| Description | Date | Identifier | |
| Progress report on a 15,000-mile test in France for the 20/25 HP model, detailing issues with steering, oil consumption, roll-rod, and clutch. | 28th Aug 1936 | Box 82 \ 4 scan0364 | |
| The development and testing of components including petrol pumps, cylinder heads, and brakes for various models. | 28th Aug 1936 | Box 82 \ 4 scan0365 | |
| 15,000-mile Bentley test in France, focusing on brake and clutch performance. | 28th Mar 1936 | Box 82 \ 4 scan0366 | |
| Development issues including spark plugs, oil consumption, brakes, exhaust, engine mounting and ride quality. | 28th Aug 1936 | Box 82 \ 4 scan0367 | |
| Progress report on developments including suspension, tyres, bodywork, and engine units. | 28th Aug 1936 | Box 82 \ 4 scan0368 | |
| The Tourist Trophy car's performance, modifications, and departure for Ireland. | 28th Aug 1936 | Box 82 \ 4 scan0369 | |
| Serious complaints regarding the Phantom III model, including steering, gearbox, and clutch issues. | 28th Sep 1936 | Box 82 \ 4 scan0370 | |
| Typed report detailing minor troubles and development progress on various vehicle components. | 28th Sep 1936 | Box 82 \ 4 scan0371 | |
| Progress report on vehicle component testing and issues such as carburation, tyre noise and silent tappets. | 28th Sep 1936 | Box 82 \ 4 scan0372 | |
| Progress report on the 25/30 HP model, covering tests and updates on steering, oil consumption, clutch, and idling. | 28th Sep 1936 | Box 82 \ 4 scan0373 | |
| Progress report on Bentley vehicle testing, covering engine wear, brakes, clutch, and fuel issues. | 28th Sep 1936 | Box 82 \ 4 scan0374 | |
| Progress report on development projects including the exhaust system, ride improvement, body, engine unit, and rear axle design. | 28th Sep 1936 | Box 82 \ 4 scan0375 | |
| Sending prints for a Bentley O.H.C. Conversion Unit exhaust manifold and pipe flange. | 29th Sep 1936 | Box 82 \ 4 scan0376 | |
| Cover letter for a report on high power development work on test beds in connection with the Ulster Tourist Trophy Race. | 1st Oct 1936 | Box 82 \ 4 scan0377 | |
| Power development tests and modifications for the 4¼ Litre Bentley engine. | 1st Oct 1936 | Box 82 \ 4 scan0378 | |
| Engine performance tests with a special fuel blend, including issues encountered and modifications made in preparation for the Le Mans race. | 1st Oct 1936 | Box 82 \ 4 scan0379 | |
| Exhaust and inlet valve failures, material changes, and subsequent valve spring tests. | 1st Oct 1936 | Box 82 \ 4 scan0380 | |
| Power development through modifications to cylinder head Ex.22594, detailing changes and test results. | 1st Oct 1936 | Box 82 \ 4 scan0381 | |
| Comparison of various fuel grades and their detonation characteristics for the Tourist Trophy race. | 1st Oct 1936 | Box 82 \ 4 scan0382 | |
| Fuel and gasket performance tests. | 1st Oct 1936 | Box 82 \ 4 scan0383 | |
| Sparking plug selection and induction system development for a T.T. engine, including valve and carburettor modifications. | 1st Oct 1936 | Box 82 \ 4 scan0384 | |
| Camshaft performance tests and variations in cam duration. | 1st Oct 1936 | Box 82 \ 4 scan0385 | |
| Conclusion of tests on high lift rockers and 'R' type camshafts, including results from Test No.3. | 1st Oct 1936 | Box 82 \ 4 scan0386 | |
