| Description | Date | Identifier | |
| Typed report page discussing design points and the question of dates. | 1st Apr 1924 | Box 73 \ 2 scan0325 | |
| Progress on an urgent experimental aero job (M.DES.60), specifically concerning pedal pressure. | 4th Sep 1924 | Box 73 \ 2 scan0326 | |
| Design of brake operating gear, focusing on pin sizes, servo performance, and the co-efficient of friction. | 10th Apr 1924 | Box 73 \ 2 scan0327 | |
| Secret memo regarding modifications to the brake operating system leverage. | 4th Nov 1924 | Box 73 \ 2 scan0328 | |
| Suggested modifications to a braking system, including lever lengths and alternative schemes. | 1st Apr 1924 | Box 73 \ 2 scan0329 | |
| Secret memorandum about the requirement to design new parts to apply front wheel brakes to the short type chassis. | 11th Apr 1924 | Box 73 \ 2 scan0330 | |
| Design issues and theories related to four-wheel braking systems and servo performance. | 14th Apr 1924 | Box 73 \ 2 scan0331 | |
| Various brake servo system designs, comparing shoe types and servo layouts. | 16th Apr 1924 | Box 73 \ 2 scan0332 | |
| Modifications and testing of a four-wheel brake system and steering lock. | 16th Apr 1924 | Box 73 \ 2 scan0333 | |
| Progress report on the testing of four-wheel brakes and front axle assemblies, discussing patent issues, performance, and future testing requirements. | 1st Apr 1924 | Box 73 \ 2 scan0334 | |
| Secret internal memo discussing the progress and design of the EAC.3 four-wheel brake system. | 16th Apr 1924 | Box 73 \ 2 scan0335 | |
| Car tests in France, detailing axle modifications, steering bolt issues, and brake performance. | 16th Apr 1924 | Box 73 \ 2 scan0336 | |
| The M.DES.60 brake scheme, noting its excellent performance but a tendency to skid on wet and greasy roads. | 23th Apr 1924 | Box 73 \ 2 scan0337 | |
| Test report on an experimental four-wheel braking system, noting issues with brake balance and performance. | 23th Apr 1924 | Box 73 \ 2 scan0338 | |
| Design committee meeting minutes concerning four-wheel brakes and various component modifications. | 4th Apr 1924 | Box 73 \ 2 scan0339 | |
| Design committee meeting minutes discussing material ordering for various car components. | 1st Apr 1924 | Box 73 \ 2 scan0340 | |
| The performance of a car with an M.I.H.60 Servo and modifications to the operating levers. | 24th Apr 1934 | Box 73 \ 2 scan0341 | |
| 4-wheel brakes and servo systems under the RRM scheme. | 28th Apr 1924 | Box 73 \ 2 scan0342 | |
| Comparing the performance of the 'RRM' and 'Agreed' braking schemes, focusing on servo assistance and lag. | 28th Apr 1924 | Box 73 \ 2 scan0343 | |
| The operation of the brake pedal and servo assistance mechanism. | 28th Apr 1924 | Box 73 \ 2 scan0344 | |
| Comparing the performance of an 'agreed' servo brake scheme with the Hispano system. | 28th Apr 1924 | Box 73 \ 2 scan0345 | |
| The M. DES. 60 servo braking scheme, detailing its jerky operation and modifications to reduce friction. | 1st Apr 1924 | Box 73 \ 2 scan0346 | |
| Design committee meeting report on experiments with four-wheel servo-assisted brake systems, comparing various schemes. | 4th May 1924 | Box 73 \ 2 scan0347 | |
| Secret internal memo forwarding Mr. Royce's correspondence regarding servo and brake development. | 1st May 1924 | Box 73 \ 3 scan0001 | |
| Investigating brake jaggers and the effect of brake drum stiffness on various cars. | 1st May 1924 | Box 73 \ 3 scan0002 | |
| Tests conducted to understand and eliminate brake 'jaggers' by modifying brake shoes. | 1st May 1924 | Box 73 \ 3 scan0003 | |
| Braking tests concerning 'jaggers' and brake locking. | 1st May 1924 | Box 73 \ 3 scan0004 | |
| List of unsuccessful experiments carried out to eliminate front wheel brake jaggers on vehicle EAC.111. | 1st May 1924 | Box 73 \ 3 scan0005 | |
| List of experiments conducted on brakes and brake carriers, detailing various modifications and operational methods. | 1st May 1924 | Box 73 \ 3 scan0006 | |
| Methods to eliminate and causes not affecting brake 'jaggers'. | 20th Mar 1924 | Box 73 \ 3 scan0007 | |
| The RRM scheme of brakes, detailing its operation, servo action, and an investigation into brake lag. | 20th Mar 1924 | Box 73 \ 3 scan0008 | |
| Comparing brake lag and servo operation between the RRM and Hispano schemes. | 20th Mar 1924 | Box 73 \ 3 scan0009 | |
