| Description | Date | Identifier | |
| Extract of notes on chassis trials, covering road springs, steering, body, and floorboards. | 7th Jul 1920 | Box 80 \ 1 scan0093 | |
| Proposing a scheme for a plain thrust steering column with journal ball bearings to make the steering less reversible. | 2nd Aug 1920 | Box 80 \ 1 scan0094 | |
| The completion and fitting of new parts for a steering column modification. | 6th Aug 1920 | Box 80 \ 1 scan0095 | |
| Temporary scheme and experiments for a steering journalball bearing. | 9th Aug 1920 | Box 80 \ 1 scan0096 | |
| Maintenance jobs carried out on a Hawk-Northcliffe chassis, specifically addressing dynamo and steering issues. | 17th Aug 1920 | Box 80 \ 1 scan0097 | |
| Report comparing the steering and handling of experimental cars 1.EX and 6.EX at high speeds. | 23th Aug 1920 | Box 80 \ 1 scan0098 | |
| Continued page of a report discussing vehicle stability on a curved track using an analogy of a belt on a pulley. | 23th Aug 1920 | Box 80 \ 1 scan0099 | |
| American sketches and potential solutions for steering wobble issues. | 1st Aug 1920 | Box 80 \ 1 scan0100 | |
| Suggestions for the possible causes of steering wobbles. | 19th Feb 1920 | Box 80 \ 1 scan0101 | |
| Analysis of the causes and potential remedies for wheel wobble and oscillation in a vehicle. | 9th Sep 1920 | Box 80 \ 1 scan0102 | |
| Combinations of modifications to improve steering and prevent 'wobbles'. | 9th Sep 1920 | Box 80 \ 1 scan0103 | |
| Steering complaints and the results of tests and experiments. | 9th Sep 1920 | Box 80 \ 1 scan0104 | |
| Causes of steering wobbles and attempts to rectify the issue. | 9th Sep 1920 | Box 80 \ 1 scan0105 | |
| Investigation into the cause of wheel wobble by observing the behaviour of a free-running front wheel with varying pivot angles. | 9th Sep 1920 | Box 80 \ 1 scan0106 | |
| Technical report discussing car instability, steering wobble, and solutions involving friction in the pivots and springs. | 9th Sep 1920 | Box 80 \ 1 scan0107 | |
| Steering system tests, focusing on friction, pivot design, and remedying 'steering wobbles'. | 9th Sep 1920 | Box 80 \ 1 scan0108 | |
| Tests and potential solutions for steering wobbles, including wheels, tyres, and friction devices. | 9th Sep 1920 | Box 80 \ 1 scan0109 | |
| Front axle wear, steering difficulty at full lock, and the use of a plain thrust washer to apply friction. | 9th Sep 1920 | Box 80 \ 1 scan0110 | |
| Letter from Rolls-Royce of America discussing suggested design changes to overcome steering wobbles on the right-hand steering pivot. | 7th Oct 1920 | Box 80 \ 1 scan0111 | |
| Steering wobbles in the 40/50 HP chassis following a visit to West Wittering. | 5th Oct 1920 | Box 80 \ 1 scan0112 | |
| Examination of plain thrust washers used to provide friction in the steering system on experimental cars. | 4th Nov 1920 | Box 80 \ 1 scan0113 | |
| Fitting of plain thrust washers and a new design for pivot pins with a slow taper. | 1st Nov 1920 | Box 80 \ 1 scan0114 | |
| Standardisation of steering pivot pins made with a slow taper for fitting to the axle. | 8th Nov 1920 | Box 80 \ 1 scan0115 | |
| Technical memo discussing the examination of plain thrust washers used to provide friction in steering on experimental cars. | 4th Nov 1920 | Box 80 \ 1 scan0116 | |
| Fitting plain thrust washers to existing cars and a new tapered pivot pin design. | 4th Nov 1920 | Box 80 \ 1 scan0117 | |
| Instruction sheet detailing steering test results with different tyre pressures and types. | 29th Jan 1923 | Box 80 \ 1 scan0118 | |
| Test results for a slightly bent steering lever from the Sheffield Testing Works. | 29th Apr 1912 | Box 80 \ 1 scan0119 | |
| Instruction memo regarding the production and progress of cross-steering levers. | 20th Sep 1913 | Box 80 \ 1 scan0120 | |
| The progress of a forging drawing for a cross steering lever. | 22th Sep 1913 | Box 80 \ 1 scan0121 | |
| Improvement and stress testing of steering levers to prevent torsional fractures. | 24th Nov 1913 | Box 80 \ 1 scan0122 | |
| Strengthening of a steering lever for torsion, including ongoing experiments and alterations to standard parts. | 29th Nov 1913 | Box 80 \ 1 scan0123 | |
| Alterations to cross steering levers, suggesting material savings and dimensional changes. | 9th Dec 1913 | Box 80 \ 1 scan0124 | |
