| Description | Date | Identifier | |
| Request for a scheme and drawings for a roller chain alternative for the B.60 Camshaft Drive. | 21th Mar 1940 | Box 124 \ 2 scan0092 | |
| Requesting a detailed drawing for a 3 1/4' bore dry liner aluminium engine. | 21th Mar 1940 | Box 124 \ 2 scan0093 | |
| The production of castings for B.40 and 2-cylinder engines, listing the available patterns. | 27th Mar 1940 | Box 124 \ 2 scan0094 | |
| Advice note from The Pattern & Model Manufacturing Co. detailing the despatch of patterns and coreboxes for an H8 Engine. | 18th Mar 1940 | Box 124 \ 2 scan0095 | |
| Copy of an advice note from a supplier detailing despatched patterns and moulding box parts. | 18th Mar 1940 | Box 124 \ 2 scan0096 | |
| Advice note from The Pattern & Model Manufacturing Co detailing dispatched patterns and coreboxes for engine components. | 18th Mar 1940 | Box 124 \ 2 scan0097 | |
| Request to redesign the B.60 Camwheel to have a lower moment of inertia, comparing it to a Studebaker wheel. | 28th Mar 1940 | Box 124 \ 2 scan0098 | |
| Design of controls for the B.60 engine and modifications to its carburetter. | 29th Mar 1940 | Box 124 \ 2 scan0099 | |
| Clarifying the requirement to fit the petrol feed pipe in addition to the engine controls. | 29th Mar 1940 | Box 124 \ 2 scan0100 | |
| The distribution of blueprints for a Lucas Dynamo Mounting and an experimental bracket. | 29th Mar 1940 | Box 124 \ 2 scan0101 | |
| Addition of a pipe for timing gear lubrication on engine oil fittings. | 29th Mar 1940 | Box 124 \ 2 scan0102 | |
| Blueprints for the RE.692 camshaft for the B.80 Aluminium Engine. | 29th Mar 1940 | Box 124 \ 2 scan0103 | |
| Despatch instruction for 3 oil coolers to be sent to Messrs Wilmot Breedon & Co. Ltd. for examination. | 29th Mar 1940 | Box 124 \ 2 scan0104 | |
| Instruction to replace the balance weights and rebalance the crankshaft for a B.60 No. 2 engine. | 30th Mar 1940 | Box 124 \ 2 scan0105 | |
| Request to replace the balance weights and rebalance the crankshaft for the B.60 No.2 engine. | 30th Mar 1940 | Box 124 \ 2 scan0106 | |
| The rationalisation of cast-iron engines, including cancellations and conversions for marine use. | 30th Mar 1940 | Box 124 \ 2 scan0107 | |
| Modifying a list of engine units, dividing them into categories and specifying their purpose. | 1st Apr 1940 | Box 124 \ 2 scan0108 | |
| Engine specifications, production plans, and component storage for future development. | 1st Apr 1940 | Box 124 \ 2 scan0109 | |
| Order for 24 rubber bushes to be sent to The British Tyre & Rubber Co. Ltd. | 30th Mar 1940 | Box 124 \ 2 scan0110 | |
| Request to The British Tyre & Rubber Co. Ltd. for the production of 24 rubber bushes to a specific hardness. | 30th Mar 1940 | Box 124 \ 2 scan0111 | |
| Design error in the B.80 throttle opening controls, attributing it to a new draughtsman's incorrect methodology. | 2nd Apr 1940 | Box 124 \ 2 scan0112 | |
| Letter from British Tyre & Rubber Co. Ltd. confirming the manufacture of 24 Rubber Buffers. | 2nd Apr 1940 | Box 124 \ 2 scan0113 | |
| Experimental use of a Reynolds chain driven camshaft to replace the existing Morse chain. | 2nd Apr 1940 | Box 124 \ 2 scan0114 | |
| Alteration note for the RE 466 Crankcase & Cylinders Lop, replacing the Tappet Cover. | 4th Apr 1940 | Box 124 \ 2 scan0115 | |
