| Description | Date | Identifier | |
| The rear springing and tyres of the 7-EX car, with recommendations for improvements using semi-balloon tyres and hydraulic shock dampers. | 2nd Feb 1926 | Box 55 \ 3 Scan042 | |
| Tests of hydraulic shock absorbers to prevent high-speed steering wobble. | 1st Feb 1926 | Box 55 \ 3 Scan043 | |
| Tests conducted on hydraulic dampers and tyres to eliminate vehicle wobbles. | 10th Feb 1926 | Box 55 \ 3 Scan044 | |
| Potential design issues and solutions for a hydraulic shock absorber valve. | 10th Feb 1926 | Box 55 \ 3 Scan045 | |
| Air getting trapped in a valve piston and potential remedies. | 2nd Feb 1926 | Box 55 \ 3 Scan046 | |
| Method to eliminate chatter in hydraulic shock absorbers, detailing initial test results and weight. | 2nd Feb 1926 | Box 55 \ 3 Scan047 | |
| Blueprint showing a suggested modification to a hydraulic shock absorber. | 12th Feb 1926 | Box 55 \ 3 Scan048 | |
| Novel patented combinations for hydraulic shock dampers to improve car suspension. | 13th Feb 1926 | Box 55 \ 3 Scan049 | |
| List of features and proposed modifications for double acting shock absorbers. | 2nd Feb 1926 | Box 55 \ 3 Scan050 | |
| Failure of rivets on Hartford shock absorbers on Lord Montagu's car. | 2nd Feb 1926 | Box 55 \ 3 Scan051 | |
| Failure of rivets on Hartford shock absorbers on Lord Montagu's car and potential replacements. | 13th Feb 1926 | Box 55 \ 3 Scan052 | |
| The failure and modification of hydraulic shock absorbers. | 17th Feb 1926 | Box 55 \ 3 Scan053 | |
| Improvements to Phantom car steering and the persistent issue of high-speed wobbles. | 17th Feb 1926 | Box 55 \ 3 Scan054 | |
| High-speed steering wobble, the influence of low-pressure tyres, and planned improvements like hydraulic dampers. | 17th Feb 1926 | Box 55 \ 3 Scan055 | |
| The causes of and solutions for high speed steering wobbles. | 19th Feb 1926 | Box 55 \ 3 Scan056 | |
| Hydraulic shock dampers, their benefits, and considerations for low-pressure tyres. | 19th Feb 1926 | Box 55 \ 3 Scan057 | |
| Tests to determine the minimum loading for hydraulic shock dampers to prevent high-speed steering wobbles. | 20th Feb 1926 | Box 55 \ 3 Scan058 | |
| Modifications to hydraulic shock dampers to address valve chatter and other issues. | 2nd Feb 1926 | Box 55 \ 3 Scan059 | |
| Use of three different tyre sizes in wheel wobble tests and their characteristics. | 2nd Feb 1926 | Box 55 \ 3 Scan060 | |
| The Experimental Department's views on well base tyres, rims, and hydraulic dampers to eliminate wheel wobble on the Phantom. | 1st Feb 1926 | Box 55 \ 3 Scan061 | |
| Proposal to send a pair of hydraulic shock absorbers to be fitted to the 7-EX experimental car. | 1st Feb 1926 | Box 55 \ 3 Scan062 | |
| The testing of hydraulic shock absorbers, noting a lever fracture and subsequent modifications. | 24th Feb 1926 | Box 55 \ 3 Scan063 | |
| Failure and improvement of a hydraulic shock damper, including settings for different axles and a debate on terminology. | 25th Feb 1926 | Box 55 \ 3 Scan064 | |
| Phantom's suspension, noting it rides worse than the Silver Ghost and proposing solutions involving springs, shock dampers, and tyre pressure. | 25th Feb 1926 | Box 55 \ 3 Scan065 | |
| Report comparing the performance of the New Phantom and Silver Ghost models, focusing on ride quality, noise, and speed. | 25th Feb 1926 | Box 55 \ 3 Scan066 | |
