| Description | Date | Identifier | |
| Design note discussing variations to the frame and springs for the B.50 chassis. | 26th Jan 1938 | Box 112 \ 2 scan0096 | |
| Continued list of specifications for various vehicle components including wheels, axle, and exhaust. | 26th Jan 1938 | Box 112 \ 2 scan0097 | |
| Frame, transmission, and springs for the Bentley 50. | 27th Jan 1938 | Box 112 \ 2 scan0098 | |
| Parts and blueprint requirements for the 1st Bentley 50 frame. | 4th Apr 1938 | Box 112 \ 2 scan0099 | |
| Note regarding a blueprint for a dashboard mounting bracket to suit a Bentley 50 riveted frame. | 9th Apr 1938 | Box 112 \ 2 scan0100 | |
| Comparison of production and development costs for B.III and B.50 frames from various suppliers. | 11th Apr 1938 | Box 112 \ 2 scan0101 | |
| Request to box in the rear end of the frame for additional strength for jacking purposes. | 3rd May 1938 | Box 112 \ 2 scan0102 | |
| The principal chassis dimensions for the Bentley 50 frame. | 4th Jun 1938 | Box 112 \ 2 scan0103 | |
| Modifications required to increase the length of B.50 frames to accommodate a Straight Eight engine. | 29th Aug 1938 | Box 112 \ 2 scan0104 | |
| Requesting the attachment of steel plates to frame side members and the fitting of Woodhead springs to a chassis. | 7th Sep 1938 | Box 112 \ 2 scan0105 | |
| Frame shaking issues on the 1.B.50 model due to oscillation frequency and proposed alterations. | 20th Sep 1938 | Box 112 \ 2 scan0106 | |
| Requesting modifications to a car frame, including strengthening the front and adjusting the rear springs. | 27th Sep 1938 | Box 112 \ 2 scan0107 | |
| Weights of the B.50 and Silver Wraith frames. | 24th Oct 1938 | Box 112 \ 2 scan0108 | |
| The modification of step irons for the Bentley 50 frame. | 28th Oct 1938 | Box 112 \ 2 scan0109 | |
| With instructions for twisting and rebuilding a car frame. | 24th Nov 1938 | Box 112 \ 2 scan0110 | |
| Requesting an order for a B.50 frame with specific thickness details for the bump chassis. | 24th Nov 1938 | Box 112 \ 2 scan0111 | |
| Request to detail a longer rear bumper bracket for Bentley 50 chassis 2.B.50 due to a frame measurement discrepancy. | 5th Dec 1938 | Box 112 \ 2 scan0112 | |
| Letter to the Royal Automobile Club requesting breakdown statistics for belt drive systems. | 1st Nov 1937 | Box 112 \ 2 scan0113 | |
| Letter to the Institute of Automobile Engineers requesting statistics on the use of belt drives for water pumps and dynamos. | 2nd Nov 1937 | Box 112 \ 2 scan0114 | |
| Letter requesting statistics on the use of belt drives for water pumps and generators in British cars. | 2nd Nov 1937 | Box 112 \ 2 scan0115 | |
| Letter from The Royal Automobile Club regarding a lack of data on water pump failures due to broken belts. | 3rd Nov 1937 | Box 112 \ 2 scan0116 | |
| Letter from the Institution of Automobile Engineers responding to a request for information on cars using belt drives. | 3rd Nov 1937 | Box 112 \ 2 scan0117 | |
| Letter from the Society of Motor Manufacturers and Traders regarding an enquiry about belt drives for dynamos and water pumps. | 4th Nov 1937 | Box 112 \ 2 scan0118 | |
| Letter from The Royal Automobile Club regarding a request for data on dynamo drives. | 4th Nov 1937 | Box 112 \ 2 scan0119 | |
