| Description | Date | Identifier | |
| Servo efficiency tests, investigating the effect of temperature on the friction coefficient of brake linings. | 26th Oct 1934 | Box 87 \ 5 scan0031 | |
| Brake lining tests, servo performance, and the mechanical efficiency of different brake components. | 26th Oct 1934 | Box 87 \ 5 scan0032 | |
| Test report comparing the performance of various servo linings. | 26th Oct 1934 | Box 87 \ 5 scan0033 | |
| Comparative table of different servo lining materials and their performance characteristics. | 26th Oct 1934 | Box 87 \ 5 scan0034 | |
| Graph showing the variation of friction with temperature for Ferodo RAD 13 friction material across three test runs. | 2nd Oct 1934 | Box 87 \ 5 scan0035 | |
| Graph showing the variation of friction with temperature for Ferodo V.M. 30 friction material. | 18th Oct 1934 | Box 87 \ 5 scan0036 | |
| Graph showing hysteresis loops for a Bentley servo motor with different bearing and connection configurations. | 25th Oct 1934 | Box 87 \ 5 scan0037 | |
| The standardization and fitting of Fully Floating Servos on Bentley and 20/25 models. | 2nd Nov 1934 | Box 87 \ 5 scan0038 | |
| Issues with the Bentley and 25 HP servo and a proposal for a modified design. | 2nd Nov 1934 | Box 87 \ 5 scan0039 | |
| Tests on Servo Operating Cams for Bentley & 25 HP models and requesting the construction of modified versions. | 28th Nov 1934 | Box 87 \ 5 scan0040 | |
| Replacement of a special ball bearing in the servo drive with a standard type to reduce costs and delivery difficulties. | 8th Dec 1934 | Box 87 \ 5 scan0041 | |
| Request to manufacture a Bentley Servo Motor Drum from Cast Iron Spec. 249 for testing to reduce squeaking. | 11th Dec 1934 | Box 87 \ 5 scan0042 | |
| Ball bearing for the brake system servo motor. | 19th Dec 1934 | Box 87 \ 5 scan0043 | |
| Experiments testing a special ball bearing with end play against an ordinary one in servo motors. | 19th Dec 1934 | Box 87 \ 5 scan0044 | |
| Graph showing the hysteresis of a Bentley 25 HP servo, comparing special and ordinary ball bearings. | 31th Dec 1934 | Box 87 \ 5 scan0045 | |
| Friction issues with the servo balance lever arm and suggesting oiled cotton duck as a solution. | 31th Dec 1934 | Box 87 \ 5 scan0046 | |
| The general specification of a servo to be tested on a Bentley Chassis. | 1st Jan 1935 | Box 87 \ 5 scan0047 | |
| Requesting the production of two additional pairs of modified servo cams for the Bentley & 25 HP model. | 2nd Jan 1935 | Box 87 \ 5 scan0048 | |
| List of proposed modifications to the Bentley Servo mechanism to reduce its weight. | 9th Jan 1935 | Box 87 \ 5 scan0049 | |
| Component alterations for a 10,000-mile test and a forthcoming material change for a suspension bracket. | 9th Jan 1935 | Box 87 \ 5 scan0050 | |
| The fitting of servo motors to specific Bentley and 25 HP chassis for testing purposes. | 15th Jan 1935 | Box 87 \ 5 scan0051 | |
| Fitting of Cotton Duck friction material to the servo balancer arm suspension on chassis 5-B-IV. | 14th Feb 1935 | Box 87 \ 5 scan0052 | |
| With a sketch detailing a modification for a servo balance arm's friction joint. | 2nd Jan 1935 | Box 87 \ 5 scan0053 | |
| Proposed modifications to the Bentley servo and brake leverages. | 11th Mar 1935 | Box 87 \ 5 scan0054 | |
| Technical memorandum discussing modifications to levers and a friction scheme for a servo system. | 11th Mar 1935 | Box 87 \ 5 scan0055 | |
| Alteration to the Bentley Servo's friction device for the balance arm. | 2nd Apr 1935 | Box 87 \ 5 scan0056 | |
| Modifications to the Bentley Servo-friction for Balance Arm to allow its use on the 20/25 model. | 16th Apr 1935 | Box 87 \ 5 scan0057 | |
| Two faults found in floating servo cams for 25 HP and Bentley models and requesting corrected drawings. | 3rd Jul 1935 | Box 87 \ 5 scan0058 | |
| Issues with splined linings on servos for Spectre, Bentley, and 25 HP models, including incorrect fitting and clearance problems. | 8th Jul 1935 | Box 87 \ 5 scan0059 | |
| Request to fit a new set of spring rings to a car's servo motor which was damaged during judder experiments. | 4th Mar 1936 | Box 87 \ 5 scan0060 | |
| Requesting the replacement of worn servo cams with new experimental parts following a 10,000-mile test. | 1st Apr 1936 | Box 87 \ 5 scan0061 | |
| Sheared rivets on the Bentley servo balance lever, recommending a change to bolts for certain models. | 2nd Apr 1936 | Box 87 \ 5 scan0062 | |
