| Description | Date | Identifier | |
| Potential improvements and faults related to the dynamo, brakes, and servo system. | 29th Jan 1924 | Box 73 \ 2 scan0225 | |
| Secret memo discussing an experiment on four-wheel brakes by removing the non-wrapping shoe. | 29th Jan 1924 | Box 73 \ 2 scan0226 | |
| Confirmation of a telegram suggesting a test on rear brakes by removing the non-wrapping shoe. | 29th Jan 1924 | Box 73 \ 2 scan0227 | |
| Alterations to the gearbox and engine for a 4-wheel brake system. | 29th Jan 1924 | Box 73 \ 2 scan0228 | |
| Secret memo discussing experiments to improve a high-speed servo for four-wheel brakes. | 29th Jan 1924 | Box 73 \ 2 scan0229 | |
| Secret internal memorandum discussing the causes and potential solutions for brake jaggers. | 30th Jan 1924 | Box 73 \ 2 scan0230 | |
| Continuation of a document discussing requirements for a damping device. | 6th Feb 1924 | Box 73 \ 2 scan0231 | |
| Notes from a visit to Derby discussing R.A.C.S Brakes, gearbox modifications, and a separate unit servo. | 6th Feb 1924 | Box 73 \ 2 scan0232 | |
| Proposal to modify a servo unit for testing with a new gearbox and a note on E.A.C. design discussions. | 1st Feb 1934 | Box 73 \ 2 scan0233 | |
| Potential improvements to the brake system, focusing on slow speed servos, brake shoes, and backward efficiency. | 7th Feb 1924 | Box 73 \ 2 scan0234 | |
| Technical note comparing the Hispano arrangement to another design regarding wear on a lapping shoe. | 8th Feb 1924 | Box 73 \ 2 scan0235 | |
| From Hs. to AJL. requesting a series of brake tests be carried out. | 8th Feb 1924 | Box 73 \ 2 scan0236 | |
| Secret memorandum detailing the plan and costs for a new front wheel brake scheme and experimental chassis production. | 1st Feb 1924 | Box 73 \ 2 scan0237 | |
| Outlining the production and testing schedule for the 40/50HP chassis and future material ordering. | 1st Feb 1924 | Box 73 \ 2 scan0238 | |
| Comparing the weights and dimensions of Hispano and EAC.111 front brakes. | 1st Feb 1924 | Box 73 \ 2 scan0239 | |
| Continuation memo proposing a test on Hispano brakes to see the effect of heat on the drum. | 1st Feb 1924 | Box 73 \ 2 scan0240 | |
| Drawing of a front brake drum made from aluminium with a steel liner, showing dimensions and weight. | 1st Feb 1924 | Box 73 \ 2 scan0241 | |
| Cross-sectional drawing of a Hispano brake carrier. | 1st Feb 1924 | Box 73 \ 2 scan0242 | |
| Drawing of a Hispano Brake Carrier with material and weight specifications. | 1st Feb 1924 | Box 73 \ 2 scan0243 | |
| Drawing of a 'Hispano' front shoe with dimensions and a cross-section view. | 9th Feb 1924 | Box 73 \ 2 scan0244 | |
| With remarks on a telegram regarding design revisions, testing, and production suitability of a drive system. | 9th Feb 1924 | Box 73 \ 2 scan0245 | |
| Secret internal memo responding to points raised about a telegram from Mr. Royce concerning gearbox and servo design. | 12th Feb 1924 | Box 73 \ 2 scan0246 | |
| Modifications and schemes related to the braking system and associated components. | 11th Feb 1924 | Box 73 \ 2 scan0247 | |
| Chassis modifications for a trip to the South of France and competing with a Hispano racing car. | 1st Feb 1924 | Box 73 \ 2 scan0248 | |
| Brake performance issues, specifically 'jaggers' and backward efficiency. | 13th Feb 1924 | Box 73 \ 2 scan0249 | |
| Secret memo discussing steering modifications to address friction and wobble caused by the introduction of front-wheel brakes. | 14th Feb 1924 | Box 73 \ 2 scan0250 | |
| Abandonment of a high-speed servo brake system and the resulting design challenges and considerations. | 14th Feb 1924 | Box 73 \ 2 scan0251 | |
| Secret memo discussing proportionate braking, servo wear, and the design of the equaliser system. | 15th Feb 1924 | Box 73 \ 2 scan0252 | |
| Secret memorandum on four-wheel brakes, discussing weight reduction by using aluminium or duralumin. | 15th Feb 1924 | Box 73 \ 2 scan0253 | |
| Brake investigations, comparing wear on jointed and standard brake shoes. | 1st Feb 1924 | Box 73 \ 2 scan0254 | |
| The performance and wear characteristics of jointed brake shoes. | 2nd Feb 1924 | Box 73 \ 2 scan0255 | |
| The wear and efficiency of wrapping and non-wrapping brake shoes. | 12th Jul 1923 | Box 73 \ 2 scan0256 | |
| Schemes and ideas for a bi-directional servo braking system. | 5th Feb 1924 | Box 73 \ 2 scan0257 | |
| New internal and external gear scheme, comparing it to other designs and seeking opinions. | 12th Jul 1923 | Box 73 \ 2 scan0258 | |
