| Description | Date | Identifier | |
| Confirming a request for crankshaft torsional diagrams to be taken from an 8-cylinder chassis engine. | 3rd Jul 1939 | Box 124 \ 1 scan0184 | |
| The failure of the B.80 No.1 Unit's water pump bearing, spindle, and assembly, part number EB.4206. | 3rd Jul 1939 | Box 124 \ 1 scan0185 | |
| Photograph of a disassembled bearing assembly. | 3rd Jul 1939 | Box 124 \ 1 scan0186 | |
| The arrangement of petrol feed, drain pipes, and a water return pipe for the B.80 engine. | 3rd Jul 1939 | Box 124 \ 1 scan0187 | |
| Test report on the B.80 engine, No. 5 unit, detailing modifications to resolve issues found during testing. | 4th Jul 1939 | Box 124 \ 1 scan0188 | |
| The single belt B.60 engine in a 3.B.50 chassis, specifically the fan and top water connection. | 5th Apr 1939 | Box 124 \ 1 scan0189 | |
| The fitting of water pressure connections to a B.80 No.2 unit. | 6th Jul 1939 | Box 124 \ 1 scan0190 | |
| Requesting details for a stiffened front mounting plate for an experimental 8-cylinder unit. | 6th Jul 1939 | Box 124 \ 1 scan0191 | |
| Distortion test report on a Bentley 60 clutch casing. | 7th Jul 1939 | Box 124 \ 1 scan0192 | |
| Request for blueprints regarding a modification to the cylinder head for a Bentley 60 Chassis. | 7th Jul 1939 | Box 124 \ 1 scan0193 | |
| Removal, modification, and trial of B.60 cylinder heads. | 7th Jul 1939 | Box 124 \ 1 scan0194 | |
| The B.80 and C.I. conventional S-crankshaft with finished forged webs. | 10th Jul 1939 | Box 124 \ 1 scan0195 | |
| Modifications to sheet steel tappet covers for B.60 and B.80 engines. | 10th Jul 1939 | Box 124 \ 1 scan0196 | |
| Requesting the urgent despatch of a dynamo and pulleys to Messrs. Ferodo Ltd. for B.80 belt durability testing. | 10th Jul 1939 | Box 124 \ 1 scan0197 | |
| Development and testing of a pressure cooling system. | 11th Jul 1939 | Box 124 \ 1 scan0198 | |
| Drawing Office instructions for an 8-cylinder high-power aluminum engine unit. | 11th Jul 1939 | Box 124 \ 1 scan0199 | |
| The production of parts for a new 8-cylinder high power aluminum engine unit. | 11th Jul 1939 | Box 124 \ 1 scan0200 | |
| Trial, redesign, and production of B.60 & B.80 valve springs. | 12th Jul 1939 | Box 124 \ 1 scan0201 | |
| Crankshaft torsiograph tests on Engine B.80 No.2. | 12th Jul 1939 | Box 124 \ 1 scan0202 | |
| Parts list and instructions for the B.60 & B.80 Water Pump. | 14th Jul 1939 | Box 124 \ 1 scan0203 | |
| Confirming the order and delivery of various parts, including bearings, for B.60 Chassis PD.429 and PD.439. | 14th Jul 1939 | Box 124 \ 1 scan0204 | |
| Requesting the modification of a Bentley 80 Water Pump to use plain Hoffman bearings. | 18th Jul 1939 | Box 124 \ 1 scan0205 | |
| Instruction to machine .050' from the face of an EXS.1383 head, which is to be supplied by Rm/Wym. | 19th Jul 1939 | Box 124 \ 1 scan0206 | |
| Blueprints for a trial of a Studebaker type crankshaft damper on a Bentley 60 chassis. | 20th Jul 1939 | Box 124 \ 1 scan0207 | |
| Specification sheet for the 5.7 Litre Silver Dawn 80 Hs' Special vehicle. | 21th Jul 1939 | Box 124 \ 1 scan0208 | |
| Specification sheet detailing various engine components and their associated design and remark numbers. | 12th Jul 1939 | Box 124 \ 1 scan0209 | |
| Specification sheet detailing engine components and associated part numbers. | 26th Jun 1939 | Box 124 \ 1 scan0210 | |