| The bumping test of special cross steering levers F3727/8 - X.701. | 2nd Mar 1914 | Box 80 \ 1 scan0125 | |
| Test report detailing the failure times of parts C446 and C447, and the weight of lever F3727. | 6th Mar 1914 | Box 80 \ 1 scan0126 | |
| Undersized hand-forged steering levers breaking and the need for further reinforcement. | 6th Mar 1914 | Box 80 \ 1 scan0127 | |
| The alteration of a drawing for Cross Steering Levers to increase their dimensions. | 5th Apr 1914 | Box 80 \ 1 scan0128 | |
| Results of life-cycle bumping tests on steering levers. | 27th May 1914 | Box 80 \ 1 scan0129 | |
| Test report sheet detailing the results of endurance tests on various steering levers. | 27th May 1914 | Box 80 \ 1 scan0130 | |
| Table detailing the average life before breakage for various steering levers. | 10th Jun 1914 | Box 80 \ 1 scan0131 | |
| Directive regarding the strengthening of the cross steering lever and implementation of a new double lever design. | 10th Jun 1914 | Box 80 \ 1 scan0132 | |
| Advisability of changing cross steering levers on existing cars. | 1st Jul 1914 | Box 80 \ 1 scan0133 | |
| Analysis of a bumping test regarding leather packings, steering wobbles, and spring strength. | 1st Jul 1914 | Box 80 \ 1 scan0134 | |
| The proactive replacement of steering tubes and an assessment of the cross steering lever. | 3rd Jul 1914 | Box 80 \ 1 scan0135 | |
| Necessity of changing levers on cars, leaving the final decision to the recipient and Mr. Royce. | 4th Jun 1914 | Box 80 \ 1 scan0136 | |
| Abandoning leather packing for springs and testing cross steering levers for spring bolts. | 6th Jul 1914 | Box 80 \ 1 scan0137 | |
| Testing of a cross steering lever on a bumping rig. | 9th Jul 1914 | Box 80 \ 1 scan0138 | |
| Stress analysis of old and new type cross steering levers, noting a 36% reduction in the new design. | 14th Jul 1914 | Box 80 \ 1 scan0139 | |
| Failure of a cross steering lever during a bumping test. | 16th Jul 1914 | Box 80 \ 1 scan0140 | |
| Improvements and testing for a cross steering lever. | 18th Jul 1914 | Box 80 \ 1 scan0141 | |
| Seeking confirmation on the road-worthiness of cross steering levers, referencing a prior comment by Mr. Royce. | 11th Jul 1914 | Box 80 \ 1 scan0142 | |
| Broken cross steering lever, detailing undersized dimensions and subsequent modifications to the design and dies. | 18th Jul 1914 | Box 80 \ 1 scan0143 | |
| Dimensions of levers, with a diagram showing the cross-section measurements. | 18th Jul 1914 | Box 80 \ 1 scan0144 | |
| Later design of Cross Steering Lever breaking during bumping tests. | 21th Jul 1914 | Box 80 \ 1 scan0145 | |
| Policy for changing steering tubes and cross steering levers. | 22th Jul 1914 | Box 80 \ 1 scan0146 | |
| Print of a fractured oval section steering lever and a suggestion for reinforcement. | 4th Nov 1914 | Box 80 \ 1 scan0147 | |
| Lifespan and potential design improvements for front axle parts. | 7th May 1915 | Box 80 \ 1 scan0148 | |
| Telegram detailing testing procedures and modifications for Zephyr pistons, connecting rods, and a cross steering lever. | 17th May 1915 | Box 80 \ 1 scan0149 | |
| Modification to a broken steering arm to increase its fracture resistance by 30% in depth. | 26th May 1915 | Box 80 \ 1 scan0150 | |
| Fracture in cross steering levers and comparing original 'A' type with a strengthened 'D' model. | 31th May 1915 | Box 80 \ 1 scan0151 | |
| The testing and improvement of cross steering levers. | 3rd Jun 1915 | Box 80 \ 1 scan0152 | |
| Improvements for the steering ball end on the 40/50 HP chassis. | 25th Nov 1918 | Box 80 \ 1 scan0153 | |
| Extract discussing an experimental joint and a defect in the bearing pad design for a 40/50 HP chassis. | 26th Nov 1918 | Box 80 \ 1 scan0154 | |
| Extract regarding modifications and defects in the steering gear for the 40/50 HP chassis. | 26th Apr 1917 | Box 80 \ 1 scan0155 | |
| Modifications to the steering gear design for the 45/50 HP chassis. | 29th Nov 1918 | Box 80 \ 1 scan0156 | |
| Modification to the cross steering ball end lever, instructing the Experimental Department to issue parts. | 2nd Jan 1919 | Box 80 \ 1 scan0157 | |
| Assembly parts list for Chassis 1. E.X. | 30th Jun 1919 | Box 80 \ 1 scan0158 | |
| Extract listing new parts to be fitted to the chassis and their standardisation status. | 27th Aug 1919 | Box 80 \ 1 scan0159 | |
