| Description | Date | Identifier | |
| Suspension for Wraith and Bentley models and the associated chassis costs. | 19th Nov 1935 | Box 87 \ 4 scan0096 | |
| Letter to Thos. Firth & John Brown Ltd. requesting special low rating Bentley springs with detailed specifications. | 1st Jan 1936 | Box 87 \ 4 scan0097 | |
| Order to be issued for two car sets of special low rating Bentley springs. | 2nd Apr 1936 | Box 87 \ 4 scan0098 | |
| Letter from supplier Thos Firth & John Brown confirming receipt of an order for two sets of Front and Rear Special Low Rating Bentley Springs. | 2nd Jan 1936 | Box 87 \ 4 scan0099 | |
| Letter from Thos Firth & John Brown Ltd enclosing blueprint No.174 for Special Low Rating Bentley Springs. | 3rd Jan 1936 | Box 87 \ 4 scan0100 | |
| Blueprint for special low-rating front and rear road springs for a Bentley chassis. | 3rd Jan 1936 | Box 87 \ 4 scan0101 | |
| Letter to a supplier regarding alterations to front spring stress figures. | 8th Jan 1936 | Box 87 \ 4 scan0102 | |
| Letter from Silentbloc regarding the specifications of bushes for an anti-roll rod assembly. | 17th Mar 1936 | Box 87 \ 4 scan0103 | |
| Request to issue a covering order to Silentbloc Ltd. for bushes required for Bentley front anti-roll rods. | 20th Mar 1936 | Box 87 \ 4 scan0104 | |
| Letter to Silentbloc Ltd. ordering specific bushes for Hartford shock absorbers. | 20th Mar 1936 | Box 87 \ 4 scan0105 | |
| Letter from Silentbloc Limited clarifying part number discrepancies on an order for bearings. | 23th Mar 1936 | Box 87 \ 4 scan0106 | |
| Letter to Silentbloc Ltd. clarifying an order for bushes with chamfered ends. | 24th Mar 1936 | Box 87 \ 4 scan0107 | |
| Letter specifying the requirements for a pair of special Bentley front springs. | 22th Apr 1936 | Box 87 \ 4 scan0108 | |
| Official order for a pair of front springs for a Bentley car. | 22th Apr 1936 | Box 87 \ 4 scan0109 | |
| Letter from Thos Firth & John Brown Ltd regarding a blueprint for Drawing No.181 and stress calculations. | 24th Apr 1936 | Box 87 \ 4 scan0110 | |
| Full-size drawing of special flexible front springs for a Bentley chassis. | 24th Apr 1936 | Box 87 \ 4 scan0111 | |
| Development of independent front wheel springing for Bentley vehicles. | 27th Mar 1936 | Box 87 \ 4 scan0112 | |
| Selection of suspension systems for Wraith II and Bentley models, comparing weights, costs, and development strategies. | 27th Mar 1936 | Box 87 \ 4 scan0113 | |
| Compatibility of a Citroen front suspension with an existing car frame. | 27th Mar 1936 | Box 87 \ 4 scan0114 | |
| Table comparing the weights of various chassis front end parts for Bentley, 25 HP, Ph.III, and Wraith models. | 1st May 1936 | Box 87 \ 4 scan0115 | |
| Letter to Richard Klinger Ltd. regarding testing their graphitic leaf spring interlays on a Bentley front spring. | 1st May 1936 | Box 87 \ 4 scan0116 | |
| Letter to a supplier confirming a conversation regarding an order for front springs for 25 HP and Bentley models. | 7th May 1936 | Box 87 \ 4 scan0117 | |
| Correspondence from Richard Klinger Ltd. about the supply and fitting of Spring Interlay for a Bentley car. | 7th May 1936 | Box 87 \ 4 scan0118 | |
| Letter to Messrs. Richard Klinger Ltd. regarding the sending of a Bentley front spring for testing with their interlays. | 8th May 1936 | Box 87 \ 4 scan0119 | |
