| Description | Date | Identifier | |
| Required repairs and replacement parts for a B.60 No.1 Unit engine after a valve failure. | 12th Dec 1939 | Box 124 \ 1 scan0284 | |
| List of chassis troubles and an explanation of the work being carried out to resolve them. | 15th Dec 1939 | Box 124 \ 1 scan0285 | |
| Various vehicle component issues such as piston blowby, water in the servo, and noisy heaters, along with attempted modifications. | 15th Dec 1939 | Box 124 \ 1 scan0286 | |
| Engine and chassis issues including noisy tappets, carburation, and shock damper knocks. | 15th Dec 1939 | Box 124 \ 1 scan0287 | |
| Two additional work features: fan noise and improving the 8-cylinder engine mounting. | 15th Dec 1939 | Box 124 \ 1 scan0288 | |
| Confirming the decision to fit a Humber damper to a B.60 No.1 Unit. | 19th Dec 1939 | Box 124 \ 1 scan0289 | |
| Request for a revised crankshaft drawing to incorporate a new damper for a B.60 No.1 unit. | 19th Dec 1939 | Box 124 \ 1 scan0290 | |
| Confirming the inclusion of a new 3 litre, 6-cylinder engine and sending pictures of other bore engines to Vickers. | 29th Dec 1939 | Box 124 \ 1 scan0291 | |
| Proposing a 3 litre 6 cylinder engine as a replacement, discussing component usage and crankshaft analysis. | 30th Dec 1939 | Box 124 \ 1 scan0292 | |
| Confirming a new crankshaft and damper arrangement for the Bentley 60 model. | 1st Jan 1940 | Box 124 \ 2 scan0001 | |
| Requesting detail drawings for the B 80 Indution Pipe, referencing schemes ECD. 1462 and 1509. | 2nd Jan 1940 | Box 124 \ 2 scan0002 | |
| History and mounting modifications of the Lucas Dynamo on the B.60 engine. | 3rd Jan 1940 | Box 124 \ 2 scan0003 | |
| New drawings for an induction system and water connections for a Stronberg Duplex Downdraught Carburetter. | 5th Jan 1940 | Box 124 \ 2 scan0004 | |
| Report on camshafts, requiring road tests to confirm test bed results. | 5th Jan 1940 | Box 124 \ 2 scan0005 | |
| Test report comparing three different camshafts for the Bentley B80 engine. | 5th Jan 1940 | Box 124 \ 2 scan0006 | |
| Test results and conclusions from altering camshafts to observe effects on power figures and valve bounce. | 5th Jan 1940 | Box 124 \ 2 scan0007 | |
| Table detailing camshafts fitted to specific engine and chassis units, including valve timing data. | 9th Dec 1939 | Box 124 \ 2 scan0008 | |
| Power comparison chart for two different camshafts, showing BHP, BMEP, and induction pipe depression against RPM. | 9th Dec 1939 | Box 124 \ 2 scan0009 | |
| Power performance graph comparing two different camshafts with and without a silencer, using 'Ethyl' petrol. | 9th Dec 1939 | Box 124 \ 2 scan0010 | |
| New internal lubrication scheme for the distributor drive via camshaft drilling. | 9th Jan 1940 | Box 124 \ 2 scan0011 | |
| Request to obtain three castings of an induction pipe (EB.4995) for the B.60 Chassis Programme, with instructions for modification. | 11th Jan 1940 | Box 124 \ 2 scan0012 | |
| Calculating the crankshaft torsional frequency for a 3-litre 6-cylinder engine. | 11th Jan 1940 | Box 124 \ 2 scan0013 | |
| Sparking plug accessibility on the B.60 Cast Iron Engine. | 13th Jan 1940 | Box 124 \ 2 scan0014 | |
| Chassis programme for the B.60 engine and the continuation of new 6-cylinder cast iron engines. | 15th Jan 1940 | Box 124 \ 2 scan0015 | |
