| Description | Date | Identifier | |
| Test report on fitting Ferodo interleaving material to springs on 1.EX Car and its effect on axle dither. | 7th Sep 1920 | Box 78 \ 2 scan0319 | |
| Continued discussion on leaf spring testing, comparing greasing versus using an interleaving material. | 7th Sep 1920 | Box 78 \ 2 scan0320 | |
| Steering wobbles and transmission knock in production cars, proposing design improvements. | 9th Sep 1920 | Box 78 \ 2 scan0321 | |
| Transmission knock, torque tube design, and electrical installation schemes for a new chassis. | 1st Sep 1920 | Box 78 \ 2 scan0322 | |
| Lubrication of road springs and modifications to shock damper design. | 10th Sep 1920 | Box 78 \ 2 scan0323 | |
| Use of ferodo interleaved plates for road springs and suggesting alternatives. | 10th Sep 1920 | Box 78 \ 2 scan0324 | |
| Test results for rear shock absorbers comparing dry fibre, greased fibre, and Ferodo washers. | 21th Sep 1920 | Box 78 \ 2 scan0325 | |
| Tests conducted on rear shock absorbers at varying tyre pressures. | 22th Sep 1920 | Box 78 \ 2 scan0326 | |
| The performance and noise issues of rear shock absorbers, with recommendations for improvement. | 22th Sep 1920 | Box 78 \ 2 scan0327 | |
| From Mr. Royce to C.J. regarding the performance and testing of production cars, specifically the 1.EX model. | 26th Sep 1920 | Box 78 \ 2 scan0328 | |
| Technical memorandum discussing improvements to car springing, tyres, and rear axle ratios. | 26th Sep 1920 | Box 78 \ 2 scan0329 | |
| Car performance issues, particularly the Hawk aero engine, and suggestions for suspension and electrical improvements. | 1st Sep 1920 | Box 78 \ 2 scan0330 | |
| Rear springing of cars, damping requirements, and the impact of changes in tyre manufacture. | 28th Sep 1920 | Box 78 \ 2 scan0331 | |
| List of five required improvements for the 40/50 HP chassis rear shock damper, following a visit. | 8th Oct 1920 | Box 78 \ 2 scan0332 | |
| The particulars of the Retrac Shock Absorber, with a comment on its poor construction. | 18th Oct 1920 | Box 78 \ 2 scan0333 | |
| The transfer of shock absorbers to America to address a complaint about springs on car 22-LW. | 18th Oct 1920 | Box 78 \ 2 scan0334 | |
| Confirmation of a telegram regarding stuck shock dampers and instructions to inspect a Humber car. | 18th Oct 1920 | Box 78 \ 2 scan0335 | |
| Points for attention following a visit to America, concerning post-war cars, rear springs, steering pivots, and ignition issues. | 11th Nov 1920 | Box 78 \ 2 scan0336 | |
| Fitting rear shock absorbers with bronze and steel plates, comparing their friction properties to fibre or Ferodo plates. | 13th Nov 1920 | Box 78 \ 2 scan0337 | |
| Friction measurements taken from the Ferodo Discs on a shock absorber for the 6.EX car. | 13th Nov 1920 | Box 78 \ 2 scan0338 | |
| Extract discussing issues with Ferodo material supplied for shock dampers, attributing the problem to water absorption. | 24th Jan 1921 | Box 78 \ 2 scan0339 | |
| Simplification of a front shock absorber connecting rod design for the 40/50 chassis. | 3rd Mar 1921 | Box 78 \ 2 scan0340 | |
| Complaints about the riding quality of cars and the potential solution of fitting shock dampers. | 28th Jun 1921 | Box 78 \ 2 scan0341 | |
| The fitting of rear shock absorbers to Mr. Fisher's car, 46-RE. | 15th Sep 1921 | Box 78 \ 2 scan0342 | |
| Supply, fitting, and cost of rear shock absorbers for chassis 46-RE, belonging to F.T. Fisher Esq. | 15th Sep 1921 | Box 78 \ 2 scan0343 | |
| Correspondence regarding the fitting and testing of shock absorbers on Chassis No. 46-RE. | 23th Sep 1921 | Box 78 \ 2 scan0344 | |
| Customer complaints regarding thick versus thin leaf springs on the 40/50 HP chassis. | 7th Oct 1921 | Box 78 \ 2 scan0345 | |