| The failure of rivets on the servo balance lever for the 25/30 HP & Bentley Servo, recommending an immediate change to bolts. | 10th Sep 1936 | Box 87 \ 5 scan0063 | |
| The standardisation of servo linings for the Bentley and 25/30 chassis and a change in material designation. | 24th Dec 1936 | Box 87 \ 5 scan0064 | |
| Requesting servo cams with a 40 degree angle instead of the instructed 45 degrees for the 6-B-IV Servo chassis. | 1st Jan 1937 | Box 87 \ 5 scan0065 | |
| Drawings and production standardization for a new Servo Motor Mechanism. | 8th Jan 1937 | Box 87 \ 5 scan0066 | |
| Requesting the fitting of Ferodo S.5584 linings to a chassis servo. | 27th Jan 1937 | Box 87 \ 5 scan0067 | |
| Standardisation report for a servo part with new linings to reduce working temperature, friction, and cost. | 27th Nov 1936 | Box 87 \ 5 scan0068 | |
| Estimated cost and production timeline for new tools for the 25/30HP Chassis. | 5th Mar 1937 | Box 87 \ 5 scan0069 | |
| Shortage of the latest type of Bentley servo motor and a request to expedite die production. | 5th Mar 1937 | Box 87 \ 5 scan0070 | |
| Progress of standardisation sheets for Bentley chassis servos. | 8th Mar 1937 | Box 87 \ 5 scan0071 | |
| Standardisation of a disc type damper on the servo suspension bracket to prevent brake thumps. | 22th Dec 1936 | Box 87 \ 5 scan0072 | |
| Cost estimation and production plan for new tooling for the 'L' Series chassis to prevent brake snatch. | 11th Feb 1936 | Box 87 \ 5 scan0073 | |
| Standardisation of parts document for servo improvements and cost analysis. | 13th Nov 1936 | Box 87 \ 5 scan0074 | |
| Estimated cost of new tools for the 25/30HP chassis standardisation. | 12th Nov 1935 | Box 87 \ 5 scan0075 | |
| Status report detailing mileage tests completed on various vehicle components. | 9th Apr 1937 | Box 87 \ 5 scan0076 | |
| Status of dies required for Bentley chassis servo levers and other components. | 9th Apr 1937 | Box 87 \ 5 scan0077 | |
| Standardisation of Bentley servo cams and associated parts. | 15th Jun 1937 | Box 87 \ 5 scan0078 | |
| Invoice from Ferodo Ltd. for discs supplied without an official order. | 2nd Aug 1937 | Box 87 \ 5 scan0079 | |
| Letter from Ferodo Ltd. regarding an invoice and material supplied against a verbal request. | 30th Jul 1937 | Box 87 \ 5 scan0080 | |
| Requesting a covering order for Servo linings from Messrs Ferodo following a verbal order. | 5th Aug 1937 | Box 87 \ 5 scan0081 | |
| Standardisation report for 35° Servo Cams with Ferodo BZ linings. | 4th Jun 1937 | Box 87 \ 5 scan0082 | |
| Production change assessment for the 'L' Series chassis, noting no extra tool cost. | 10th Dec 1938 | Box 87 \ 5 scan0083 | |
| Proposal to test cheaper alternative materials for the Bentley & 25/30.HP servo drive worm wheel. | 13th Dec 1937 | Box 87 \ 5 scan0084 | |
| Order of Bentley servo rings and a quotation for servo discs. | 30th Dec 1937 | Box 87 \ 5 scan0085 | |
| Instruction to fit an aluminium worm wheel to the gearbox of a 5.B.IV dynamometer chassis. | 7th Apr 1938 | Box 87 \ 5 scan0086 | |
| Requesting two blueprints for a Bentley Servo Drive spring. | 12th May 1938 | Box 87 \ 5 scan0087 | |
| Confirming three blueprints for a new spring for the Bentley Servo Drive have been sent. | 23th Jun 1938 | Box 87 \ 5 scan0088 | |
| The issue of three blueprints for a re-designed spring for the Bentley Servo Drive. | 23th Jun 1938 | Box 87 \ 5 scan0089 | |
| 100-hour test on a servo worm wheel from a Bentley Dynamometer Chassis, noting pitting on the gear teeth. | 29th Sep 1938 | Box 87 \ 5 scan0090 | |
| Photograph of a Servo Worm Gear from a Bentley Dynamometer Chassis after a 100-hour test. | 10th Oct 1938 | Box 87 \ 5 scan0091 | |
| Request to issue an official order to Ferodo Ltd for two servo friction discs for experimental purposes. | 10th Oct 1938 | Box 87 \ 5 scan0092 | |
| Responding to a query about modifications and issues with servo units on a Bentley chassis. | 20th Oct 1938 | Box 87 \ 5 scan0093 | |
| Complaint regarding inefficient servos on Bentley B.II & 25/30 HP models due to worn bushes. | 27th Oct 1938 | Box 87 \ 5 scan0094 | |
| Design and features of guard ring type steering column controls. | 15th Jan 1932 | Box 87 \ 5 scan0095 | |
| Modification to the Bensport steering column arrangement. | 16th Jun 1932 | Box 87 \ 5 scan0096 | |