| The development status and required modifications for B.60 and B.80 engines. | 15th Jan 1940 | Box 124 \ 2 scan0016 | |
| The chassis programme, specifically the progress on 8-cylinder engine units and castings for the 'Alum 8'. | 15th Jan 1940 | Box 124 \ 2 scan0017 | |
| Secret internal memorandum regarding a discussion and subsequent letter about body costs. | 15th Jan 1940 | Box 124 \ 2 scan0018 | |
| Letter to Falconer regarding the cost analysis of the B.V. type body and potential cost reduction strategies. | 18th Jan 1940 | Box 124 \ 2 scan0019 | |
| Letter discussing cost reductions and production planning for car bodies with Park Ward & Co. Ltd. | 18th Jan 1940 | Box 124 \ 2 scan0020 | |
| Blueprints for the Induction Pipe of an ECD. 1509 Induction System for a Stromberg Duplex Downdraught Carburetter. | 18th Jan 1940 | Box 124 \ 2 scan0021 | |
| Distributing new drawings for a Humber Damper, Crankshaft, and Spring Drive. | 22th Jan 1940 | Box 124 \ 2 scan0022 | |
| Finishing process for rationalised cast iron engine units. | 23th Jan 1940 | Box 124 \ 2 scan0023 | |
| Chassis Programme for the Bentley 60 Crankshaft and Damper, requesting an order for parts. | 23th Jan 1940 | Box 124 \ 2 scan0024 | |
| Instruction to replace existing pistons (EB.3916) with a new set (P.482) on an 8 cylinder Bentley B.80 No.4 unit. | 24th Jan 1940 | Box 124 \ 2 scan0025 | |
| Issue of new drawings for an induction system with a Stromberg AA.25 carburetter. | 24th Jan 1940 | Box 124 \ 2 scan0026 | |
| Requesting the production of six castings for inlet pipes and water connections. | 25th Jan 1940 | Box 124 \ 2 scan0027 | |
| Fitting rev counters to existing engines and requesting detail drawings of camshafts. | 27th Jan 1940 | Box 124 \ 2 scan0028 | |
| Investigation into the causes of a high-power engine running on after being switched off. | 29th Jan 1940 | Box 124 \ 2 scan0029 | |
| Request to temporarily fit two large Burgess exhaust silencers to a test bed engine for power loss checks. | 1st Feb 1940 | Box 124 \ 2 scan0030 | |
| Blueprints and parts for a Single Downtake Exhaust Manifold. | 1st Feb 1940 | Box 124 \ 2 scan0031 | |
| Requesting the production of six sets of a simplified exhaust manifold for the Bentley 60. | 2nd Feb 1940 | Box 124 \ 2 scan0032 | |
| The distribution of blueprints for new Bearing Bushes and an Oil Baffle drawings. | 2nd Feb 1940 | Box 124 \ 2 scan0033 | |
| Blueprints for a 6 Cylinder Cast Iron Engine Crankshaft and associated parts. | 7th Feb 1940 | Box 124 \ 2 scan0034 | |
| Issuance of blueprints for a spring drive system and its components for a cast iron engine. | 7th Feb 1940 | Box 124 \ 2 scan0035 | |
| Alteration note for an induction pipe, detailing the addition of a boss for a throttle control lever. | 9th Feb 1940 | Box 124 \ 2 scan0036 | |
| Alteration notice for an Induction Pipe, detailing a change to the core plug bosses. | 9th Feb 1940 | Box 124 \ 2 scan0037 | |
| Blueprints and parts for a B.60 Engine with a PL.90 Humber damper. | 9th Feb 1940 | Box 124 \ 2 scan0038 | |
| Heavy and light type flywheels for the B.80 engine with a Lucas starter motor. | 12th Feb 1940 | Box 124 \ 2 scan0039 | |
| Heavy and light flywheels for the B.60 engine, including modifications to the lighter flywheel. | 12th Feb 1940 | Box 124 \ 2 scan0040 | |
