| Description | Date | Identifier | |
| Summary report on steering and suspension arrangements, comparing performance on different road types. | 21th Aug 1926 | Box 17 \ 3 Scan051 | |
| Series of graphs showing various side steering tube spring arrangements and load/deflection characteristics for the Phantom model. | 23th Jul 1926 | Box 17 \ 3 Scan052 | |
| The reverse of a document showing a red stamp from the Print Room in Derby. | 23th Jul 1926 | Box 17 \ 3 Scan053 | |
| Technical drawing detailing a packing washer assembly for a front end, with various spring and washer configurations. | 1st Aug 1926 | Box 17 \ 3 Scan054 | |
| Steering performance, axle modifications, and shock absorbers on the 12-EX model. | 1st Aug 1926 | Box 17 \ 3 Scan055 | |
| Steering difficulties on the 12-IX model, related to tyre size, shock absorbers, and axle design. | 23th Aug 1926 | Box 17 \ 3 Scan056 | |
| Steering improvements on the 12-EX car, focusing on hydraulic dampers, steering geometry, and the impact of tyres on wobbles. | 23th Aug 1926 | Box 17 \ 3 Scan057 | |
| Preference for 6.75 inch tyres over 5 inch tyres, despite an increased risk of wobbles. | 23th Aug 1926 | Box 17 \ 3 Scan058 | |
| Requesting a closed car to be adapted with a new light axle, tyres, and hydraulic shock-absorbers for a steering test on car 12-EX. | 23th Aug 1926 | Box 17 \ 3 Scan059 | |
| Sending a Phantom car, chassis 8-EX, to London, fitted with a lightened front axle and hydraulic shock dampers. | 25th Aug 1926 | Box 17 \ 3 Scan060 | |
| Mr. Royce's disapproval of a submitted Phantom Steering scheme and the next job concerning a spring design. | 26th Aug 1926 | Box 17 \ 3 Scan061 | |
| Outlining plans to road test a modified Phantom car in France, focusing on the cooling system and front axle. | 26th Aug 1926 | Box 17 \ 3 Scan062 | |
| Letter from Chateauroux, France, discussing testing delays and feedback for a new axle on car 8-EX. | 31th Aug 1926 | Box 17 \ 3 Scan063 | |
| Preliminary steering and damper setting tests for the 12-EX car. | 1st Sep 1926 | Box 17 \ 3 Scan064 | |
| Tyre performance and its effects on vehicle steering and handling, including a graph of selectiveness versus tyre pressure. | 1st Sep 1926 | Box 17 \ 3 Scan065 | |
| Vehicle suspension issues related to wandering, insufficient damping, and the effect of oil viscosity. | 1st Sep 1926 | Box 17 \ 3 Scan066 | |
| Delay in completing steering tests on the 12-EX experimental car. | 1st Sep 1926 | Box 17 \ 3 Scan067 | |
| On steering tests in France detailing the decision to abandon a new side steering tube due to control issues during emergency braking. | 1st Sep 1926 | Box 17 \ 3 Scan068 | |
| Results of testing various Dunlop and Michelin tyres on a standard axle. | 2nd Sep 1926 | Box 17 \ 3 Scan069 | |
| Telegram providing engineering recommendations for vehicle components. | 2nd Sep 1926 | Box 17 \ 3 Scan070 | |
| Telegram from Chateauroux concerning an adjustment to side tube springs. | 1st Sep 1926 | Box 17 \ 3 Scan071 | |
| Revised 1500 lb. side steering tube springs to address overstressing issues. | 1st Sep 1926 | Box 17 \ 3 Scan072 | |
| Proposing a modification to the Phantom steering system by using a slower pitch worm gear. | 4th Sep 1926 | Box 17 \ 3 Scan073 | |
| Request for a summary of reports on wheel wobble and steering issues from a 10,000-mile test of low-pressure tires on Phantoms. | 9th Sep 1926 | Box 17 \ 3 Scan074 | |
