| Description | Date | Identifier | |
| Distributing new standardisation sheets for steering pivot pins and thrust washers. | 24th Nov 1923 | Box 49 \ 4 Scan084 | |
| Friction in steering systems, specifically regarding the use and testing of plain thrust washers on experimental cars. | 4th Nov 1920 | Box 49 \ 4 Scan085 | |
| Fitting plain thrust washers to existing cars and a permanent design change for pivot pins. | 4th Nov 1920 | Box 49 \ 4 Scan086 | |
| Points for attention regarding post-war American car specifications following a visit to America. | 11th Nov 1920 | Box 49 \ 4 Scan087 | |
| Design scheme and specifications for the 'Kite' Front Axle. | 24th Dec 1920 | Box 49 \ 4 Scan088 | |
| New friction device for the front steering pivot and the effects of moisture on fibre washers. | 27th Jan 1922 | Box 49 \ 4 Scan089 | |
| Technical memo discussing the springing, weight, vibrations, and steering for the 'Goshawk' models. | 12th Jan 1921 | Box 49 \ 4 Scan090 | |
| Points of criticism raised by Mr. Royce regarding the 'Goshawk 11' steering and front spring shackle scheme. | 26th Jan 1921 | Box 49 \ 4 Scan091 | |
| Design change for the cross steering joint on the Goshawk 11 model. | 27th Jan 1921 | Box 49 \ 4 Scan092 | |
| Letter to British Timken Limited regarding the use of their bearings in front hubs. | 10th Feb 1921 | Box 49 \ 4 Scan093 | |
| Proposed wire wheel front axle design for the Goshawk II model. | 10th Feb 1921 | Box 49 \ 4 Scan094 | |
| Layout of a wire wheel with a vertical pivot and modifications to the hub. | 10th Dec 1920 | Box 49 \ 4 Scan095 | |
| Design of the 'Goshawk II' front axle, focusing on the choice between vertical pivots and different wheel types. | 17th Feb 1921 | Box 49 \ 4 Scan096 | |
| Blueprints for Scheme 690, concerning the arrangement of a Front Axle Cross Steering Tube for Michelin disc wheels. | 23th Mar 1921 | Box 49 \ 4 Scan097 | |
| Modification for easier lubrication of front pivots on the 40/50 chassis. | 1st Apr 1921 | Box 49 \ 4 Scan098 | |
| Material choice (steel vs Delta) for a cap related to the lubrication of front pivots on a 40/50 HP chassis. | 11th Apr 1921 | Box 49 \ 4 Scan099 | |
| Blueprints for a pin to prevent wheel holding studs rotating on the Goshawk II front axle. | 26th Apr 1934 | Box 49 \ 4 Scan100 | |
| Design approval for the Goshawk II front axle. | 18th Apr 1921 | Box 49 \ 4 Scan101 | |
| Scheme 901 for an experimental method of fastening springs to the front axle for the 40/50 HP model. | 4th Apr 1921 | Box 49 \ 4 Scan102 | |
| Change to the front axle spring pads for the Goshawk 11. | 25th Apr 1921 | Box 49 \ 4 Scan103 | |
| Inclination of the steering pivot on the Goshawk II front axle. | 26th Apr 1921 | Box 49 \ 4 Scan104 | |
| The defective fixing of the front axle to the spring, proposing modifications for the 40/50 HP and Goshawk 11 models. | 27th Apr 1921 | Box 49 \ 4 Scan105 | |
| Recommendation concerning the Goshawk 11 front axle and the inclination of its steering pivot. | 28th Apr 1921 | Box 49 \ 4 Scan106 | |
| Request for comments on a memo from Paris regarding front axles. | 13th Jul 1921 | Box 49 \ 4 Scan107 | |
| From the Paris branch regarding concerns over bent front axles on post-war chassis. | 6th Jul 1921 | Box 49 \ 4 Scan108 | |
| Extract from a memo discussing the need for evidence of damaged front axles and hypothesizing the cause of failure. | 14th Jul 1921 | Box 49 \ 4 Scan109 | |