| Hydraulic shock absorbers, detailing concerns about significant oil leakage from the lever shaft gland. | 25th Feb 1926 | Box 55 \ 3 Scan067 | |
| The use of ordinary engine oil in shock absorbers following unsuccessful tests with packings and pressings. | 26th Feb 1926 | Box 55 \ 3 Scan068 | |
| The effectiveness of hydraulic shock dampers in reducing high-speed steering wobble and their implementation for testing. | 26th Feb 1926 | Box 55 \ 3 Scan069 | |
| Requesting modification to the shock damper mounting due to a new valve design. | 27th Feb 1926 | Box 55 \ 3 Scan070 | |
| Pressing for the adoption of hydraulic shock dampers, semi-balloon tyres, and a lighter front axle for Phantom & Goshawk cars. | 27th Feb 1926 | Box 55 \ 3 Scan071 | |
| Oil leakage from shock dampers and potential solutions. | 27th Feb 1926 | Box 55 \ 3 Scan072 | |
| Telegram suggesting modifications for dampers, including a breather, different pistons, or a cavity with a return between the bearing and gland. | 1st Mar 1926 | Box 55 \ 3 Scan073 | |
| Oil leakage issues and experiments on hydraulic shock absorbers. | 1st Mar 1926 | Box 55 \ 3 Scan074 | |
| Hydraulic shock dampers, including analysis of a broken link, comparison with Lanchester's patent, and suggestions for design improvements. | 3rd Mar 1926 | Box 55 \ 3 Scan075 | |
| Continued page discussing improvements proven on the 20 HP model for steady riding with balloon tyres. | 2nd Mar 1926 | Box 55 \ 3 Scan076 | |
| Suggestions to overcome oil escaping from hydraulic shock dampers. | 2nd Mar 1926 | Box 55 \ 3 Scan077 | |
| Design improvements and considerations for hydraulic shock dampers. | 2nd Mar 1926 | Box 55 \ 3 Scan078 | |
| Large gauze disc for filling to avoid using a smaller, easily lost filter. | 2nd Mar 1926 | Box 55 \ 3 Scan079 | |
| Fitting of shock dampers, proposals for a 40/50 back axle, and a suggested test run. | 2nd Mar 1926 | Box 55 \ 3 Scan080 | |
| Benefits of hydraulic shock absorbers, their effect on springing, steering, and wheel wobble. | 3rd Mar 1926 | Box 55 \ 3 Scan081 | |
| Report discussing the effects of front-wheel brakes and hydraulic shock absorbers on steering wobble and road shocks. | 3rd Mar 1926 | Box 55 \ 3 Scan082 | |
| Road test of hydraulic shock dampers to determine the amount of oil passing through the gland. | 3rd Mar 1926 | Box 55 \ 3 Scan083 | |
| Troubleshooting efforts for oil leaks and performance issues in a damper system. | 4th Mar 1926 | Box 55 \ 3 Scan084 | |
| Suggestions for improving hydraulic shock dampers to reduce oil leakage through the rocker shaft. | 4th Mar 1926 | Box 55 \ 3 Scan085 | |
| Temporary modifications to hydraulic shock absorbers for a car heading to Le Canadel. | 4th Mar 1926 | Box 55 \ 3 Scan086 | |
| Proposing a test rig for hydraulic shock dampers to compare gland packing efficiency. | 4th Mar 1926 | Box 55 \ 3 Scan087 | |
| Design sketch with annotations for a spring-loaded gland for a hydraulic damper. | 5th Mar 1926 | Box 55 \ 3 Scan088 | |
| Hydraulic shock-absorbers and their effect on steering-wheel shock and wobble when using lower pressure tyres. | 5th Mar 1926 | Box 55 \ 3 Scan089 | |
| Technical memorandum discussing oil loss in hydraulic shock dampers, with proposed solutions and design modifications. | 5th Mar 1926 | Box 55 \ 3 Scan090 | |
