| Description | Date | Identifier | |
| The failure of an E.A.C. Pendulum Lever during a bumping test, recommending a halt until the design is reconsidered. | 17th Nov 1923 | Box 72 \ 3 scan0284 | |
| Secret memo discussing potential modifications to the EAC.1 and 2 steering column to make steering easier. | 1st Jan 1924 | Box 72 \ 3 scan0285 | |
| Breakages in steering and front springs, proposing design changes and further testing. | 16th Jan 1924 | Box 72 \ 3 scan0286 | |
| Secret and confidential memo discussing the phenomenon of 'jaggers' (vibrations) in front wheel brakes and potential solutions. | 21th Jan 1924 | Box 72 \ 3 scan0287 | |
| Brake and steering system testing and proposed improvements. | 21th Jan 1924 | Box 72 \ 3 scan0288 | |
| Effects of unequal braking on centre point steering and potential solutions. | 2nd Feb 1924 | Box 72 \ 3 scan0289 | |
| Scheme for applying roller and ball bearings to a steering box rocking shaft. | 2nd Feb 1924 | Box 72 \ 3 scan0290 | |
| Secret memo discussing the performance and potential improvements for a new steering box. | 11th Feb 1924 | Box 72 \ 3 scan0291 | |
| Secret memorandum discussing steering design changes to address friction and wobbles caused by front wheel brakes. | 14th Feb 1924 | Box 72 \ 3 scan0292 | |
| Secret internal memo discussing steering shocks and spring adjustments on an experimental car. | 19th Feb 1924 | Box 72 \ 3 scan0293 | |
| Secret memo evaluating a new steering box and pedal setup on an experimental car, comparing it to the standard model. | 21th Feb 1924 | Box 72 \ 3 scan0294 | |
| Secret memo discussing potential solutions and ideas for steering and road shock issues. | 26th Feb 1924 | Box 72 \ 3 scan0295 | |
| Potential causes and solutions for steering issues like shocks, wobbles, and heavy steering. | 27th Feb 1924 | Box 72 \ 3 scan0296 | |
| The steering effects of fitting steel artillery wheels in place of wire wheels. | 27th Feb 1924 | Box 72 \ 3 scan0297 | |
| Steering tests and modifications for the 40/50 HP car. | 28th Feb 1924 | Box 72 \ 3 scan0298 | |
| Modifications to a front-wheel brake car, including spring changes and steering tube fabrication. | 6th Mar 1924 | Box 72 \ 3 scan0299 | |
| Steering geometry, road shocks, and wheel types. | 6th Mar 1924 | Box 72 \ 3 scan0300 | |
| Note discussing the ideal weight for a steering wheel, balancing feel with structural limitations. | 7th Mar 1924 | Box 72 \ 3 scan0301 | |
| Steering troubles, specifically the effects of pivot lean, bad geometry, and oblique shocks. | 7th Mar 1924 | Box 72 \ 3 scan0302 | |
| Suggested reinforcement for the frame at the front spring anchorage to prevent buckling. | 18th Mar 1924 | Box 72 \ 3 scan0303 | |
| Secret memo from a meeting at Le Canadel regarding steering with front-wheel brakes, front axles, and wheels. | 22th Mar 1924 | Box 72 \ 3 scan0304 | |
| The resolution of steering problems and sending new parts to France for testing. | 27th Mar 1924 | Box 72 \ 3 scan0305 | |
| Modifications to steering and suspension to mitigate road shocks. | 10th Apr 1924 | Box 72 \ 3 scan0306 | |
| 40/50 steering characteristics, pivot adjustments and low speed wobbles. | 1st Apr 1924 | Box 72 \ 3 scan0307 | |
| Steering performance issues, particularly with the addition of front wheel brakes. | 11th Apr 1924 | Box 72 \ 3 scan0308 | |
| Steering stress caused by wheel obstructions and potential solutions. | 16th Apr 1924 | Box 72 \ 3 scan0309 | |
| Defects and adjustments for the E.A.C. steering servo mechanism. | 26th May 1924 | Box 72 \ 3 scan0310 | |
| Excessive wear found on the steering nut for a 40-50 HP vehicle, chassis 14-PK. | 16th Dec 1924 | Box 72 \ 3 scan0311 | |
| Design principles and characteristics of braking systems, including skid control and brake drum materials. | 19th Dec 1924 | Box 72 \ 3 scan0312 | |
| Steering nut wear, attributing issues to lack of lubrication and proposing a redesign. | 19th Dec 1924 | Box 72 \ 3 scan0313 | |
| Rapid wear of steering nuts on 14-PK and 40-50 HP models, refuting lack of lubrication as the cause for one specific case. | 24th Dec 1924 | Box 72 \ 3 scan0314 | |
| Worn solid steering nut from chassis 14-PK returned for examination. | 5th Jan 1925 | Box 72 \ 3 scan0315 | |
| Request for a copy of the examination report on a steering nut from chassis No. 14-PK. | 16th Jan 1925 | Box 72 \ 3 scan0316 | |