| Instructing not to make a hole in the cross steering tube and to take precautions against spelter formation. | 1st Aug 1921 | Box 49 \ 4 Scan110 | |
| Use of straight-sided tyres on the Goshawk 11 chassis. | 15th Aug 1921 | Box 49 \ 4 Scan111 | |
| From Mr. Royce detailing urgent tests for the front axle system regarding front wheel brakes on a 40/50 HP chassis. | 28th Oct 1921 | Box 49 \ 4 Scan112 | |
| Recommendation to reconsider the design of steering stops as the current ones are heavy and bend easily. | 15th Nov 1921 | Box 49 \ 4 Scan113 | |
| Inquiring about the performance of Goshawk 11 cross steering tube joints. | 26th Nov 1921 | Box 49 \ 4 Scan114 | |
| Failure of a front axle during a Goshawk 11 bump test and recommending urgent modifications. | 26th Nov 1921 | Box 49 \ 4 Scan115 | |
| Instructions to remove 'Rolls-Royce' branding from the Goshawk II experimental chassis front axle and hub caps. | 9th Dec 1921 | Box 49 \ 4 Scan116 | |
| Requesting information on a fractured Goshawk 11 front axle to understand the cause of failure. | 13th Dec 1921 | Box 49 \ 4 Scan117 | |
| Broken Goshawk 11 front axle, discussing forging issues and proposing design improvements for strength and reliability. | 12th Dec 1921 | Box 49 \ 4 Scan118 | |
| Repeated breakage of the Goshawk 11 front axle. | 15th Dec 1921 | Box 49 \ 4 Scan119 | |
| Letter discussing the failure analysis of a Goshawk 11 front axle. | 17th Dec 1921 | Box 49 \ 4 Scan120 | |
| Test results for Goshawk pendulum levers, showing torsion, deflection, and permanent set under various weights. | 17th May 1931 | Box 49 \ 4 Scan121 | |
| Test results for torsion and bending on a 40/50 HP front axle to specification N.SCH.979. | 20th Dec 1921 | Box 49 \ 4 Scan122 | |
| The production and quality testing of the Goshawk 11 front axle and steering levers. | 21th Dec 1921 | Box 49 \ 4 Scan123 | |
| The failure of a Goshawk original type front axle due to a low factor of safety. | 1st Jan 1922 | Box 49 \ 4 Scan124 | |
| Arranging special compression and gear ratio tests for various cars, including the Goshawk model. | 6th Feb 1922 | Box 49 \ 4 Scan125 | |
| Requesting more information on a specimen steering wheel and confirming Mr. Royce's requirements for the Goshawk steering wheel to be covered in bakelite. | 8th Feb 1922 | Box 49 \ 4 Scan126 | |
| From 'Da.' detailing Mr. Royce's rejection of a requested modification for the rear spring shackle. | 7th Feb 1922 | Box 49 \ 4 Scan127 | |
| The difficulty in persuading customers that the necessary vertical play in steering swivels does not cause a rattling noise. | 17th Feb 1922 | Box 49 \ 4 Scan128 | |
| Cover letter for a memo and standardization sheet regarding a cross steering tube changeover and Hartford shock absorbers, requesting personal discussion with Mr. Royce. | 15th Mar 1922 | Box 49 \ 4 Scan129 | |
| Failure of cross steering levers on a Goshawk 11 vehicle via telegram correspondence. | 30th Mar 1922 | Box 49 \ 4 Scan130 | |
| Querying the specifics of bending cross steering levers on the Goshawk 11 model. | 1st Apr 1922 | Box 49 \ 4 Scan131 | |
| Steering defect on the Goshawk 11 car caused by gyroscopic torque. | 5th Apr 1922 | Box 49 \ 4 Scan132 | |
| New, strengthened design for the Goshawk 11 top steering lever on the front axle. | 5th Apr 1922 | Box 49 \ 4 Scan133 | |
