| Description | Date | Identifier | |
| Proposals for stiffening an existing New Phantom steering column. | 15th May 1926 | Box 67 \ 4 scan0079 | |
| Telephone message from R. regarding steering and axle modifications for Phantom models. | 17th May 1926 | Box 67 \ 4 scan0080 | |
| Modification to the 'New Phantom' steering top pivot bush, its benefits, and considerations for retrofitting existing chassis. | 17th May 1926 | Box 67 \ 4 scan0081 | |
| Steering and axle improvements for Phantom models, including worm gears and shock absorbers. | 17th May 1926 | Box 67 \ 4 scan0082 | |
| Potential modifications to the 7-EX car to resolve steering wobble and vibration issues. | 5th May 1926 | Box 67 \ 4 scan0083 | |
| Modifications to the Phantom chassis, including steering, ignition, and piston design. | 18th May 1926 | Box 67 \ 4 scan0084 | |
| Design, advantages, and weaknesses of three different experimental pistons. | 18th May 1926 | Box 67 \ 4 scan0085 | |
| Modifications and preparation for a 40/50 HP Phantom chassis and a 12-EX car. | 19th May 1926 | Box 67 \ 4 scan0086 | |
| Steering tests in France to reduce shocks and wobbles using weaker springs and hydraulic dampers. | 19th May 1926 | Box 67 \ 4 scan0087 | |
| Steering tube springs, low-speed wobbles, and friction in pivots for the Phantom and Silver Ghost chassis. | 17th May 1926 | Box 67 \ 4 scan0088 | |
| Steering complaints and test results for a Phantom model in France. | 17th May 1926 | Box 67 \ 4 scan0089 | |
| Testing and comparison of Sunbeam and Panhard steering against the company's own steering systems. | 19th May 1926 | Box 67 \ 4 scan0090 | |
| Analysis of high-speed steering control issues, attributing the problem to suspension flexibility. | 19th May 1926 | Box 67 \ 4 scan0091 | |
| Suspension tests comparing a Hispano to an R-R car, focusing on high-speed stability and spring ratings. | 27th Apr 1926 | Box 67 \ 4 scan0092 | |
| The steering of a 3-Litre Sunbeam car, comparing it to the Phantom chassis and analysing the effect of front axle weight. | 27th Apr 1926 | Box 67 \ 4 scan0093 | |
| Historical faults with the Phantom steering system, including road shocks and high-speed wobbles. | 20th May 1926 | Box 67 \ 4 scan0094 | |
| Car faults from tester complaints and proposing an inter-departmental agreement to address the '6 worst features'. | 3rd Mar 1925 | Box 67 \ 4 scan0095 | |
| Steering criticisms of the 44-PK model compared to the 40/50 and 20-RR cars. | 3rd Mar 1925 | Box 67 \ 4 scan0096 | |
| Technical memo discussing steering faults and potential remedies on the EAC 'V' Series car. | 1st May 1925 | Box 67 \ 4 scan0097 | |
| Issues with the steering gear, including customer complaints and an incident involving a New Phantom. | 11th Jun 1925 | Box 67 \ 4 scan0098 | |
| Continued memorandum urging for a technical problem not to be shelved and assigned to a draughtsman. | 28th Aug 1925 | Box 67 \ 4 scan0099 | |
| Copy of a telegram from Mr. Royce to Claude Johnson regarding steering improvements for the New Phantom and Goshawk models. | 28th Aug 1925 | Box 67 \ 4 scan0100 | |
| Daily report on experimental car 93-NK, the first 'V' series chassis, detailing steering and road shock issues. | 24th Apr 1926 | Box 67 \ 4 scan0101 | |
| Careful communication strategy for a steering alteration on customer cars. | 1st May 1926 | Box 67 \ 4 scan0102 | |
| Experimental information regarding Phantom steering, shocks, and performance on French roads. | 20th May 1926 | Box 67 \ 4 scan0103 | |