| The performance of 6.75' Balloon Tyres, addressing issues like high-speed wobble and ride comfort. | 9th Sep 1926 | Box 17 \ 3 Scan075 | |
| Duplication of tests on Continental roads. | 2nd Aug 1926 | Box 17 \ 3 Scan076 | |
| Log sheet detailing steering performance issues and adjustments on the 12-EX car. | 2nd Aug 1926 | Box 17 \ 3 Scan077 | |
| Log of steering performance observations with corresponding dates and mileage. | 10th Aug 1926 | Box 17 \ 3 Scan078 | |
| Extract detailing tests and observations on the steering system of the 12-EX car. | 19th Aug 1926 | Box 17 \ 3 Scan079 | |
| Steering performance, tyre issues, and the condition of the steering column and box. | 23th Aug 1926 | Box 17 \ 3 Scan080 | |
| Standardized method for measuring steering friction on axles, with comparative test results. | 10th Sep 1926 | Box 17 \ 3 Scan081 | |
| Cover memo for a report on tests conducted in France on a lightened type front axle for the Phantom model. | 20th Sep 1926 | Box 17 \ 3 Scan082 | |
| Summary of tests on a lightened front axle, comparing it to a standard axle across various performance metrics. | 1st Sep 1926 | Box 17 \ 3 Scan083 | |
| Performance comparison report between a standard front axle and a new lightened front axle. | 1st Sep 1926 | Box 17 \ 3 Scan084 | |
| Report page detailing tests on low speed wobbles, friction in the steering, and tyre configurations. | 1st Sep 1926 | Box 17 \ 3 Scan085 | |
| Report page evaluating vehicle steering, suspension, and the performance of different tyre types and pressures. | 1st Sep 1926 | Box 17 \ 3 Scan086 | |
| Report page detailing tests on tyre behaviour, pressures, car control, and shock damper settings. | 1st Sep 1926 | Box 17 \ 3 Scan087 | |
| Test report page detailing vehicle suspension settings and their effects on anti-wobble, road holding, and steering characteristics. | 1st Sep 1926 | Box 17 \ 3 Scan088 | |
| Report page detailing tests on steering feel, high-speed wobble, shock absorption, and front road springs. | 1st Sep 1926 | Box 17 \ 3 Scan089 | |
| The performance of Lemoine 1250 and 1300 lbs springs. | 1st Sep 1926 | Box 17 \ 3 Scan090 | |
| Comparison of load versus deflection graphs for singly arranged and double rating spring systems. | 20th Sep 1926 | Box 17 \ 3 Scan091 | |
| Largely blank page with a library stamp in the bottom right corner. | 20th Sep 1926 | Box 17 \ 3 Scan092 | |
| Steering pivot friction, detailing issues with high and low-speed wobbles observed during tests on the New Phantom axle compared to the 20 HP model. | 20th Sep 1926 | Box 17 \ 3 Scan093 | |
| Tests on a new axle pivot arrangement to improve steering performance and reduce wobbles. | 1st Sep 1926 | Box 17 \ 3 Scan094 | |
| Test report on an experimental axle with vertical king pins, comparing it to a standard V-series axle. | 1st Sep 1926 | Box 17 \ 3 Scan095 | |
| Technical analysis of steering geometry, pivot types, and their effects on stability and road handling. | 1st Sep 1926 | Box 17 \ 3 Scan096 | |
| Steering performance issues, including sluggishness, road shocks, and wobbles. | 22th Sep 1926 | Box 17 \ 3 Scan097 | |
| Steering performance and pivot inclination, comparing a new axle design to a previous 'V' series. | 22th Sep 1926 | Box 17 \ 3 Scan098 | |
| Steering tests comparing a standard axle with a modified version using vertical king pins. | 22th Sep 1926 | Box 17 \ 3 Scan099 | |
