| Description | Date | Identifier | |
| Test drive impression of a 'Phantom' with modified springs and shock absorbers. | 17th Aug 1928 | Box 67a \ 2 scan0156 | |
| Springing, discussing low speed riding trouble and shock absorber loading tests. | 20th Aug 1928 | Box 67a \ 2 scan0157 | |
| Gathering further impressions on the springing of a Sedanca, with and without special hydraulic damper springs. | 21th Aug 1928 | Box 67a \ 2 scan0158 | |
| New design for 40/50 rear road springs and its effect on stock levels. | 1st Aug 1928 | Box 67a \ 2 scan0159 | |
| Revised pad for the 40/50 rear road springs to enable the use of current stock. | 24th Aug 1928 | Box 67a \ 2 scan0160 | |
| Polishing and cadmium plating of existing springs on the Trials Sedanca car 81.RF. | 27th Aug 1928 | Box 67a \ 2 scan0161 | |
| Phantom springing complaints, focusing on leaf friction and ride comfort. | 27th Aug 1928 | Box 67a \ 2 scan0162 | |
| Issues with Phantom model springing complaints and methods to reduce leaf spring friction. | 27th Aug 1928 | Box 67a \ 2 scan0163 | |
| Curves and qualifications for various car spring setups. | 27th Aug 1928 | Box 67a \ 2 scan0164 | |
| Continued document discussing the use of light versus heavy front springs for British and Continental conditions. | 27th Aug 1928 | Box 67a \ 2 scan0165 | |
| Graphs comparing spring poundage against axle weight for 20 HP front and rear springs. | 23th Aug 1928 | Box 67a \ 2 scan0166 | |
| Spring chart for Phantom 'V' series to F2B models, correlating spring poundage to empty axle weight for front and rear axles. | 23th Aug 1928 | Box 67a \ 2 scan0167 | |
| Procedural control over modifications related to Phantom springing complaints. | 29th Aug 1928 | Box 67a \ 2 scan0168 | |
| Standardisation of road spring plate clips to improve design and reduce cost. | 7th Sep 1927 | Box 67a \ 2 scan0169 | |
| Implementation plan and costs for new or modified chassis parts. | 10th Sep 1928 | Box 67a \ 2 scan0170 | |
| Discrepancy in 40/50 suspension test results related to shock dampers and tyre pressures. | 10th Sep 1928 | Box 67a \ 2 scan0171 | |
| Proposing a sliding pad for existing Phantom rear springs to avoid increasing the stock of springs. | 13th Sep 1928 | Box 67a \ 2 scan0172 | |
| Which vehicle units receive sufficient lubrication from drip plugs. | 13th Sep 1928 | Box 67a \ 2 scan0173 | |
| Amended print for the 40/50 suspension, advising the previous copy should be scrapped. | 17th Sep 1928 | Box 67a \ 2 scan0174 | |
| Explaining discrepancies in suspension tests for the 40/50 model. | 17th Sep 1928 | Box 67a \ 2 scan0175 | |
| Spring modifications for cars destined for Australia due to breakages and poor road conditions. | 17th Sep 1928 | Box 67a \ 2 scan0176 | |
| Low-pressure tyres and road spring characteristics for Phantom and 20 HP models. | 20th Jul 1923 | Box 67a \ 2 scan0177 | |
| Suspension settings, spring flexibility, and shock damper improvements. | 8th Sep 1928 | Box 67a \ 2 scan0178 | |
| Use of 'Sports type' springs for cars destined for Australia. | 8th Sep 1928 | Box 67a \ 2 scan0179 | |
| Proposal to change the material for front road springs from Chrome Vanadium to Silico Manganese steel to improve reliability and reduce cost. | 3rd Oct 1927 | Box 67a \ 2 scan0180 | |
| Cover memo regarding springing on the 40/50 HP Chassis. | 17th Sep 1928 | Box 67a \ 2 scan0181 | |
| Customer complaints regarding 40/50 HP chassis springing and ongoing experiments to resolve the issues. | 17th Sep 1928 | Box 67a \ 2 scan0182 | |
| Issues of friction and seizure in rear springs, particularly from Firth's manufacture, and proposing solutions. | 22th Sep 1928 | Box 67a \ 2 scan0183 | |
| Suggestion to pre-treat new springs by 'bedding' the plates to prevent complaints of hard riding. | 22th Sep 1928 | Box 67a \ 2 scan0184 | |
| Issues and potential improvements for the New Phantom's springing system, including friction, greasing, and damping. | 27th Sep 1928 | Box 67a \ 2 scan0185 | |
| Issues and cost-effectiveness of cadmium plating for springs, noting Mr. Royce's reservations. | 1st Sep 1928 | Box 67a \ 2 scan0186 | |
| Request for overnight maintenance to clean, polish, and grease the rear springs and disconnect the shock absorbers on car 98-NK. | 27th Sep 1928 | Box 67a \ 2 scan0187 | |
| Further tests into road spring friction, the phenomenon of 'digging-in' on used springs, and potential remedies. | 29th Sep 1928 | Box 67a \ 2 scan0188 | |