| Modifications to a Studebaker damper for the B80 engine. | 5th Apr 1940 | Box 124 \ 2 scan0116 | |
| Simplified throttle controls for the B.60 Twin Stromberg engine, including modifications to the induction pipe. | 5th Apr 1940 | Box 124 \ 2 scan0117 | |
| Electrical units required for the B.40 Engine No.1. | 6th Apr 1940 | Box 124 \ 2 scan0118 | |
| Alteration note for B40 engine crankshaft parts, detailing component additions, deletions, and dimensional changes. | 6th Apr 1940 | Box 124 \ 2 scan0119 | |
| Alteration note for a H.T. ignition wire tube bracket due to a drawing office error. | 9th Apr 1940 | Box 124 \ 2 scan0120 | |
| Sending two new blueprints for a Humber Type Damper. | 9th Apr 1940 | Box 124 \ 2 scan0121 | |
| Blueprints for a new cast iron fan pulley to replace a sheet metal one on the B 40 Engine crankshaft. | 9th Apr 1940 | Box 124 \ 2 scan0122 | |
| Dispatch of blueprints for B.80 Alum Engine components. | 9th Apr 1940 | Box 124 \ 2 scan0123 | |
| Requesting modification of the camwheel for the B.60 No.1 engine. | 10th Apr 1940 | Box 124 \ 2 scan0124 | |
| Alteration document detailing the added width of camshaft bosses for the crankcase and cylinders. | 10th Apr 1940 | Box 124 \ 2 scan0125 | |
| Alteration notice for the inside diameter of fan blades on a Pulley & Fan Dynamo. | 11th Apr 1940 | Box 124 \ 2 scan0126 | |
| Analysis of the B60 Camshaft Drive, calculating the safe working load for a fabroil gear and discussing a previous chain drive failure. | 12th Apr 1940 | Box 124 \ 2 scan0127 | |
| Analysis of different timing drive schemes for the B60 engine, including metal gears, chain drive, and Wraith spring drive. | 15th Apr 1940 | Box 124 \ 2 scan0128 | |
| Confusion regarding detail drawings for aluminium engines and an urgent request for updates. | 15th Apr 1940 | Box 124 \ 2 scan0129 | |
| Providing information and test data for the B.60 and PL.72 crankshafts. | 15th Apr 1940 | Box 124 \ 2 scan0130 | |
| Updating progress on a 3.5-inch bore liner crankcase and drawings for an 8-cylinder 'Alum' engine. | 16th Apr 1940 | Box 124 \ 2 scan0131 | |
| Tests investigating the effect of reducing crankshaft inertia on torsional vibration frequency on a B.60 engine. | 17th Apr 1940 | Box 124 \ 2 scan0132 | |
| Continuation of a memo discussing engine vibration, critical speed, and the effect of balance weights. | 29th Mar 1940 | Box 124 \ 2 scan0133 | |
| Graph plotting amplitude against crankshaft RPM for a Wraith spring drive without a slipper or balance weights. | 29th Mar 1940 | Box 124 \ 2 scan0134 | |
| Graph of amplitude in degrees versus crankshaft RPM for a Wraith spring drive without slipper, with a balance weight. | 1st Apr 1940 | Box 124 \ 2 scan0135 | |
| Graph showing amplitude tests for a Wraith Spring Drive operating without balance weights. | 2nd Apr 1940 | Box 124 \ 2 scan0136 | |
| Graph plotting amplitude in degrees against engine RPM for the Wraith Spring Drive. | 2nd Apr 1940 | Box 124 \ 2 scan0137 | |
| Blueprint showing 9th harmonic torsiograms for a Wraith spring drive, with and without balance weights. | 5th Apr 1940 | Box 124 \ 2 scan0138 | |
| Modifications and pattern updates for the B.80 Alum Unit engine. | 19th Apr 1940 | Box 124 \ 2 scan0139 | |
| Clarifying the correct camshaft usage for the Ripplet engine crankcase and cylinders. | 19th Apr 1940 | Box 124 \ 2 scan0140 | |