| The co-efficient of static friction for Ferodo brake shoes. | 12th Jul 1923 | Box 73 \ 2 scan0259 | |
| Secret memo discussing design schemes for the EAC.3 servo, brakes, and hand-starting shaft. | 21th Feb 1924 | Box 73 \ 2 scan0260 | |
| Copy of a telegram from Mr. Royce discussing patents, servos, brakes, and steering design. | 21th Feb 1924 | Box 73 \ 2 scan0261 | |
| Testing alternative friction materials for the brake servo and investigating unequal pressure distribution. | 22th Feb 1924 | Box 73 \ 2 scan0262 | |
| Copy of a telegram from Mr. Royce regarding brake system design and testing. | 23th Feb 1924 | Box 73 \ 2 scan0263 | |
| Secret internal memo discussing three major design issues: patents, steering shocks, and a heated dynamo. | 23th Feb 1924 | Box 73 \ 2 scan0264 | |
| Improvements for the front brakes of the 40/50 HP car. | 23th Feb 1924 | Box 73 \ 2 scan0265 | |
| Page 2 of an experimental report with recommendations for brake, pivot and axle components. | 23th Feb 1924 | Box 73 \ 2 scan0266 | |
| Secret internal memorandum discussing brake shoe design to improve backward braking. | 27th Feb 1924 | Box 73 \ 2 scan0267 | |
| Inquiring about results for existing designs and semi-flexible steel shoes. | 2nd Feb 1924 | Box 73 \ 2 scan0268 | |
| Steering tests, detailing modifications and the effects of a front wheel brake axle on a 40/50 HP car. | 2nd Feb 1924 | Box 73 \ 2 scan0269 | |
| Modifications to a front wheel brake car's springs, radius rods, and steering. | 29th Feb 1924 | Box 73 \ 2 scan0270 | |
| Steering issues on 40/50 HP models after the fitment of 4-wheel brakes. | 29th Feb 1924 | Box 73 \ 2 scan0271 | |
| Modifications and the implementation of a 4-wheel brake system. | 1st Mar 1924 | Box 73 \ 2 scan0272 | |
| Recommendation of a modified semi-servo brake system and comparing it to other systems. | 1st Mar 1924 | Box 73 \ 2 scan0273 | |
| Continued memo discussing issues with servos, braking systems, and competitor patents from Renault and Hispano. | 3rd Mar 1924 | Box 73 \ 2 scan0274 | |
| Secret memo detailing a modified semi-servo brake operating system, referred to as the 'R.R.M.' scheme. | 3rd Mar 1924 | Box 73 \ 2 scan0275 | |
| Note discussing brake wear, servo heat, and the use of an equaliser for back brakes. | 4th Mar 1924 | Box 73 \ 2 scan0276 | |
| Comparing different brake systems and advocating for a proprietary design. | 4th Mar 1924 | Box 73 \ 2 scan0277 | |
| Potential improvements to brake protection systems. | 6th Mar 1924 | Box 73 \ 2 scan0278 | |
| Development and testing of two brake servo schemes. | 10th Mar 1924 | Box 73 \ 2 scan0279 | |
| Brakes Scheme DES. 60 for a 40/50 car, focusing on servo performance. | 10th Mar 1924 | Box 73 \ 2 scan0280 | |
| Report page discussing dissatisfaction with the mechanical details of a vehicle under test. | 1st Mar 1924 | Box 73 \ 2 scan0281 | |
| Design and testing of a four-wheel brake servo system, designated DES.60. | 1st Mar 1924 | Box 73 \ 2 scan0282 | |
| Page 2 of a memorandum discussing stress ratios, mentioning a Mr. Stent and project EAC.1. | 11th Mar 1924 | Box 73 \ 2 scan0283 | |
| The urgent order and machining of 100 sets of front wheel brake material. | 11th Mar 1924 | Box 73 \ 2 scan0284 | |
| Outlining a revised production programme for various chassis series and the introduction of front wheel brakes. | 10th Mar 1924 | Box 73 \ 2 scan0285 | |
| Chassis production and testing schedule, addressing potential bottlenecks, and requesting an increase in authorised sets. | 1st Mar 1924 | Box 73 \ 2 scan0286 | |
| Production schedules for E.A.C.II and E.A.C.III chassis and ordering materials for a front wheel brake scheme. | 10th Mar 1924 | Box 73 \ 2 scan0287 | |
| Telephone message from CJ concerning the urgency for Mr. Royce to see the chassis fitted with brake scheme Des. 60. | 12th Mar 1924 | Box 73 \ 2 scan0288 | |
| Car tests concerning the braking servo, engine component arrangement, and exhaust system power loss. | 13th Mar 1924 | Box 73 \ 2 scan0289 | |
| To Mr. Ellison confirming the retention of removed brake parts and levers. | 14th Mar 1924 | Box 73 \ 2 scan0290 | |
| Design and performance of a brake servo system, comparing it with a Hispano system. | 14th Mar 1924 | Box 73 \ 2 scan0291 | |
| Brake and gear design schemes following a meeting at Le Canadel. | 22th Mar 1924 | Box 73 \ 2 scan0292 | |
