| Description | Date | Identifier | |
| Proposing tests to investigate the phenomenon of engine 'running after switching off' during cylinder head comparisons. | 4th Jun 1940 | Box 124 \ 2 scan0192 | |
| Issue of 'running after switching off' and the role of sodium-filled versus solid exhaust valves. | 17th Jun 1940 | Box 124 \ 2 scan0193 | |
| Test report on water circulation modifications to address exhaust valve temperature and engine 'running on'. | 17th Jun 1940 | Box 124 \ 2 scan0194 | |
| Modifications to engine water cooling galleries and future valve considerations. | 20th Jun 1940 | Box 124 \ 2 scan0195 | |
| New List of Parts for the Crankcase & Bearings to suit the L.H. Silver Phantom. | 20th Jun 1940 | Box 124 \ 2 scan0196 | |
| Modifications to the B.80 Studebaker Crankshaft Damper. | 20th Jun 1940 | Box 124 \ 2 scan0197 | |
| New and existing parts required for the B.80 Front Engine Mounting scheme. | 20th Jun 1940 | Box 124 \ 2 scan0198 | |
| Status report on existing engine units under development at the time of a work stoppage. | 5th Jul 1940 | Box 124 \ 2 scan0199 | |
| Outstanding new units and the development status of a one-piece crankshaft. | 5th Jul 1940 | Box 124 \ 2 scan0200 | |
| Changes to crank drawing RE.869, cost-saving measures, and problems concerning the crankshaft damper. | 5th Jul 1940 | Box 124 \ 2 scan0201 | |
| The development and issues concerning camwheels, connecting rods, and pistons. | 5th Jul 1940 | Box 124 \ 2 scan0202 | |
| Aerolite and split skirt pistons, including details on grinding, and test bed results for cylinder heads and blocks. | 5th Jul 1940 | Box 124 \ 2 scan0203 | |
| The investigation of engine inserts, chrome plating, and a test rig for cylinder lubrication. | 5th Jul 1940 | Box 124 \ 2 scan0204 | |
| Testing procedures for cylinder bore wear, oil consumption, and piston ring performance. | 5th Jul 1940 | Box 124 \ 2 scan0205 | |
| Analysis of component wear, including valve material specifications and test results. | 5th Jul 1940 | Box 124 \ 2 scan0206 | |
| Specifications and test data for engine components, including material composition, valves, induction pipes, and carburettors. | 5th Jul 1940 | Box 124 \ 2 scan0207 | |
| Specification table for Vandervell bearings and bushes for the rationalised B.80, B.60, and B.40 engine ranges. | 10th Oct 1939 | Box 124 \ 2 scan0208 | |
| Specification table for various types of piston rings. | 10th Oct 1939 | Box 124 \ 2 scan0209 | |
| Table of dimensions and test results for various engineering components. | 10th Oct 1939 | Box 124 \ 2 scan0210 | |
| Technical table detailing specifications and applications for various pistons. | 10th Oct 1939 | Box 124 \ 2 scan0211 | |
| Table of piston specifications, including dimensions, materials, and remarks. | 13th Jul 1940 | Box 124 \ 2 scan0212 | |
| The mileage, fuel consumption, and modifications for a Cast Iron Engine B.60. | 13th Jul 1940 | Box 124 \ 2 scan0213 | |
| New and altered parts for a B.80 model, compiled under Scheme PL.227. | 3rd Aug 1940 | Box 124 \ 2 scan0214 | |
| Specification revision document detailing parts removed and fitted for a Bentley engine unit. | 4th Aug 1940 | Box 124 \ 2 scan0215 | |
| Specification change document detailing the removal and fitting of cylinder head and rocker cover components. | 7th Aug 1940 | Box 124 \ 2 scan0216 | |
