| Description | Date | Identifier | |
| Comparison of springing peculiarities between the 20 HP and 40/50 HP models. | 22th Jan 1926 | Box 67a \ 1 scan0065 | |
| Spare wheel weights, weight distribution, and front spring modifications for specific models and export markets. | 22th Jan 1926 | Box 67a \ 1 scan0066 | |
| Calculation sheet for spring loads on a 7-EX Phantom car scheduled for running in France. | 1st Jan 1926 | Box 67a \ 1 scan0067 | |
| Comparison of rear spring deflection and buffer clearance between the 20 HP and 40/50 HP models. | 1st Jan 1926 | Box 67a \ 1 scan0068 | |
| Springing specifications and load calculations for the New Phantom and 20 HP models. | 25th Jan 1926 | Box 67a \ 1 scan0069 | |
| Seeking confirmation on rear spring specifications for an experimental Phantom car. | 22th Jan 1926 | Box 67a \ 1 scan0070 | |
| Comparing the suspension characteristics of the New Phantom and 20 HP R-R with the 20 HP Lanchester. | 27th Jan 1926 | Box 67a \ 1 scan0071 | |
| Technical comparison of suspension characteristics between the New Phantom and the 20 HP R-R models. | 1st Feb 1926 | Box 67a \ 1 scan0072 | |
| The performance of rear springing and tyres on the 7-EX car, with suggestions for improvements using semi-balloon tyres and hydraulic shock dampers. | 1st Feb 1926 | Box 67a \ 1 scan0073 | |
| Broken rear road springs on the 8-EX car following endurance testing. | 11th Feb 1926 | Box 67a \ 1 scan0074 | |
| Requesting the poundage of springs for Mr. G.R.N. Minchin's car and the London Trials cars. | 18th Feb 1926 | Box 67a \ 1 scan0075 | |
| Correspondence between the UK and US offices regarding contradictory test results on Phantom springing and requesting instrument details. | 23th Feb 1926 | Box 67a \ 1 scan0076 | |
| Suspension characteristics, road shocks, and springing complaints on various car models. | 24th Feb 1926 | Box 67a \ 1 scan0077 | |
| Springing arrangements for the New Phantom chassis. | 24th Feb 1926 | Box 67a \ 1 scan0078 | |
| Rear spring breakages and suspension damping characteristics, referencing specific models and a complaint from Mr. Rudyard Kipling. | 24th Feb 1926 | Box 67a \ 1 scan0079 | |
| Improvements to the Phantom's suspension, focusing on springs, shock absorbers, and tyre pressure. | 25th Feb 1926 | Box 67a \ 1 scan0080 | |
| Technical memo comparing vehicle ride quality, noise, and performance, referencing the Silver Ghost and New Phantom models. | 2nd Feb 1926 | Box 67a \ 1 scan0081 | |
| The testing of special Woodhead front road springs with four rebound leaves. | 2nd Feb 1926 | Box 67a \ 1 scan0082 | |
| Outlining the principles for calculating vehicle springing based on specified body, passenger, and luggage weights. | 3rd Mar 1926 | Box 67a \ 1 scan0083 | |
| Tyre pressures, a chassis complaint, and coordination with the Dunlop Company on wheel and tyre types. | 3rd Mar 1926 | Box 67a \ 1 scan0084 | |
| Complaints about the 'New Phantom' suspension and the examination of a 'Silver Ghost' car for comparison. | 4th Mar 1926 | Box 67a \ 1 scan0085 | |
| The inspection of springing on chassis 4-YG and an urgent request for its return. | 4th Mar 1926 | Box 67a \ 1 scan0086 | |
| The poundage of rear springs for the Phantom car and confirming a new springing method on specific models. | 5th Mar 1926 | Box 67a \ 1 scan0087 | |
| Poundage of rear springs for 'Phantom' models based on body and load weight. | 5th Mar 1926 | Box 67a \ 1 scan0088 | |
| Request for particulars of the springs fitted to the London demonstration car 4-YG, which has been sent for testing. | 8th Mar 1926 | Box 67a \ 1 scan0089 | |
