| Description | Date | Identifier | |
| Torsional oscillation test results for a B.80 No.3 engine with a 2.75 diameter shaft and no damper. | 29th Mar 1939 | Box 124 \ 1 scan0082 | |
| Main dimensions of a B.80 crank-throw. | 21th Apr 1939 | Box 124 \ 1 scan0083 | |
| Request to arrange for the production of dies for eight-cylinder engine crankshaft forgings. | 26th Apr 1939 | Box 124 \ 1 scan0084 | |
| Requesting a modification to a Bentley 80 induction pipe hot spot. | 27th Apr 1939 | Box 124 \ 1 scan0085 | |
| Blueprint of a water hot spot on a B.80 induction pipe, with a proposed welded sheet aluminium water jacket. | 27th Apr 1939 | Box 124 \ 1 scan0086 | |
| Suggestion that a spring drive could reduce gear rattle on crankshafts, making the damper more effective. | 27th Apr 1939 | Box 124 \ 1 scan0087 | |
| Torsional oscillation tests on a B.60 No.4 engine fitted with a Wraith spring drive. | 28th Apr 1939 | Box 124 \ 1 scan0088 | |
| Graph comparing engine vibration amplitude against RPM for different spring drive and damper configurations. | 22th Apr 1939 | Box 124 \ 1 scan0089 | |
| Secret report on tests of a high-power cast iron engine unit and its performance compared to the standard Wraith. | 28th Apr 1939 | Box 124 \ 1 scan0090 | |
| Performance tests for cars 28.G.VI & 29.G.VI at Brooklands, comparing different carburettor and exhaust configurations. | 29th Apr 1939 | Box 124 \ 1 scan0091 | |
| Report comparing oil temperatures over consecutive laps for different car configurations, including sheet metal and aluminium bottom halves. | 29th Apr 1929 | Box 124 \ 1 scan0092 | |
| The durability of a Cast Iron engine unit after 4,300 miles of road and track testing, including at Brooklands. | 29th Apr 1939 | Box 124 \ 1 scan0093 | |
| Preliminary road test results for a 30.G.VII vehicle fitted with an 8-cylinder high power engine. | 28th Apr 1939 | Box 124 \ 1 scan0094 | |
| Trial of a car with an 8-Cylinder High Power Unit and arranging a future chassis meeting. | 28th Apr 1939 | Box 124 \ 1 scan0095 | |
| Modifications to the specifications for B.60 and B.80 engine units. | 2nd May 1939 | Box 124 \ 1 scan0096 | |
| Confirming that instructions for detailing work on the Aluminium Straight 8 Engine have not yet been passed on. | 3rd May 1939 | Box 124 \ 1 scan0097 | |
| Comparative water temperature tests between two Wraith cars, one fitted with a cast iron engine. | 3rd May 1939 | Box 124 \ 1 scan0098 | |
| Requesting schemes and detail drawings for new 8-cylinder engine units. | 4th May 1939 | Box 124 \ 1 scan0099 | |
| The design of the induction system for the Bentley 60, featuring 1.750' S.U. carburetters. | 5th May 1939 | Box 124 \ 1 scan0100 | |
| The shortened front end of the frame for a B.60 Engine, Silver Ripple II. | 10th May 1939 | Box 124 \ 1 scan0101 | |
| List of Parts (LOP) for the Bentley B.80 engine inlet pipe section. | 12th May 1939 | Box 124 \ 1 scan0102 | |
| The cancellation of a mock-up design (PD.429) for the B.60 slipper spring drive in favour of a new scheme. | 12th May 1939 | Box 124 \ 1 scan0103 | |
| Modifications to a B.60 cylinder head following completed tests. | 13th May 1939 | Box 124 \ 1 scan0104 | |
| The conversion and modification of the B.60 crankcase pattern. | 15th May 1939 | Box 124 \ 1 scan0105 | |
