| Description | Date | Identifier | |
| Requesting the creation of drawings and manufacture of an E.A.C. Engine Front Bearer Tube in nickel steel. | 2nd Mar 1925 | Box 65 \ 4 scan0046 | |
| Spare wheel carriers, front engine suspension, and bumpers. | 2nd Mar 1926 | Box 65 \ 4 scan0047 | |
| Use of a damper for mounting the Eagle 16 engine to steady movement. | 16th Apr 1926 | Box 65 \ 4 scan0048 | |
| Issues with back axle controls, universal joints, and torque tube control. | 21th Apr 1926 | Box 65 \ 4 scan0049 | |
| Requesting the creation of parts for engine mounts and a magneto adaptor, with an enquiry about sourcing improved fabric discs. | 8th Oct 1926 | Box 65 \ 4 scan0050 | |
| Mean Effective Pressure limitations due to detonation and reaction vibrations. | 11th Sep 1926 | Box 65 \ 4 scan0051 | |
| Internal memorandum detailing a proposed front axle control system for the Phantom model, using the spring and shock damper as control arms. | 4th Dec 1926 | Box 65 \ 4 scan0052 | |
| Modifications to the Phantom Front Axle Control and engine torque dampers. | 12th Sep 1926 | Box 65 \ 4 scan0053 | |
| Location and potential issues with the 40/50 HP torque arm and hydraulic damper. | 13th Dec 1926 | Box 65 \ 4 scan0054 | |
| Blueprint showing the location of the 40/50 Torque Arm. | 10th Dec 1926 | Box 65 \ 4 scan0055 | |
| The 10-EX engine suspension, detailing the objective of a 4-point support system to test frame rigidity and its effect on steering. | 25th Oct 1927 | Box 65 \ 4 scan0056 | |
| The examination and testing of Mr. E. Feuerheerd's pump. | 1st Nov 1927 | Box 65 \ 4 scan0057 | |
| Recommendation for an engine suspension scheme to improve smoothness and reduce vibrations. | 1st Nov 1927 | Box 65 \ 4 scan0058 | |
| Test on a four-point engine suspension system to reduce vibration. | 1st Nov 1927 | Box 65 \ 4 scan0059 | |
| Blueprint detailing the rear engine mounting for the 10EX model, featuring a Hardy rubber-fabric coupling. | 6th Nov 1927 | Box 65 \ 4 scan0060 | |
| The engine suspension design for the EAC.10 Sports Phantom. | 6th Nov 1927 | Box 65 \ 4 scan0061 | |
| New rubber rear engine suspension system for the EAC.14. | 22th Nov 1927 | Box 65 \ 4 scan0062 | |
| Letter to Mr. Dodd concerning weak engine mounting brackets and the dispatch of stronger replacements. | 16th Dec 1927 | Box 65 \ 4 scan0063 | |
| Sending a rubber block to Messrs. Dunlop for reproduction as car engine mountings. | 21th Dec 1927 | Box 65 \ 4 scan0064 | |
| Letter to the Dunlop Rubber Co. requesting the reproduction of a rubber block. | 21th Dec 1927 | Box 65 \ 4 scan0065 | |
| Letter to The Dunlop Rubber Co. specifying the load requirements for a rubber mounting block. | 30th Dec 1927 | Box 65 \ 4 scan0066 | |
| Letter to The Dunlop Rubber Co. regarding rubber block samples and a request for more for experimental purposes. | 11th Jan 1928 | Box 65 \ 4 scan0067 | |
| Official order be placed with Messrs. Dunlops for rubber pads for engine mountings. | 1st Jan 1928 | Box 65 \ 4 scan0068 | |
| Requesting the preparation of replacement steel strips for a rubber engine mounting. | 11th Jan 1928 | Box 65 \ 4 scan0069 | |
| Torque reaction issues and experimental testing on a sports car with different engine mounting configurations. | 24th Jan 1928 | Box 65 \ 4 scan0070 | |
| Engine mounting test for torque reaction and the resulting vibrations. | 24th Jan 1928 | Box 65 \ 4 scan0071 | |