| Letter from The Royal Automobile Club discussing engineer feedback on belt drive performance and overheating issues. | 11th Nov 1937 | Box 112 \ 2 scan0120 | |
| Letter to the Secretary of The Royal Automobile Club thanking them for information provided. | 16th Nov 1937 | Box 112 \ 2 scan0121 | |
| Letter from The Society of Motor Manufacturers and Traders Limited providing statistics on belt drive vs. positive drive usage in cars. | 18th Nov 1937 | Box 112 \ 2 scan0122 | |
| Modified and cheaper fan mounting design for the Power Head Engine, superseding a previous version. | 19th May 1938 | Box 112 \ 2 scan0123 | |
| Notification of a new drawing for a modified fan mounting on the Bentley 50 Cast Iron Engine. | 13th Jun 1938 | Box 112 \ 2 scan0124 | |
| Request to manufacture a set of Wraith fan blades from specific material for testing on a Phantom III fan flange. | 9th Dec 1936 | Box 112 \ 2 scan0125 | |
| Oil fittings and relief valve for the Bentley 50 cast iron engine. | 13th Apr 1938 | Box 112 \ 2 scan0126 | |
| List of technical specifications for the Phoenix car, focusing on component interchangeability with other models. | 14th May 1937 | Box 112 \ 2 scan0127 | |
| Cost analysis for a Bentley car, proposing material substitutions to achieve an approximate 58% saving. | 6th Dec 1937 | Box 112 \ 2 scan0128 | |
| Cost analysis showing material savings and the price for Aluminizing or Nickel plating processes. | 9th Apr 1938 | Box 112 \ 2 scan0129 | |
| Alterations and instructions for the Bentley 50 exhaust system and tail pipe. | 9th Apr 1938 | Box 112 \ 2 scan0130 | |
| Modification to the exhaust fittings for the Bentley 50 chassis. | 17th May 1938 | Box 112 \ 2 scan0131 | |
| Necessary modification to the exhaust silencer support to prevent it fouling the heelboard of the rear seat. | 27th May 1938 | Box 112 \ 2 scan0132 | |
| Modifications to the Bentley 50 exhaust tail pipe to accommodate new shock dampers. | 11th Jun 1938 | Box 112 \ 2 scan0133 | |
| Requesting the fabrication and fitting of parts for a Bentley 50 exhaust system. | 4th Aug 1938 | Box 112 \ 2 scan0134 | |
| Request to try a modified exhaust system on a Bentley Car 1.B.50, deleting the rear silencer. | 8th Sep 1938 | Box 112 \ 2 scan0135 | |
| Request to build and fit a complete exhaust system to a Bentley 2.B.50. | 31th Oct 1938 | Box 112 \ 2 scan0136 | |
| Request to manufacture an experimental centre expansion box in mild steel for a Bentley 50 exhaust system. | 24th Nov 1938 | Box 112 \ 2 scan0137 | |
| Simplification of rear engine mounting for the B.50 car, referencing the Wraith and B.III frames. | 5th Oct 1938 | Box 112 \ 3 scan0001 | |
| Request for an urgent repair of a broken rear engine mounting cross member and gearbox during testing. | 13th Feb 1939 | Box 112 \ 3 scan0002 | |
| Estimated cost savings comparison for parts between the Bentley II and Bentley 50 models, without any design changes. | 6th Dec 1937 | Box 112 \ 3 scan0003 | |
| Confirming decisions on the placement and type of steering column controls for project B.50. | 8th Jan 1938 | Box 112 \ 3 scan0004 | |
| Elimination, retention, and addition of steering column controls for project B.50. | 8th Jan 1938 | Box 112 \ 3 scan0005 | |
| The testing procedure for Barker Colman taper splines on a Bentley 50. | 10th Feb 1938 | Box 112 \ 3 scan0006 | |