| Piston fit, discharge vents, and potential design modifications compared to Houdaille. | 6th Mar 1926 | Box 55 \ 3 Scan091 | |
| Hydraulic shock dampers, addressing 'chattering' and oil leakage issues. | 6th Mar 1926 | Box 55 \ 3 Scan092 | |
| Test of oil thermal expansion, explaining why shock absorbers leaked during testing. | 6th Mar 1926 | Box 55 \ 3 Scan093 | |
| Shock damper working temperatures, oil expansion, and gland leakage, leading to the proposal of gland efficiency tests. | 6th Mar 1926 | Box 55 \ 3 Scan094 | |
| Analysis of oil leakage from a shaft gland, comparing a standard felt-packed gland with a spring-loaded version. | 6th Mar 1926 | Box 55 \ 3 Scan095 | |
| Road tests for a spring-loaded gland and asbestos packing. | 8th Mar 1926 | Box 55 \ 3 Scan096 | |
| New asbestos and graphite packing material for shock dampers, which proved superior to felt under testing. | 8th Mar 1926 | Box 55 \ 3 Scan097 | |
| Requesting to fit a pair of tested hydraulic shock dampers to vehicle 4-YG. | 9th Mar 1926 | Box 55 \ 3 Scan098 | |
| Implications of fitting hydraulic shock absorbers, particularly in relation to steering. | 10th Mar 1926 | Box 55 \ 3 Scan099 | |
| Modifications and testing procedures for hydraulic shock dampers. | 10th Mar 1926 | Box 55 \ 3 Scan100 | |
| Querying the provision of springs to adjust loading specifications. | 11th Mar 1926 | Box 55 \ 3 Scan101 | |
| Development and production strategy for hydraulic shock dampers, referencing different design schemes. | 11th Mar 1926 | Box 55 \ 3 Scan102 | |
| Pushing forward with an experimental scheme for new dampers pending formal sign-off. | 11th Mar 1925 | Box 55 \ 3 Scan103 | |
| Experimental modifications to hydraulic shock dampers. | 1st Mar 1926 | Box 55 \ 3 Scan104 | |
| Design improvements and issues for hydraulic shock dampers. | 12th Mar 1926 | Box 55 \ 3 Scan105 | |
| The effects of hydraulic shock dampers on riding comfort and steering, specifically addressing high-speed wobble. | 12th Mar 1926 | Box 55 \ 3 Scan106 | |
| Continuation page of a document discussing continental roads and speed conditions. | 13th Mar 1926 | Box 55 \ 3 Scan107 | |
| Outlining required tests and experiments for hydraulic shock dampers. | 13th Mar 1926 | Box 55 \ 3 Scan108 | |
| Standardization of oil hydraulic shock dampers and the related supply of wheels from the Dunlop Company. | 15th Mar 1926 | Box 55 \ 3 Scan109 | |
| Pause in development for the hydraulic shock absorber, N.Scheme 2159. | 17th Mar 1926 | Box 55 \ 3 Scan110 | |
| Design improvements for hydraulic shock dampers, specifically the filter and gland. | 19th Mar 1926 | Box 55 \ 3 Scan111 | |
| On unsatisfactory ride quality in the rear seats of a Phantom car and potential solutions. | 19th Mar 1926 | Box 55 \ 3 Scan112 | |
| Modifications to hydraulic shock dampers, including valve, filter, and gland changes. | 20th Mar 1926 | Box 55 \ 3 Scan113 | |
| Alterations for hydraulic shock dampers on the rear of a Phantom chassis. | 20th Mar 1926 | Box 55 \ 3 Scan114 | |
| Letter from Rolls-Royce of America discussing trials of hydraulic shock absorbers, including details on glands, oil, and steering performance. | 28th Mar 1926 | Box 55 \ 3 Scan115 | |
| Letter discussing steering and suspension issues, focusing on the gyroscopic action of front wheels and comparing different shock absorbers. | 23th Mar 1926 | Box 55 \ 3 Scan116 | |
