| Description | Date | Identifier | |
| Steering efficiency, wear after 10,000 miles, and leverage comparisons for EAC 'V' series and Hispano cars. | 25th Sep 1924 | Box 67 \ 3 scan0110 | |
| Graph showing the percentage increase of Hispano steering leverage relative to the E.A.C. V series. | 6th Apr 1925 | Box 67 \ 3 scan0111 | |
| Graph plotting the instantaneous steering leverage ratio against the rotation of the steering wheel for the E.A.C.V series. | 6th Apr 1925 | Box 67 \ 3 scan0112 | |
| Graph of experimental results for Hispano-Suiza steering leverage, comparing individual stub axles and their mean against another series. | 6th Apr 1928 | Box 67 \ 3 scan0113 | |
| To Mr. Hardy about a telegram from Mr. Royce concerning the Steering Box question and a visit to Derby. | 7th Apr 1925 | Box 67 \ 3 scan0114 | |
| Secret internal memorandum discussing an investigation into a steering binding issue. | 9th Apr 1925 | Box 67 \ 3 scan0115 | |
| Internal memorandum discussing the design and performance of the 'V' Series steering system. | 15th Apr 1925 | Box 67 \ 3 scan0116 | |
| Page of notes discussing steering geometry, leverage, and potential issues with the cross tube and pivot. | 15th Apr 1925 | Box 67 \ 3 scan0117 | |
| Copy of a telegram with instructions and observations on vehicle performance and design. | 15th Apr 1925 | Box 67 \ 3 scan0118 | |
| Four potential chassis improvements for a future car, covering exhaust, overheating, suspension, and steering. | 15th Apr 1925 | Box 67 \ 3 scan0119 | |
| The failure of a steering column flange during 'V' series tests in France. | 17th Apr 1925 | Box 67 \ 3 scan0120 | |
| Secret memo discussing EAC steering effort calculations and a proposed frictionless platform test. | 20th Apr 1925 | Box 67 \ 3 scan0121 | |
| Secret memo on efficiency tests for 'EAC' steering boxes using different nut materials. | 20th Apr 1925 | Box 67 \ 3 scan0122 | |
| Secret memo discussing the fitting of a steering column flange and a proposed modification to simplify the process. | 22th Apr 1925 | Box 67 \ 3 scan0123 | |
| Modification to a steering column flange stiffener. | 22th Apr 1925 | Box 67 \ 3 scan0124 | |
| Blueprint for a revised stiffener for a steering column flange. | 22th Apr 1925 | Box 67 \ 3 scan0125 | |
| Secret memo regarding a steering column failure on a 'V' Series car after 5,400 miles in France. | 22th Apr 1925 | Box 67 \ 3 scan0126 | |
| Sketch of a flanged pipe connection with four bolt holes. | 23th Apr 1925 | Box 67 \ 3 scan0127 | |
| Modifications to the E.A.C. steering box as per N. scheme 1981. | 23th Apr 1925 | Box 67 \ 3 scan0128 | |
| Summary of experimental work and various design schemes for steering columns and their components. | 24th Apr 1925 | Box 67 \ 3 scan0129 | |
| Design modifications, material specifications, and dimensional alterations to a production scheme. | 24th Apr 1925 | Box 67 \ 3 scan0130 | |
| Confirmation of a wire detailing a fix for a steering trouble by fitting and mounting boxes differently. | 27th Apr 1925 | Box 67 \ 3 scan0131 | |
| Issues of heavy steering on the 40/50 model and proposing various design modifications. | 27th Apr 1925 | Box 67 \ 3 scan0132 | |
| Modifications to the 'V' Series steering column and the implications for dashboard drilling. | 27th Apr 1925 | Box 67 \ 3 scan0133 | |
| Production delay for 'V' Series Steering, pending instructions for a roller bearing scheme and whitemetal nut. | 27th Apr 1925 | Box 67 \ 3 scan0134 | |