| Drawing of test pieces for comparing Barber Colman splines and plain taper with Woodruff keys. | 23th Mar 1938 | Box 112 \ 3 scan0007 | |
| Modifications to cross steering levers for the 1.B.50 car. | 23th Mar 1938 | Box 112 \ 3 scan0008 | |
| Request to issue cross steering levers for experiment on model 1.B.50. | 23th Mar 1938 | Box 112 \ 3 scan0009 | |
| Modification of cross steering levers for the 1.B.50 model. | 23th Mar 1938 | Box 112 \ 3 scan0010 | |
| Mounting for a steering box on the Bentley 50 steering column. | 7th Apr 1938 | Box 112 \ 3 scan0011 | |
| The proposed method for supporting the steering column on the body for the first Bentley 50. | 11th Apr 1938 | Box 112 \ 3 scan0012 | |
| Steering geometry issues and proposed solutions for B.III and B.50 chassis. | 24th May 1938 | Box 112 \ 3 scan0013 | |
| Scheme for a gastight seal for the steering column on a Bentley 50 dashboard. | 3rd Jun 1938 | Box 112 \ 3 scan0014 | |
| Internal memorandum requesting the detailing of temporary parts for an improved steering geometry. | 15th Jun 1938 | Box 112 \ 3 scan0015 | |
| Requesting an official order for 3 cams from Adamant Engineering Co. for use on a Bentley 50. | 22th Jun 1938 | Box 112 \ 3 scan0016 | |
| Letter to The Adamant Engineering Co. Ltd. requesting a trial batch of steering cams with a modified manufacturing process. | 22th Jun 1938 | Box 112 \ 3 scan0017 | |
| Steering geometry issues and wandering on B.III & B.50 models, recommending a hold on producing new steering levers until trials are complete. | 29th Jun 1938 | Box 112 \ 3 scan0018 | |
| New drawings and standard parts for an improved steering geometry on Bentley 111 and Bentley 50 models. | 1st Jul 1938 | Box 112 \ 3 scan0019 | |
| Technical memorandum detailing modifications to the B.50 steering and yoke piece dies for different caster angles. | 16th Sep 1938 | Box 112 \ 3 scan0020 | |
| Steering modifications for B.III and B.50 models, including fitting new ball joints and steering tubes. | 20th Sep 1938 | Box 112 \ 3 scan0021 | |
| Strengthened pivot for models B.111 and B.50, including changes to the yoke and stud centres. | 30th Sep 1938 | Box 112 \ 3 scan0022 | |
| Requesting a Bentley rocking shaft and steering roller follower for checking steering cams on a new machine. | 10th Oct 1938 | Box 112 \ 3 scan0023 | |
| The steering column for Bentley 50 and Wraith 80 models, specifically the F.CD.1007 rubber-mounted steering box. | 9th Nov 1938 | Box 112 \ 3 scan0024 | |
| Temporary change to the steering mounting for B.V., 50, & Silver Wraith chassis. | 16th Dec 1938 | Box 112 \ 3 scan0025 | |
| Adjustment of front wheel toe-in for the B.V., 50 & Silver Wraith chassis to reduce tyre wear. | 16th Dec 1938 | Box 112 \ 3 scan0026 | |
| Parts and blueprints for the B.V. B.50 and Silver Wraith steering column and box. | 31th Dec 1938 | Box 112 \ 3 scan0027 | |
| The dispatch of blueprints for Bentley V Chassis steering column parts. | 31th Jan 1939 | Box 112 \ 3 scan0028 | |
| Confirmation memo regarding the replacement of bakelite steering components with standard bronze parts. | 19th Apr 1939 | Box 112 \ 3 scan0029 | |
| Request to modify yokes for a B.50 steering system to test a new castor angle. | 21th Apr 1939 | Box 112 \ 3 scan0030 | |
| Request to produce a set of front axle yokes for a Bentley 50 Chassis, referencing a memo to provide a specific castor angle. | 22th Apr 1939 | Box 112 \ 3 scan0031 | |