| Spring design comparing cadmium-plated, Firths, and Woodheads springs to address issues with internal friction and digging-in. | 22th Sep 1928 | Box 67a \ 2 scan0189 | |
| Issues of spring friction and seizure in Firths manufactured rear springs and proposed remedies. | 22th Sep 1928 | Box 67a \ 2 scan0190 | |
| Tests to determine the internal friction of 40/50 road springs, comparing front and rear springs under various conditions. | 29th Sep 1928 | Box 67a \ 2 scan0191 | |
| Test report with three graphs showing deflection vs. applied load for a rear road spring after a 5000-mile run. | 10th Sep 1928 | Box 67a \ 2 scan0192 | |
| Graph showing results of three load deflection tests on a lubricated rear road spring after a 5000-mile run. | 10th Sep 1928 | Box 67a \ 2 scan0193 | |
| Series of three graphs showing deflection versus applied load for a lubricated standard front road spring. | 13th Sep 1928 | Box 67a \ 2 scan0194 | |
| Road spring tests for a standard front spring after 3 1/2 years of service, tested dry. | 18th Aug 1928 | Box 67a \ 2 scan0195 | |
| Series of three graphs showing the results of road spring tests measuring deflection versus applied load. | 18th Aug 1928 | Box 67a \ 2 scan0196 | |
| Graphs showing load vs. deflection test results for a standard, lubricated, cadmium-plated front road spring. | 14th Sep 1928 | Box 67a \ 2 scan0197 | |
| Series of three graphs showing the results of front spring tests, plotting deflection against applied load. | 12th Sep 1928 | Box 67a \ 2 scan0198 | |
| Comparison of two leaf spring designs from Firths and Woodhead, showing bedding and tip sections. | 25th Feb 1928 | Box 67a \ 2 scan0199 | |
| Comparison of Woodheads and Firths rear road springs at 1700 lbs load. | 25th Feb 1928 | Box 67a \ 2 scan0200 | |
| Car springing, ride comfort, weight distribution, and tyre choices. | 1st Oct 1928 | Box 67a \ 2 scan0201 | |
| Design of road springs, comparing different end shapes and spring types. | 2nd Oct 1928 | Box 67a \ 2 scan0202 | |
| The standardisation of cadmium plating and the bedding of road spring leaves. | 8th Oct 1928 | Box 67a \ 2 scan0203 | |
| Improvements to the manufacturing process and quality of road springs. | 20th Oct 1928 | Box 67a \ 2 scan0204 | |
| The objectives of a series of tests carried out on the 40/50 suspension system's axle movement. | 29th Oct 1928 | Box 67a \ 2 scan0205 | |
| Analysis of vehicle suspension performance, focusing on spring and axle movements in relation to speed, road conditions, and riding comfort. | 29th Oct 1928 | Box 67a \ 2 scan0206 | |
| Test data on axle movement and car swaying under various road conditions and speeds. | 29th Oct 1928 | Box 67a \ 2 scan0207 | |
| Car velocities and axle motion experiments, including details of the testing apparatus. | 29th Oct 1928 | Box 67a \ 2 scan0208 | |
| Analysis of axle velocity, damping settings, and the natural frequency of vehicle suspension and pitching. | 29th Oct 1928 | Box 67a \ 2 scan0209 | |
| Blueprint showing graphs from rear axle motion experiments on a Phantom 98 N.K. vehicle. | 29th Oct 1928 | Box 67a \ 2 scan0210 | |
| Blueprint graph showing the results of rear axle motion experiments on a Phantom 98 N.K. | 29th Oct 1928 | Box 67a \ 2 scan0211 | |
| New method for protecting and lubricating springs using lanoline and an adhesive tape puttee. | 2nd Nov 1928 | Box 67a \ 2 scan0212 | |
| Note advising of a new method for spring protection and the resulting deletion of lubricators from gaiters. | 2nd Nov 1928 | Box 67a \ 2 scan0213 | |
| Correcting a previous note about the Enots lubricator on gaiters, agreeing to replace it with a plain plug. | 5th Nov 1928 | Box 67a \ 2 scan0214 | |
| Cancelling previous instructions on road spring lubrication due to lanoline lubricant failing to prevent squeaking. | 12th Nov 1928 | Box 67a \ 2 scan0215 | |
| Investigation into the cause and remedy for a squeaking front spring through various lubrication methods. | 15th Nov 1928 | Box 67a \ 2 scan0216 | |
| Methods and difficulties related to spring lubrication. | 20th Nov 1928 | Box 67a \ 2 scan0217 | |
| Test procedure for road spring lubrication using felt inserts and copper oil pipes. | 21th Nov 1928 | Box 67a \ 2 scan0218 | |
| Experiments on spring lubrication and the use of spring gaiters. | 21th Nov 1928 | Box 67a \ 2 scan0219 | |
| Communication from Melbourne regarding complaints of harsh front springs on 40/50 HP models and a suggestion for improvement. | 29th Nov 1928 | Box 67a \ 2 scan0220 | |
