 | Box 179b \ 1 img246 | |
| Performance of the Peregrine model, including comparisons, and component considerations for gearboxes and damper control. | 23th Dec 1932 | Box 179b \ 1 img247 | |
| Design for a helical second-speed gear for the 'Prechine' model. | 24th Dec 1932 | Box 179b \ 1 img248 | |
| Shock dampers, detailing a differential drilling method for locking the lever bolt nuts. | 24th Dec 1932 | Box 179b \ 1 img249 | |
| Print for an independent front wheel suspension system and its potential patentability. | 24th Dec 1932 | Box 179b \ 1 img250 | |
| List and comparison of Bentley 'A' and 'B' model body weights with an explanation of weighing methods. | 24th Dec 1932 | Box 179b \ 1 img251 | |
| Investigation into excessive torsion on the Peregrine foot brake leverages and proposed modifications. | 24th Dec 1932 | Box 179b \ 1 img252 | |
| New scheme for the Peregrine steering column and the angle of the worm gear. | 24th Dec 1932 | Box 179b \ 1 img253 | |
| Design and material choice for wider brake drums and steel shoes for the Phantom II. | 24th Dec 1932 | Box 179b \ 1 img254 | |
| Proposal to manufacture the Peregrine dashboard as a pressing. | 12th Dec 1932 | Box 179b \ 1 img255 | |
| Temporary scheme for a helical second-speed gear and proposed design alterations. | 29th Dec 1932 | Box 179b \ 1 img256 | |
| Scaling down of components for the Peregrine steering column, including the wheel boss and central switch. | 29th Dec 1932 | Box 179b \ 1 img257 | |
| Suggesting actions to be taken by Derby regarding the exhaust fishtail and petrol filler for the Peregrine model. | 3rd Jan 1933 | Box 179b \ 1 img258 | |
| Procurement of a set of wheel discs for Bensport and Peregrine models. | 9th Jan 1933 | Box 179b \ 1 img259 | |
| Design changes to differentiate the Peregrine model from the 25.HP model, focusing on coachwork and the instrument panel. | 9th Jan 1933 | Box 179b \ 1 img260 | |
| Steering wheel positions and adjustments for the Peregrine models. | 9th Jan 1933 | Box 179b \ 1 img261 | |
| Confirming agreements on design criticisms and modifications for the 2.Pere.2 model. | 9th Jan 1933 | Box 179b \ 1 img262 | |
| Modifications to the exhaust fish-tail and steering column controls. | 9th Jan 1933 | Box 179b \ 1 img263 | |
| Clearance between engaging teeth for helical second-speed gears on various car models. | 14th Jan 1933 | Box 179b \ 1 img264 | |
| The design scheme for a helical second speed for Bensport, detailing modifications and bearing considerations. | 14th Jan 1933 | Box 179b \ 1 img265 | |
| Alternative arrangements and bearing types for the Peregrine Transmission Shaft. | 14th Jan 1933 | Box 179b \ 1 img266 | |
| The arrangement and positioning of a scaled-down steering column. | 14th Jan 1933 | Box 179b \ 1 img267 | |
| Adaptation of a 3-bolter shock damper for the 25HP front axle control. | 14th Jan 1933 | Box 179b \ 1 img268 | |
| Letter discussing modifications and comparisons related to the Peregrine Clutch design. | 17th Jan 1933 | Box 179b \ 1 img269 | |
| The Peregrine steering column, its position, and the gastighting of the floorboards. | 17th Jan 1933 | Box 179b \ 1 img270 | |
| Technical design suggestions for the P.V. Engine and other experimental work. | 21th Jan 1933 | Box 179b \ 1 img271 | |
| Technical memorandum discussing design improvements and weaknesses in engine components like liners, pistons, connecting rods, and controls. | 21th Jan 1933 | Box 179b \ 1 img272 | |
| Design flaws in riveted levers and proposing improvements based on design DES.1522. | 23th Jan 1933 | Box 179b \ 1 img273 | |
| Technical letter discussing camshaft timing and engine performance for Bensport and Peregrine models. | 23th Jan 1933 | Box 179b \ 1 img274 | |
| Alternative designs for the Bensport gearbox actuating shafts. | 13th Jan 1923 | Box 179b \ 1 img275 | |
| Modifications to the universal coupling for helical second speed gears. | 19th Jan 1933 | Box 179b \ 1 img276 | |
| Coupling for the Bancroft gearbox damper governor drive. | 19th Jan 1933 | Box 179b \ 1 img277 | |
| Proposed re-arrangement for the Peregrine steering system controls. | 1st Jan 1933 | Box 179b \ 1 img278 | |
| High production cost of a patent luggage carrier and potential cost-reduction strategies. | 21th Jan 1933 | Box 179b \ 1 img279 | |
| Listing five key questions regarding the design and performance of aero engine connecting rods. | 23th Jan 1933 | Box 179b \ 1 img280 | |
| Modifications to the lever in the rocking shaft for J.3 type dampers. | 23th Jan 1933 | Box 179b \ 1 img281 | |
| Suggestions for higher indirect gear ratios for a Bensport 20/25 gearbox. | 24th Jan 1933 | Box 179b \ 1 img282 | |
| Alternative 'Bensport' gear ratios and their performance implications for competition. | 25th Jan 1933 | Box 179b \ 1 img283 | |
| The seizure of bearings in silent 3rd speed wheels and potential lubrication issues. | 25th Jan 1933 | Box 179b \ 1 img284 | |
| Modification to the J. 3 type spring-loaded damper gland. | 25th Jan 1933 | Box 179b \ 1 img285 | |
| Trial to reduce the speed of a Peregrine Dynamo. | 27th Jan 1933 | Box 179b \ 1 img286 | |
| Technical memorandum discussing design improvements for shock dampers, focusing on glands and lever attachments. | 27th Jan 1933 | Box 179b \ 1 img287 | |
| Overload testing on four different fixing models to determine their margin of safety. | 28th Jan 1933 | Box 179b \ 1 img288 | |
| Proposed scheme to address Bensport flywheel vibrations using a tail bearing. | 28th Jan 1933 | Box 179b \ 1 img289 | |
| Technical memorandum discussing transmission slack in compound epicyclic gears and the role of fluid flywheels. | 28th Jan 1933 | Box 179b \ 1 img290 | |
| Roller bearing sliding joint on a propeller shaft, designed for the Peregrine car. | 28th Jan 1933 | Box 179b \ 1 img291 | |
| The urgent need to improve the riding of the 45hp model with more effective dampers and automatic control. | 30th Jan 1933 | Box 179b \ 1 img292 | |
| Issues and proposed improvements for the Peregrine model. | 30th Jan 1933 | Box 179b \ 1 img293 | |
| With three technical points regarding aero engine design. | 30th Jan 1933 | Box 179b \ 1 img294 | |
| Design changes to the shock dampers, specifically the lever boss and damper position. | 31th Jan 1933 | Box 179b \ 1 img295 | |
| Solution for damper shaft distortion upon tightening a bolt. | 31th Jan 1933 | Box 179b \ 1 img296 | |
| Copy of a telephone message discussing an aero engine problem, specifically concerning bearings and connecting rods. | 6th Feb 1933 | Box 179b \ 1 img297 | |
| Engine modifications and parts for high power testing, focusing on Goshawk engine reliability and lubrication. | 6th Feb 1933 | Box 179b \ 1 img298 | |
| Continued memorandum discussing the fitting of bearings with oil grooves and holes to get a true oil pressure reading in the crankshaft. | 1st Feb 1933 | Box 179b \ 1 img299 | |
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