| Modifications to B.V. & 50 steering for increased tyre clearance. | 4th May 1939 | Box 112 \ 3 scan0032 | |
| Instructions for the creation and modification of a B.50 petrol tank to fit R.R. type shock dampers. | 13th Jun 1938 | Box 112 \ 3 scan0033 | |
| Suggesting a modification to the petrol tank air vent pipe scheme to prevent leaks and save cost. | 11th Oct 1938 | Box 112 \ 3 scan0034 | |
| Instructions for fitting an AC mechanical petrol pump and keeping the existing pump as a standby. | 27th Mar 1939 | Box 112 \ 3 scan0035 | |
| Requesting the replacement of a petrol tank and the wiring of its K.S. petrol gauge. | 2nd Jun 1939 | Box 112 \ 3 scan0036 | |
| Investigation into the failure of the 'B' side of a 2.B.50 petrol pump. | 30th Dec 1940 | Box 112 \ 3 scan0037 | |
| Modifications to an 8-cylinder engine camshaft, advising a delay for new camforms. | 30th Sep 1938 | Box 112 \ 3 scan0038 | |
| Official order for silver finish steel sheets for a B.50 bonnet. | 16th Mar 1938 | Box 112 \ 3 scan0039 | |
| Design and materials for a bonnet with fixed side plates for model 1-B-50. | 9th Apr 1938 | Box 112 \ 3 scan0040 | |
| Instructions for fixing the bonnet side plate for the B.50 model, detailing the procedure for a Rover type bonnet. | 12th Apr 1938 | Box 112 \ 3 scan0041 | |
| Design memo detailing a scheme for the Bonnet Valance Strip for the B.50 model. | 13th Apr 1938 | Box 112 \ 3 scan0042 | |
| The dimensions, shape, and instructions for the B.50 bonnet layout. | 20th Apr 1938 | Box 112 \ 3 scan0043 | |
| Confirming production arrangements for the B.50 Rover Type Bonnet. | 11th May 1938 | Box 112 \ 3 scan0044 | |
| Issuance of new drawings for the Bentley 50, Bonnet Section 5260. | 20th May 1938 | Box 112 \ 3 scan0045 | |
| New blueprints for the Bentley 50 chassis bonnet. | 21th May 1938 | Box 112 \ 3 scan0046 | |
| Design, requirements, and interchangeability of bonnets for the B.50 and B.3 models. | 2nd Jun 1938 | Box 112 \ 3 scan0047 | |
| Provision and fitting of a non-standard bonnet rest strip. | 29th Jun 1938 | Box 112 \ 3 scan0048 | |
| Notes and considerations regarding the assembly of a detachable-sided steel bonnet. | 30th Jun 1938 | Box 112 \ 3 scan0049 | |
| Side strip components and a comparative analysis of bonnet weights. | 30th Jun 1938 | Box 112 \ 3 scan0050 | |
| Report comparing the orthodox and Rover type bonnets for B.III & B.50 car models. | 21th Sep 1938 | Box 112 \ 3 scan0051 | |
| Comparison of orthodox and Rover type bonnets regarding weight, cost, and user convenience. | 21th Sep 1938 | Box 112 \ 3 scan0052 | |
| Comparing various bonnet designs and proposing a revised scheme for the B.50 Rover type bonnet. | 21th Sep 1938 | Box 112 \ 3 scan0053 | |
| Design and cost of bonnet fasteners for B.III & B.50 type cars. | 7th Nov 1938 | Box 112 \ 3 scan0054 | |
| The procurement of bonnets for 8.B.V. & 2.B.50 cars. | 15th Nov 1938 | Box 112 \ 3 scan0055 | |
| Distributing blueprints for new bonnet side plate details for the Bentley V Chassis. | 18th Nov 1938 | Box 112 \ 3 scan0056 | |
| Inspection report with criticisms on a new bonnet design for B.V. and B.70 chassis. | 2nd Dec 1938 | Box 112 \ 3 scan0057 | |
| Bonnet design issues and proposed modifications for various car models. | 2nd Dec 1938 | Box 112 \ 3 scan0058 | |
| | | | |