| Letter concerning the investigation of the unusually good suspension on chassis 4-YG, which is for sale. | 8th Mar 1926 | Box 67a \ 1 scan0090 | |
| Tests conducted on Phantom springing, detailing how front shock absorber stiffness affects rear seat comfort. | 10th Mar 1926 | Box 67a \ 1 scan0091 | |
| Suspension tests and improvements on the 4-YG car compared to the 40/50 HP model. | 15th Mar 1926 | Box 67a \ 1 scan0092 | |
| Rear springs, shock dampers, and tyres for the Phantom model. | 15th Mar 1926 | Box 67a \ 1 scan0093 | |
| Improvements to vehicle ride quality through adjustments to tyres, suspension, and cushions. | 16th Mar 1926 | Box 67a \ 1 scan0094 | |
| Comparing special Woodhead front road springs with conventional ones, discussing rebound leaves and internal friction. | 16th Mar 1926 | Box 67a \ 1 scan0095 | |
| Complaint about the Phantom's ride comfort and springing compared to the Silver Ghost. | 18th Mar 1926 | Box 67a \ 1 scan0096 | |
| Technical memorandum discussing improvements to vehicle suspension, including shock dampers, tyres, and springs. | 19th Mar 1926 | Box 67a \ 1 scan0097 | |
| Unsatisfactory riding in the rear seats of a Phantom car, detailing test results and potential solutions. | 19th Mar 1926 | Box 67a \ 1 scan0098 | |
| Phantom suspension, comparing balance and spring ratings with the Silver Ghost and 20 HP chassis. | 9th Mar 1926 | Box 67a \ 1 scan0099 | |
| Resuming an investigation into the springing differences between the 20 HP and New Phantom chassis. | 19th Mar 1926 | Box 67a \ 1 scan0100 | |
| List of proposed suspension experiments for various car models. | 20th Mar 1926 | Box 67a \ 1 scan0101 | |
| Springing characteristics and weight disposition on the Phantom model. | 20th Mar 1926 | Box 67a \ 1 scan0102 | |
| Internal memorandum addressing complaints about the springing on the Phantom model. | 22th Mar 1926 | Box 67a \ 1 scan0103 | |
| Results of tyre pressure tests on Phantom and Silver Ghost models in relation to riding complaints. | 24th Mar 1926 | Box 67a \ 1 scan0104 | |
| Tyre and wheel combinations, weighing the benefits of low-pressure tyres for comfort against issues like skidding and wobbles. | 24th Mar 1926 | Box 67a \ 1 scan0105 | |
| Investigation into vehicle jolting, suspension, and different tyre pressures. | 25th May 1926 | Box 67a \ 1 scan0106 | |
| Tyre and suspension choices for the 40/50 and 20 HP models to prevent wheel wobble. | 25th Mar 1926 | Box 67a \ 1 scan0107 | |
| Risks of departing from established procedures, mentioning car wobbles, spring clearance, and low-pressure tyre issues. | 1st Mar 1926 | Box 67a \ 1 scan0108 | |
| Tyres and the impact of road conditions on motor travel near Le Canadel. | 1st Mar 1926 | Box 67a \ 1 scan0109 | |
| Outlining a series of experiments to investigate and resolve Phantom suspension complaints. | 26th Mar 1926 | Box 67a \ 1 scan0110 | |
| Springing demonstration to diagnose a small amplitude vibration issue on the Phantom model. | 26th Mar 1926 | Box 67a \ 1 scan0111 | |
| Test results on vehicle ride comfort, comparing different tyres, shock dampers, and car models. | 27th Mar 1926 | Box 67a \ 1 scan0112 | |
| Suggesting a test to diagnose a vibration complaint on a Phantom suspension. | 27th Mar 1926 | Box 67a \ 1 scan0113 | |
| Car suspension, tyres, and shock dampers to correct misunderstandings from a previous memo. | 31th Mar 1926 | Box 67a \ 1 scan0114 | |