| Steering effort, wheel centre position, and testing on a 20 HP axle. | 22th Sep 1926 | Box 17 \ 3 Scan100 | |
| Comparison of steering effort based on transverse pivot inclination for different axle series. | 22th Sep 1926 | Box 17 \ 3 Scan101 | |
| Blueprint comparing different axle and pivot configurations and their effect on steering heaviness. | 22th Sep 1926 | Box 17 \ 3 Scan102 | |
| Upcoming steering tests on castor pivots and modifications to rear hydraulic dampers. | 22th Sep 1926 | Box 17 \ 3 Scan103 | |
| Desirable friction levels and spring-loaded solutions for Phantom steering. | 23th Sep 1926 | Box 17 \ 3 Scan104 | |
| Adjustable spring-loaded friction in the New Phantom steering system. | 30th Sep 1926 | Box 17 \ 3 Scan105 | |
| Steering shock issues with the .940 worm compared to the 1125 and .720 types. | 30th Sep 1926 | Box 17 \ 3 Scan106 | |
| Testing of low pressure tyres on Phantom models and their effect on steering performance. | 6th Oct 1926 | Box 17 \ 3 Scan107 | |
| Tyre mileage, the reliability of low-pressure tyres, and the fitting of 6.75 inch tyres. | 6th Oct 1926 | Box 17 \ 3 Scan108 | |
| Letter from Dunlop Rubber Co. discussing tyre wear data for various sizes and seasons. | 23th Sep 1926 | Box 17 \ 3 Scan109 | |
| Standardisation of an anti-rattle device for the steering column controls. | 23th Sep 1926 | Box 17 \ 3 Scan110 | |
| Requesting a side steering tube be kept for further tests in France, rather than being returned. | 24th Sep 1926 | Box 17 \ 3 Scan111 | |
| Steering tests for the 12-EX model, focusing on wobble under various tyre pressure conditions. | 15th Nov 1926 | Box 17 \ 3 Scan112 | |
| Proposed use of a cast dash for the Phantom model, weighing objections and considering related modifications. | 17th Dec 1926 | Box 17 \ 3 Scan113 | |
| Instructions for the experimental production and fitting of side steering tube parts for an E.A.C.7 chassis. | 8th Jan 1927 | Box 17 \ 3 Scan114 | |
| Overly reversible steering on experimental car EAC-7 and proposing solutions. | 19th Jan 1927 | Box 17 \ 3 Scan115 | |
| Bench and road tests conducted on a hydraulic steering damper, discussing its effectiveness and further testing proposals. | 27th Jan 1927 | Box 17 \ 3 Scan116 | |
| Analysis and test proposal for a hydraulic steering damper, including calculations for joggle and bye-pass requirements. | 28th Jan 1927 | Box 17 \ 3 Scan117 | |
| Blueprint detailing the performance characteristics of a hydraulic steering damper, including oil viscosity and pressure/flow analysis. | 28th Jan 1927 | Box 17 \ 3 Scan118 | |
| Instructing the fitting of a steering damper for model EAC-V11, specifying the springs and leak dimensions. | 1st Feb 1927 | Box 17 \ 3 Scan119 | |
| Steering trouble on the EAC-V11 chassis and a proposal to experimentally fit standard unequal ended springs. | 1st Feb 1927 | Box 17 \ 3 Scan120 | |
| Concerns and tests regarding high-speed steering wobble on the EAC-V11 model. | 1st Feb 1927 | Box 17 \ 3 Scan121 | |
| Data table detailing the linear movement and inclination of suspension components for various chassis models. | 1st Mar 1927 | Box 17 \ 3 Scan122 | |
| Improvement to the EAC-Vll steering geometry. | 1st Mar 1927 | Box 17 \ 3 Scan123 | |
| Potential improvements to steering systems, focusing on irreversibility, wobble reduction, and steering speed. | 6th Mar 1927 | Box 17 \ 3 Scan124 | |