| Camshaft tests and cylinder head development for Bentley and 25/30 engines. | 1st Oct 1936 | Box 82 \ 4 scan0387 | |
| Graph plotting Brake Horsepower against RPM for Bentley engines used in the Tourist Trophy races from 1934-1936. | 1st Oct 1936 | Box 82 \ 4 scan0388 | |
| Graph showing power development for a 4 1/4 litre Bentley engine with various compression ratios and configurations. | 1st Oct 1936 | Box 82 \ 4 scan0389 | |
| Graph plotting ignition advance and B.M.E.P. against R.P.M. for a 4¼ Litre Bentley engine with different configurations. | 1st Oct 1936 | Box 82 \ 4 scan0390 | |
| Graph comparing power development for a 4¼ Litre Bentley engine with different induction system configurations. | 1st Oct 1936 | Box 82 \ 4 scan0391 | |
| Graph plotting the variation of cam duration by tappet clearance for a 4 1/4 Litre Bentley engine. | 1st Oct 1936 | Box 82 \ 4 scan0392 | |
| Power development graph for a 4¼ Litre Bentley engine, testing different camshaft configurations. | 1st Oct 1936 | Box 82 \ 4 scan0393 | |
| Power development graph for a 4 1/4 Litre Bentley engine, comparing camshaft performance. | 6th Oct 1936 | Box 82 \ 4 scan0394 | |
| Gasket issues and proposed replacements for a Bentley O.H.C. Conversion Unit. | 6th Oct 1936 | Box 82 \ 4 scan0395 | |
| The re-numbering procedure for six 3 1/2 Litre Bentley Chassis. | 5th Oct 1936 | Box 82 \ 4 scan0396 | |
| Experiments on the Overhead Camshaft Bentley engine, focusing on silencing rather than thermodynamics. | 14th Oct 1936 | Box 82 \ 4 scan0397 | |
| Change of plans for the inspection of new headlights. | 14th Oct 1936 | Box 82 \ 4 scan0398 | |
| Confirming the investigation into fitting a Wraith gearbox to an independent suspension Bentley. | 16th Oct 1936 | Box 82 \ 4 scan0399 | |
| Requesting reports on a 20/25 HP cylinder head and two Bentley engine tests. | 19th Oct 1936 | Box 82 \ 4 scan0400 | |
| To RHC summarizing a list of current car work jobs. | 19th Oct 1936 | Box 82 \ 4 scan0401 | |
| Engineering notes on vehicle components including brakes, clutch, steering, fan, radiators, and cylinders. | 19th Oct 1936 | Box 82 \ 4 scan0402 | |
| List of parts and modifications for Bentley, 25/30 HP, and Phantom III units. | 19th Oct 1936 | Box 82 \ 4 scan0403 | |
| List of engine component modifications and associated parts references. | 19th Oct 1936 | Box 82 \ 4 scan0404 | |
| Tests to improve the slow running performance of a Bentley engine. | 23th Oct 1936 | Box 82 \ 4 scan0405 | |
| Difference between carburetters and ignition timing for deturbulated cylinder heads. | 23th Oct 1936 | Box 82 \ 4 scan0406 | |
| Contemplating the standardisation of the Bentley spring drive to reduce manufacturing costs. | 26th Oct 1936 | Box 82 \ 4 scan0407 | |
| Special parts and replacements for the Flywheel, Clutch, and Crankshaft on a Bentley II Chassis. | 26th Oct 1936 | Box 82 \ 4 scan0408 | |
| Telegram from Pomeroy Havilland apologising for being unable to manage a visit on Wednesday morning. | 31th Oct 1936 | Box 82 \ 4 scan0409 | |
| Methods of securing bolts on rear brake drums for car model 3-B-IV. | 21th Dec 1936 | Box 82 \ 5 scan0001 | |
| Car testing arrangements and modifications in France, including issues with towing and roll-rods. | 20th Feb 1937 | Box 82 \ 5 scan0002 | |