| Blueprints for an 8-cylinder alum engine flywheel, noting an inability to complete the scheme due to lack of chassis information. | 23th Apr 1940 | Box 124 \ 2 scan0141 | |
| Instructions and blueprints for B.80 Aluminium Cylinder Head components. | 24th Apr 1940 | Box 124 \ 2 scan0142 | |
| The installation of two S.U. carburettors on a B.60 engine, discussing throttle controls and fire risk testing. | 24th Apr 1940 | Box 124 \ 2 scan0143 | |
| Drawings and instructions for a B.60 crankshaft assembly using Welsh washers and a Humber damper. | 24th Apr 1940 | Box 124 \ 2 scan0144 | |
| The latest design changes for a cheaper production B.60 crankshaft. | 25th Apr 1940 | Box 124 \ 2 scan0145 | |
| Requesting the preparation of shafts for testing and a comparative report on a new crank. | 25th Apr 1940 | Box 124 \ 2 scan0146 | |
| Design and testing of B.80 Stromberg Carburetter Controls. | 25th Apr 1940 | Box 124 \ 2 scan0147 | |
| Temporary measure due to a stock shortage of copper pipe. | 26th Apr 1940 | Box 124 \ 2 scan0148 | |
| Resolving a design conflict by re-arranging engine controls for the swinging arm clutch operation. | 30th Apr 1940 | Box 124 \ 2 scan0149 | |
| Throttle controls for the rationalised senior range of cars with B.60 or B.80 engines. | 30th Apr 1940 | Box 124 \ 2 scan0150 | |
| Specifications for a B.80 Induction Pipe, including its size, connections, and suggested improvements. | 30th Apr 1940 | Box 124 \ 2 scan0151 | |
| Sending blueprints for Water Pump and Fan LOP's for B.60 and B.80 engines, with notes on design changes and experimental drawings. | 30th Apr 1940 | Box 124 \ 2 scan0152 | |
| Adaptation of a Vauxhall '25' water pump for a B.60 engine, including a list of required parts. | 1st May 1940 | Box 124 \ 2 scan0153 | |
| Required modification to a pump body and comparing pump speed ratios and rotor diameters with a Vauxhall unit. | 1st May 1940 | Box 124 \ 2 scan0154 | |
| The distribution of blueprints for updated B.30 Alum camshafts. | 1st May 1940 | Box 124 \ 2 scan0155 | |
| Listing blueprints for the B.80 3.5 Bore Aluminium engine, detailing components for the crankcase, cylinders, valves and fittings. | 1st May 1940 | Box 124 \ 2 scan0156 | |
| Identical LOP's for the Water Pump & Fan for Bentley 60 and 80 units, requesting clarification on which to use and which to cancel. | 2nd May 1940 | Box 124 \ 2 scan0157 | |
| Instructions for fitting Humber dampers on B.60 engines, specifying parts and friction load. | 4th May 1940 | Box 124 \ 2 scan0158 | |
| Distributing blueprints for a modified wheelcase for B.40 & B.60 engines. | 7th May 1940 | Box 124 \ 2 scan0159 | |
| The interference fit on a B.80 3.5 Bore Aluminium part, requesting confirmation of its sufficiency. | 7th May 1940 | Box 124 \ 2 scan0160 | |
| Modifications to the B.80 Aluminium 3.5 Bore, RE971 Crankcase & Cylinders. | 7th May 1940 | Box 124 \ 2 scan0161 | |
| The distribution of blueprints for a modified wheelcase on B.40 and B.60 engines. | 7th May 1940 | Box 124 \ 2 scan0162 | |
| The dispatch of blueprints for new parts related to a water pump and fan. | 8th May 1940 | Box 124 \ 2 scan0163 | |
| Alteration note for increasing the diameter of a camshaft and hub bore. | 10th May 1940 | Box 124 \ 2 scan0164 | |
| Secret memorandum regarding fan belt clearance on the B.80 engine. | 14th May 1940 | Box 124 \ 2 scan0165 | |