| Attaching prints of a Lucas Dynamo to a B.60 engine and the associated mounting issues. | 12th Feb 1940 | Box 124 \ 2 scan0041 | |
| Blueprints for the B.60 engine's connecting rod and its production. | 13th Feb 1940 | Box 124 \ 2 scan0042 | |
| Crankshaft dampers on B.60 and B.80 engines, discussing different types and development history. | 14th Feb 1940 | Box 124 \ 2 scan0043 | |
| Alterations and precautions for the experimental Bentley 60 Unit No. 3 engine. | 15th Feb 1940 | Box 124 \ 2 scan0044 | |
| Photograph of a cast rocker pedestal from a Junkers engine. | 20th Feb 1940 | Box 124 \ 2 scan0045 | |
| Confirming the dispatch of two blueprints for B.60 3 1/2 Litre (Ripplet) Valves & Fittings. | 22th Feb 1940 | Box 124 \ 2 scan0046 | |
| The tabulation and design of flywheels for 6-cylinder engines. | 23th Feb 1940 | Box 124 \ 2 scan0047 | |
| Data comparison table for flywheels used on various 6 and 8 cylinder engines. | 1st Jan 1950 | Box 124 \ 2 scan0048 | |
| Flywheel data sheet for B.60 and B.80 C.I. engines with Lucas starter motors. | 23th Feb 1940 | Box 124 \ 2 scan0049 | |
| Mounting of a Lucas Dynamo on a B.80 engine and its output adequacy. | 23th Feb 1940 | Box 124 \ 2 scan0050 | |
| The design and drawings for B.60 and B.80 H.T. Wiring Tubes. | 28th Feb 1940 | Box 124 \ 2 scan0051 | |
| Alteration to the drilling dimensions of a B.60 Connecting Rod. | 29th Feb 1940 | Box 124 \ 2 scan0052 | |
| Request for a detailed scheme for the controls of 2 S.U. carburettors on a B.60 engine. | 2nd Mar 1940 | Box 124 \ 2 scan0053 | |
| Design fault making it impossible to remove a fan belt on 8-cylinder motor cars. | 2nd Mar 1940 | Box 124 \ 2 scan0054 | |
| Removal of balance weights and rebalancing of a crankshaft. | 6th Mar 1940 | Box 124 \ 2 scan0055 | |
| Confirming the need for a light type flywheel for a Bentley (9.B.V.) fitted with a B.60 Cast Iron engine. | 8th Mar 1940 | Box 124 \ 2 scan0056 | |
| Difficulty of removing the fan belt on chassis fitted with the B.80 engine. | 8th Mar 1930 | Box 124 \ 2 scan0057 | |
| Blueprints for top and bottom water connections and associated parts. | 8th Mar 1940 | Box 124 \ 2 scan0058 | |
| Machining difficulties and design considerations for Filler Cap EB.5028. | 12th Mar 1940 | Box 124 \ 2 scan0059 | |
| Enquiry about a filler cap, a mislaid previous memo, and actions to avoid further hold-ups. | 12th Mar 1940 | Box 124 \ 2 scan0060 | |
| List of instructions for modifying and testing the B.60 No: 2 engine. | 12th Mar 1940 | Box 124 \ 2 scan0061 | |
| Torsional vibration tests on the B.60 model with and without a rubber coupling. | 12th Mar 1940 | Box 124 \ 2 scan0062 | |
| Comparison between the Humber damper and the Studebaker damper, noting the poor results of the latter on the test bed. | 12th Mar 1940 | Box 124 \ 2 scan0063 | |
| Blueprint graph of the Wraith spring drive, comparing performance in 3rd gear with and without a flexible coupling in the prop-shaft. | 12th Mar 1940 | Box 124 \ 2 scan0064 | |
| Graph showing low frequency vibration correction for a B.60 No 2 Wraith Spring Drive. | 12th Mar 1940 | Box 124 \ 2 scan0065 | |
| Graph comparing the performance of Studebaker and Humber dampers by plotting amplitude versus engine RPM. | 13th Mar 1940 | Box 124 \ 2 scan0066 | |
| Issue of two blueprints for the RE.618 camshaft for the B.60 Ripplet. | 13th Mar 1940 | Box 124 \ 2 scan0067 | |