| The ordering of material for four-wheel brakes. | 1st May 1924 | Box 73 \ 3 scan0010 | |
| Secret memorandum regarding the testing of various cars, including a Hispano and EACs, fitted with different brake and design schemes. | 1st May 1924 | Box 73 \ 3 scan0011 | |
| Comparison table of different front wheel brake schemes. | 29th Apr 1924 | Box 73 \ 3 scan0012 | |
| Servo braking system issues and design improvements following a conference at Derby. | 1st May 1924 | Box 73 \ 3 scan0013 | |
| Comparing two direct braking schemes, for the rear axle only versus all four wheels. | 1st May 1924 | Box 73 \ 3 scan0014 | |
| Modifications to a car's braking system, including lever proportions and Mr. Royce's design preferences. | 2nd May 1924 | Box 73 \ 3 scan0015 | |
| Issues with four-wheel brakes on 40/50 HP cars, including scored drums and a steering tube failure. | 3rd May 1924 | Box 73 \ 3 scan0016 | |
| Secret memorandum discussing modifications to the brake system, specifically the linkage, balancing levers, and braking ratios. | 8th May 1924 | Box 73 \ 3 scan0017 | |
| Testing a car's brake servo with a modified reduction ratio, comparing the lag to a Hispano. | 1st May 1924 | Box 73 \ 3 scan0018 | |
| List of required modifications for parts on the front brake and front axle. | 9th May 1924 | Box 73 \ 3 scan0019 | |
| List of specifications for steering and brake components. | 9th May 1924 | Box 73 \ 3 scan0020 | |
| Comparing different brake schemes and outlining the advantages of a proposed 'adopted' scheme. | 9th May 1924 | Box 73 \ 3 scan0021 | |
| Test report comparing a car to a Hispano, detailing issues with brakes, clutch, carburetter and suggesting modifications. | 12th May 1924 | Box 73 \ 3 scan0022 | |
| New servo-operated four-wheel braking system and arranging a test drive in London. | 12th May 1924 | Box 73 \ 3 scan0023 | |
| Testing, production plan, and financial risks for a new chassis brake 'Adopted Scheme'. | 13th May 1924 | Box 73 \ 3 scan0024 | |
| Testing and modification schedule for the E.A.C. engine before a sales decision is made. | 13th May 1924 | Box 73 \ 3 scan0025 | |
| Secret memorandum from DA to HS regarding the fitting of a servo braking system and a potential gearbox upgrade for a chassis. | 13th May 1924 | Box 73 \ 3 scan0026 | |
| Secret memo regarding the postponement of a vehicle test to fit a new brake scheme and arrange a trial for an experimental car. | 15th May 1924 | Box 73 \ 3 scan0027 | |
| The effect of unequal four-wheel braking on the steering of the 40/50 HP car. | 15th May 1924 | Box 73 \ 3 scan0028 | |
| Comparing steering behavior during braking with and without a torque arm. | 12th Jul 1923 | Box 73 \ 3 scan0029 | |
| The tendency of the steering wheel to turn during braking and the effects of spring strength. | 15th May 1924 | Box 73 \ 3 scan0030 | |
| Initial load settings on a steering component to mitigate steering wobbles and road shocks. | 15th May 1924 | Box 73 \ 3 scan0031 | |
| The steering effects caused by axle twist under four-wheel braking. | 15th May 1924 | Box 73 \ 3 scan0032 | |
| Page 2 detailing steering behavior and pivot lean during single-brake application. | 15th May 1924 | Box 73 \ 3 scan0033 | |
| Centre-point steering, castoring action, and the effect of the torque arm. | 12th Jul 1928 | Box 73 \ 3 scan0034 | |
| Secret memo discussing fitting a more rigid control to the front axle and testing irreversible steering. | 17th May 1924 | Box 73 \ 3 scan0035 | |
| Secret internal memo comparing figures for front axle twist on cars with different spring types. | 17th May 1924 | Box 73 \ 3 scan0036 | |
| The measurement of front axle twist due to braking. | 17th May 1924 | Box 73 \ 3 scan0037 | |
| Wire confirmation from Royce to Hives regarding excessive front brake deflection affecting steering. | 19th May 1924 | Box 73 \ 3 scan0038 | |
| Brake linkage scheme, discussing servo torque multiplication and distribution ratios. | 9th May 1924 | Box 73 \ 3 scan0039 | |
| Reverting from four bolts to eight on the outer diameter of the servo's friction plate carrier for design consistency. | 19th May 1924 | Box 73 \ 3 scan0040 | |
| Secret memorandum regarding the 10,000-mile trials of 4-wheel brake systems, including plans to send test cars to France. | 19th Feb 1924 | Box 73 \ 3 scan0041 | |