| Examination of excessive wear on a steering nut from chassis 14-PK due to lubrication failure. | 23th Jan 1925 | Box 72 \ 3 scan0317 | |
| 'Silver Ghost' steering wobble, advocating for the balancing of wheels and tyres, especially on cars with 4-wheel brakes. | 18th Sep 1925 | Box 72 \ 3 scan0318 | |
| High-speed steering wobble issues on 40/50 HP models. | 20th May 1925 | Box 72 \ 3 scan0319 | |
| Significant steering problems with the 44-PK model, including 'binding' and 'steering wobble'. | 3rd Mar 1925 | Box 72 \ 3 scan0320 | |
| Steering fault on the EAC 'V' Series cars and a potential solution with a new spring-damped lever. | 1st May 1925 | Box 72 \ 3 scan0321 | |
| Customer complaints and issues regarding the steering gear's performance on rough roads. | 11th Jun 1925 | Box 72 \ 3 scan0322 | |
| Continued memorandum page urging for a problem to be investigated further. | 28th Aug 1925 | Box 72 \ 3 scan0323 | |
| Copy of a telegram from Mr. Royce to CJ detailing improvements for steering issues on the New Phantom and Goshawk models. | 28th Aug 1925 | Box 72 \ 3 scan0324 | |
| Daily report log detailing steering issues on experimental car 93-NK, the first 'V' series chassis. | 24th Apr 1926 | Box 72 \ 3 scan0325 | |
| History and complexity of steering faults on the Phantom model, referencing issues like road shocks and high-speed wobbles. | 20th May 1926 | Box 72 \ 3 scan0326 | |
| Car complaints and a proposal for an inter-departmental agreement on the car's worst features. | 20th Feb 1924 | Box 72 \ 3 scan0327 | |
| Secret memo concerning the steering arrangement on PN's car, detailing modifications made due to failures during bump tests. | 20th Feb 1924 | Box 72 \ 3 scan0328 | |
| Secret memo requesting further information on Hispano steering specifications and pivot inclination. | 27th Feb 1924 | Box 72 \ 3 scan0329 | |
| Design and rating of springs for a steering tube. | 7th Mar 1924 | Box 72 \ 3 scan0330 | |
| Secret internal memorandum discussing the design and fitting of a longitudinal steering tube. | 5th Apr 1924 | Box 72 \ 3 scan0331 | |
| 40/50 steering, comparing different pivot setups and their effects on road shock and stability. | 1st Apr 1924 | Box 72 \ 3 scan0332 | |
| Steering wind-up, front-wheel brake testing, and pivot pin bush issues on the 40/50 model. | 12th Jul 1923 | Box 72 \ 3 scan0333 | |
| Modification to a Side Steering Tube Joint based on instructions from Mr. Royce. | 23th Apr 1924 | Box 72 \ 3 scan0334 | |
| Proposed modifications to the cross steering tube bumping wheelcase. | 12th May 1924 | Box 72 \ 3 scan0335 | |
| Modifications and design considerations for the side steering tube. | 15th May 1924 | Box 72 \ 3 scan0336 | |
| Rating specifications for spring F.1182 fitted to the 35-PK car steering tube. | 19th May 1924 | Box 72 \ 3 scan0337 | |
| Telegram requesting collection from Midland station to discuss issues with steering components. | 21th May 1923 | Box 72 \ 3 scan0338 | |
| Necessary modifications and further testing for a cross steering tube. | 22th May 1924 | Box 72 \ 3 scan0339 | |
| Secret memo from DA to Hs. detailing instructions from Mr. Royce to investigate issues with steering and braking. | 21th May 1924 | Box 72 \ 3 scan0340 | |
| Works order for the despatch of side steering tube springs for a 10,000-mile trial car. | 16th Jun 1924 | Box 72 \ 3 scan0341 | |
| The fouling of cross steering levers by wheels for balloon tyres on 40/50 HP models with 4-wheel brakes. | 1st Sep 1924 | Box 72 \ 3 scan0342 | |
| Telegram received by telephone requesting replacement parts including a side steering tube and springs. | 12th Jun 1924 | Box 72 \ 3 scan0343 | |
| Expressing dislike for the appearance and functionality of a new experimental petrol tank and filler. | 8th Aug 1924 | Box 72 \ 3 scan0344 | |
| Unsatisfactory clearance in the 40/50 'U' Series petrol tank filter causing foreign matter to enter the carburetter. | 15th Nov 1924 | Box 72 \ 3 scan0345 | |
| Reviewing a new steering box and pedal design on an experimental vehicle. | 21th Feb 1924 | Box 72 \ 3 scan0346 | |
| Design and control of the front axle, specifically regarding springs and torque management. | 10th Apr 1924 | Box 72 \ 3 scan0347 | |
| Design of a brake pedal for use with a servo system. | 7th May 1924 | Box 72 \ 3 scan0348 | |
| Design and comfort of a new split pedal gap plate. | 7th May 1924 | Box 72 \ 3 scan0349 | |
| Design of a split pedal foot plate and recommending the use of steel screws over brass ones. | 8th May 1924 | Box 72 \ 3 scan0350 | |