| Graph detailing the load versus deflection characteristics for a torque reaction fixed front mounting. | 25th Jan 1928 | Box 65 \ 4 scan0072 | |
| Torque reaction and vibration testing after fitting a rubber block to the dash. | 25th Jan 1928 | Box 65 \ 4 scan0073 | |
| Difficulties with torque reaction in a sports car and the effects of different engine setups. | 30th Jan 1928 | Box 65 \ 4 scan0074 | |
| Damping and vibration issues related to the Continental Phantom. | 31th Jan 1928 | Box 65 \ 4 scan0075 | |
| Recommending improved engine mounting plates and rubbers for the EAC.14 chassis following successful testing. | 31th Jan 1928 | Box 65 \ 4 scan0076 | |
| Damping scheme for engine torque vibrations, referencing a sketch. | 2nd Mar 1928 | Box 65 \ 4 scan0077 | |
| Query on the feasibility of a damper design combining dry friction with lubrication for its diametral fit. | 5th Mar 1928 | Box 65 \ 4 scan0078 | |
| The implementation of a new rubber engine suspension for the Phantom Chassis F-2 and G-2 series. | 4th Apr 1928 | Box 65 \ 4 scan0079 | |
| Scheme for a flexible engine mounting on the 10-EX model to prevent the engine from dropping. | 11th Jun 1928 | Box 65 \ 4 scan0080 | |
| Specifications and quality control notes for the Phantom's rubber engine mounting. | 14th Aug 1928 | Box 65 \ 4 scan0081 | |
| Internal memorandum addressing production issues with rubber consistency and altering deflection test parameters. | 9th Sep 1928 | Box 65 \ 4 scan0082 | |
| The length tolerances for engine rubber mounting rubbers. | 10th Sep 1928 | Box 65 \ 4 scan0083 | |
| Technical note regarding the correct reamed fit for bolts on a rubber engine mounting to prevent issues from vibration. | 8th Sep 1928 | Box 65 \ 4 scan0084 | |
| The return of two tested rubber parts for a 40/50 HP car to Dunlop for inspection. | 20th Sep 1928 | Box 65 \ 4 scan0085 | |
| Letter to Dunlop Rubber Co. Ltd. regarding issues with rubber engine mountings for the 40/50 HP car. | 20th Sep 1928 | Box 65 \ 4 scan0086 | |
| Issues from a bump test, requesting replacement engine feet and a modified front axle for an endurance test. | 21th Sep 1928 | Box 65 \ 4 scan0087 | |
| Letter from Dunlop Rubber Co. Ltd. to Mr. Hives at Rolls-Royce, requesting details on the usage conditions for two rubber buffers that were returned for inspection. | 21th Sep 1928 | Box 65 \ 4 scan0088 | |
| Letter to Dunlop Rubber Co. Ltd. proposing a meeting to discuss tyres, engine mounts, and aero engine cylinder joints. | 22th Sep 1928 | Box 65 \ 4 scan0089 | |
| Visit to Dunlop Rubber Co. regarding new 'Fort' and 'Super' tyre models. | 25th Sep 1928 | Box 65 \ 4 scan0090 | |
| Report discussing tyre shimmy, with a table of Dunlop tyre figures, and notes on rubber engine feet and rubber cylinder joints. | 29th Sep 1928 | Box 65 \ 4 scan0091 | |
| Letter from Dunlop Rubber Co. Ltd. discussing the properties and specifications for rubber engine mountings. | 29th Sep 1928 | Box 65 \ 4 scan0092 | |
| Letter to Dunlop Rubber Co. requesting the production of sample rubber blocks with modified specifications for testing. | 3rd Oct 1928 | Box 65 \ 4 scan0093 | |
| Issues with 20 HP valve inlets sticking and an analysis of Phantom power curves. | 17th Oct 1928 | Box 65 \ 4 scan0094 | |
| Engine experiments concerning compression ratio, piston rings, and torque reaction. | 17th Oct 1928 | Box 65 \ 4 scan0095 | |