| Specification sheet detailing various car components, their design numbers, and remarks. | 7th Mar 1939 | Box 124 \ 1 scan0211 | |
| Specification sheet detailing various automotive components, their design numbers, and remarks. | 12th Jun 1939 | Box 124 \ 1 scan0212 | |
| Specification sheet No. 6, issue No. 1, detailing various vehicle components. | 26th May 1939 | Box 124 \ 1 scan0213 | |
| Specification sheet listing vehicle parts with corresponding design and list of parts numbers. | 26th May 1939 | Box 124 \ 1 scan0214 | |
| Specification sheet listing parts with their descriptions, design numbers, and remarks. | 26th May 1939 | Box 124 \ 1 scan0215 | |
| Specification sheet listing various parts including tools, wheel carriers, starter motor, and dynamo components. | 26th May 1939 | Box 124 \ 1 scan0216 | |
| Specification sheet listing various automotive components and their associated numbers. | 24th Jul 1939 | Box 124 \ 1 scan0217 | |
| Request for a sketch to modify the B.80 rocker cover due to a shrinking sealing washer. | 24th Jul 1939 | Box 124 \ 1 scan0218 | |
| Torsional vibration tests performed on the B.80 No.2 engine, comparing different dampers. | 24th Jul 1939 | Box 124 \ 1 scan0219 | |
| Analysis of vibration test results concerning damper settings, inertia, stiffness, and backlash on crankshafts and camshafts. | 24th Jul 1939 | Box 124 \ 1 scan0220 | |
| Comparison of the performance and reliability of Studebaker and B.80 dampers. | 24th Jul 1939 | Box 124 \ 1 scan0221 | |
| Comparative analysis of Buick, Cadillac, and Studebaker dampers, focusing on inertia and resonance. | 24th Jul 1939 | Box 124 \ 1 scan0222 | |
| Comparative analysis of dampers from Buick, Cadillac, and Studebaker for the B.80 engine. | 24th Jul 1939 | Box 124 \ 1 scan0223 | |
| Graph showing the results of torsional vibration tests on a B.80 No. 2 engine, fitted with a Cadillac damper. | 20th Jul 1938 | Box 124 \ 1 scan0224 | |
| Graph plotting the results of torsional vibration tests on a B.80 No 2 Buick damper. | 20th Jul 1939 | Box 124 \ 1 scan0225 | |
| Graph comparing torsional vibration test results for a Buick Damper and a B.80 Damper on a B.80 No. 2 engine. | 20th Jul 1939 | Box 124 \ 1 scan0226 | |
| Graph showing the results of torsional vibration tests on a B.80 No. 2 engine with a Buick laminated damper. | 10th Jul 1939 | Box 124 \ 1 scan0227 | |
| Graph plotting torsional vibration tests on a B.80 No.2 engine, comparing a B.80 damper with a Studebaker damper. | 20th Jul 1939 | Box 124 \ 1 scan0228 | |
| Graph plotting torsional vibration tests on a B.80 No.2 engine, using a Studebaker damper with increased inertia and different rubber hardnesses. | 22th Jun 1934 | Box 124 \ 1 scan0229 | |
| Graph plotting torque against angular deflection to show the torsional stiffness of a Studebaker damper for different rubber types. | 28th Jun 1937 | Box 124 \ 1 scan0230 | |
| Graph plotting torsional vibration test results from a B.80 No. 2 engine camshaft. | 29th Jun 1939 | Box 124 \ 1 scan0231 | |
| Graph showing the results of torsional vibration tests on a B.80 No.2 engine, comparing the crankshaft and camshaft. | 9th Jul 1929 | Box 124 \ 1 scan0232 | |
| Graph showing the results of torsional vibration tests on a B.80 No. 2 damper. | 8th Jul 1939 | Box 124 \ 1 scan0233 | |
