| Description | Date | Identifier | |
| Design suggestion for the front dumb iron and shackle stop in the event of spring breakage. | 14th Dec 1923 | Box 73 \ 2 scan0125 | |
| Design of the front spring rear anchorage for the 40/50 model, including details on a protective cover and spring dimensions. | 4th Dec 1923 | Box 73 \ 2 scan0126 | |
| Modifications for the 40/50 model's four-wheel brake system, including changes to springs and steering. | 1st Dec 1923 | Box 73 \ 2 scan0127 | |
| Brake effectiveness, specifically regarding floating fulcrum and front wheel brakes. | 12th Jul 1923 | Box 73 \ 2 scan0128 | |
| The testing of an epicyclic equalizer, including notes on pedal pressure. | 12th Jul 1923 | Box 73 \ 2 scan0129 | |
| Experiment with split shoes and a floating fulcrum for the 40/50 front wheel brake system. | 12th Dec 1923 | Box 73 \ 2 scan0130 | |
| Method for operating 4-wheel brakes, as suggested by Mr. Lovesey. | 1st Dec 1923 | Box 73 \ 2 scan0131 | |
| Suggested method for operating all four-wheel brakes with a servo motor. | 12th Dec 1923 | Box 73 \ 2 scan0132 | |
| The performance of a 4-wheel braking system on a 40/50 HP car. | 12th Jul 1923 | Box 73 \ 2 scan0133 | |
| Reducing the Ferodo lining on the wrapping shoe for Jaggers. | 12th Dec 1923 | Box 73 \ 2 scan0134 | |
| Testing floating fulcrum front brakes with jointed shoes, noting increased efficiency but a spongy feel. | 8th Dec 1923 | Box 73 \ 2 scan0135 | |
| Secret internal memorandum detailing the design and modifications for brake systems. | 10th Dec 1923 | Box 73 \ 2 scan0136 | |
| Specifications for brakes, front axle, and springs. | 10th Dec 1923 | Box 73 \ 2 scan0137 | |
| Testing friction loss in front brakes. | 10th Dec 1923 | Box 73 \ 2 scan0138 | |
| Brake pedal pressure distribution and mechanical efficiency for a system without front brakes. | 10th Dec 1923 | Box 73 \ 2 scan0139 | |
| The mechanical efficiency of a car's braking system. | 12th Dec 1923 | Box 73 \ 2 scan0140 | |
| Returning to the original leverage for floating fulcrum brakes with jointed shoes. | 10th Dec 1923 | Box 73 \ 2 scan0141 | |
| Requesting experiments to find variations in braking due to surface conditions and compare wear rates. | 11th Dec 1923 | Box 73 \ 2 scan0142 | |
| Telegram discussing modifications to a car's servo, brakes, and springs. | 11th Dec 1923 | Box 73 \ 2 scan0143 | |
| Proposed modifications to the 40/50 front axle to increase steering lock with four-wheel brakes. | 12th Dec 1923 | Box 73 \ 2 scan0144 | |
| Inherent disadvantages of fitting a new 4-wheel brake design to existing 40/50 HP cars. | 12th Dec 1923 | Box 73 \ 2 scan0145 | |
| Brake operation, spring stiffness, and steering control for the 40/50 HP model. | 12th Dec 1923 | Box 73 \ 2 scan0146 | |
| Adopting Perrot type self-wrapping brake shoes due to limitations with a current scheme. | 12th Dec 1923 | Box 73 \ 2 scan0147 | |
| The inherent disadvantages of fitting 4-wheel brakes to existing 40/50 cars. | 12th Dec 1923 | Box 73 \ 2 scan0148 | |
| The Hispano brake system and the proposed brake and suspension arrangements for the 40/50 HP model. | 12th Dec 1923 | Box 73 \ 2 scan0149 | |
| Proposal to adopt Perrot type self-wrapping brake shoes. | 12th Dec 1923 | Box 73 \ 2 scan0150 | |
| Query regarding friction losses in a four-wheel brake system's 'servo' connecting lever. | 13th Dec 1923 | Box 73 \ 2 scan0151 | |
| Delays in developing and testing two new types of brakes for the 40/50 model. | 15th Dec 1923 | Box 73 \ 2 scan0152 | |
| The importance of properly testing new parts, contrasting the situation with brakes against engines. | 15th Dec 1923 | Box 73 \ 2 scan0153 | |
| Car PN testing, E.A.C. model engine and brake arrangements, and associated limitations. | 15th Dec 1923 | Box 73 \ 2 scan0154 | |
| Delays and revised timelines for brake development and testing. | 15th Dec 1923 | Box 73 \ 2 scan0155 | |
| Note on the importance of properly testing new parts for front wheel brakes before supplying them to customers. | 15th Dec 1923 | Box 73 \ 2 scan0156 | |
| Car testing, gearbox designs, and the unsatisfactory state of the E.A.C.3 brake system. | 15th Dec 1923 | Box 73 \ 2 scan0157 | |
| Suggesting experiments to resolve snatching and chunking in the 40/50 front wheel brake servo system. | 15th Dec 1923 | Box 73 \ 2 scan0158 | |