| Continued memo discussing the ratings of two couplings and details of a Chrysler spring drive. | 17th Oct 1928 | Box 65 \ 4 scan0096 | |
| Graph comparing Torque versus Angular Deflection for Standard Hardy and Alpe couplings. | 9th Oct 1928 | Box 65 \ 4 scan0097 | |
| Letter from Dunlop Rubber Co. regarding rubber engine mountings and cylinder joints. | 9th Oct 1928 | Box 65 \ 4 scan0098 | |
| Hand-drawn sketch of a mechanical component with annotations and measurements on the reverse of a typed memo. | 12th Oct 1928 | Box 65 \ 4 scan0099 | |
| Letter to Dunlop Ltd. concerning the progress of rubber blocks. | 22th Oct 1928 | Box 65 \ 4 scan0100 | |
| Measurement of drive flexibility and its effect on couplings and flywheel inertia. | 25th Oct 1928 | Box 65 \ 4 scan0101 | |
| Recommendation to fit rubber engine mountings to car 24-CL to eliminate roughness between 40-50 mph. | 31th Oct 1928 | Box 65 \ 4 scan0102 | |
| Follow-up regarding the fitment of a rubber engine mounting modification to address a high-speed roughness complaint. | 1st Nov 1928 | Box 65 \ 4 scan0103 | |
| Visit to the Dunlop Works to discuss the non-skid life of tyres following customer complaints about skidding. | 28th Nov 1928 | Box 65 \ 4 scan0104 | |
| Continuation page of a report discussing experimental rubber mixings to increase the load capacity for the 40/50 model. | 6th Nov 1928 | Box 65 \ 4 scan0105 | |
| Letter to The Dunlop Rubber Co. concerning details of a rubber cylinder joint and a request for harder rubber blocks for engine mountings. | 6th Nov 1928 | Box 65 \ 4 scan0106 | |
| Extract detailing the thermal expansion and failure analysis of a rubber cylinder joint. | 6th Nov 1928 | Box 65 \ 4 scan0107 | |
| Cross-section drawing of an FXI Cylinder Joint with dimensions. | 1st Oct 1928 | Box 65 \ 4 scan0108 | |
| Design drawing of an F.XI rubber cylinder joint with dimensions and thermal expansion calculations. | 1st Oct 1928 | Box 65 \ 4 scan0109 | |
| Letter from Dunlop Rubber Co. regarding rubber compound samples and a cylinder joint ring. | 9th Nov 1928 | Box 65 \ 4 scan0110 | |
| Letter from Dunlop Rubber Co. Ltd. following up on sample buffer blocks and requesting compression test details. | 29th Nov 1928 | Box 65 \ 4 scan0111 | |
| Experiments with rubber engine mountings for the Phantom, exploring the possibility of avoiding drilling the rubbers. | 28th Dec 1928 | Box 65 \ 4 scan0112 | |
| Specifying deflection under load for rubber components ordered from Messrs. Dunlop and discussing material mix experiments. | 4th Dec 1928 | Box 65 \ 4 scan0113 | |
| Letter to Dunlop Rubber Co. regarding testing and specifications for sample rubber blocks for an engine foot. | 4th Dec 1928 | Box 65 \ 4 scan0114 | |
| Letter discussing specifications and requesting new orders for rubber components. | 4th Dec 1928 | Box 65 \ 4 scan0115 | |
| Graph showing deflection versus load for various types of engine foot rubbers. | 4th Dec 1928 | Box 65 \ 4 scan0116 | |
| Order for three types of engine rubbers from Messrs. Dunlop. | 5th Dec 1928 | Box 65 \ 4 scan0117 | |
| New specifications, testing issues, and quality control procedures for rubber engine mountings. | 7th Dec 1928 | Box 65 \ 4 scan0118 | |
| Concluding on the inconsistency and poor quality of rubber mixes from Mr. Jones of the Dunlop Co. | 7th Dec 1928 | Box 65 \ 4 scan0119 | |
| Depot sheet describing issues with fabric couplings causing excessive torque re-action and roughness on pick-up. | 7th Dec 1928 | Box 65 \ 4 scan0120 | |
