| Description | Date | Identifier | |
| Engine mounting experiments and a proposed method for damping vibrations using the mass of the vehicle's body and frame. | 4th Feb 1928 | Box 14 \ 5 Scan007 | |
| Scheme for handling first speed and reverse torque, and the potential issues with chassis inertia. | 20th Feb 1928 | Box 14 \ 5 Scan008 | |
| Overcoming engine mounting troubles based on experimental observations of torque reaction and frame distortion. | 20th Feb 1928 | Box 14 \ 5 Scan009 | |
| Query about designing a damper with both dry friction and lubrication, similar to a friction clutch. | 5th Mar 1928 | Box 14 \ 5 Scan010 | |
| Engine suspension for the EAC.10 model, detailing the use of rubber mountings to prevent crankcase torsion. | 7th Mar 1928 | Box 14 \ 5 Scan011 | |
| Use of rubber and torsional dampers for engine suspension. | 9th Mar 1928 | Box 14 \ 5 Scan012 | |
| Low-speed vibrations related to rear engine suspension and a proposal for testing. | 4th Apr 1928 | Box 14 \ 5 Scan013 | |
| The development and testing of rubber engine mountings for the Phantom model. | 1st Apr 1928 | Box 14 \ 5 Scan014 | |
| Standardisation of rear engine suspension using spring steel dual plates and diabolo rubber buffers to dampen engine vibrations. | 23th Mar 1928 | Box 14 \ 5 Scan015 | |
| Chassis number, test date, and costs for a new part. | 27th Aug 1928 | Box 14 \ 5 Scan016 | |
| Proposing a scheme for a flexible engine mounting on the 10-EX model. | 11th Jun 1928 | Box 14 \ 5 Scan017 | |
| Request to alter the rubber engine mounting and modify pivots for 10-EX. | 6th May 1928 | Box 14 \ 5 Scan018 | |
| Specifications and testing procedures for the Phantom model's rubber engine mounting blocks. | 4th Aug 1928 | Box 14 \ 5 Scan019 | |
| Requesting to reamer bolt holes in a rubber engine mounting on 12-EX for testing. | 19th Sep 1928 | Box 14 \ 5 Scan020 | |
| Damped pendulum lever adapted as a spring drive for the Phantom, to be fitted to models 10-EX or 17-EX to reduce torque reaction. | 21th Sep 1928 | Box 14 \ 5 Scan021 | |
| Blueprint showing the adaptation of part F73576 as a spring drive on a Phantom model. | 20th Sep 1928 | Box 14 \ 5 Scan022 | |
| Suggesting engine mounting suspension adjustments to reduce high-speed wobbles. | 11th Oct 1928 | Box 14 \ 5 Scan023 | |
| Request for a 40/50 rear engine rubber mounting foot and new front springs for the 8-EX car for testing purposes. | 17th Oct 1928 | Box 14 \ 5 Scan024 | |
| Experiments on engine compression ratios, torque reactions, and carburettor improvements for the SS engine. | 17th Oct 1928 | Box 14 \ 5 Scan025 | |
| Improvements to comfortable riding and reducing vibrations through suspension and damping adjustments. | 19th Nov 1928 | Box 14 \ 5 Scan026 | |
| Experiments with rubber engine mountings on the Phantom model to avoid drilling them. | 1st Dec 1928 | Box 14 \ 5 Scan027 | |
| Specifications for rubber components ordered from Dunlop, including deflection limits, testing, and material mixes. | 12th Dec 1928 | Box 14 \ 5 Scan028 | |
| Depot sheet on the issues caused by a distorted or failing fabric coupling and the recommended action. | 12th Dec 1928 | Box 14 \ 5 Scan029 | |
| Unsatisfactory performance of bolts on rubber engine feet and suggesting the use of tight-fitting tapered bolts. | 2nd Dec 1928 | Box 14 \ 5 Scan030 | |
| Blueprint showing a cross-section and side view of a mechanical clamp or mounting bracket assembly. | 12th Dec 1928 | Box 14 \ 5 Scan031 | |