| Instruction to send a Bentley front spring to Richard Klinger Ltd. to be fitted with anti-friction interlays. | 9th May 1936 | Box 87 \ 4 scan0120 | |
| Summary of communications with Firth's regarding the cost and delivery of rubber shackle springs. | 21th May 1936 | Box 87 \ 4 scan0121 | |
| Technical memo reviewing Citroen's torsion bar suspension, with comparisons to existing models and a recommendation to purchase one for further study. | 21th May 1936 | Box 87 \ 4 scan0122 | |
| Quotation from Richard Klinger Ltd. regarding the fitting of an Interlay to a Bentley Front Spring. | 22th May 1936 | Box 87 \ 4 scan0123 | |
| Quotation from Richard Klinger Ltd. for Klinger Spring Interlay. | 22th May 1936 | Box 87 \ 4 scan0124 | |
| Alternative independent suspension programmes for Bentley, comparing various systems. | 29th May 1936 | Box 87 \ 4 scan0125 | |
| The merits and challenges of implementing a torsion bar suspension system. | 7th Apr 1936 | Box 87 \ 4 scan0126 | |
| Letter from a supplier discussing the cost differences for various types of road springs based on production quantities. | 20th May 1936 | Box 87 \ 4 scan0127 | |
| Cost comparison from Thos. Firth & John Brown Ltd. detailing the difference between 'Solid Eyes' and 'Rolled Eyes' for springs. | 5th Jun 1936 | Box 87 \ 4 scan0128 | |
| Letter to Richard Klinger Ltd. regarding the unsatisfactory testing of sample spring interlays on a Bentley. | 5th Jun 1936 | Box 87 \ 4 scan0129 | |
| Trial and results of fitting independent suspension to a Bentley. | 19th Aug 1936 | Box 87 \ 4 scan0130 | |
| Fitting an independent front suspension to a Bentley chassis, weighing modifications against a new design. | 19th Aug 1936 | Box 87 \ 4 scan0131 | |
| Design experiments, engine modifications, and the potential introduction of a new car model. | 19th Aug 1936 | Box 87 \ 4 scan0132 | |
| The results of tests performed on a Bentley Roll Rod Lever and shaft. | 25th Aug 1936 | Box 87 \ 4 scan0133 | |
| Outdated suspension on the Bentley and proposing it for discussion. | 25th Aug 1936 | Box 87 \ 4 scan0134 | |
| Design and challenges of an independent torsion bar suspension for a Bentley. | 29th Aug 1936 | Box 87 \ 4 scan0135 | |
| Letter from Gordon Armstrong Patent Suspension requesting two off-set wheels for a Bentley car. | 5th Sep 1936 | Box 87 \ 4 scan0136 | |
| Letter from Dunlop Rubber Co. Ltd. confirming instructions for two 3.25x18 Bentley Wire wheels for experimental purposes. | 8th Sep 1936 | Box 87 \ 4 scan0137 | |
| The Bentley Torsion Bar Suspension system and related steering layouts. | 21th Sep 1936 | Box 87 \ 4 scan0138 | |
| Diagram of a front axle with steering linkage and torsion bars. | 21th Sep 1936 | Box 87 \ 4 scan0139 | |
| Diagram illustrating a steering system layout, labeled as Figure II. | 7th Oct 1936 | Box 87 \ 4 scan0140 | |
| Request to fit a pair of 1000 lbs production rear springs to car 5-B-RV. | 7th Oct 1936 | Box 87 \ 4 scan0141 | |
| Design, materials, and modifications for the Bentley III Independent Front Suspension. | 23th Nov 1936 | Box 87 \ 4 scan0142 | |
| Letter to the English Steel Corporation regarding the poundage of special road springs FW.756. | 24th Nov 1936 | Box 87 \ 4 scan0143 | |
| The removal of four bosses on the Bentley III front suspension forging. | 7th Dec 1936 | Box 87 \ 4 scan0144 | |