| General review of the four-wheel brakes situation, including axles, operation and servo speed. | 24th Mar 1924 | Box 73 \ 2 scan0293 | |
| Brake servo performance, addressing issues like 'jaggers' and proposing alternative mechanical schemes. | 24th Mar 1924 | Box 73 \ 2 scan0294 | |
| Continued memo discussing testing designs on the drawing board and a potential fault of lag. | 25th Mar 1924 | Box 73 \ 2 scan0295 | |
| Internal memorandum requesting braking performance data for two-wheel versus four-wheel systems for a police court case. | 25th Mar 1924 | Box 73 \ 2 scan0296 | |
| The combination of the RRM and DES.60 brake operation schemes into a single design for testing purposes. | 25th Mar 1924 | Box 73 \ 2 scan0297 | |
| Mechanical gain and friction theories for a new slow-speed servo braking scheme. | 25th Mar 1924 | Box 73 \ 2 scan0298 | |
| Continued page describing a test method for tying two plates together using pins. | 26th Mar 1924 | Box 73 \ 2 scan0299 | |
| Vehicle braking, comparing the performance of 4-wheel brakes with rear-wheel only brakes. | 26th Mar 1924 | Box 73 \ 2 scan0300 | |
| Summary of the development and testing of a four-wheel brake system, debating desired brake effect and servo multiplication. | 26th Mar 1924 | Box 73 \ 2 scan0301 | |
| Improvements to a servo system, referencing patents, road testing, and contributions from various individuals. | 27th Mar 1924 | Box 73 \ 2 scan0302 | |
| Reasons for adopting specific lever lengths in an agreed brake system, including calculations. | 27th Mar 1924 | Box 73 \ 2 scan0303 | |
| Page 2 of a memo detailing calculations for a braking servo system, including friction coefficients, loads, and torque. | 27th Mar 1924 | Box 73 \ 2 scan0304 | |
| Calculations for servo torque, load on jaws, and friction coefficients. | 27th Mar 1924 | Box 73 \ 2 scan0305 | |
| Secret memorandum detailing design changes and instructions for the RRM Brake System. | 27th Mar 1924 | Box 73 \ 2 scan0306 | |
| Secret report on brake systems and proposed alterations to exhaust pipes, silencers, and manifolds for specific EAC projects. | 27th Mar 1924 | Box 73 \ 2 scan0307 | |
| The dangers of fitting front brakes to cars with steel artillery wheels due to excessive wheel overhang. | 1st Apr 1924 | Box 73 \ 2 scan0308 | |
| Secret report discussing brake gear schemes, referencing a blueprint and proposing alternative constructions and lubrication methods. | 4th Apr 1924 | Box 73 \ 2 scan0309 | |
| Bump test for the 40/50 chassis front brakes and springs. | 4th Apr 1924 | Box 73 \ 2 scan0310 | |
| Bump test for a new front spring rear anchorage, detailing component breakages over time. | 4th Apr 1924 | Box 73 \ 2 scan0311 | |
| Log of component breakages during testing, detailing running times and failure descriptions. | 4th Apr 1924 | Box 73 \ 2 scan0312 | |
| Log sheet detailing component breakages and failures with corresponding running times and part numbers. | 4th Apr 1924 | Box 73 \ 2 scan0313 | |
| Log of component breakages with corresponding running times and piece numbers. | 4th Apr 1924 | Box 73 \ 2 scan0314 | |
| Log of important component failures with corresponding running times, excluding frame and springs. | 4th Apr 1924 | Box 73 \ 2 scan0315 | |
| Bump test comparison of new Firth road springs against standard pattern springs, analysing failures, life, and fracture positions. | 1st Apr 1942 | Box 73 \ 2 scan0316 | |
| Summary of frame failures from a bump test, detailing cracks with corresponding running times and sketches. | 1st Apr 1942 | Box 73 \ 2 scan0317 | |
| Testing of alternative oils and the policy on recommending them versus selling them for profit. | 3rd Apr 1924 | Box 73 \ 2 scan0318 | |
| Component failures and modifications following a bump test on front brakes and steering. | 5th Apr 1924 | Box 73 \ 2 scan0319 | |
| Broken worm tube sent for examination. | 7th Apr 1924 | Box 73 \ 2 scan0320 | |
| Broken worm tube from a 40/50 front brake bump test and difficulties with the steering lock. | 7th Apr 1924 | Box 73 \ 2 scan0321 | |
| Development and issues with a four-wheel brake system. | 1st Apr 1924 | Box 73 \ 2 scan0322 | |
| Minutes from a design committee meeting discussing issues with a flat plate servo and proposed adjustments. | 9th Apr 1924 | Box 73 \ 2 scan0323 | |
| Servo adjustment, steering lock experiments, brake joint protection, road shock transmission, and brake jaggers. | 4th Apr 1924 | Box 73 \ 2 scan0324 | |
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