| Drawings for the Exhaust Manifold and Downtake, and a desire to proceed with testing. | 16th May 1939 | Box 124 \ 1 scan0106 | |
| Valve spring failures and modifications for B.60 and B.80 engines. | 16th May 1939 | Box 124 \ 1 scan0107 | |
| B.60 engine's Wraith damper, spring drive, and a single belt drive experiment. | 16th May 1939 | Box 124 \ 1 scan0108 | |
| Urgent request to complete one of four B.60 crankshafts to a specific drawing to suit a harmonic damper. | 17th May 1939 | Box 124 \ 1 scan0109 | |
| Specification for six experimental Bentley 80 block and crank cases from the Iron Foundry, detailing their material compositions. | 18th May 1939 | Box 124 \ 1 scan0110 | |
| Responding to queries about the 8-cylinder engine, detailing patterns and castings. | 18th May 1939 | Box 124 \ 1 scan0111 | |
| Specification memo for the flywheel and clutch of the Conventional 'S' No.1 Unit. | 18th May 1939 | Box 124 \ 1 scan0112 | |
| Summary report on the strip examination of a B.80 No.3 Unit engine following an endurance test. | 20th May 1939 | Box 124 \ 1 scan0113 | |
| Inspection report detailing the condition of various engine components and their associated measurements. | 20th May 1939 | Box 124 \ 1 scan0114 | |
| Photographic record of B.80 No.3 Unit big end bearings after endurance testing. | 20th May 1939 | Box 124 \ 1 scan0115 | |
| Engine main bearings laid out for inspection following a 105-hour endurance test. | 20th May 1939 | Box 124 \ 1 scan0116 | |
| Test report detailing the dimensional measurements of main bearings and a crankshaft before and after a 50-hour test run. | 20th May 1939 | Box 124 \ 1 scan0117 | |
| Cylinder bore dimension measurements before and after a 50-hour test for unit B.80 No. 3. | 20th May 1939 | Box 124 \ 1 scan0118 | |
| Test report detailing connecting rod bearing and crankpin dimension measurements for a B80 Unit Nº 3 after a 50 hour run. | 20th May 1939 | Box 124 \ 1 scan0119 | |
| Piston profile measurements for unit B.80 Nº3, identification M.30, before and after a 50-hour running test on Aerolite tin coated EB.3916 pistons. | 20th May 1939 | Box 124 \ 1 scan0120 | |
| Test report on valve dimensions for a B.80 unit after a 50-hour engine run. | 22th May 1939 | Box 124 \ 1 scan0121 | |
| New drawings and part changes for the Bentley 80 Engine. | 22th May 1939 | Box 124 \ 1 scan0122 | |
| Experimental modifications for an 8-cylinder engine. | 22th May 1939 | Box 124 \ 1 scan0123 | |
| The B.80 No.3 Unit 50-hour endurance test, including its detailed specification. | 22th May 1939 | Box 124 \ 1 scan0124 | |
| Endurance test conditions specifying timings, RPM, loads, fuel, and oil parameters. | 22th May 1939 | Box 124 \ 1 scan0125 | |
| Running record and consumption report for an engine test, detailing power output and fuel usage. | 22th May 1939 | Box 124 \ 1 scan0126 | |
| Valve tappet clearance and crankshaft damper failures and testing. | 22th May 1939 | Box 124 \ 1 scan0127 | |
| Engine component endurance tests, covering the crankshaft damper, valve springs, dynamo, belt drive, and electrical system. | 22th May 1939 | Box 124 \ 1 scan0128 | |
| Inspection report on the general condition of engine parts after a period of running. | 22th May 1939 | Box 124 \ 1 scan0129 | |
| The 50-hour bench endurance run of an 8-cylinder engine. | 23th May 1939 | Box 124 \ 1 scan0130 | |