| The replacement of front road springs for car 3-B-IV. | 21th Dec 1936 | Box 87 \ 4 scan0145 | |
| Letter from English Steel Corporation regarding the production of Bentley Rear Springs and their inability to Cadmium plate them. | 21th Dec 1936 | Box 87 \ 4 scan0146 | |
| Letter to Thomas Firth & John Brown Ltd concerning the fitting of jacking pads to spring RB.2171 for a Bentley. | 21th Dec 1936 | Box 87 \ 4 scan0147 | |
| Letter from a supplier confirming arrangements to fit Jacking Pads to springs on a Bentley. | 23th Dec 1936 | Box 87 \ 4 scan0148 | |
| Letter to English Steel Corporation Ltd. regarding the cadmium plating of Bentley Springs. | 23th Dec 1936 | Box 87 \ 4 scan0149 | |
| Request to machine rear spring bottom plates to drawing FB.2087 due to a stress failure on car 6-B-IV. | 24th Dec 1936 | Box 87 \ 4 scan0150 | |
| Letter from English Steel Corporation regarding special springs for a Bentley car and their cadmium plating. | 28th Dec 1936 | Box 87 \ 4 scan0151 | |
| Letter from English Steel Corporation acknowledging an order for 1 pair of Rear Axle Springs for a 'Bentley' Chassis. | 28th Dec 1936 | Box 87 \ 4 scan0152 | |
| Requesting the fitting of another pair of Gordon Armstrong shock dampers to the rear of a Bentley Bumper Chassis. | 29th Dec 1936 | Box 87 \ 4 scan0153 | |
| Comparison table of spring rates, buffer clearances, and poundage for various vehicle models. | 26th Jan 1937 | Box 87 \ 4 scan0154 | |
| Potential cost saving on Bentley chassis road springs from Messrs. Firth & John Brown. | 26th Jan 1937 | Box 87 \ 4 scan0155 | |
| Letter from Thos Firth & John Brown Ltd chasing a promised full report. | 27th Jan 1937 | Box 87 \ 4 scan0156 | |
| Cost-saving potential of using rolled eyes for road springs on Bentley chassis and requesting a quick decision. | 3rd Feb 1937 | Box 87 \ 4 scan0157 | |
| Agreement to use rolled eye springs on production without the usual running test. | 3rd Feb 1937 | Box 87 \ 4 scan0158 | |
| Instructions to swap a 'Stabilus' anti-roll system and refit springs between two specified vehicles. | 22th Feb 1937 | Box 87 \ 4 scan0159 | |
| Instruction to change over the rear springs on specific cars. | 8th Jun 1937 | Box 87 \ 4 scan0160 | |
| Return of two faulty Bentley front anchorage brackets due to the ball pin slot being too wide. | 23th Jun 1937 | Box 87 \ 4 scan0161 | |
| Accessibility issues with the front spring and shackle pins due to the bodywork. | 24th Aug 1937 | Box 87 \ 4 scan0162 | |
| The use of mild steel for front suspension parts, referencing Packard and Bentley designs. | 22th Nov 1937 | Box 87 \ 4 scan0163 | |
| Using up old stock of Bentley Front Axle Springs with riveted jacking pads and an extra leaf. | 24th Oct 1938 | Box 87 \ 4 scan0164 | |
| The change of specification for Bentley Axle Springs from 800 lbs to 750 lbs. | 23th Dec 1938 | Box 87 \ 4 scan0165 | |
| Sketches of various engine components including pistons and cylinder cross-sections. | 30th Nov 1932 | Box 87 \ 5 scan0001 | |
| Raising questions about the lubrication of the servo drive in the Bensport gearbox. | 30th Nov 1932 | Box 87 \ 5 scan0002 | |
| The general arrangement of the brake servo and balance lever, referencing schemes 3604 and 3610. | 30th Nov 1932 | Box 87 \ 5 scan0003 | |
| Design, advantages, and drawbacks of a Bensport shoe-type servo system. | 30th Nov 1932 | Box 87 \ 5 scan0004 | |