| Explaining a delay in answering a query regarding the production of filler cap EB.5028. | 14th Mar 1940 | Box 124 \ 2 scan0068 | |
| Unsatisfactory rear brake life on 8-cylinder cars and proposed solutions. | 14th Mar 1940 | Box 124 \ 2 scan0069 | |
| Suggestions for modified designs, referencing a rationalised range of pieces and a four-shoe scheme. | 14th Mar 1940 | Box 124 \ 2 scan0070 | |
| Brake and lining wear for three specific car models with hydraulic front and Girling rear systems. | 23th Jan 1940 | Box 124 \ 2 scan0071 | |
| The performance, wear, and maintenance of the hydraulic front and Girling rear brake system on chassis 11.B.V. | 23th Jan 1940 | Box 124 \ 2 scan0072 | |
| Update to a report on brake wear inspection, mileage, and car weight. | 23th Jan 1940 | Box 124 \ 2 scan0073 | |
| Comparative test report on brake wear for a car (33.G.VII) with Hydraulic Front and Girling Rear brakes. | 23th Jan 1940 | Box 124 \ 2 scan0074 | |
| Confirmation to order parts for a roller chain front-end drive for B.60 engines, as an alternative to the morse chain. | 18th Mar 1940 | Box 124 \ 2 scan0075 | |
| Rationalising front-end drives for the B.60 engine, specifically regarding the spring drive. | 18th Mar 1940 | Box 124 \ 2 scan0076 | |
| Alteration notice regarding the removal of surplus metal from the exhaust port of a B40 crankcase and cylinders casting. | 18th Mar 1940 | Box 124 \ 2 scan0077 | |
| Cover memo for the specification of the B.80 Aluminium 8 Cylinder 3 1/4 Bore Engine. | 18th Mar 1940 | Box 124 \ 2 scan0078 | |
| Providing blueprints for a water gallery and cylinder head joint washer related to the B.40 crankcase and bearings. | 18th Mar 1940 | Box 124 \ 2 scan0079 | |
| Specification document for a B.80 8 cylinder 3 1/2 Bore C.I. Engine, noting modifications and blueprint issuance. | 18th Mar 1940 | Box 124 \ 2 scan0080 | |
| Prints for new details concerning the Flywheel, Clutch, and Clutch Casing for the R.H. Senior Range B.60 Ripplet. | 18th Mar 1940 | Box 124 \ 2 scan0081 | |
| Specifications for the B.40 4 Cylinder and B.60 6 Cylinder C.I. engines. | 18th Mar 1940 | Box 124 \ 2 scan0082 | |
| Instruction memo regarding new blueprints for B.60 3¼ Bore ignition wiring and fittings. | 19th Mar 1940 | Box 124 \ 2 scan0083 | |
| New blueprints for H.T. Ignition Wiring parts and instructing on their implementation. | 19th Mar 1940 | Box 124 \ 2 scan0084 | |
| New drawings and blueprints for the B.60 engine's ignition H.T. wiring. | 19th Mar 1940 | Box 124 \ 2 scan0085 | |
| Instruction memo regarding a new Wheelcase LoP, cancelling a previous instruction. | 19th Mar 1940 | Box 124 \ 2 scan0086 | |
| Fitting of an A.C. air silencer to the B.60 engine with a Stromberg carburetter. | 19th Mar 1940 | Box 124 \ 2 scan0087 | |
| Accompanying preliminary blueprints for a B. 60, 3.500 Bore Crankcase & Cylinders. | 20th Mar 1940 | Box 124 \ 2 scan0088 | |
| The distribution of blueprints for B.40 Engine inlet pipes. | 20th Mar 1940 | Box 124 \ 2 scan0089 | |
| Blueprints for a B.60 75 M/M Bore Crankcase & Cylinders. | 20th Mar 1940 | Box 124 \ 2 scan0090 | |
| Issue of blueprints for the B.60 engine crankcase and cylinders with a 3.750 bore. | 28th Mar 1940 | Box 124 \ 2 scan0091 | |
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