| Specification revision memo for Engine Unit B.60 No.2, detailing changes to components. | 7th Aug 1940 | Box 124 \ 2 scan0217 | |
| Blueprints and drawing alterations for the B.60 Ripplet engine components. | 9th Aug 1940 | Box 124 \ 2 scan0218 | |
| New and existing parts for the 'RIPPLETTS' shackle bracket assembly. | 9th Aug 1940 | Box 124 \ 2 scan0219 | |
| Letter discussing the design and manufacturing of the B-80 engine, with comparisons to other engines. | 10th Aug 1940 | Box 124 \ 2 scan0220 | |
| From RH to Rm confirming the handover of a complete set of parts for B.80 No.6. | 19th Aug 1940 | Box 124 \ 2 scan0221 | |
| Parts for rear spring brackets under sections 6120 and 7030. | 31th May 1940 | Box 124 \ 2 scan0222 | |
| Instructions for fitting a 'DELCO' distributor to a B.60 Number 6 engine, listing required blueprints and parts. | 27th Aug 1940 | Box 124 \ 2 scan0223 | |
| Letter from the British Bundy Tubing Company regarding the supply of Bundylim tubing for external oil pipes. | 28th Aug 1940 | Box 124 \ 2 scan0224 | |
| Requesting an order for various sizes of O.D. tubing from The British Bundy Tubing Co. Ltd. | 20th Aug 1940 | Box 124 \ 2 scan0225 | |
| Letter to The British Bundy Tubing Co. Ltd. confirming the supply of tubing and noting remarks on silver soldering. | 30th Aug 1940 | Box 124 \ 2 scan0226 | |
| Inquiry to The British Bundy Tubing Co. Ltd. about converting experimental engines to use their tubing, requesting specific sizes and a quotation. | 23th Aug 1940 | Box 124 \ 2 scan0227 | |
| Performance and petrol consumption test report comparing Duplex Stromberg and S.U. carburettors on a Bentley Car 11 B.V. | 23th Aug 1940 | Box 124 \ 2 scan0228 | |
| Comparison of fuel consumption figures between Stromberg and 3 S.U. carburettors, including test specifications. | 27th Aug 1940 | Box 124 \ 2 scan0229 | |
| Comparison of engine data for 'Myth' and 'B.60' models, with reference to American engines. | 27th Aug 1940 | Box 124 \ 2 scan0230 | |
| New List of Parts for a Water Pump fitted with a Morgan Stuart Gland and Skefco Ventilated Bearing. | 10th Sep 1940 | Box 124 \ 2 scan0231 | |
| Notification of a gearbox change on a Silver Wraith chassis, fitting a standard Bentley V production overdrive gearbox. | 16th Sep 1940 | Box 124 \ 2 scan0232 | |
| Updates to oil fittings for the B.60 Ripplet to suit a Delco Remy Distributor and PD.439 Wraith Spring Drive. | 30th Sep 1940 | Box 124 \ 2 scan0233 | |
| Confirming the completion of instructions for a rationalised valve gear scheme without grommets. | 30th Sep 1940 | Box 124 \ 2 scan0234 | |
| Requesting an alteration to the B.60 Induction Pipe design RE.147 based on test results. | 4th Oct 1940 | Box 124 \ 2 scan0235 | |
| Camshaft rattle issue in a B.60 Cast Iron Engine and proposing a solution. | 4th Oct 1940 | Box 124 \ 2 scan0236 | |
| B.60 connecting rods required for servicing experimental cars. | 7th Oct 1940 | Box 124 \ 2 scan0237 | |
| Sequence of modifications list for the B.60 & B.80 crankcase and cylinders. | 9th May 1939 | Box 124 \ 2 scan0238 | |
| Index of modifications and specifications for various engine crankcases and cylinders. | 7th Oct 1940 | Box 124 \ 2 scan0239 | |
| Trial of a dirt excluder on B.80 engines, enclosing drawings for a modified flywheel. | 7th Oct 1940 | Box 124 \ 2 scan0240 | |