| Heavily faded document with a purple 'Print Room' stamp. | 12th Dec 1928 | Box 14 \ 5 Scan032 | |
| Instruction to fit four solid engine feet and an experimental bracket to chassis 19-EX. | 13th Dec 1928 | Box 14 \ 5 Scan033 | |
| The causes of and potential solutions for 'radiator shiver' vibrations. | 17th Dec 1928 | Box 14 \ 5 Scan034 | |
| The difficulties of fitting taper bolts for rubber engine feet and a proposed improvement. | 18th Dec 1928 | Box 14 \ 5 Scan035 | |
| Requesting modifications to car 19-EX, including engine feet, gearbox support, and brakes. | 19th Dec 1928 | Box 14 \ 5 Scan036 | |
| Telegram from Hives expressing thanks for road test reports concerning engine mounting and radiator vibration. | 31th Dec 1928 | Box 14 \ 5 Scan037 | |
| Design suggestions for the 'SS' chassis, covering the starter motor, engine mounting, and length. | 25th Dec 1928 | Box 14 \ 5 Scan038 | |
| Chassis length, weight distribution, and a proposed design for flexible engine mounting. | 3rd Jan 1929 | Box 14 \ 5 Scan039 | |
| Letter to Dunlop Rubber Co. Ltd. clarifying a previous error regarding rubber requirements and confirming deliveries. | 3rd Jan 1929 | Box 14 \ 5 Scan040 | |
| Rating test graph showing load versus deflection for engine foot rubbers supplied by Dunlop. | 2nd Jan 1929 | Box 14 \ 5 Scan041 | |
| Rating test graph showing load versus deflection for engine foot rubbers supplied by Dunlop. | 2nd Jan 1929 | Box 14 \ 5 Scan042 | |
| Rating test results for engine foot rubbers supplied by Dunlops. | 3rd Jan 1929 | Box 14 \ 5 Scan043 | |
| Rating test results for engine foot rubbers, showing deflection measurements under various loads. | 3rd Jan 1929 | Box 14 \ 5 Scan044 | |
| Alternative engine mounting solutions to address chassis and radiator vibrations, and comparing 6-cylinder and 8-cylinder engines. | 1st Mar 1929 | Box 14 \ 5 Scan045 | |
| Test results and issues with gearbox anchorage, handling, and exhaust manifolds on a 20 HP and an SS model. | 1st Jan 1929 | Box 14 \ 5 Scan046 | |
| Testing schemes for SS engine mounting to address roughness and vibration issues. | 5th Jan 1929 | Box 14 \ 5 Scan047 | |
| Experiments with rubber isolated engine mountings for the 'SS' engine to reduce vibration. | 1st Jan 1929 | Box 14 \ 5 Scan048 | |
| Continued memorandum regarding ineffective dampers and tests on a 20 HP car. | 7th Jan 1929 | Box 14 \ 5 Scan049 | |
| Blueprint showing the design for experimental engine feet. | 7th Jan 1929 | Box 14 \ 5 Scan050 | |
| Letter from Dunlop Rubber Co. regarding a delay and process for an order of No. 6 mixing. | 7th Jan 1929 | Box 14 \ 5 Scan051 | |
| And comparing different engine mounting systems, specifically on SS chassis and a Chrysler car. | 7th Jan 1929 | Box 14 \ 5 Scan052 | |
| Engine mounting systems, comparing fabric disc and rubber liner feet for improved smoothness and frame steadiness. | 8th Jan 1929 | Box 14 \ 5 Scan053 | |
| The promising results of 'SS' engine mounting tests using strip rubber to reduce vibration and improve steering. | 8th Jan 1929 | Box 14 \ 5 Scan054 | |
| Test results and feedback for the 'SS' engine mounting. | 8th Jan 1929 | Box 14 \ 5 Scan055 | |
| Benefits of torsional rigidity for car control and the undesirability of reverting to a flexible frame. | 10th Jan 1929 | Box 14 \ 5 Scan056 | |