| The completion status of several experimental engineering works. | 10th Oct 1919 | Box 80 \ 1 scan0160 | |
| List of parts to be fitted to a chassis for a 10,000-mile test run. | 19th Nov 1919 | Box 80 \ 1 scan0161 | |
| List of new parts fitted to a car scheduled for a 10,000-mile run, along with remarks for the modifications. | 5th Jan 1920 | Box 80 \ 1 scan0162 | |
| The 10,000-mile test of the 2.EX Chassis, detailing battery issues and listing parts for standardization. | 9th Apr 1920 | Box 80 \ 1 scan0163 | |
| Standardisation proposal for redesigned steering levers and ball ends to improve the design. | 30th Aug 1923 | Box 80 \ 1 scan0164 | |
| The standardisation of chassis parts, specifically steering levers and ball ends, and their stock value. | 19th Sep 1923 | Box 80 \ 1 scan0165 | |
| Standardisation sheet for an improved taper type ball end for the 40/50 chassis. | 24th Sep 1923 | Box 80 \ 1 scan0166 | |
| Extract discussing modifications to the steering gear end joints for the 40/50 HP chassis. | 26th Nov 1918 | Box 80 \ 1 scan0167 | |
| Extract from a memorandum discussing proposed modifications to the steering gear design for the 45/50 HP Chassis. | 26th Apr 1917 | Box 80 \ 1 scan0168 | |
| Material modifications for a side steering tube. | 11th Jun 1919 | Box 80 \ 1 scan0169 | |
| Build sheet detailing the components assembled for Chassis 1. E.X. | 30th Jun 1919 | Box 80 \ 1 scan0170 | |
| Setup and results of a 40/50 chassis bumping test. | 8th Aug 1919 | Box 80 \ 1 scan0171 | |
| Log detailing component failures, their run times, and associated remarks. | 16th Apr 1919 | Box 80 \ 1 scan0172 | |
| Steering difficulty attributed to rear spring flexibility and proposing diagnostic tests. | 26th Jan 1930 | Box 80 \ 1 scan0173 | |
| Requesting the fitting of fibre washers to steering pivots to add damping friction, with an accompanying diagrammatic sketch. | 26th Jan 1920 | Box 80 \ 1 scan0174 | |
| Testing the effects of split versus solid springs on steering, roll, and axle bounce. | 20th Feb 1920 | Box 80 \ 1 scan0175 | |
| Springs in side steering tubes, comparing the setup in a Hispano car to a standard 40/50 model. | 12th Jul 1923 | Box 80 \ 1 scan0176 | |
| Instruction to manufacture three sets of parts for a side steering tube experiment using Nickel Steel. | 9th Jun 1919 | Box 80 \ 1 scan0177 | |
| Request to manufacture three sets of side steering tube parts in nickel steel for testing. | 9th Jun 1919 | Box 80 \ 1 scan0178 | |
| Material modifications for a side steering tube. | 11th Jun 1919 | Box 80 \ 1 scan0179 | |
| Cancelling instructions for a sliding piece and requesting three sets of outer and inner plugs for a side steering tube. | 23th Jun 1919 | Box 80 \ 1 scan0180 | |
| Extract listing new parts to be fitted to a chassis as soon as possible. | 27th Aug 1919 | Box 80 \ 1 scan0181 | |
| From RHC to EFC regarding the completion of experimental work on battery terminals and steering tube contact pieces. | 7th Oct 1919 | Box 80 \ 1 scan0182 | |
| Approximate lengths of various cables required for a revised earthed wiring scheme. | 22th May 1919 | Box 80 \ 1 scan0183 | |
| Responding to points raised on Car 6.EX, covering the coil, wiring, luggage grid, and spare wheel carrier. | 30th Jun 1920 | Box 80 \ 1 scan0184 | |
| Cover letter for blueprints relating to a 'Goshawk' Side Steering Tube. | 19th Oct 1920 | Box 80 \ 1 scan0185 | |
| Notification of the issue of 2 blueprints for the arrangement of the Side Steering Tube for the 'Goshawk' Chassis. | 5th Jan 1921 | Box 80 \ 1 scan0186 | |
| Test report on the instability of G.1. steering on larger locks, and an experiment involving reversing the Micheline disc wheels. | 22th May 1925 | Box 80 \ 1 scan0187 | |
| Proposed side steering tube for 'Goshawk II'. | 13th Jan 1921 | Box 80 \ 1 scan0188 | |
| 'Goshawk II' side steering tube and related modifications to the steering gear box and frame. | 16th Feb 1921 | Box 80 \ 1 scan0189 | |
| From E. to D.R. detailing alterations for the 'Goshawk II' side steering tube. | 7th Mar 1921 | Box 80 \ 1 scan0190 | |
| Blueprints for the Goshawk II side steering tube. | 24th Mar 1921 | Box 80 \ 1 scan0191 | |
| Mr Royce's modifications to the Goshawk II side steering tube and requesting models be made for approval. | 18th May 1921 | Box 80 \ 1 scan0192 | |
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