| Requesting the completion of detailing and production of two Studebaker dampers for the B.80 unit, as the original cannot be sourced. | 24th May 1939 | Box 124 \ 1 scan0131 | |
| Specifications for belt and pulley angles on B.60 and B.80 engines. | 25th May 1939 | Box 124 \ 1 scan0132 | |
| Specifications and a request for the production of two sets of dynamo pulleys. | 25th May 1939 | Box 124 \ 1 scan0133 | |
| Instruction memo regarding a stud for the rocker cover on a Bentley 60 Chassis High Power Head. | 31th May 1939 | Box 124 \ 1 scan0134 | |
| Blueprints for a Bentley 60 Chassis cylinder head. | 1st Jun 1939 | Box 124 \ 1 scan0135 | |
| Parts list and blueprint request for a Bentley 60 chassis water pump. | 2nd Jun 1939 | Box 124 \ 1 scan0136 | |
| The modification of a B.60 cylinder head by machining away the turbulent lip. | 5th Jun 1939 | Box 124 \ 1 scan0137 | |
| Scheme for variable pitch fan pulleys to reduce excessive fan noise on W.80 and B.80 engines. | 6th Jun 1939 | Box 124 \ 1 scan0138 | |
| Parts and requesting prints for a modified crankcase breather pipe for the Bentley 60 test car. | 6th Jun 1939 | Box 124 \ 1 scan0139 | |
| Instructions to correct a mistake regarding the detailing of the Alum 80 engine, with new guidance on crankcase patterns and cylinder heads. | 6th Jun 1939 | Box 124 \ 1 scan0140 | |
| Technical notes regarding cylinder head tests, camshaft bearings, and standard pistons for an Alum engine. | 6th Jun 1939 | Box 124 \ 1 scan0141 | |
| Increase in oil pressure for B.60 & B.80 models by modifying the main oil pressure spring. | 7th Jun 1939 | Box 124 \ 1 scan0142 | |
| Request to design an adaption for a Cadillac-type bonded rubber damper for the B.80 engine. | 7th Jun 1939 | Box 124 \ 1 scan0143 | |
| Required work for an 'Unconventional' Aluminium 8 Cylinder Engine with a 3.250 bore. | 9th Jun 1939 | Box 124 \ 1 scan0144 | |
| Instructions for a modification to a cylinder head for a Bentley 60 Chassis. | 12th Jun 1939 | Box 124 \ 1 scan0145 | |
| Request to produce two induction pipes with a 1.500 inch diameter bore for the B.80 induction system. | 12th Jun 1939 | Box 124 \ 1 scan0146 | |
| Request to redesign the water pump for B.60 and B.80 engines to incorporate a fan drive and heater connections. | 12th Jun 1939 | Box 124 \ 1 scan0147 | |
| Request for parts to build a test rig for a Bentley B.80 triangle belt drive. | 12th Jun 1939 | Box 124 \ 1 scan0148 | |
| The supply of a dynamo and pulleys for a Bentley 80 Pulley rig and for belt testing by Messrs. Ferodo. | 14th Jun 1939 | Box 124 \ 1 scan0149 | |
| Failure report concerning a No.1 Inlet Rocker, part number EB.4731. | 14th Jun 1939 | Box 124 \ 1 scan0150 | |
| Design considerations for exhaust valve seats and guides for an 8-cylinder engine. | 14th Jun 1939 | Box 124 \ 1 scan0152 | |
| Request for blueprints and a list of required parts for the Bentley 80 Chassis crankshaft damper. | 14th Jun 1939 | Box 124 \ 1 scan0153 | |
| Request to manufacture two core plugs with pressure tubes for a B.60 head and block. | 14th Jun 1939 | Box 124 \ 1 scan0154 | |
| Distortion test conducted on a Bentley 60 clutch casing. | 15th Jun 1939 | Box 124 \ 1 scan0155 | |
| Blueprint diagram showing stiffening webs welded onto a Bentley 6D clutch casing. | 15th Jun 1939 | Box 124 \ 1 scan0156 | |