| Comparison report on the 'SS' engine mounting against the standard Phantom, focusing on radiator rigidity, engine vibrations, and steering. | 10th Jan 1929 | Box 14 \ 5 Scan057 | |
| Comparison of vehicle performance focusing on high-speed wobble, engine vibration, and steering under different tyre pressures. | 10th Jan 1929 | Box 14 \ 5 Scan058 | |
| Report comparing the steering performance and characteristics of various experimental car models at speed and during shunting. | 10th Jan 1929 | Box 14 \ 5 Scan059 | |
| Summary of test results regarding front-end oscillation and potential solutions including frame rigidity, engine mounting, and balance weights. | 12th Jan 1929 | Box 14 \ 5 Scan060 | |
| Tests and modifications to the 'SS' engine mounting to reduce vibrations and exhaust booming. | 12th Jan 1929 | Box 14 \ 5 Scan061 | |
| Letter to The Dunlop Rubber Co. regarding an order for No. 6 mix. | 14th Jan 1929 | Box 14 \ 5 Scan062 | |
| Engine mounting solutions to address frame vibrations and high-speed wobble for the 'SS' and 20 HP models. | 14th Jan 1929 | Box 14 \ 5 Scan063 | |
| Design of an engine back plate and its mounting system. | 16th Jan 1929 | Box 14 \ 5 Scan064 | |
| Letter from Dunlop Rubber Co. discussing orders and specifications for rubber blocks and mixing. | 16th Jan 1929 | Box 14 \ 5 Scan065 | |
| Letter to Dunlop Rubber Co. Ltd. regarding a delivery of engine feet rubbers that do not meet the required specifications for poundage and deflection. | 17th Jan 1929 | Box 14 \ 5 Scan066 | |
| Page 2 of a letter regarding poundage figures and delivery dates under a new scheme. | 17th Jan 1929 | Box 14 \ 5 Scan067 | |
| Tests on 'SS' engine and body mountings to reduce vibration and front end movement. | 21th Jan 1929 | Box 14 \ 5 Scan068 | |
| Experiments to prevent body yawing and improve frame rigidity, noting road tests are delayed by weather. | 27th Jan 1928 | Box 14 \ 5 Scan069 | |
| Outlining improvements and the continuation of trials in France for the SS and 20 HP G.4 models. | 27th Jan 1928 | Box 14 \ 5 Scan070 | |
| Design discussion memo regarding exhaust systems and flexible engine mountings, with hand-drawn sketches. | 30th Jan 1929 | Box 14 \ 5 Scan071 | |
| Continued memorandum discussing design suggestions and urging the recipient to make the final decision. | 1st Feb 1929 | Box 14 \ 5 Scan072 | |
| Design and materials for an 'SS' engine mounting system. | 1st Feb 1929 | Box 14 \ 5 Scan073 | |
| Telegram confirmation regarding tests for engine mounting, reduced control height, and a duralumin Klaxon switch. | 1st Feb 1929 | Box 14 \ 5 Scan074 | |
| The performance and bodywork of a specimen 4-seater car after 10,000+ miles of driving. | 2nd Feb 1929 | Box 14 \ 5 Scan075 | |
| Design preferences for car components like screens, wheel carriers, and bonnets. | 1st Feb 1929 | Box 14 \ 5 Scan076 | |
| Internal report on the investigation into radiator movement and its relation to axle and frame periods. | 1st Feb 1929 | Box 14 \ 5 Scan077 | |
| Series of tests to investigate and reduce radiator movement in a vehicle chassis. | 1st Feb 1929 | Box 14 \ 5 Scan078 | |
| Modifications and tests conducted to resolve issues with radiator shimmy, torque reaction, and booming. | 1st Feb 1929 | Box 14 \ 5 Scan079 | |
| Tabulated report on tests investigating radiator movement under various engine and body mounting configurations. | 1st Feb 1929 | Box 14 \ 5 Scan080 | |