| Graph of torsional vibration tests on a B.80 No. 2 engine with different damper settings. | 28th Jun 1939 | Box 124 \ 1 scan0234 | |
| Modification to the Bentley 6C chassis cylinder head to improve slow running. | 27th Jul 1939 | Box 124 \ 1 scan0235 | |
| Request for blueprints and instructions for modifications to water pump components for a Bentley 80 Chassis. | 27th Jul 1939 | Box 124 \ 1 scan0236 | |
| Parts list for a Humber Snipe type crankshaft damper trial on a Bentley 60 chassis. | 4th Aug 1939 | Box 124 \ 1 scan0237 | |
| The ordering of a crankshaft damper from Pickford's for the Humber Snipe. | 11th Aug 1939 | Box 124 \ 1 scan0238 | |
| Requesting modifications to a B.60 cylinder head for further development and urgent testing. | 11th Aug 1939 | Box 124 \ 1 scan0239 | |
| Order for cheaper, extruded exhaust valves and their material composition for trial on B.60 & B.80 engines. | 12th Aug 1939 | Box 124 \ 1 scan0240 | |
| Modification to the crankshaft damper for the Bentley 80 Chassis. | 12th Aug 1939 | Box 124 \ 1 scan0241 | |
| The failure of the No.2 Inlet Rocker on the B.80 No.4 Unit. | 15th Aug 1939 | Box 124 \ 1 scan0242 | |
| Photograph of a cast metal rocker arm, part number F67047, and a smaller related component. | 19th Aug 1939 | Box 124 \ 1 scan0243 | |
| Specifying the flywheel and clutch assembly for R.80 Units No. 9 & 10. | 19th Aug 1939 | Box 124 \ 1 scan0244 | |
| The failure of a Morse chain during an endurance test on a B.60 chain-driven camshaft unit. | 21th Aug 1939 | Box 124 \ 1 scan0245 | |
| Photograph of a chain driven camshaft with failure test results. | 21th Aug 1939 | Box 124 \ 1 scan0246 | |
| Blueprints for a 'Studebaker' type crankshaft damper and fan pulley studs for a Bentley 80 Chassis. | 21th Aug 1939 | Box 124 \ 1 scan0247 | |
| Clarifying the order of precedence for various B.80 water pump projects. | 21th Aug 1939 | Box 124 \ 1 scan0248 | |
| Request to manufacture a B.80 fan with blades twisted to give a zero blade angle at the tip. | 22th Aug 1939 | Box 124 \ 1 scan0249 | |
| Design alterations for an induction system using a Stromberg twin downdraught carburetter. | 23th Aug 1939 | Box 124 \ 1 scan0250 | |
| Development of carburettors and the creation of drawings for modified parts. | 23th Aug 1939 | Box 124 \ 1 scan0251 | |
| Request for a quotation for two petrol engine driven alternator sets for the L.M. & S. Railway special saloons. | 15th Aug 1939 | Box 124 \ 1 scan0252 | |
| Extract from a specification detailing requirements for petrol engine-driven alternator sets. | 15th Aug 1939 | Box 124 \ 1 scan0253 | |
| Specification sheet detailing requirements for an engine's rating, governor, fuel pump, starting equipment, ignition, and cooling system. | 15th Aug 1939 | Box 124 \ 1 scan0254 | |
| Specification document outlining requirements for a railway coach engine's cooling, exhaust, finish, and drawings. | 15th Aug 1939 | Box 124 \ 1 scan0255 | |
| Performance graph for a B60 4.25-litre engine with a 7.0:1 compression ratio. | 15th Aug 1939 | Box 124 \ 1 scan0256 | |
| Performance graph for a B60 4 1/4 Litre engine with a 7.0:1 compression ratio. | 29th Aug 1939 | Box 124 \ 1 scan0257 | |
| Design and experimental instruction for an induction system for Stromberg Duplex Downdraught Carburetters. | 29th Aug 1939 | Box 124 \ 1 scan0258 | |