| Design and specifications of Goshawk 11 steering levers, comparing specimens and modifications. | 6th Apr 1922 | Box 49 \ 4 Scan134 | |
| Stress analysis of a cross steering lever to meet Mr. Royce's requirements. | 7th Apr 1922 | Box 49 \ 4 Scan135 | |
| Containing Mr. Royce's instruction on the cross steering tube changeover procedure. | 7th Apr 1922 | Box 49 \ 4 Scan136 | |
| Cause and solution for a steering 'joggling' issue on the Goshawk II model. | 7th Apr 1922 | Box 49 \ 4 Scan137 | |
| Modifications to a Goshawk-11 side steering tube and a planned experimental replacement. | 8th Apr 1922 | Box 49 \ 4 Scan138 | |
| Cause of steering joggling in the Goshawk 11 model, suggesting it is due to gyroscopic action. | 10th Apr 1922 | Box 49 \ 4 Scan139 | |
| Instructions to produce cross steering ball joints for the 'Goshawk II' experimental chassis. | 27th Apr 1922 | Box 49 \ 4 Scan140 | |
| Design alterations for the Goshawk II cross steering tube. | 28th Apr 1922 | Box 49 \ 4 Scan141 | |
| Diagram specifying the steering lock angles for the Goshawk II. | 9th May 1932 | Box 49 \ 4 Scan142 | |
| Diagram detailing the steering lock angles for the Goshawk II. | 9th Sep 1932 | Box 49 \ 4 Scan143 | |
| Confirming experiments on the Goshawk II cross steering tube. | 10th May 1922 | Box 49 \ 4 Scan144 | |
| Query regarding the forward inclination of pivots on the Goshawk II front axle to update the drawings. | 18th May 1922 | Box 49 \ 4 Scan145 | |
| Instructions detailing a weight comparison of a South Front Axle assembly with hubs and tyres. | 20th May 1922 | Box 49 \ 4 Scan146 | |
| Modifications for the Goshawk 11 front axle, detailing spring attachment methods. | 5th May 1922 | Box 49 \ 4 Scan147 | |
| Statement of case against criticisms of the Goshawk 'B' steering and driver comfort issues in a limousine. | 25th May 1922 | Box 49 \ 4 Scan148 | |
| Modifications to the 'B' steering Goshawk and seating comfort compared to the 'B' type 40/50. | 30th May 1922 | Box 49 \ 4 Scan149 | |
| Weight of the 40/50 HP front axle assembly and tyres. | 30th May 1922 | Box 49 \ 4 Scan150 | |
| Faults with a 7-Goshawk-11 car in France, detailing issues with creaking wheels, oil on brakes, and loose steering bolts. | 30th Jun 1922 | Box 49 \ 4 Scan151 | |
| Instructing Stores to despatch experimental Goshawk parts to Mr. Royce without charge. | 30th Jun 1922 | Box 49 \ 4 Scan152 | |
| Internal memorandum discussing driver seating accommodation, control placement and design issues for the Goshawk model. | 4th Jul 1922 | Box 49 \ 4 Scan153 | |
| Continued memorandum discussing temporary alterations made to a car and corrections that should have been completed at Derby. | 7th Jul 1922 | Box 49 \ 4 Scan154 | |
| Driver's pedal arrangement and seating accommodation for the Goshawk model. | 7th Jul 1922 | Box 49 \ 4 Scan155 | |
| Experiment to fit radius rods to the front axle of a 40/50 or Goshawk model to cure road shocks. | 2nd Jul 1922 | Box 49 \ 4 Scan156 | |
| Potential improvements to the steering of the Goshawk model. | 1st Jul 1922 | Box 49 \ 4 Scan157 | |
| Required modification to the side steering tube for a 40/50 radius experiment on the front axle. | 25th Jul 1922 | Box 49 \ 4 Scan158 | |
| Temporary experimental application of radius rods to the Goshawk steering system. | 27th Jul 1922 | Box 49 \ 4 Scan159 | |