| Proposal for lower-geared steering and suggesting a trial chassis be prepared for evaluation. | 27th Apr 1925 | Box 67 \ 3 scan0135 | |
| Secret memo about trying a new steering box mounting arrangement for the 'V' Series. | 28th Apr 1925 | Box 67 \ 3 scan0136 | |
| Extract discussing steering box fitting issues and proposed solutions for 40/50 and EAC models. | 29th Apr 1925 | Box 67 \ 3 scan0137 | |
| Design change for the 'V' Series steering column, replacing a pressed flange with a drop forging. | 29th Apr 1925 | Box 67 \ 3 scan0138 | |
| Secret memo discussing steering component modifications and experiments for 'V' Series cars. | 30th Apr 1925 | Box 67 \ 3 scan0139 | |
| Experimental spring-driven damped pendulum lever designed to improve steering and reduce wobbles. | 30th Apr 1925 | Box 67 \ 3 scan0140 | |
| Cancelling the .9375 lead worm for the E.A.C. 'V' Series steering and confirming interest in a 1' lead worm. | 1st May 1925 | Box 67 \ 3 scan0141 | |
| Modifications and production decisions for E.A.C. steering components. | 4th May 1925 | Box 67 \ 3 scan0142 | |
| Steering faults on the EAC 'V' Series vehicle during endurance testing. | 1st May 1925 | Box 67 \ 3 scan0143 | |
| Criticisms of a car in France involving the chief tester, Mr. Hancock. | 22th May 1925 | Box 67 \ 3 scan0144 | |
| Tests conducted on the EAC's steering to assess the effect of altering steering arm angles. | 22th May 1925 | Box 67 \ 3 scan0145 | |
| Technical bulletin detailing the causes and solutions for high-speed steering wobbles. | 22th Jun 1925 | Box 67 \ 3 scan0146 | |
| Comparing their steering system with Hispano's and discussing potential improvements. | 29th Jun 1925 | Box 67 \ 3 scan0147 | |
| Technical memo discussing improvements and considerations for steering systems, including the EAC.7 scheme. | 2nd Jul 1925 | Box 67 \ 3 scan0148 | |
| Request for a copy of a complaint regarding steering. | 2nd Jul 1925 | Box 67 \ 3 scan0149 | |
| Short typed memo acknowledging receipt of a communication and enclosing a copy of a requested memo. | 3rd Jul 1925 | Box 67 \ 3 scan0150 | |
| Customer criticism and safety concerns regarding the vehicle's steering gear. | 11th Jun 1925 | Box 67 \ 3 scan0151 | |
| Improvement of steering gear design and the concept of irreversibility. | 1st Jul 1925 | Box 67 \ 3 scan0152 | |
| Confirmation of a telegram with instructions for steering modifications. | 1st Jul 1925 | Box 67 \ 3 scan0153 | |
| Telegram from Royce with instructions for steering modifications and tests. | 1st Jul 1925 | Box 67 \ 3 scan0154 | |
| Confidential memo on steering, comparing company practice with Sunbeam and Hispano cars and quoting an Autocar magazine article. | 1st Jul 1925 | Box 67 \ 3 scan0155 | |
| Different steering mechanisms, their disadvantages regarding shocks and heaviness, and plans for a new design. | 1st Jul 1925 | Box 67 \ 3 scan0156 | |
| Troublesome car purchased in Chichester, which was suspected to have a broken crankshaft. | 1st Jul 1925 | Box 67 \ 3 scan0157 | |
| Modifications to the 'V' Series steering gear box to increase irreversibility. | 1st Jul 1925 | Box 67 \ 3 scan0158 | |
| Confirming a telegram about urgent modifications to a steering system to fix wobbles for a chassis demonstration. | 1st Jul 1925 | Box 67 \ 3 scan0159 | |
| Telegram from Royce regarding urgent steering modifications for a demonstration chassis. | 2nd Jul 1925 | Box 67 \ 3 scan0160 | |