| Engine clutch casing, inspection cover, and adjustment possibilities. | 31th Jan 1924 | Box 72 \ 3 scan0351 | |
| Comparisons and modifications for an EAC clutch, including analysis of vibration issues. | 2nd Feb 1924 | Box 72 \ 3 scan0352 | |
| Calculation and diagram comparing the moment of inertia of E.A.C. and Goshawk clutch plates. | 19th Feb 1924 | Box 72 \ 3 scan0353 | |
| EAC clutch design, weight issues, and alternative friction materials. | 19th Feb 1924 | Box 72 \ 3 scan0354 | |
| Drawing No.Lec.1836 for an E.A.C. clutch, detailing a change from a steel to a ferodo driven disc. | 2nd Feb 1924 | Box 72 \ 3 scan0355 | |
| Clutch dragging issues when gearbox oil is hot and the trial of a temporary clutch brake. | 1st Feb 1924 | Box 72 \ 3 scan0356 | |
| Secret memorandum discussing potential improvements and alternatives for clutches, specifically for 'EAC's'. | 4th Mar 1924 | Box 72 \ 3 scan0357 | |
| Designs for a clutch brake, highlighting the need for a quick-stopping mechanism. | 12th May 1924 | Box 72 \ 3 scan0358 | |
| Secret memorandum detailing a clutch disengagement fault caused by gravity and the design of a new fitting to fix it. | 12th May 1924 | Box 72 \ 3 scan0359 | |
| Design options for an engine's exhaust ejector and cutout system. | 2nd Feb 1924 | Box 72 \ 3 scan0360 | |
| Page two of a document discussing the fitting of a component to the rear of a silencer. | 14th Mar 1924 | Box 72 \ 3 scan0361 | |
| Need for a new exhaust, silencer, and cutout system for the E.A.C. engine. | 14th Mar 1924 | Box 72 \ 3 scan0362 | |
| Secret internal report on alterations to brake systems, exhaust pipes, and silencers. | 27th Mar 1924 | Box 72 \ 3 scan0363 | |
| Revised calculations for an E.A.C. Dynamo. | 19th Mar 1923 | Box 72 \ 4 scan0001 | |
| Page of calculations for armature and field coil specifications, including resistance and length. | 19th Mar 1923 | Box 72 \ 4 scan0002 | |
| Table detailing magnetic circuit calculations for various electrical components. | 19th Mar 1923 | Box 72 \ 4 scan0003 | |
| Calculations for wire winding specifications, including resistance, turns, and current. | 19th Mar 1923 | Box 72 \ 4 scan0004 | |
| Specification sheet detailing the principal quantities and calculations for an electrical component. | 26th Apr 1926 | Box 72 \ 4 scan0005 | |
| Schematics for the EAC.7 chassis rear end components. | 26th Apr 1926 | Box 72 \ 4 scan0006 | |
| Development of the Goshawk back axle and gearbox for silent operation. | 21th Dec 1922 | Box 72 \ 4 scan0007 | |
| Goshawk and Seagull models, focusing on axle design, gearbox redesign, and experimental production. | 12th Dec 1922 | Box 72 \ 4 scan0008 | |
| Drawing No.LeC.1658 for the 'Seagull' engine X.9810. | 12th Dec 1922 | Box 72 \ 4 scan0009 | |
| Proposed experiment for damping the Hawk-Northcliffe & 'Seagull' power units using flexible arms and friction discs. | 9th Jan 1923 | Box 72 \ 4 scan0010 | |
| Prioritizing the 'Seagull' chassis development over the 'Stork' & 'Heron' and expressing concern about front-wheel brakes. | 31th Jan 1923 | Box 72 \ 4 scan0011 | |
| Confidential memorandum discussing design concerns and arranging a mock-up for the 'Seagull' model bonnet. | 1st Feb 1923 | Box 72 \ 4 scan0012 | |
| Secrecy concerns around using outside coachbuilders for the 'Seagull' project. | 1st Feb 1923 | Box 72 \ 4 scan0013 | |
| Telegram from Royce to Hives regarding Seagull engine policy and the Goshawk engines. | 1st Mar 1935 | Box 72 \ 4 scan0014 | |
| Development direction for the Goshawk and Seagull projects, focusing on chassis and universal joint reliability. | 7th Feb 1923 | Box 72 \ 4 scan0015 | |
| Preliminary general arrangement drawing N.sch.1374 for the 'SEAGULL' project. | 9th Feb 1923 | Box 72 \ 4 scan0016 | |
| Secret memo discussing plans for experimental bodies for EAC and a modified 40/50 chassis. | 20th Feb 1923 | Box 72 \ 4 scan0017 | |
| Test rig for a new method of fixing cheeses on a steering mechanism, replacing a screwed-in trunnion pin design. | 3rd Mar 1923 | Box 72 \ 4 scan0018 | |
| To arrange the purchase of scrap gun mountings and armourplating from Cammell Laird & Co. Ltd. | 7th Mar 1923 | Box 72 \ 4 scan0019 | |
| The progress of the E.A.C. job, highlighting delays due to incomplete information. | 21th Mar 1923 | Box 72 \ 4 scan0020 | |
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