| Oil leakage issue onto rear brake linings from a new shaft oiling scheme, and a request for replacement plugs. | 23th Feb 1937 | Box 82 \ 5 scan0003 | |
| Typed memo confirming receipt of a telegram regarding a meeting. | 22th Feb 1937 | Box 82 \ 5 scan0004 | |
| The setup and potential issues with Gordon Armstrong rear dampers for endurance testing on a 3.B.IV model. | 22th Feb 1937 | Box 82 \ 5 scan0005 | |
| Arranging for a car to be met in Boulogne, France, for safety checks and supervised testing. | 19th Feb 1937 | Box 82 \ 5 scan0006 | |
| Arrangements for radiator tests in France, requesting parts and customs papers. | 19th Feb 1937 | Box 82 \ 5 scan0007 | |
| Testing schedules for cars 3.B.IV and 35-EX, including details on radiator shutters and roll rod configurations. | 17th Feb 1937 | Box 82 \ 5 scan0008 | |
| Work order detailing modifications and part replacements for a specific car. | 16th Feb 1937 | Box 82 \ 5 scan0009 | |
| Instruction to fit Bentley Chromidium Drums to car 3BIV before its departure for France. | 13th Feb 1937 | Box 82 \ 5 scan0010 | |
| Modifications to a radiator and bonnet rest for car 3 B.IV. | 10th Feb 1937 | Box 82 \ 5 scan0011 | |
| Request to modify or prepare a propeller shaft to overcome out-of-balance effects from grease in sliding joints. | 2nd Feb 1937 | Box 82 \ 5 scan0012 | |
| Modification to the lubrication of a propeller shaft sliding joint for a Bentley. | 22th Jan 1937 | Box 82 \ 5 scan0013 | |
| The removal of the reserve tap on the petrol line for model 3-B-IV. | 22th Jan 1937 | Box 82 \ 5 scan0014 | |
| Plan to build a new radiator for car 3.B.1V and send the old one to France for car 6.B.1V. | 20th Jan 1937 | Box 82 \ 5 scan0015 | |
| The replacement radiator matrix and thermometer required for car 3.B.1V, intended for France. | 19th Jan 1937 | Box 82 \ 5 scan0016 | |
| Rear axle oil levels and type for a car to be run in France. | 14th Jan 1937 | Box 82 \ 5 scan0017 | |
| List of ten modifications and checks for chassis 3.B.IV, with a deadline of Christmas. | 18th Dec 1936 | Box 82 \ 5 scan0018 | |
| Instructions for rectifying low oil pressure and details of bearings for a B.III - 3.B.IV chassis. | 3rd Mar 1937 | Box 82 \ 5 scan0019 | |
| Cooling tests carried out on car 3.B.IV at the Montlhery track. | 4th Mar 1937 | Box 82 \ 5 scan0020 | |
| Test report comparing the cooling performance of different radiator matrix and shutter grille designs. | 4th Mar 1937 | Box 82 \ 5 scan0021 | |
| Summary of test results detailing engine cooling performance under various speeds and radiator configurations. | 5th Mar 1937 | Box 82 \ 5 scan0022 | |
| Instruction to delete fuses on petrol pumps for car 3-B-IV and connect wires directly to bakelite terminals. | 5th Mar 1937 | Box 82 \ 5 scan0023 | |
| Telegram reporting on daily updates and an arrival in Chateauroux. | 10th Mar 1937 | Box 82 \ 5 scan0024 | |
| Telegram exchange regarding overdue reports on projects 3.B or 6.B. | 8th Mar 1937 | Box 82 \ 5 scan0025 | |
| Fitting a Chevrolet suction ignition control to a Bentley, including test results and fitting instructions. | 8th Mar 1937 | Box 82 \ 5 scan0026 | |
| Instructions for replacing the front carburetter and connecting the suction pipe. | 8th Mar 1937 | Box 82 \ 5 scan0027 | |