| Vehicle suspension, shock dampers, and tyre performance for the 20 HP and 40/50 models. | 31th Mar 1926 | Box 67a \ 1 scan0115 | |
| Vehicle steering, tyre pressures, and suspension improvements including shock dampers and springs. | 1st Apr 1926 | Box 67a \ 1 scan0116 | |
| Requesting views on a proposal about springing for submission to the Sales Conference. | 1st Apr 1926 | Box 67a \ 1 scan0117 | |
| Proposal for a standard formula for vehicle springing arrangements. | 1st Apr 1926 | Box 67a \ 1 scan0118 | |
| Table listing various car body styles and their passenger seating capacities. | 1st Apr 1926 | Box 67a \ 1 scan0119 | |
| Request to Messrs. Woodhead to manufacture a pair of front springs to a specific experimental specification. | 1st Apr 1926 | Box 67a \ 1 scan0120 | |
| Confirming points for further suspension experiments on the 20 HP, Phantom, and Silver Ghost models. | 1st Apr 1926 | Box 67a \ 1 scan0121 | |
| Technical memorandum discussing issues with the front springing of the Phantom model compared to the Silver Ghost standard. | 11th Apr 1926 | Box 67a \ 1 scan0122 | |
| Continued discussion on vehicle design, focusing on center of gravity, spring damping, and tyre performance. | 13th Apr 1926 | Box 67a \ 1 scan0123 | |
| List of modifications to be carried out on car 44-PK, including fitting a new axle, springs, and shock absorbers. | 13th Apr 1926 | Box 67a \ 1 scan0124 | |
| Suspension test results, comparing the ride quality of a pre 'U' series Silver Ghost with the New Phantom. | 13th Apr 1926 | Box 67a \ 1 scan0125 | |
| Copy of a telegram from R. Lecanadel regarding modifications to the Phantom's springing and brakes. | 13th Apr 1926 | Box 67a \ 1 scan0126 | |
| Technical memorandum discussing the springing, shock dampers, and ride quality of the Phantom model. | 4th Apr 1926 | Box 67a \ 1 scan0127 | |
| Axle control, radius rod fittings, road clearance, and comparing front axle designs with other car manufacturers. | 4th Apr 1926 | Box 67a \ 1 scan0128 | |
| Advantages and disadvantages of potential suspension modifications. | 4th Apr 1926 | Box 67a \ 1 scan0129 | |
| Telegram discussing Phantom suspension settings, including springing percentages, hydraulic dampers and tyres. | 15th Apr 1932 | Box 67a \ 1 scan0130 | |
| Telegram discussing decisions on model testing, including changes to the centre of gravity, axle control, and chassis. | 15th Nov 1916 | Box 67a \ 1 scan0131 | |
| Tests conducted on the Phantom's suspension to investigate complaints of jolting and the effect of spring stiffness. | 15th Apr 1926 | Box 67a \ 1 scan0132 | |
| The effect of fitting front-wheel brakes on the springing of Phantom and Silver Ghost models. | 15th Apr 1926 | Box 67a \ 1 scan0133 | |
| Springing complaints and riding comfort, comparing the Silver Ghost, Phantom, 20 HP, and 40/50 HP models. | 16th Apr 1926 | Box 67a \ 1 scan0134 | |
| The difficulties of evaluating vehicle suspension performance based on physical sensations. | 16th Apr 1926 | Box 67a \ 1 scan0135 | |
| Suspension tests, detailing damping, spring strength, and comparisons between the Phantom, 20 HP, and Lancia models. | 16th Apr 1926 | Box 67a \ 1 scan0136 | |
| Comparison of suspension performance for the Phantom and 20 HP models under specific road test conditions. | 16th Apr 1926 | Box 67a \ 1 scan0137 | |
| Short memo suggesting the circulation of an enclosed document about tyres to avoid confusion. | 16th Apr 1926 | Box 67a \ 1 scan0138 | |
| From Mr. Royce clarifying his position on suspension, tyres, and the standardization of shock dampers for Phantom and 20 HP models. | 29th Mar 1926 | Box 67a \ 1 scan0139 | |