| Persistent troubles with front road spring squeaks and potential design solutions. | 1st Dec 1928 | Box 67a \ 2 scan0221 | |
| Diagram illustrating the lubrication of a flexible cable spring. | 5th Dec 1928 | Box 67a \ 2 scan0222 | |
| Individual wheel weights of cars to investigate excess poundage on offside springs. | 5th Dec 1928 | Box 67a \ 2 scan0223 | |
| Vehicle weight distribution and proposing a change to the spring poundage. | 5th Dec 1928 | Box 67a \ 2 scan0224 | |
| Short memo confirming the results of previous reports on car springing. | 12th Dec 1928 | Box 67a \ 2 scan0225 | |
| Instructing that all future cars should be fitted with similar springs on each side of the chassis. | 7th Dec 1928 | Box 67a \ 2 scan0226 | |
| Ineffectiveness of lubricating springs to improve poor riding quality at certain speeds. | 27th Dec 1928 | Box 67a \ 2 scan0227 | |
| Evolution of a new effective scheme for front axle parallel control, known as Phantom Springing. | 17th Jan 1929 | Box 67a \ 2 scan0228 | |
| Query from Melbourne regarding chassis springing specifications for Australian models versus English models. | 17th May 1929 | Box 67a \ 2 scan0229 | |
| Tests carried out on axle control loads and front spring ratings. | 26th Jun 1929 | Box 67a \ 2 scan0230 | |
| Test report on the twist of an axle control, with a graph showing deflection versus load. | 9th Jul 1927 | Box 67a \ 2 scan0231 | |
| Decision to standardize the spring chassis for Australia to match the English specification. | 1st Jul 1929 | Box 67a \ 2 scan0232 | |
| Broken front springs for the Phantom model, comparing vehicles with and without front hydraulics. | 24th Jul 1929 | Box 67a \ 2 scan0233 | |
| Letter describing a test rig (SK-209) designed for testing road spring bedding. | 10th Aug 1929 | Box 67a \ 2 scan0234 | |
| Procedure for bedding-in and testing leaf springs to eliminate squeaks. | 26th Oct 1929 | Box 67a \ 2 scan0235 | |
| Comparing American and English car springing, discussing spring stiffness, damping, and potential improvements. | 26th Oct 1929 | Box 67a \ 2 scan0236 | |
| Two schemes for lubricating the Phantom I cantilever spring. | 11th Nov 1929 | Box 67a \ 2 scan0237 | |
| Continued note on spring lubrication, damper complaints, and shock absorber loading specifications. | 11th Nov 1929 | Box 67a \ 2 scan0238 | |
| Drawing of a centrally lubricated cantilever spring. | 7th Nov 1929 | Box 67a \ 2 scan0239 | |
| Blueprint detailing modifications to lubricate the ends of cantilever spring leaves. | 5th Nov 1929 | Box 67a \ 2 scan0240 | |
| Requesting an inspection car for work on the lubrication of Phantom I springs. | 5th Nov 1929 | Box 67a \ 2 scan0241 | |
| Modification to the cantilever spring lubrication to prevent leakage. | 15th Nov 1929 | Box 67a \ 2 scan0242 | |
| Blueprint of a lubricated cantilever spring. | 14th Nov 1929 | Box 67a \ 2 scan0243 | |
| Adoption of drilled HP shock absorber valves and the lubrication of Phantom I springs with grooves. | 9th Nov 1929 | Box 67a \ 2 scan0244 | |
| Arrangements for an experiment on the lubrication of Phantom I springs. | 27th Nov 1929 | Box 67a \ 2 scan0245 | |
| Springing issues, weight distribution, and riding improvements for the Phantom I model. | 27th Nov 1929 | Box 67a \ 2 scan0246 | |
| Ongoing tests on Phantom I suspension to address complaints of harsh low-speed riding and pitching. | 10th Dec 1929 | Box 67a \ 2 scan0247 | |
| Vehicle riding qualities, discussing pitching, springs, and hydraulic shock absorbers. | 10th Dec 1929 | Box 67a \ 2 scan0248 | |
| Suspension improvements for light fabric-bodied cars and Phantom models. | 10th Dec 1929 | Box 67a \ 2 scan0249 | |
| Modifications for Phantom 1 special front springs. | 10th Dec 1929 | Box 67a \ 2 scan0250 | |
| Phantom I springing complaints and road tests of lower rated springs to reduce high-speed pitching. | 31th Jan 1930 | Box 67a \ 2 scan0251 | |
| Request to modify a Phantom II bump chassis to test Phantom I front springs. | 1st Feb 1930 | Box 67a \ 2 scan0252 | |
| Improvements to the Phantom 1's ride by testing new front springs to reduce pitching. | 3rd Feb 1930 | Box 67a \ 2 scan0253 | |
| Query regarding a proposed 1.4 inch additional deflection in the front springs for the Phantom I and its effect on the vehicle's level. | 11th Feb 1930 | Box 67a \ 2 scan0254 | |
| Technical note on the Phantom 1 front spring deflection and camber. | 11th Feb 1930 | Box 67a \ 2 scan0255 | |
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