| Despatch request for a carburetter, suction unit, and connecting pipe to I.M. Waller in France. | 9th Mar 1937 | Box 82 \ 5 scan0028 | |
| The arrival of a car from Paris and the status of ongoing repair work. | 9th Mar 1937 | Box 82 \ 5 scan0029 | |
| Lack of daily reports for two Bentley cars and issues with French approval for headlamps. | 11th Mar 1937 | Box 82 \ 5 scan0030 | |
| Additional oil filler breather and a water pump rotor. | 11th Mar 1937 | Box 82 \ 5 scan0031 | |
| Inspection, issues found, and work performed on the rear brakes. | 10th Mar 1937 | Box 82 \ 5 scan0032 | |
| Modifications and work carried out on vehicle 3.B.IV. | 10th Mar 1937 | Box 82 \ 5 scan0033 | |
| Component performance, logistics, and proposed modifications for cars 35-EX and 3.B.1V. | 12th Mar 1937 | Box 82 \ 5 scan0034 | |
| Severe brake issues on car 35-EX, including worn rear brakes, locking, and groaning noises. | 12th Mar 1937 | Box 82 \ 5 scan0035 | |
| The unexpected performance of Gordon Armstrong rear dampers during testing in France. | 12th Mar 1937 | Box 82 \ 5 scan0036 | |
| Impressions and criticisms of a car after examination and testing in France. | 12th Mar 1937 | Box 82 \ 5 scan0037 | |
| The favorable features of an engine's performance. | 15th Mar 1937 | Box 82 \ 5 scan0038 | |
| Query regarding potential oil leakage from a modified rear axle on car 3.B.IV. | 15th Mar 1937 | Box 82 \ 5 scan0039 | |
| Brake performance issues and required maintenance for model 3.B.IV. | 16th Mar 1937 | Box 82 \ 5 scan0040 | |
| Telegram reporting a broken piece on a Silchrome exhaust valve and a scored cylinder, with a request for parts. | 16th Mar 1937 | Box 82 \ 5 scan0041 | |
| Issue with the change speed lever sticking on the gate. | 16th Mar 1937 | Box 82 \ 5 scan0042 | |
| Sketch with notes showing the operation of the outer end of an isolated change speed lever and guide pin for a Bentley 3BIV. | 16th Mar 1937 | Box 82 \ 5 scan0043 | |
| Sticking change speed lever, its cause, and potential remedies. | 16th Mar 1937 | Box 82 \ 5 scan0044 | |
| Sticking change speed lever due to a misaligned guide pin. | 16th Mar 1937 | Box 82 \ 5 scan0045 | |
| The adjustment of Gordon Armstrong rear dampers to prevent pitching. | 17th Mar 1937 | Box 82 \ 5 scan0046 | |
| Oil leaks, component issues, and standardisation for cars 3.B.IV and 35-EX. | 17th Mar 1937 | Box 82 \ 5 scan0047 | |
| Requesting a list of new features on an experimental car, specifically asking about the brakes. | 17th Mar 1937 | Box 82 \ 5 scan0048 | |
| List of interesting design and cost-saving features on a specific car model, replying to an earlier query. | 18th Mar 1937 | Box 82 \ 5 scan0049 | |
| Letter discussing oil pressure drop and relief valve spring issues on car models 3.B.IV and 6.B.IV. | 17th Mar 1937 | Box 82 \ 5 scan0050 | |
| Short memo confirming the receipt of a standard Bentley Oil Pipe and requesting instructions. | 17th Mar 1937 | Box 82 \ 5 scan0051 | |
| Oil leaks from the rear axle and pinion housing of a car. | 17th Mar 1937 | Box 82 \ 5 scan0052 | |
| Telegram received by telephone regarding the correct length of a wire for levers on a front equaliser shaft. | 18th Mar 1937 | Box 82 \ 5 scan0053 | |
| Telegram regarding the correct wire length for levers on an equaliser shaft. | 18th Mar 1920 | Box 82 \ 5 scan0054 | |
| | | | |