| Proposing a rig to measure steering friction and a request for an update on the 20 HP model. | 3rd Jul 1925 | Box 67 \ 3 scan0161 | |
| Different steering gear systems, including the Marles system, and their effects on road shocks and stability. | 10th Jul 1925 | Box 67 \ 3 scan0162 | |
| Requesting particulars on efficiency tests for worm and trunnion steering components. | 10th Jul 1925 | Box 67 \ 3 scan0163 | |
| Importance of wheel balance to prevent high-speed steering wobbles. | 13th Jul 1925 | Box 67 \ 3 scan0164 | |
| Causes and solutions for high-speed steering wobbles. | 22th Jun 1925 | Box 67 \ 3 scan0165 | |
| Technical memorandum replying to questions regarding steering gear, specifically addressing the issue of steering wobbles. | 15th Jul 1925 | Box 67 \ 3 scan0166 | |
| Continued letter discussing tyre wobbles caused by out-of-balance Dunlop tyres and the subsequent correspondence. | 30th Jun 1925 | Box 67 \ 3 scan0167 | |
| Letter to Dunlop Rubber Co. Ltd. about high-speed bounce and wobble issues with balloon tyres. | 30th Jun 1925 | Box 67 \ 3 scan0168 | |
| Dangerous wheel wobble, its out-of-balance causes, and the need for a correction before manufacture. | 15th Jul 1925 | Box 67 \ 3 scan0169 | |
| Faulty steering and out-of-balance tyres on 'V' Series chassis. | 15th Jul 1925 | Box 67 \ 3 scan0170 | |
| Instruction from Mr. Royce to manufacture a worm and nut for the 'V' series steering system. | 7th Jul 1925 | Box 67 \ 3 scan0171 | |
| Technical memorandum discussing steering system improvements and comparisons with competitor designs. | 17th Jul 1925 | Box 67 \ 3 scan0172 | |
| Sending a new large diameter steering worm for trial at Mr. Royce's request. | 18th Jul 1925 | Box 67 \ 3 scan0173 | |
| Mr. Royce's request for an irreversible worm and damped pendulum lever to be fitted to his car. | 20th Jul 1925 | Box 67 \ 3 scan0174 | |
| Testing the efficiency of steering. | 21th Jul 1925 | Box 67 \ 3 scan0175 | |
| The analysis of friction losses in the E.A.C. steering box. | 21th Jul 1925 | Box 67 \ 3 scan0176 | |
| Efficiency and friction test results for a nut and screw, cheeses, and a rocker shaft. | 21th Jul 1925 | Box 67 \ 3 scan0177 | |
| Diagrams illustrating the apparatus and results for measuring friction losses and efficiency in an E.A.C. steering box. | 20th Jul 1925 | Box 67 \ 3 scan0178 | |
| Graph showing the mechanical efficiency of an E.A.C.V. steering box under increasing loads. | 21th Jul 1925 | Box 67 \ 3 scan0179 | |
| Graph plotting the mechanical efficiency of an E.A.C.V. steering box with increasing loads in the side steering tube. | 21th Jul 1925 | Box 67 \ 3 scan0180 | |
| Urging the adoption of steering improvements for the 7-EX car. | 24th Jul 1925 | Box 67 \ 3 scan0181 | |
| Requesting further data on the efficiency of various steering nut mechanisms, including reversibility. | 24th Jul 1925 | Box 67 \ 3 scan0182 | |
| High-speed steering wobbles, potential causes, and comparisons between different car models. | 1st Aug 1925 | Box 67 \ 3 scan0183 | |
| Testing two 20 HP cars with and without balloon tyres to address steering wobble and ride quality. | 11th Aug 1925 | Box 67 \ 3 scan0184 | |
| Telegram from Royce to Hives requesting a meeting to discuss issues with the Vacuum Tank, Steering Stop, and Condor cam shafts. | 11th Aug 1925 | Box 67 \ 3 scan0185 | |