| Alterations to the Goshawk II production front axle blueprint F.50856. | 28th Jul 1922 | Box 49 \ 4 Scan160 | |
| Requesting a car swap and providing feedback on the Goshawk's engine performance and steering modifications. | 10th Aug 1922 | Box 49 \ 4 Scan161 | |
| Different steering system combinations to avoid steering wobble. | 10th Aug 1922 | Box 49 \ 4 Scan162 | |
| Continued list of recommendations concerning steering geometry, friction, and suspension for production Goshawks. | 2nd Aug 1922 | Box 49 \ 4 Scan163 | |
| Application of a radius rod to the 40/50 model to improve steering performance. | 2nd Aug 1922 | Box 49 \ 4 Scan164 | |
| Reporting positive results from fitting radius rods to the front axle of a 40/50 chassis. | 1st Aug 1922 | Box 49 \ 4 Scan165 | |
| Request to check and fit new type cross steering tubes to two experimental cars, chassis 7-CA and 49-GB. | 1st Aug 1922 | Box 49 \ 4 Scan166 | |
| Letter providing feedback on a sample leather gaiter for the Goshawk 11 cross steering system. | 30th Aug 1922 | Box 49 \ 4 Scan167 | |
| Letter regarding the return of a sample for required improvements. | 30th Aug 1922 | Box 49 \ 4 Scan168 | |
| Mr. Royce's opinion on solving steering troubles for the Goshawk 11 front axle. | 9th Sep 1922 | Box 49 \ 4 Scan169 | |
| Design options for the Goshawk 11 front axle, including pivot length and the type of adjusting screw. | 16th Nov 1922 | Box 49 \ 4 Scan170 | |
| Technical query about eliminating steering wobble by using radius rods, inflexible steering connections, and specific pivot configurations. | 20th Dec 1922 | Box 49 \ 4 Scan171 | |
| Alterations to steering mechanisms, rejecting 'Jacob's gear', and proposing solutions for geometry errors. | 29th Jan 1923 | Box 49 \ 4 Scan172 | |
| The steering performance of the Goshawk 11 fitted with radius rods and recommendations for design standardization. | 30th Jan 1923 | Box 49 \ 4 Scan173 | |
| Agreement to apply radius rods to the Goshawk front axle to correct a steering geometry error. | 3rd Feb 1923 | Box 49 \ 4 Scan174 | |
| Special short screw for the Goshawk Cross Steering Tube to accommodate the fitting of wheel discs. | 28th Feb 1923 | Box 49 \ 4 Scan175 | |
| Completed standardisation sheet for an experiment on an adjusting screw for cross steering rod ball joints. | 12th Mar 1923 | Box 49 \ 4 Scan176 | |
| Standardisation of an adjusting screw for the cross steering rod ball joints. | 28th Feb 1923 | Box 49 \ 4 Scan177 | |
| The costs and standardisation of an adjusting screw for a cross steering rod ball joint. | 3rd Mar 1923 | Box 49 \ 4 Scan178 | |
| Modifications to the Goshawk model's front axle, radius rods, and steering components. | 14th Mar 1923 | Box 49 \ 4 Scan179 | |
| Scheme N.sch.1387 for Goshawk 11 radius rods, noting modifications from the Stork N.sch.1336 design. | 20th Mar 1923 | Box 49 \ 4 Scan180 | |
| Modifications to the Goshawk 11 front radius rod and spring system. | 3rd Mar 1923 | Box 49 \ 4 Scan181 | |
| N.scheme 1394 for the 20 HP model, concerning stiffer springs for the front axle radius rods and side steering tube. | 27th Mar 1923 | Box 49 \ 4 Scan182 | |
| Modifications to the Goshawk II front axle radius rods and steering geometry. | 28th Mar 1923 | Box 49 \ 4 Scan183 | |
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