| Modifications to a hydraulic shock damper design based on external suggestions. | 26th Mar 1926 | Box 55 \ 3 Scan117 | |
| List of nine modifications for a hydraulic shock damper design to go into production. | 29th Mar 1926 | Box 55 \ 3 Scan118 | |
| New shock absorber design, proposing to replace the current pattern with it. | 29th Mar 1926 | Box 55 \ 3 Scan119 | |
| Issues with suspension, tyres, and shock dampers, with suggestions for improvement. | 31th Mar 1926 | Box 55 \ 3 Scan120 | |
| Suspension, shock dampers, tyre pressures, and handling characteristics of various car models. | 31th Mar 1926 | Box 55 \ 3 Scan121 | |
| Steering, suspension, and tyre performance issues. | 1st Apr 1926 | Box 55 \ 3 Scan122 | |
| Fitting of hydraulic shock dampers from a 40/50 model to a 20 HP chassis. | 1st Apr 1926 | Box 55 \ 3 Scan123 | |
| High-speed steering wobbles on car 7-EX with medium pressure tyres. | 1st Apr 1926 | Box 55 \ 3 Scan124 | |
| Positioning and specifications for hydraulic shock dampers on a Phantom rear axle. | 4th Apr 1926 | Box 55 \ 3 Scan125 | |
| Outlining further suspension experiments on the 20 HP, Phantom, and Silver Ghost models. | 10th Apr 1926 | Box 55 \ 3 Scan126 | |
| Issues with the front springing on the Phantom model compared to the Silver Ghost standard. | 11th Apr 1926 | Box 55 \ 3 Scan127 | |
| Car centre of gravity and the damping differences between spring and tyre deflection. | 13th Apr 1926 | Box 55 \ 3 Scan128 | |
| Copy of a telegram with instructions on modifying a Phantom's suspension and brakes. | 13th Apr 1926 | Box 55 \ 3 Scan129 | |
| Suspension and springing setup for the Phantom model. | 14th Apr 1926 | Box 55 \ 3 Scan130 | |
| Axle design, road clearance, and suspension components, with a comparison to competitor vehicles. | 16th Apr 1926 | Box 55 \ 3 Scan131 | |
| Difficulties of measuring and comparing vehicle suspension performance, particularly distinguishing it from coachwork characteristics. | 16th Apr 1926 | Box 55 \ 3 Scan132 | |
| Suspension tests, comparing damping, spring strength, and different vehicle models like the Phantom and Lancia. | 16th Apr 1926 | Box 55 \ 3 Scan133 | |
| Report comparing ride quality for Phantom and 20 HP models with different shock damper and spring setups on a wavy road. | 17th Apr 1926 | Box 55 \ 3 Scan134 | |
| Difficulties and potential solutions for fitting hydraulic shock dampers to the 7-EX model. | 17th Apr 1926 | Box 55 \ 3 Scan135 | |
| The difficulty met with front bolts and a radiator-engine support fitting. | 18th Apr 1926 | Box 55 \ 3 Scan136 | |
| Improvements and required actions for the Phantom's springing and suspension system. | 18th Apr 1926 | Box 55 \ 3 Scan137 | |
| Continued note on potential causes for poor vehicle ride quality, identifying tyres, dampers, and springs. | 19th Apr 1926 | Box 55 \ 3 Scan138 | |
| Quoting a telegram regarding necessary design changes for shock dampers. | 19th Apr 1926 | Box 55 \ 3 Scan139 | |
| The difficulty of fitting hydraulic shock dampers due to the presence of R-R wing stays. | 20th Apr 1926 | Box 55 \ 3 Scan140 | |
| Crude method for comparing vehicle suspension riding qualities using water spillage. | 20th Apr 1926 | Box 55 \ 3 Scan141 | |
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