| Progress report on component testing for steering, dampers, and tyres on Phantom and 20 HP models. | 21th May 1926 | Box 67 \ 4 scan0104 | |
| Several new steering system components and requesting oversight of the associated tests. | 21th May 1926 | Box 67 \ 4 scan0105 | |
| Steering tests and comparisons with a Lincoln and Panhard to address a wandering defect in company cars. | 21th May 1926 | Box 67 \ 4 scan0106 | |
| Proposed modifications and costs for the Phantom steering system. | 21th May 1926 | Box 67 \ 4 scan0107 | |
| Responding to an inquiry about Phantom steering issues, costs, and potential solutions. | 21th May 1926 | Box 67 \ 4 scan0108 | |
| Confirming arrangements for testing a car fitted with hydraulic dampers and steering modifications in France. | 26th May 1926 | Box 67 \ 4 scan0109 | |
| Phantom Steering, discussing chassis faults found during strenuous testing and proposing a collaborative approach to identify and prioritize the most serious issues. | 26th May 1926 | Box 67 \ 4 scan0110 | |
| Test report on a 40/50 HP chassis regarding stiff steering and the performance of weaker buffer springs. | 28th May 1926 | Box 67 \ 4 scan0111 | |
| Test results and recommendations for Phantom model tyres and steering improvements. | 29th May 1926 | Box 67 \ 4 scan0112 | |
| The production and modification of steering components for the Phantom model. | 1st Jun 1926 | Box 67 \ 4 scan0113 | |
| Steering complaints on the Phantom model and the costs of proposed modifications to the steering worm. | 1st Jun 1926 | Box 67 \ 4 scan0114 | |
| Internal memorandum regarding the cost and customer communication strategy for a steering issue on 35 unshipped cars. | 1st Jun 1926 | Box 67 \ 4 scan0115 | |
| Comparative tests on steering, suspension, and tyres between experimental cars 10-EX and 7-LC. | 4th Jun 1926 | Box 67 \ 4 scan0116 | |
| Plans for vehicle testing, focusing on body types, steering, and suspension modifications. | 4th Jun 1926 | Box 67 \ 4 scan0117 | |
| Plans for road testing cars in France, focusing on hydraulic shock absorbers, medium-pressure tyres, and eliminating front-wheel wobble. | 6th Jun 1926 | Box 67 \ 4 scan0118 | |
| Origin of complaints about high-speed steering performance on Phantom cars. | 6th Jun 1926 | Box 67 \ 4 scan0119 | |
| Customer complaints, vehicle testing in France, and changes to steering systems. | 4th Jun 1926 | Box 67 \ 4 scan0120 | |
| Standardisation proposal for a steering column support stay to reduce movement. | 4th Jun 1926 | Box 67 \ 4 scan0121 | |
| Standardisation of a steering worm and nut with .940' lead to improve existing steering. | 4th Jun 1926 | Box 67 \ 4 scan0122 | |
| Advisory note on the correct re-assembly of steering systems to avoid post-dismantling stiffness. | 23th Jun 1926 | Box 67 \ 4 scan0123 | |
| Cover note attaching a copy of a document and requesting remarks. | 23th Jun 1926 | Box 67 \ 4 scan0124 | |
| Solutions for customer complaints about steering vibrations. | 23th Jun 1926 | Box 67 \ 4 scan0125 | |
| Scheme to address steering complaints by fitting weaker springs. | 28th Jun 1926 | Box 67 \ 4 scan0126 | |
| Requesting feedback from the Paris office on the experience of using weaker springs in the side steering tube to reduce shocks. | 5th Jul 1926 | Box 67 \ 4 scan0127 | |
| Phantom steering, feedback on weaker side steering tube springs, and the rationale for extensive testing by the Experimental Department. | 7th Jul 1926 | Box 67 \ 4 scan0128 | |
| Standardisation of steering spring strengths based on tests conducted in France. | 2nd Jul 1926 | Box 67 \ 4 scan0129 | |