| Cross-reference memo regarding the Silver Wraith model 30.G.VII. | 9th Oct 1940 | Box 124 \ 2 scan0241 | |
| Requesting modifications to a Damper Flywheel and production of a Locking Cover for a Crankshaft Damper. | 11th Oct 1940 | Box 124 \ 2 scan0242 | |
| Reference note concerning 'Myth Exhaust Valve Tappets', cross-referencing another file. | 3rd Oct 1940 | Box 124 \ 2 scan0243 | |
| Failure of chain drives and proposing a switch to aluminium alloy timing gears for cast iron engines. | 10th Oct 1940 | Box 124 \ 2 scan0244 | |
| Instructions for alterations to a modified Studebaker type crankshaft damper and related components. | 7th Oct 1940 | Box 124 \ 2 scan0245 | |
| Specification revision for Bentley 80 Engine Unit No. 5 for Silver Wraith Chassis 30 G VII. | 9th Oct 1940 | Box 124 \ 2 scan0246 | |
| Specification of a new replacement part for the Water Pump & Fan. | 9th Oct 1940 | Box 124 \ 2 scan0247 | |
| Material test specifications for Cast Aluminium Alloy Timing Gears used on the Lincoln Zephyr. | 9th Oct 1940 | Box 124 \ 2 scan0248 | |
| Specification revision for the gearbox fitted to a Silver Wraith Chassis 30 G VII. | 9th Oct 1940 | Box 124 \ 2 scan0249 | |
| Engine vibration orders, torque components, and reciprocating masses in various engine configurations. | 16th Dec 1940 | Box 124 \ 2 scan0250 | |
| Drawings for the B.80 Marine Engine's crankcase and cylinder components. | 14th Oct 1940 | Box 124 \ 2 scan0251 | |
| Possibility of manufacturing timing gears for cast iron engines. | 16th Oct 1940 | Box 124 \ 2 scan0252 | |
| Specification revision for Bentley V Chassis 9-B-V, Unit B 60 - No. 3, detailing changes to the rear axle and wiring. | 29th Oct 1940 | Box 124 \ 2 scan0253 | |
| List of new drawings and blueprints for the B.80 Alum Engine induction and carburetter system. | 10th Oct 1940 | Box 124 \ 2 scan0254 | |
| Parts list for an air silencer, water return pipe, and petrol feed pipe assemblies. | 30th Sep 1940 | Box 124 \ 2 scan0255 | |
| Oil fittings for the Delco Remy Distributor and Wraith Spring Drive. | 30th Sep 1940 | Box 124 \ 2 scan0256 | |
| Work report on Bentley Chassis 9-B-V detailing the replacement of a gearbox and the fitting of new cam levers. | 9th Oct 1940 | Box 124 \ 2 scan0257 | |
| The addition of new parts for the A.C. Air Silencer under alteration No.194/RE. | 11th Oct 1940 | Box 124 \ 2 scan0258 | |
| Alteration instructions for the RE.289 Rocker cover. | 30th Oct 1940 | Box 124 \ 2 scan0259 | |
| Specification for B80 No. 6 Unit (Cast Iron). | 30th Oct 1940 | Box 124 \ 2 scan0260 | |
| Specifications for engine components including main bearings, crankshaft, connecting rods, and pistons. | 30th Oct 1940 | Box 124 \ 2 scan0261 | |
| List of parts for the cylinder head, valves, fittings, inlet pipe, and carburettor. | 30th Oct 1940 | Box 124 \ 2 scan0262 | |
| List of engine components, their part numbers, and specifications including valve timing. | 30th Oct 1940 | Box 124 \ 2 scan0263 | |
| Typed list of engine components and their associated parts or modifications. | 30th Oct 1940 | Box 124 \ 2 scan0264 | |
| List of components required for a complete Dynamo. | 31th Oct 1940 | Box 124 \ 2 scan0265 | |
| Torsional rigidity and proposing a return to an all-welded construction for eight-cylinder frames. | 31th Oct 1940 | Box 124 \ 2 scan0266 | |