| Final arrangement and technical specifications of a four-wheel brake servo system. | 17th Dec 1923 | Box 73 \ 2 scan0159 | |
| Brake shoe arrangements and the implementation of four-wheel brakes. | 20th Dec 1923 | Box 73 \ 2 scan0160 | |
| Instruction to millwrights to build a rig for testing brakes. | 20th Dec 1923 | Box 73 \ 2 scan0161 | |
| Performance and limitations of 4-wheel brakes, comparing them to customer expectations and competitor standards. | 20th Dec 1923 | Box 73 \ 2 scan0162 | |
| Testing of Hispano 4-wheel brakes and the development status of the EAC-1 engine. | 20th Dec 1923 | Box 73 \ 2 scan0163 | |
| Four separate experiments to improve the 40/50 four-wheel brake system. | 20th Dec 1923 | Box 73 \ 2 scan0164 | |
| Testing of new brakes against a Hispano-Suiza car and planning a road test in France. | 28th Dec 1923 | Box 73 \ 2 scan0165 | |
| Secret memo discussing the design and development of a new brake system, including the front axle, servo, and shoes. | 1st Jan 1924 | Box 73 \ 2 scan0166 | |
| Secret memorandum discussing the design and performance of a brake system, including the servo, springs, and shoes. | 1st Jan 1924 | Box 73 \ 2 scan0167 | |
| Bumping tests on a 40/50 chassis with EAC-111. | 12th Jul 1923 | Box 73 \ 2 scan0168 | |
| Log sheet detailing the results of a bump test on a new front axle and brake system. | 2nd Jan 1924 | Box 73 \ 2 scan0169 | |
| Log of breakages related to springs and steering components for a Standard 40/50 model. | 2nd Jan 1924 | Box 73 \ 2 scan0170 | |
| Log sheet detailing breakages and running times for Woodhead Springs and Houdaille Shock Absorbers. | 2nd Jan 1924 | Box 73 \ 2 scan0171 | |
| Analysis of spring failures during testing, detailing average life and fracture positions. | 12th Jul 1923 | Box 73 \ 2 scan0172 | |
| Scheme for taking up clearance in rear brakes by rotating the servo with foot pressure. | 12th Jul 1923 | Box 73 \ 2 scan0173 | |
| Alternative scheme for a servo-assisted braking system. | 12th Jul 1923 | Box 73 \ 2 scan0174 | |
| Secret memo discussing failures and potential improvements for steering gear, front springs, and frame brackets. | 1st Jan 1924 | Box 73 \ 2 scan0175 | |
| Listing cars in the Experimental Department as of October 31st 1923, including test vehicles for 4-wheel brakes. | 1st Jan 1924 | Box 73 \ 2 scan0176 | |
| Modifications to reduce heat under the scuttle and potential alterations to the undershield for cars with front brakes. | 7th Jan 1924 | Box 73 \ 2 scan0177 | |
| Technical drawing and calculation sheet detailing EAC-1 steering geometry. | 8th Jan 1924 | Box 73 \ 2 scan0178 | |
| Meeting notes discussing steering lock and front spring modifications for the EAC.3 chassis. | 8th Jan 1924 | Box 73 \ 2 scan0179 | |
| Meeting minutes discussing 4-wheel brakes, 20 HP frame length, a side lever gearbox, and patent questions. | 1st Jan 1924 | Box 73 \ 2 scan0180 | |
| Modifying car brakes to achieve more equal pressure between the front and rear. | 11th Jan 1924 | Box 73 \ 2 scan0181 | |
| Brake judder, known as 'jaggers', and reducing servo power. | 11th Jan 1924 | Box 73 \ 2 scan0182 | |
| Modifications to prevent brake pedal jagging and its effect on steering. | 1st Jan 1924 | Box 73 \ 2 scan0183 | |
| Front brake effectiveness, associated steering faults, and comparative brake tests on a rig versus on the road. | 11th Jan 1924 | Box 73 \ 2 scan0184 | |
| Issues with steering pivot pins, brake dust covers, and future testing plans. | 12th Jul 1923 | Box 73 \ 2 scan0185 | |
| Schematic diagram showing the arrangement of a Hispano four-wheel brake system. | 1st Jan 1924 | Box 73 \ 2 scan0186 | |
| Diagram of a 40-50 four-wheel brake system's standard and modified arrangements. | 1st Jan 1924 | Box 73 \ 2 scan0187 | |
| Calculations and diagrams for rear brake pressure on STD 40-50 and Goshawk models. | 11th Jan 1924 | Box 73 \ 2 scan0188 | |
| Requesting a meeting to discuss important jobs, including Front Wheel Brakes, and questions raised by CJ. | 11th Jan 1924 | Box 73 \ 2 scan0189 | |
| Steering issues caused by imbalanced four-wheel braking and potential remedies. | 14th Jan 1924 | Box 73 \ 2 scan0190 | |
| Potential improvements to the four-wheel brake system compensation on the 40/50 model. | 14th Jan 1924 | Box 73 \ 2 scan0191 | |