| The performance of 4-wheel brakes, detailing safety concerns, passenger comfort, and adjustment procedures for a new trials car. | 20th May 1924 | Box 73 \ 3 scan0042 | |
| Measurement of spring deflection and pivot inclination during front wheel braking experiments. | 20th May 1924 | Box 73 \ 3 scan0043 | |
| The policy and effects of four-wheel brake systems. | 2nd May 1924 | Box 73 \ 3 scan0044 | |
| The dangers of locked wheels during braking and the challenges of achieving equal braking. | 1st May 1924 | Box 73 \ 3 scan0045 | |
| Continued memorandum discussing variation in braking performance between different cars. | 21th May 1924 | Box 73 \ 3 scan0046 | |
| Secret memo discussing experiments on brake linkage ratios and modifications proposed by Mr. Royce. | 22th May 1924 | Box 73 \ 3 scan0047 | |
| Adopted scheme for brakes, detailing tests on servo operation with different cam angles and reduction ratios. | 24th May 1924 | Box 73 \ 3 scan0048 | |
| Front braking, highlighting issues with servo adjustment and thrust washers. | 24th May 1924 | Box 73 \ 3 scan0049 | |
| Issues with front axle control and potential modifications to the springing system. | 26th May 1924 | Box 73 \ 3 scan0050 | |
| Defects and adjustments for the E.A.C. steering servo mechanism. | 26th May 1924 | Box 73 \ 3 scan0051 | |
| Brake system characteristics, handling, and potential material trials. | 27th May 1924 | Box 73 \ 3 scan0052 | |
| Secret status report on the development and production of four-wheel brakes. | 27th May 1924 | Box 73 \ 3 scan0053 | |
| Report page detailing findings on front braking, axle performance, wheel design, and servo speed. | 30th May 1924 | Box 73 \ 3 scan0054 | |
| Brake servo gear vibrations and noise issues. | 30th May 1924 | Box 73 \ 3 scan0055 | |
| Tests conducted to prevent brake jaggers. | 1st Jun 1924 | Box 73 \ 3 scan0056 | |
| Front axle braking torque damping. | 1st Jun 1924 | Box 73 \ 3 scan0057 | |
| Axle twist and 'jaggering' under various conditions of friction and braking. | 20th Mar 1924 | Box 73 \ 3 scan0058 | |
| Diagram illustrating the design and function of an axle torque damper. | 4th Jun 1984 | Box 73 \ 3 scan0059 | |
| Specifying the new outer brake drum (G.72554) with increased Brinell hardness for cars with four-wheel brakes. | 3rd Jun 1924 | Box 73 \ 3 scan0060 | |
| Letter from F.H. Royce to A.W. Claremont discussing patent schemes for four-wheel brake servo systems. | 3rd Jun 1924 | Box 73 \ 3 scan0061 | |
| List of modifications carried out on the adopted scheme of brakes for cars intended to run 10,000 miles. | 1st Jun 1924 | Box 73 \ 3 scan0062 | |
| Continued correspondence regarding instructions for stiffer shafts to reduce servo gear noise. | 1st Jun 1924 | Box 73 \ 3 scan0063 | |
| Testing the efficiency of a servo with various cams. | 1st Jun 1924 | Box 73 \ 3 scan0064 | |
| Measuring servo torque multiplication on a car. | 20th May 1924 | Box 73 \ 3 scan0065 | |
| Servo torque multiplication with Ferodo linings. | 20th Mar 1924 | Box 73 \ 3 scan0066 | |
| Adopted scheme of brakes, detailing modifications to leverage, servo operation and braking proportions. | 20th Mar 1924 | Box 73 \ 3 scan0067 | |
| Issues with servo brake noise, vibration, and heavy steering. | 1st Jun 1924 | Box 73 \ 3 scan0068 | |
| Comparison table of braking specifications for various schemes. | 5th Jun 1924 | Box 73 \ 3 scan0069 | |
| Schematic and calculation table for a servo braking system with a 55° cam. | 5th Jun 1924 | Box 73 \ 3 scan0070 | |
| Testing of an adopted braking scheme on a car before its departure to France. | 1st Jun 1924 | Box 73 \ 3 scan0071 | |
| Need for owner warnings and maintenance instructions for four-wheel brakes. | 1st Jun 1924 | Box 73 \ 3 scan0072 | |
| Secret memorandum detailing feedback on a car's braking and steering performance. | 6th May 1924 | Box 73 \ 3 scan0073 | |
| The performance of a car's clutch, servo, and braking system. | 6th Jun 1924 | Box 73 \ 3 scan0074 | |
| Secret memo arranging the handover of an EAC car and discussing its braking system. | 6th Jun 1924 | Box 73 \ 3 scan0075 | |
| The required addition of a plain thrust washer in the O.S. steering pivot following tests of the four-wheel brake system. | 11th Jun 1924 | Box 73 \ 3 scan0076 | |
| Torsional damper for front axle control in four-wheel brake systems. | 16th Jun 1924 | Box 73 \ 3 scan0077 | |
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