| Alterations to the throttle control and return spring for the B.80 engine when fitting a new induction pipe. | 1st Sep 1939 | Box 124 \ 1 scan0259 | |
| Converting a B.60 No.3 Unit to a chain drive camshaft and obtaining a spare driving chain. | 13th Oct 1939 | Box 124 \ 1 scan0260 | |
| Comparing the performance of different starter motors for the B.80 engine under cold conditions. | 20th Oct 1939 | Box 124 \ 1 scan0261 | |
| Outlining tests and comparisons of induction systems for 6 cylinder cast iron engines. | 31th Oct 1939 | Box 124 \ 1 scan0262 | |
| Requesting data on time and cost savings for B.60 Rocker covers compared to the Wraith model. | 27th Nov 1939 | Box 124 \ 1 scan0263 | |
| Outlining two potential methods for fitting a tachometer drive to the B60 engine. | 27th Nov 1939 | Box 124 \ 1 scan0264 | |
| Note foreseeing limitations with the means of hobbing a spiral gear situated between two cams. | 27th Nov 1939 | Box 124 \ 1 scan0265 | |
| Reporting the failure of a chain during endurance testing. | 27th Nov 1939 | Box 124 \ 1 scan0266 | |
| Torsional vibration tests performed on B.60 chain drive units with various dampers. | 27th Nov 1939 | Box 124 \ 1 scan0267 | |
| Analysis of low-frequency engine vibration, its potential causes, and recommendations for further investigation using different instruments. | 27th Nov 1939 | Box 124 \ 1 scan0268 | |
| Graph comparing the performance of different engine damper configurations based on amplitude and RPM. | 28th Nov 1939 | Box 124 \ 1 scan0269 | |
| Retaining the rev counter for 8 and 6-cylinder Bentley engines. | 28th Nov 1939 | Box 124 \ 1 scan0270 | |
| Faults experienced with B.60 and B.80 units on the test bed, specifically concerning oil leaks from side tappet covers. | 28th Nov 1939 | Box 124 \ 1 scan0271 | |
| Technical memorandum discussing issues with crankcase oil level dipsticks and oil leaks from rocker cover joints. | 28th Nov 1939 | Box 124 \ 1 scan0272 | |
| Proposed design for die-cast rocker covers with a continuous groove. | 28th Nov 1939 | Box 124 \ 1 scan0273 | |
| Endurance testing and standardization of a chain drive. | 29th Nov 1939 | Box 124 \ 1 scan0274 | |
| Test report on the B.60 chain-driven camshaft unit, detailing observations and an endurance schedule. | 30th Nov 1939 | Box 124 \ 1 scan0275 | |
| Engine endurance testing, detailing component failures and subsequent modifications. | 30th Nov 1939 | Box 124 \ 1 scan0276 | |
| Engine component failures, analyzing chain breakages, bearing seizures, and an unsound damper design. | 30th Nov 1939 | Box 124 \ 1 scan0277 | |
| Power curve graph for the B.60 No. 1 engine with a chain-driven camshaft, showing BMEP, BHP, and back pressure against engine RPM. | 22th Aug 1939 | Box 124 \ 1 scan0278 | |
| Graph comparing the performance of various engine dampers at different engine speeds. | 30th Nov 1939 | Box 124 \ 1 scan0279 | |
| From Rm to HPS requesting the completion of five essential parts required for ongoing tests. | 30th Nov 1939 | Box 124 \ 1 scan0280 | |
| Urging the completion and fitting of a flexible coupling for the No.5 Test House. | 30th Nov 1939 | Box 124 \ 1 scan0281 | |
| New pattern for a 3 1/4-bore 6-cylinder engine with provisions for a 3 3/4-bore unit. | 6th Dec 1939 | Box 124 \ 1 scan0282 | |
| Design and limitations of the tachometer drive for B.60 & B.80 models. | 8th Dec 1939 | Box 124 \ 1 scan0283 | |
| | | | |