| Test report on the deflection of a Bentley 60 clutch casing under a 500lb load. | 15th Jun 1939 | Box 124 \ 1 scan0157 | |
| Diagram illustrating stiffening webs welded onto a Bentley 60 clutch casing to correct deflection. | 15th Jun 1939 | Box 124 \ 1 scan0158 | |
| Deflection test report for a Bentley 60 clutch casing under a 500 LB load. | 15th Jun 1939 | Box 124 \ 1 scan0159 | |
| Request to design softer front springs for W.80 and B.80 models, including weight and load specifications. | 16th Jun 1939 | Box 124 \ 1 scan0160 | |
| The detailing and ordering of springs. | 16th Jun 1939 | Box 124 \ 1 scan0161 | |
| Design modification to an induction manifold with a cast-in starter passage. | 17th Jun 1939 | Box 124 \ 1 scan0162 | |
| Experimental lighter rear suspension for a 6-cylinder C.I. engine. | 19th Jun 1939 | Box 124 \ 1 scan0163 | |
| Increase in the number of instruction sets for the Bentley 80 chassis crankshaft damper. | 20th Jun 1939 | Box 124 \ 1 scan0164 | |
| Clarifying the urgent parts required for the B.80 Water Pump Rig. | 23th Jun 1939 | Box 124 \ 1 scan0165 | |
| Weight analysis summary and performance details for an 8-cylinder engine. | 23th Jun 1939 | Box 124 \ 1 scan0166 | |
| Power curve graph for the B.80 8-cylinder engine with open exhaust, plotting BHP, Torque, and MEP against RPM. | 24th Jun 1939 | Box 124 \ 1 scan0167 | |
| Request to place an official order for an experimental belt from Ferodo Ltd. | 24th Jun 1939 | Box 124 \ 1 scan0168 | |
| Requesting blueprints for a crankshaft damper and pulley for a Bentley 80 chassis. | 27th Jun 1939 | Box 124 \ 1 scan0169 | |
| Analysis of unvapourised fuel surging in the Induction System B.80 No.5 Unit at low speeds. | 28th Jun 1939 | Box 124 \ 1 scan0170 | |
| Improving heat transfer to induction pipes and modifications to manifolds and carburetors. | 28th Jun 1939 | Box 124 \ 1 scan0171 | |
| The production of 6 and 8 cylinder engine castings and a new induction pipe design for a B.80 engine. | 28th Jun 1939 | Box 124 \ 1 scan0172 | |
| Design changes for strengthened front engine support feet for the B.80 and C.I. Conventional 8. | 28th Jun 1939 | Box 124 \ 1 scan0173 | |
| The test bed running and specifications for B.80 Unit No. 5 after a 30,000-mile test. | 29th Jun 1939 | Box 124 \ 1 scan0174 | |
| Engine power output, detonations, and oil consumption with 'Blow By' analysis. | 29th Jun 1939 | Box 124 \ 1 scan0175 | |
| Valve bounce tests comparing Ph.III and EB.4678/9 springs and proposing alternatives. | 29th Jun 1939 | Box 124 \ 1 scan0176 | |
| Engine valve bounce, induction system, and slow running performance issues. | 29th Jun 1939 | Box 124 \ 1 scan0177 | |
| The performance and investigation of timing gears, dampers, and camshafts. | 29th Jun 1939 | Box 124 \ 1 scan0178 | |
| Issues and solutions for various engine leaks and joints. | 29th Jun 1939 | Box 124 \ 1 scan0179 | |
| Exhaust manifold failures and the condition of stripped engine components, including bearings. | 29th Jun 1939 | Box 124 \ 1 scan0180 | |
| Graph of power comparisons on a B80 N°5 unit engine after 30,000 miles, testing an open exhaust against a Buick silencer. | 30th Jun 1939 | Box 124 \ 1 scan0181 | |
| Specifications for the construction and testing of a Wraith 80 bump chassis. | 30th Jun 1939 | Box 124 \ 1 scan0183 | |
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