| Design of the steering column and wheel for the Bensport model, comparing it to Peregrine and Bentley parts. | 27th Jun 1932 | Box 87 \ 5 scan0097 | |
| The use of Bentley parts for the Bensport model, including controls, mascot, and a modified filler cap. | 29th Jun 1932 | Box 87 \ 5 scan0098 | |
| Design proposals for controls on the steering column for various car models. | 14th Jul 1932 | Box 87 \ 5 scan0099 | |
| Design options for the Bentley steering wheel and controls, comparing different wheels and finishes. | 16th Jul 1932 | Box 87 \ 5 scan0100 | |
| Critique of the steering column controls, including carburettor, headlamp and dimming functions on various models. | 16th Jul 1932 | Box 87 \ 5 scan0101 | |
| On steering column controls, discussing mixture and dimmer switch placement. | 19th Jul 1932 | Box 87 \ 5 scan0102 | |
| Observations and recommendations for the Bensport steering column controls. | 21th Jul 1932 | Box 87 \ 5 scan0103 | |
| Design and modification of controls on steering columns for various car models. | 22th Jul 1932 | Box 87 \ 5 scan0104 | |
| Confirming an agreement on modifying steering column controls for Rolls-Royce and Bentley cars. | 11th Aug 1932 | Box 87 \ 5 scan0105 | |
| New schedule for the Bensport steering column support. | 27th Aug 1932 | Box 87 \ 5 scan0106 | |
| Technical memo detailing the controls for the Bensport steering column. | 22th Sep 1932 | Box 87 \ 5 scan0107 | |
| The arrangement of the Bensport side steering tube. | 30th Sep 1932 | Box 87 \ 5 scan0108 | |
| Modifying the 'Bensport' cross steering lever due to 14' brake drums and the proposed removal of its leather cover. | 4th Nov 1932 | Box 87 \ 5 scan0109 | |
| Changes to the ignition and throttle controls on the steering column for the Bensport 1st chassis. | 3rd Jan 1933 | Box 87 \ 5 scan0110 | |
| The design of engine controls for the Bensport Series 1. | 27th Feb 1933 | Box 87 \ 5 scan0111 | |
| Bentley steering geometry, including the 'out of centre point' for different front axles and wheels. | 19th May 1933 | Box 87 \ 5 scan0112 | |
| Data sheet detailing steering pivot lean measurements for Bensport steering at the out of centre point. | 19th May 1933 | Box 87 \ 5 scan0113 | |
| Solution for low-speed wobbles on a Bentley by modifying the cross steering tube balls. | 1st Jul 1933 | Box 87 \ 5 scan0114 | |
| Specifications for new side steering tube springs. | 11th Jul 1933 | Box 87 \ 5 scan0115 | |
| Modified spring for the side steering tube to prevent slow speed wobbles on a Bensport 4 chassis. | 20th Jul 1933 | Box 87 \ 5 scan0116 | |
| The impossibility of fitting a two-note horn to the Bentley chassis. | 25th Jul 1933 | Box 87 \ 5 scan0117 | |
| Modifications required for scaled-down steering on a Bensport vehicle. | 4th Aug 1933 | Box 87 \ 5 scan0118 | |
| The correct position and movement for the horn button on Bentley cars. | 10th Aug 1933 | Box 87 \ 5 scan0119 | |
| Changes to the 3.5 Litre Bentley steering column horn button. | 10th Aug 1933 | Box 87 \ 5 scan0120 | |
| Notice of alteration to specification for a 3 1/2 Litre Bentley horn button steering column. | 10th Aug 1933 | Box 87 \ 5 scan0121 | |
| Parts list for the Bensfort Chassis steering column and box (Peregrine II type), detailing replacements and required standard parts. | 11th Oct 1933 | Box 87 \ 5 scan0122 | |
| Continuation page listing standard parts required and not required for a steering assembly. | 10th Aug 1933 | Box 87 \ 5 scan0123 | |
| Blueprints for a scaled-down steering column and wheel for a Bensport chassis. | 23th Aug 1933 | Box 87 \ 5 scan0124 | |
| Parts list for a scaled-down steering column, dash, and footboards for a Bensport chassis. | 29th Aug 1933 | Box 87 \ 5 scan0125 | |
| Parts list with corresponding part numbers, descriptions, and quantities. | 29th Aug 1933 | Box 87 \ 5 scan0126 | |
| Continued parts list for sections 7050 and 7130, detailing components, quantities and fitment instructions. | 29th Aug 1933 | Box 87 \ 5 scan0127 | |
| Modification to the Bentley side steering tube which was tested in France. | 7th Sep 1933 | Box 87 \ 5 scan0128 | |
| Blueprint cross-section of a spring-loaded rear joint assembly. | 8th Sep 1933 | Box 87 \ 5 scan0129 | |
| Requesting the production and fitting of new side steering tube parts for a Bensport chassis. | 8th Sep 1933 | Box 87 \ 5 scan0130 | |
| | | | |