| Cover for the damped pendulum lever, its construction, and potential adaptation for a 'V' series bonnet. | 1st Aug 1925 | Box 67 \ 3 scan0186 | |
| Investigations into high-speed steering wobbles. | 12th Aug 1925 | Box 67 \ 3 scan0187 | |
| High-speed steering wobble, its relationship with tyre pressure, and the effect of side steering tube springs. | 12th Jun 1925 | Box 67 \ 3 scan0188 | |
| Ongoing steering tests for the 'V' Series, noting part manufacturing delays and confirmed benefits for low-speed steering wobbles. | 18th Aug 1925 | Box 67 \ 3 scan0189 | |
| Causes and potential solutions for high-speed steering wobble, referencing specific car models and tyre issues. | 13th Aug 1925 | Box 67 \ 3 scan0190 | |
| Requesting an investigation into the causes and properties of high-speed steering wobbles. | 25th Aug 1925 | Box 67 \ 3 scan0191 | |
| Cover letter for a list of experiments on steering wobbles as instructed by Mr. Royce. | 15th Aug 1925 | Box 67 \ 3 scan0192 | |
| From Mr. Royce detailing experiments to investigate high-speed steering wobbles on various chassis. | 15th Aug 1925 | Box 67 \ 3 scan0193 | |
| Plan to stiffen a car frame with gussets and stay plates, comparing the Phantom and Silver Ghost models. | 15th Aug 1925 | Box 67 \ 3 scan0194 | |
| Series of questions regarding vehicle dynamics, steering, and wheel balance for the 40/50 or Phantom models. | 8th Aug 1925 | Box 67 \ 3 scan0195 | |
| Responding to Lord Montagu's complaints about steering column rigidity and the Autovac system. | 8th Aug 1925 | Box 67 \ 3 scan0196 | |
| Continuation page discussing the normal position of the ignition lever. | 8th Aug 1925 | Box 67 \ 3 scan0197 | |
| Potential improvements and modifications to a steering system, including worms, levers, and dampers. | 8th Aug 1925 | Box 67 \ 3 scan0198 | |
| High-speed steering wobble, its potential causes like balloon tyres, and proposed modifications to the steering and suspension. | 8th Aug 1925 | Box 67 \ 3 scan0199 | |
| Causes and potential solutions for high-speed wobbles, focusing on weight distribution and tyre balance. | 8th Aug 1925 | Box 67 \ 3 scan0200 | |
| Handling issues of the New Phantom, focusing on weight distribution, chassis flexibility, and tyre performance. | 8th Aug 1925 | Box 67 \ 3 scan0201 | |
| Phantom steering, attributing the problem to balloon tyres and suggesting a hydraulic damper. | 8th Aug 1925 | Box 67 \ 3 scan0202 | |
| Wheel balancing for Phantom models, discussing the problems with temporary balance weights and sourcing of properly balanced parts. | 19th Aug 1925 | Box 67 \ 3 scan0203 | |
| Continuation page discussing steering and suspension improvements to prevent vehicle wobbles. | 20th Aug 1925 | Box 67 \ 3 scan0204 | |
| Steering wobble, tyre pressures, and wheel balancing based on test results and customer instruction. | 20th Aug 1925 | Box 67 \ 3 scan0205 | |
| Arranging collection of car 46-PK for fitting a new larger diameter worm steering and other improvements. | 20th Aug 1925 | Box 67 \ 3 scan0206 | |
| Steering wobble issues experienced on Phantom and Silver Ghost models. | 1st Aug 1925 | Box 67 \ 3 scan0207 | |
| High-speed steering wobbles caused by low-pressure tyres on 40/50 HP cars. | 20th Apr 1925 | Box 67 \ 3 scan0208 | |
| Page 2 of an experimental report on a delayed test for a scheme to solve steering wobbles. | 20th Apr 1925 | Box 67 \ 3 scan0209 | |
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