| Secret internal memo regarding car trial arrangements and a brake comparison with a Hispano car. | 15th Jan 1924 | Box 73 \ 2 scan0192 | |
| Letter from R. to E. requesting weekly progress reports on various projects. | 16th Jan 1924 | Box 73 \ 2 scan0193 | |
| Secret memorandum detailing progress and nomenclature for various EAC development schemes. | 16th Jan 1924 | Box 73 \ 2 scan0194 | |
| Status report on various experimental car (EAC) models, including gearbox and chassis updates. | 17th Jan 1924 | Box 73 \ 2 scan0195 | |
| Intensive road test of 4-wheel brakes on a 40/50 car. | 17th Jan 1924 | Box 73 \ 2 scan0196 | |
| Issues with front brakes, including oil contamination causing steering pull and a proposed fix for a chunky operating mechanism. | 7th Jan 1924 | Box 73 \ 2 scan0197 | |
| Brake servo issue causing noise and a proposed solution. | 17th Jan 1924 | Box 73 \ 2 scan0198 | |
| Brake system pressure distribution and servo operation. | 17th Jan 1924 | Box 73 \ 2 scan0199 | |
| The effects of front braking on steering for a 40/50 chassis. | 17th Jan 1924 | Box 73 \ 2 scan0200 | |
| Unequal braking affecting steering. | 22th Jan 1924 | Box 73 \ 2 scan0201 | |
| Brake servo adjustments, pedal pressure calculations, and the effects of unequal braking on steering. | 19th Jan 1924 | Box 73 \ 2 scan0202 | |
| Requesting instructions for the pull off springs on front brakes. | 21th Jan 1924 | Box 73 \ 2 scan0203 | |
| Confidential internal memorandum discussing the phenomenon of 'jaggers' in front wheel brakes and proposing solutions. | 21th Jan 1924 | Box 73 \ 2 scan0204 | |
| Technical memorandum discussing brake performance, shoe design, servo adjustments, and steering. | 21th Jan 1924 | Box 73 \ 2 scan0205 | |
| Effects of unequal braking on steering geometry and potential design solutions. | 23th Jan 1924 | Box 73 \ 2 scan0206 | |
| Effects of unequal brakes on steering and potential solutions for consistent braking. | 23th Jan 1924 | Box 73 \ 2 scan0207 | |
| Brake performance, consistency issues, and potential improvements to the system. | 23th Jan 1924 | Box 73 \ 2 scan0208 | |
| Advocating for fitting Goshawks with 4-wheel brakes over other upgrades. | 23th Jan 1924 | Box 73 \ 2 scan0209 | |
| Specifications and alternatives for pull off springs for front brakes. | 23th Jan 1924 | Box 73 \ 2 scan0210 | |
| Brakes road test, detailing issues with servo liner wear and material comparisons. | 25th Jan 1924 | Box 73 \ 2 scan0211 | |
| Brake performance and wear, comparing two-wheel and four-wheel systems under various road conditions. | 25th Jan 1924 | Box 73 \ 2 scan0212 | |
| Using cast iron to achieve a consistent servo brake for equal braking. | 25th Jan 1924 | Box 73 \ 2 scan0213 | |
| Various braking system issues including servo wear, rear chunking, and potential solutions involving dash-pots and different materials. | 25th Jan 1924 | Box 73 \ 2 scan0214 | |
| Letter detailing views on slow-speed servo brakes and observations on competitor's brake mechanisms. | 27th Jan 1924 | Box 73 \ 2 scan0215 | |
| Letter discussing improvements to the braking servo system, including speed of application and equalizing braking force. | 27th Jan 1924 | Box 73 \ 2 scan0216 | |
| Letter from F.H. Royce discussing suspension stiffness, rubber buffers, and the heating of the 'servo' and countershaft brakes. | 28th Jan 1924 | Box 73 \ 2 scan0217 | |
| From 'R' discussing technical solutions for brake issues referred to as 'jaggers and chunking'. | 28th Jan 1924 | Box 73 \ 2 scan0218 | |
| Secret internal memo discussing the development and priority of chassis models EAC.1 to EAC.5. | 28th Jan 1924 | Box 73 \ 2 scan0219 | |
| Investigating the cause of 'brake jaggers' and potential cures. | 28th Jan 1924 | Box 73 \ 2 scan0220 | |
| The suggested cause for the chattering of front brakes. | 25th Jan 1924 | Box 73 \ 2 scan0221 | |
| The mechanics of friction, energy, and slip in a spring and drum system. | 25th Jan 1924 | Box 73 \ 2 scan0222 | |
| Telegram suggesting a test by removing non-wrapping shoes from the rear brake. | 29th Jan 1924 | Box 73 \ 2 scan0223 | |
| Secret memo discussing the decision to implement a slow speed servo for the 4-wheel brake system and outlining a conversion plan. | 29th Jan 1924 | Box 73 \ 2 scan0224 | |
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