| Experiments on side steering tube springs and standardising improvements from the Sales department. | 30th Apr 1926 | Box 67 \ 4 scan0130 | |
| Suggesting modifications to the Phantom steering system to improve joggles and road shocks experienced on continental roads. | 27th Apr 1926 | Box 67 \ 4 scan0131 | |
| Testing of weaker side steering tube springs for the Phantom model. | 30th Apr 1926 | Box 67 \ 4 scan0132 | |
| Tests and fitting precautions for Phantom side steering tube springs. | 7th Jul 1926 | Box 67 \ 4 scan0133 | |
| Spring load calculations and fitting instructions with an accompanying blueprint. | 7th Jul 1926 | Box 67 \ 4 scan0134 | |
| Manufacturing tolerances and performance variations in steering tube springs. | 7th Jul 1926 | Box 67 \ 4 scan0135 | |
| Optimal spring strength for steering shocks and related design considerations. | 7th Jul 1926 | Box 67 \ 4 scan0136 | |
| Recommendation to use lead bronze bushes and stainless steel to prevent parts from seizing and rusting while at the coachbuilders. | 7th Jul 1926 | Box 67 \ 4 scan0137 | |
| Inquiry about identification marks and specifications for three types of New Phantom steering systems. | 8th Jul 1926 | Box 67 \ 4 scan0138 | |
| Phantom Steering, clarifying a misunderstanding about testing non-standard springs and the process for coordinating modifications. | 1st Jul 1926 | Box 67 \ 4 scan0139 | |
| From 'BJ' discussing the coordination between Works and Sales for testing different car bodies and spring strengths. | 1st Jul 1926 | Box 67 \ 4 scan0140 | |
| Modifications to the New Phantom steering system and the information to be circularised to depots. | 9th Jul 1926 | Box 67 \ 4 scan0141 | |
| Modifications for the New Phantom steering and the need to circulate information to the depots. | 9th Jul 1926 | Box 67 \ 4 scan0142 | |
| Differences between various Phantom steering box worm gears. | 10th Jul 1926 | Box 67 \ 4 scan0143 | |
| Test report on the 'Blue Car' (10-EX), detailing its steering, riding qualities, and recommendations for improvements. | 1st Jul 1926 | Box 67 \ 4 scan0144 | |
| Brief memo acknowledging clarification regarding the identification of Phantom steering types. | 13th Jul 1926 | Box 67 \ 4 scan0145 | |
| New steering specifications, comparing different lead measurements and spring ratings. | 1st Jul 1926 | Box 67 \ 4 scan0146 | |
| Continued memorandum discussing a new steering scheme described by an inventor. | 28th Jun 1926 | Box 67 \ 4 scan0147 | |
| Standardization and testing of different spring and steering configurations for the Phantom model. | 17th Jul 1926 | Box 67 \ 4 scan0148 | |
| Arranging the time and place for a test on .940 steering. | 24th Jul 1926 | Box 67 \ 4 scan0149 | |
| Test report on a modified steering system for the New Phantom model with a .940 worm and 1500lbs S.S. tube spring. | 4th Aug 1926 | Box 67 \ 4 scan0150 | |
| Modifications to the Phantom's side steering tube springs to reduce road shock. | 7th Aug 1926 | Box 67 \ 4 scan0151 | |
| Urgently requesting details for various steering, aero, and oil relay components. | 9th Aug 1926 | Box 67 \ 4 scan0152 | |
| Proposals for modifications to the New Phantom steering system, specifically for cars going abroad. | 12th Aug 1926 | Box 67 \ 4 scan0153 | |
| Test comparing two wheel types and their effect on out-of-centre point steering. | 18th Aug 1926 | Box 67 \ 4 scan0154 | |
| Scheme to add friction to the Phantom steering system to reduce wobbles and irritating movement. | 21th Aug 1926 | Box 67 \ 4 scan0155 | |