| Instruction to fit an oil retaining gland on the pendulum lever for the 12-EX car. | 7th Mar 1927 | Box 17 \ 3 Scan125 | |
| Steering geometry on the EAC.Vll model, related to front spring modifications and anchorage. | 7th Mar 1927 | Box 17 \ 3 Scan126 | |
| Solutions to steering geometry problems on a vehicle. | 8th Mar 1927 | Box 17 \ 3 Scan127 | |
| Modifications to the 'Phantom D' steering arrangement for a shorter leg reach. | 11th Mar 1927 | Box 17 \ 3 Scan128 | |
| Proposals and modifications for improving steering geometry. | 2nd Mar 1927 | Box 17 \ 3 Scan129 | |
| Steering geometry and the damped pendulum lever to address high and low-speed wobbles and shimmy. | 14th Mar 1927 | Box 17 \ 3 Scan130 | |
| Improving steering systems, addressing wobbles, and the concept of irreversible steering. | 14th Mar 1927 | Box 17 \ 3 Scan131 | |
| Improving steering performance by adjusting friction placement and spring centring. | 15th Mar 1927 | Box 17 \ 3 Scan132 | |
| Rejecting proposed alterations to the steering system, specifically a lower gear ratio. | 15th Mar 1927 | Box 17 \ 3 Scan133 | |
| Spring geometry, damping friction, and proposed improvements to the steering system. | 6th Mar 1927 | Box 17 \ 3 Scan134 | |
| Technical report discussing steering geometry and the effects of a damped pendulum lever on high and low-speed wobbles. | 14th Mar 1927 | Box 17 \ 3 Scan135 | |
| Improving steering systems by addressing wobbles, exploring irreversible steering, and noting component deterioration. | 14th Mar 1927 | Box 17 \ 3 Scan136 | |
| Report discussing the effectiveness of friction in the steering system to improve shock absorption and reduce sponginess. | 22th Mar 1927 | Box 17 \ 3 Scan137 | |
| Outlining eight potential improvements for vehicle steering systems. | 22th Mar 1927 | Box 17 \ 3 Scan138 | |
| List of favoured and avoided design combinations for a steering system. | 22th Mar 1927 | Box 17 \ 3 Scan139 | |
| Two ideas for improving steering geometry and reducing wobbles. | 22th Mar 1927 | Box 17 \ 3 Scan140 | |
| Improvement of steering geometry by comparing the 'bump' and 'rebound' characteristics of the Phantom and EAC.7 models. | 1st Apr 1927 | Box 17 \ 3 Scan141 | |
| Continued note on modifications to the EAC.7 geometry concerning the ball pin on the axle lever. | 1st Apr 1927 | Box 17 \ 3 Scan142 | |
| Development of steering geometry for the EAC.7 model, comparing it with Phantom and India models. | 1st Apr 1927 | Box 17 \ 3 Scan143 | |
| Continuation page discussing issues with modifications to the ball pin on the axle lever. | 7th Apr 1927 | Box 17 \ 3 Scan144 | |
| Alternative steering proposals and modifications, intended for Phantom cars. | 7th Apr 1927 | Box 17 \ 3 Scan145 | |
| Experimental development of a returning spring for a steering worm tube. | 4th Jul 1927 | Box 17 \ 3 Scan146 | |
| Steering geometry alterations, involving a modified dumb iron and a shortened pendulum lever. | 11th Apr 1927 | Box 17 \ 3 Scan147 | |
| Steering geometry of the Phantom model, comparing the EAC.7 with the 'V' series. | 12th Apr 1927 | Box 17 \ 3 Scan148 | |
| Steering performance of the Phantom 7-EX model after 10,000 miles and outlining proposed modifications. | 5th Mar 1927 | Box 17 \ 3 Scan149 | |
| Design of an improved front axle for the 20 HP model, based on the Phantom. | 11th May 1927 | Box 17 \ 3 Scan150 | |
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