| Drawings for a sodium-filled exhaust valve for B.40, B.60, and B.80 engines. | 5th Nov 1940 | Box 124 \ 2 scan0267 | |
| Feasibility of increasing the inertia of the B.80 crankshaft damper flywheel. | 1st Nov 1940 | Box 124 \ 2 scan0268 | |
| Note detailing the removal of the Bentley 80 No.1 Unit from chassis 4-B-50. | 23th Nov 1940 | Box 124 \ 2 scan0269 | |
| Specification revision for Bentley Unit -B.80.No.6 fitted to chassis 4-B-50, detailing connecting rod changes. | 16th Dec 1940 | Box 124 \ 2 scan0270 | |
| Notification regarding the removal of Bentley 80 No.6 Unit from Bentley Chassis 4-B-50. | 18th Jan 1941 | Box 124 \ 2 scan0271 | |
| Confirming the fitting of a Bentley 80.No.6 Unit to chassis 4-B-50. | 23th Nov 1940 | Box 124 \ 2 scan0272 | |
| Confirming the fitting of the Bentley 80 No.1 Unit to Bentley Chassis 4-B-50. | 18th Jan 1941 | Box 124 \ 2 scan0273 | |
| Specification revision document for a Bentley 80 No. 6 Unit, detailing parts replaced and work carried out. | 12th Aug 1941 | Box 124 \ 2 scan0274 | |
| Record of Dynamo and Ignition Distributor part changes and specifications. | 12th Aug 1941 | Box 124 \ 2 scan0275 | |
| Confirming design agreements for a 16 Horsepower 6 Cylinder engine. | 28th Nov 1940 | Box 124 \ 2 scan0276 | |
| Requirements for an endurance test on a B.60 engine unit. | 17th Dec 1940 | Box 124 \ 2 scan0277 | |
| Report comparing test bed and road results for Cast Iron Engine Units with various configurations. | 17th Dec 1940 | Box 124 \ 2 scan0278 | |
| List of specifications for a tested cylinder head. | 17th Dec 1940 | Box 124 \ 2 scan0279 | |
| Engine performance report detailing issues with a cylinder head, including detonation, ignition timing, and rough running. | 17th Dec 1940 | Box 124 \ 2 scan0280 | |
| Engine road performance tests, focusing on ignition timing, detonation, and governor units. | 17th Dec 1940 | Box 124 \ 2 scan0281 | |
| Test report on the performance and characteristics of the EB.3844 cylinder head. | 17th Dec 1940 | Box 124 \ 2 scan0282 | |
| Engine detonation tests comparing different cylinder heads and compression ratios. | 17th Dec 1940 | Box 124 \ 2 scan0283 | |
| Comparison of performance and engine smoothness between the EB.3844 and Exs.1383 heads. | 17th Dec 1940 | Box 124 \ 2 scan0284 | |
| Test results and comparison of cylinder head EB.4706, noting its performance for slow running, detonation, and compression ratio. | 17th Dec 1940 | Box 124 \ 2 scan0285 | |
| Report comparing the performance of different cylinder heads and experiments to resolve engine 'running on' issues. | 17th Dec 1940 | Box 124 \ 2 scan0286 | |
| Series of engine tuning adjustments and performance test results. | 17th Dec 1940 | Box 124 \ 2 scan0287 | |
| New design for a B.60 & B.80 water pump casing. | 18th Dec 1940 | Box 124 \ 2 scan0288 | |
| Request to the Tracing Office to trace 11 attached drawings and graphs and provide 5 prints of each. | 20th Dec 1940 | Box 124 \ 2 scan0289 | |
| To the Pattern Shop regarding new patterns for a B.60 and B.80 water pump and modifications to an existing pattern. | 3rd Jan 1941 | Box 124 \ 2 scan0290 | |
| Request to produce springs and spring rings for a B.60 and B.80 water pump. | 4th Jan 1941 | Box 124 \ 2 scan0291 | |
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