| Tyre pressures, road holding, steering issues, and shock dampers, signed by F.H. Royce. | 16th Apr 1926 | Box 67a \ 1 scan0140 | |
| Transcribing a cable from Mr. Royce regarding New Phantom springing specifications and testing. | 16th Apr 1926 | Box 67a \ 1 scan0141 | |
| Issues and proposed modifications for fitting hydraulic shock dampers to a 7-EX model. | 17th Apr 1926 | Box 67a \ 1 scan0142 | |
| Difficulties encountered during a work task related to component fitting. | 17th Apr 1926 | Box 67a \ 1 scan0143 | |
| Modifications and alternative designs for the Phantom suspension system. | 17th Apr 1926 | Box 67a \ 1 scan0144 | |
| Continuation memo on car oscillation due to road irregularities, with applications to past, present, and future work. | 14th Apr 1926 | Box 67a \ 1 scan0145 | |
| Necessary improvements to the Phantom's suspension springing. | 18th Apr 1926 | Box 67a \ 1 scan0146 | |
| Continued note listing potential causes for an issue, including tyres, shock dampers, and springs. | 20th Apr 1926 | Box 67a \ 1 scan0147 | |
| Springing comfort issues and shock absorber performance on the Phantom model. | 20th Apr 1926 | Box 67a \ 1 scan0148 | |
| Model built to investigate the 'centre of percussion' in the Phantom and 20HP chassis suspensions. | 20th Apr 1926 | Box 67a \ 1 scan0149 | |
| Crude method for comparing car riding qualities by measuring water spillage to test the 40/50 HP suspension. | 20th Apr 1926 | Box 67a \ 1 scan0150 | |
| Effects of suspension components and tyre pressures on vehicle ride quality. | 20th Apr 1926 | Box 67a \ 1 scan0151 | |
| Test report on moving a vehicle's centre of gravity and the resulting effects on suspension and weight distribution. | 20th Apr 1926 | Box 67a \ 1 scan0152 | |
| Test comparing ride quality and passenger displacement between different car models using a water spillage measurement method. | 20th Apr 1926 | Box 67a \ 1 scan0153 | |
| Front spring deflection, riding comfort, and high-speed wobbles. | 20th Apr 1926 | Box 67a \ 1 scan0154 | |
| Procedure for testing the rating of vehicle springs. | 21th Apr 1926 | Box 67a \ 1 scan0155 | |
| Development of accelerometers and seismographs for measuring car suspension and riding qualities. | 21th Apr 1926 | Box 67a \ 1 scan0156 | |
| Telegram regarding checking the relative stiffness of original and present front springs. | 23th Apr 1926 | Box 67a \ 1 scan0157 | |
| Phantom suspension tests, specifically regarding the front springs and their effect on ride quality. | 23th Apr 1926 | Box 67a \ 1 scan0158 | |
| Comparative analysis of vehicle ride quality and suspension tests on various models including the Phantom and Hispano-Suiza. | 23th Apr 1926 | Box 67a \ 1 scan0159 | |
| Comparison of riding comfort between the Phantom, Silver Ghost, and 20 HP models, with analysis of tests on shock dampers and suspension. | 23th Apr 1926 | Box 67a \ 1 scan0160 | |
| Typed memorandum discussing maximum spring movement and its effect on riding comfort. | 23th Apr 1926 | Box 67a \ 1 scan0161 | |
| Chart comparing road test results at 23 M.P.H. for different vehicle configurations. | 23th Apr 1926 | Box 67a \ 1 scan0162 | |
| Shock absorber effectiveness, correlating water loss during tests to observed riding comfort. | 23th Apr 1926 | Box 67a \ 1 scan0163 | |
| Complaints about stiff Phantom rear suspension on U.S. cars compared to Springfield models. | 23th Apr 1926 | Box 67a \ 1 scan0164 | |
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