| Alteration of Phantom steering tube springs due to customer complaints. | 1st Aug 1926 | Box 67 \ 4 scan0156 | |
| Technical memo outlining two solutions for customer complaints regarding Phantom steering. | 24th Aug 1926 | Box 67 \ 4 scan0157 | |
| Sending a covered Phantom car to London to test a new lightened axle and hydraulic dampers, and to fix running issues. | 25th Aug 1926 | Box 67 \ 4 scan0158 | |
| From 'Da' to 'Hs' regarding Mr. Royce's disapproval of a Phantom Steering scheme and a new job on spring design. | 26th Aug 1926 | Box 67 \ 4 scan0159 | |
| The distribution of information on New Phantom steering modifications to the Depots. | 27th Aug 1926 | Box 67 \ 4 scan0160 | |
| Results of various steering modification tests and concluding that slow steering is necessary for safety. | 27th Aug 1926 | Box 67 \ 4 scan0161 | |
| Testing of a lightened axle, hydraulic dampers, and a pressure cooling system on the 8-EX car, and requesting sketches of the 10-EX car. | 26th Aug 1926 | Box 67 \ 4 scan0162 | |
| Procedures for addressing steering complaints on the New Phantom model. | 28th Aug 1926 | Box 67 \ 4 scan0163 | |
| Steering characteristics, the desire for quick steering, and the impact of lower pressure tyres in relation to competitor vehicles. | 1st Sep 1926 | Box 67 \ 4 scan0164 | |
| Revised side steering tube springs, addressing overstressing by providing a double rating and more movement. | 9th Sep 1926 | Box 67 \ 4 scan0165 | |
| Recommending the adoption of low-pressure tyres for Phantom & Goshawk chassis, detailing the advantages and disadvantages. | 3rd Sep 1926 | Box 67 \ 4 scan0166 | |
| Modifications for steering systems to accommodate low-pressure tyres, and addressing steering complaints on Phantom and Goshawk cars. | 9th Sep 1926 | Box 67 \ 4 scan0167 | |
| Trialing a new slower pitch worm for the Phantom steering system to address customer complaints. | 9th Sep 1926 | Box 67 \ 4 scan0168 | |
| Letter from Maurice Olley to E. W. Hives acknowledging a memo and blueprint concerning Phantom steering and the lightened type axle. | 13th Sep 1926 | Box 67 \ 4 scan0169 | |
| Instruction to design hydraulic dampers for steering with an adjustable spring-loaded by-pass valve. | 22th Sep 1926 | Box 67 \ 4 scan0170 | |
| Adjustable steering friction for the Phantom model, including issues on the 12-EX and proposing spring-loaded friction. | 23th Sep 1926 | Box 67 \ 4 scan0171 | |
| Querying why certain cars with well base rims are being produced without the mandated hydraulic shock dampers, new steering friction device, and lower geared steering. | 25th Sep 1926 | Box 67 \ 4 scan0172 | |
| Steering wobble issues with 0.94' steering, referencing trials and a specific customer complaint. | 27th Sep 1926 | Box 67 \ 4 scan0173 | |
| Over-stressed side steering tube springs and potential solutions. | 27th Sep 1926 | Box 67 \ 4 scan0174 | |
| Policy on steering modifications and the use of medium and low pressure tyres on the 20 HP and Phantom chassis. | 28th Sep 1926 | Box 67 \ 4 scan0175 | |
| Hm to Hs requesting information regarding a steering issue. | 29th Sep 1926 | Box 67 \ 4 scan0176 | |
| Recommending the circularisation of information about the New Phantom steering characteristics. | 29th Sep 1926 | Box 67 \ 4 scan0177 | |
| Issues with .940 steering, comparing it to other worm gears and addressing high-speed wobbles. | 30th Sep 1926 | Box 67 \ 4 scan0178 | |
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