| Design and effectiveness of servo-assisted braking systems, specifically for the Peregrine model and proposals for new servo designs. | 12th Dec 1932 | Box 87 \ 5 scan0005 | |
| Technical memorandum discussing modifications to the reverse gear and lubrication of the servo drive for Phantom II synchromesh gearboxes. | 12th Dec 1932 | Box 87 \ 5 scan0006 | |
| Gearbox lubrication performance on various gradients. | 12th Dec 1932 | Box 87 \ 5 scan0007 | |
| Modifications to the Bensport Servo to reduce friction. | 19th Dec 1932 | Box 87 \ 5 scan0008 | |
| The use of an oil dashpot for the 25HP and Bensport servo brake linkage. | 25th Apr 1933 | Box 87 \ 5 scan0009 | |
| Agreement memo regarding 45° cams for the Bentley servo. | 27th May 1933 | Box 87 \ 5 scan0010 | |
| Recommending fitting a washer to the Bensport Servo to correct star spring clearance issues. | 30th May 1933 | Box 87 \ 5 scan0011 | |
| The correct gap for the Bensport servo star springs. | 5th Jul 1933 | Box 87 \ 5 scan0012 | |
| Requesting modifications to the drawings for the 20/25 & Bensport Servo GL.609. | 21th Jul 1933 | Box 87 \ 5 scan0013 | |
| Modifications to the Servo Motor Mechanism for the 20/25-HP & Bensport models to prevent the spreading of cotton friction lining. | 24th Jul 1933 | Box 87 \ 5 scan0014 | |
| Requesting a modified servo and a dashpot. | 1st Aug 1933 | Box 87 \ 5 scan0015 | |
| Suggestion to change the outer ring G.55341 on servo cams from a press fit to a sliding fit to prevent sticky operation. | 1st Sep 1933 | Box 87 \ 5 scan0016 | |
| Recommending fitting a plug to the servo countershaft housing on production cars. | 20th Oct 1933 | Box 87 \ 5 scan0017 | |
| Unsatisfactory oil drainage issue with a servo countershaft and proposing a potential fix. | 28th Oct 1933 | Box 87 \ 5 scan0018 | |
| Standardisation of baffles to prevent oil working along the servo countershaft, scheme EX.12576. | 4th Nov 1933 | Box 87 \ 5 scan0019 | |
| Modifications to a fully floating servo for a 10,000 mile car. | 23th Dec 1933 | Box 87 \ 5 scan0020 | |
| Application of a ball journal bearing versus a needle bearing for the 20/25 and Bentley servo shaft. | 2nd Jan 1934 | Box 87 \ 5 scan0021 | |
| Request to construct a servo output measuring rig for 20/25 and Bentley servo tests. | 10th Feb 1934 | Box 87 \ 5 scan0022 | |
| Modifications to servo driving pins and lining materials for 20/25 and Bentley models. | 1st Mar 1934 | Box 87 \ 5 scan0023 | |
| Servo tests for the 20/25 and Bentley models to determine brake mechanism distribution. | 26th Mar 1934 | Box 87 \ 5 scan0024 | |
| Analysis of servo output distribution and friction effects in forward and reverse gears. | 27th Apr 1934 | Box 87 \ 5 scan0025 | |
| Request for a new type of Bentley servo (GL.713) for the purpose of carrying out tests. | 27th Apr 1934 | Box 87 \ 5 scan0026 | |
| Request to reline servos on cars 21-G-IV & 4-B-IV with 'roasted' RAD-13 linings before they are sent to France. | 26th Jun 1934 | Box 87 \ 5 scan0027 | |
| Standardisation of parts document for a fully floating servo. | 18th Oct 1934 | Box 87 \ 5 scan0028 | |
| Estimate for the cost of extra jigs, tools, and equipment for the 'E' series chassis. | 21th Sep 1934 | Box 87 \ 5 scan0029 | |
| The mechanical efficiency of a Bentley and 25 HP servo motor and the efficiency of its servo linings. | 26th Oct 1934 | Box 87 \ 5 scan0030 | |
| | | | |