| Performance calculations for the Eight-Cylinder Bentley, comparing the 11.B.V. model to the 4.B.30. | 14th May 1940 | Box 124 \ 2 scan0166 | |
| Performance data comparison for two engine units, including acceleration figures and maximum speeds. | 14th May 1940 | Box 124 \ 2 scan0167 | |
| Comparison of induction systems and the effect of different tyre sizes on vehicle performance. | 14th May 1940 | Box 124 \ 2 scan0168 | |
| Method for calculating a car's performance from clutch horsepower, detailing various power losses. | 14th May 1940 | Box 124 \ 2 scan0169 | |
| Procedure for calculating a vehicle's acceleration curve using horsepower and weight data. | 14th May 1940 | Box 124 \ 2 scan0170 | |
| Blueprints and parts for a Renold chain-driven camshaft assembly. | 16th May 1940 | Box 124 \ 2 scan0171 | |
| Instructions for incorporating the '2 Way Thrust Faces' and the Humber type Damper on a B.60 model. | 1st Jun 1946 | Box 124 \ 2 scan0172 | |
| Drawing PL.225 for the B.60 Petrol Pipe, urgently required for 'Ripplet'. | 17th May 1940 | Box 124 \ 2 scan0173 | |
| The failure of B.60 No.1 Unit on the test bed and instructions for repair. | 18th May 1940 | Box 124 \ 2 scan0174 | |
| Modifications to the 8-cylinder engine to give it 'Bentley' characteristics. | 20th May 1940 | Box 124 \ 2 scan0175 | |
| Diagrams and specifications for B.60 camshafts and cylinder heads. | 20th May 1940 | Box 124 \ 2 scan0176 | |
| Camshaft specifications with diagrams and notes on valve lift and duration. | 20th May 1940 | Box 124 \ 2 scan0177 | |
| Engine performance, detonation, and proposed cylinder head design improvements. | 20th May 1940 | Box 124 \ 2 scan0178 | |
| Drawings and parts for the Bentley 80 & L.H. Senior Range, PL.196 Hot Spot Operated Choke scheme. | 21th May 1940 | Box 124 \ 2 scan0179 | |
| The issuance of blueprints for B.60 Chassis camshaft components. | 21th May 1940 | Box 124 \ 2 scan0180 | |
| Assessment of a proposed modification to a drive fitment for cost-saving purposes, concluding it would be too expensive. | 24th May 1940 | Box 124 \ 2 scan0181 | |
| Design and placement of the B.80 carburetter petrol filter. | 24th May 1940 | Box 124 \ 2 scan0182 | |
| Revised mounting for the B.80 carburettor petrol filter to prevent fuel boiling. | 24th May 1940 | Box 124 \ 2 scan0183 | |
| Design of a tachometer drive for bi-directional camshafts, proposing separate schemes for gear and chain drives. | 28th May 1940 | Box 124 \ 2 scan0184 | |
| Oil fittings for the B.80 3½' Bore engine, enclosing blueprint L.O.P. No.RE.1231. | 29th May 1940 | Box 124 \ 2 scan0185 | |
| New blueprint parts for the B.60 engine's induction pipe and controls. | 29th May 1940 | Box 124 \ 2 scan0186 | |
| Blueprints and required parts for a bell crank throttle assembly. | 29th May 1940 | Box 124 \ 2 scan0187 | |
| Issue of engines running after being switched off and seeking reasons for variations between different models. | 29th May 1940 | Box 124 \ 2 scan0188 | |
| The issuance of new blueprints for induction pipe and engine control components. | 29th May 1940 | Box 124 \ 2 scan0189 | |
| Continued list of parts for an assembly, detailing components like dampers, shafts, and controls. | 9th Mar 1947 | Box 124 \ 2 scan0190 | |
| Blueprint for oil fittings for the B.80 3½ Bore engine. | 29th May 1940 | Box 124 \ 2 scan0191 | |
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