| Graph of frame deflection versus torque for different chassis models and spring configurations. | 8th Feb 1929 | Box 14 \ 5 Scan081 | |
| The back of a photograph or document mount with a date stamp. | 8th Feb 1929 | Box 14 \ 5 Scan082 | |
| Letter from Rolls-Royce of America seeking advice from Derby on rubber engine mountings and cast dashboards. | 15th Feb 1929 | Box 14 \ 5 Scan083 | |
| Letter regarding the fitting of cloth and felt silencing sheets to dashboards. | 19th Feb 1929 | Box 14 \ 5 Scan084 | |
| Experiments with 'SS' engine feet fitted to a 20-EX car and the resulting road test observations. | 19th Feb 1929 | Box 14 \ 5 Scan085 | |
| With a diagram proposing a simplification of the chassis engine mounting using a flexible strap. | 2nd Feb 1929 | Box 14 \ 5 Scan086 | |
| Telegram regarding engine tests using different types of rubber. | 25th Feb 1929 | Box 14 \ 5 Scan087 | |
| Unresolved issues with engine feet, steering, and exhaust booming following a 10,000-mile test. | 4th Mar 1929 | Box 14 \ 5 Scan088 | |
| Chassis periodicity issues and suggesting improvements for the 'SS' engine mounting. | 4th Mar 1929 | Box 14 \ 5 Scan089 | |
| Using friction damping and flexible mounting to reduce vibration, with an accompanying diagram. | 1st Mar 1929 | Box 14 \ 5 Scan090 | |
| Two 'SS' chassis cars ready for France and travel plans to Le Canadel to discuss their new features. | 1st Mar 1929 | Box 14 \ 5 Scan091 | |
| Experiments with 'SS' engine mountings to reduce radiator movement. | 1st Mar 1929 | Box 14 \ 5 Scan092 | |
| Test results on radiator movement and engine mounting arrangements for closed cars. | 1st Mar 1929 | Box 14 \ 5 Scan093 | |
| Tests concerning frame cross-members and wheel sizes to improve radiator steadiness and reduce oscillations. | 11th Mar 1929 | Box 14 \ 5 Scan094 | |
| Requesting the fitting of dampers to the flywheel casing and gearbox on car 21-EX. | 11th Mar 1929 | Box 14 \ 5 Scan095 | |
| Staged modification of the 'SS' engine mounting on car 20-EX. | 11th Mar 1929 | Box 14 \ 5 Scan096 | |
| Progress report on aero engines, SS engine mounting, and other development work. | 1st Mar 1929 | Box 14 \ 5 Scan097 | |
| The composition and value of various lubricating oils, including fatty, mineral, and compound types. | 12th Mar 1929 | Box 14 \ 5 Scan098 | |
| Testing conditions for SS engine mountings and observed vehicle instability. | 12th Mar 1929 | Box 14 \ 5 Scan099 | |
| The periodic nature of radiator wobble and the results of tests on different engine mounting systems. | 12th Mar 1929 | Box 14 \ 5 Scan100 | |
| Development avenues and testing schemes for engine mounting and frame damping to address oscillations. | 12th Mar 1929 | Box 14 \ 5 Scan101 | |
| Road tests concerning road wheel diameter, booming noise, engine roughness, and exhaust manifolds. | 12th Mar 1929 | Box 14 \ 5 Scan102 | |
| Manifold experiments and chassis testing to address noise and vibration issues. | 15th Mar 1929 | Box 14 \ 5 Scan103 | |
| Request to pass an order for the attached rubber jointing for the 'SS' Engine Mounting to Messrs. Crinup, Derby. | 15th Mar 1929 | Box 14 \ 5 Scan104 | |
| Copy of a telegram from Royce giving approval and instructions for car modifications. | 21th Mar 1929 | Box 14 \ 5 Scan105 | |
| Telegram received by telephone detailing car modifications and performance. | 21th Mar 1929 | Box 14 \ 5 Scan106 | |
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