| Correspondence from Dunlop about the hardness of experimental rubber blocks, compound No. 4 and No. 5. | 8th Dec 1928 | Box 65 \ 4 scan0121 | |
| Unsatisfactory performance of rubber engine feet bolts and proposing the use of tight-fitting bolts as a solution. | 12th Dec 1928 | Box 65 \ 4 scan0122 | |
| Blueprint showing section and elevation views of a mechanical component. | 15th Dec 1928 | Box 65 \ 4 scan0123 | |
| Letter from Dunlop Rubber Co. Ltd. following up on supplying rubber engine feet and arranging a meeting in Derby. | 15th Dec 1928 | Box 65 \ 4 scan0124 | |
| Letter to Dunlop Rubber Co. regarding the specification for engine foot rubbers, requesting harder samples. | 22th Dec 1928 | Box 65 \ 4 scan0125 | |
| Letter to Dunlop Rubber Co. Ltd. regarding the weakness of engine foot rubber samples and requesting a new mix. | 31th Dec 1928 | Box 65 \ 4 scan0126 | |
| Letter from Dunlop Rubber Co. Ltd. regarding the development, testing, and supply of new Engine Foot Rubber blocks. | 1st Jan 1929 | Box 65 \ 4 scan0127 | |
| The testing and sourcing of rubber engine feet from The Dunlop Co. | 3rd Jan 1929 | Box 65 \ 4 scan0128 | |
| Rating test graph for F.78114 Engine Foot Rubbers, plotting load in pounds against deflection in inches. | 2nd Jan 1929 | Box 65 \ 4 scan0129 | |
| Rating test results for engine foot rubbers supplied by Dunlops, measuring deflection under load. | 3rd Jan 1929 | Box 65 \ 4 scan0130 | |
| Letter to The Dunlop Rubber Co. discussing the consistency and specifications of rubber compounds. | 3rd Jan 1929 | Box 65 \ 4 scan0131 | |
| Test report on Phantom engine supporting rubbers, mix no. 6. | 7th Jan 1929 | Box 65 \ 4 scan0132 | |
| Requesting a Phantom Trials car to act as a standard for frame jellying and booming tests. | 6th Mar 1929 | Box 65 \ 4 scan0133 | |
| The design and characteristics of the S.S. suspension system. | 18th Sep 1929 | Box 65 \ 4 scan0134 | |
| Shock absorber adjustments to improve riding qualities and overcome issues of insufficient firmness at high speeds. | 4th Oct 1929 | Box 65 \ 4 scan0135 | |
| Arrangements for a trial of 'American spring and shock absorber modifications' on car 43-KR. | 4th Oct 1929 | Box 65 \ 4 scan0136 | |
| Testing and potential delay of springing work on the 43-KR car. | 7th Oct 1929 | Box 65 \ 4 scan0137 | |
| Arrangement of an experimental car, referencing chassis 43-KR. | 9th Oct 1929 | Box 65 \ 4 scan0138 | |
| The springing on car 43-KR and arranging a car trial for Messrs. Olley and Southern. | 10th Oct 1929 | Box 65 \ 4 scan0139 | |
| From Sg. to Hs. regarding travel arrangements for a person named Kennett. | 15th Oct 1929 | Box 65 \ 4 scan0140 | |
| Improvements to the springing and ride quality of vehicle 43-KR. | 21th Oct 1929 | Box 65 \ 4 scan0141 | |
| Test report on the springing and shock absorber performance of Mr. Sidgreaves' car 43-KR, before and after alterations. | 18th Oct 1929 | Box 65 \ 4 scan0142 | |
| Road test report on the car's riding quality and springing performance. | 22th Oct 1929 | Box 65 \ 4 scan0143 | |
| Alteration to shock absorbers to resolve a 'dithering' issue at low speeds. | 22th Oct 1929 | Box 65 \ 4 scan0144 | |
| Test results and modifications to the springing of the 43-KR car. | 22th Oct 1929 | Box 65 \ 4 scan0145 | |
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