| Report discussing vehicle springing issues, including customer complaints, the role of tire pressure, shock absorbers, and the ideal design involving lubricated leaf springs. | 10th Oct 1921 | Box 78 \ 2 scan0346 | |
| The issues and considerations of fitting shock absorbers to customer cars, detailing required modifications and mixed feedback. | 7th Oct 1921 | Box 78 \ 2 scan0347 | |
| Report discussing the pros and cons of thin versus thick leaf springs, lubrication, friction, and potential complaints. | 10th Oct 1921 | Box 78 \ 2 scan0348 | |
| The difficulties of fitting shock dampers to the 40/50 HP chassis and the design of new ones for the Goshawk 11. | 8th Oct 1921 | Box 78 \ 2 scan0349 | |
| Springing and shock damper design for the 40/50 HP model. | 18th Oct 1921 | Box 78 \ 2 scan0350 | |
| Requesting experimental attention for lubricating shock dampers and their connections. | 18th Oct 1921 | Box 78 \ 2 scan0351 | |
| History of fitting, testing, and issues with rear shock absorbers. | 15th Nov 1921 | Box 78 \ 2 scan0352 | |
| Progress update on a 10,000-mile test for shock absorbers. | 15th Nov 1921 | Box 78 \ 2 scan0353 | |
| Minutes of a daily conference discussing the cost, feasibility, and necessity of retrofitting shock absorbers. | 2nd Jun 1920 | Box 78 \ 2 scan0354 | |
| Standardisation report and test results for rear shock absorbers. | 28th May 1920 | Box 78 \ 2 scan0355 | |
| Policy and costs of fitting shock absorbers to the 40/50 HP car. | 1st Nov 1921 | Box 78 \ 2 scan0356 | |
| Costs, reliability, and testing of shock absorbers for consideration as a standard part. | 11th Nov 1921 | Box 78 \ 2 scan0357 | |
| Intention, challenges, and policy regarding fitting shock dampers to post-war cars. | 23th Nov 1921 | Box 78 \ 2 scan0358 | |
| Shock damper performance, future policy, and post-war production challenges. | 23th Nov 1921 | Box 78 \ 2 scan0359 | |
| Increasing the wearing surface of a fitting and the use of 'Enot' greasing equipment. | 5th Dec 1921 | Box 78 \ 2 scan0360 | |
| Instructions for the removal of a rear shock-absorber from chassis 12LW for inspection. | 5th Dec 1921 | Box 78 \ 2 scan0361 | |
| Testing Hartford shock absorbers on a 40/50 HP chassis following a conference. | 1st Dec 1921 | Box 78 \ 2 scan0362 | |
| The performance and benefits of Hartford shock absorbers. | 7th Dec 1921 | Box 78 \ 2 scan0363 | |
| The advantages and disadvantages of fitting 'Hartford' shock absorbers. | 7th Dec 1921 | Box 78 \ 2 scan0364 | |
| Unsuitability of Hartford shock absorbers for the 40/50 chassis. | 9th Dec 1921 | Box 78 \ 2 scan0365 | |
| Use of thin leaf springs versus shock dampers, and the proposal to test Hartford shock absorbers. | 15th Dec 1921 | Box 78 \ 2 scan0366 | |
| The Goshawk 11 rear shock absorbers fouling the spring, suggesting a 'Hartford' scissor-type design for better clearance. | 16th Dec 1921 | Box 78 \ 2 scan0367 | |
| Solutions for crankchamber fumes and ride comfort issues related to springs and shock-dampers. | 20th Dec 1921 | Box 78 \ 2 scan0368 | |
| Short internal memo outlining an escalation procedure for unsatisfactory explanations. | 20th Dec 1921 | Box 78 \ 2 scan0369 | |
| Comparing different designs of shock dampers, including scissors, Hartford, and Truffault patterns. | 29th Dec 1921 | Box 78 \ 2 scan0370 | |
| Use of Hartford Shock Absorbers to address springing complaints on post-war cars. | 3rd Jan 1921 | Box 78 \ 2 scan0371 | |
| Test data on a 'Hartford' friction damper used to prevent car jaggering when braking. | 3rd Jan 1922 | Box 78 \ 2 scan0372 | |
| Arrangements and modifications for two Riviera cars bound for France. | 1st Feb 1922 | Box 78 \ 2 scan0373 | |
| Seeking feedback on the performance of Hartford shock absorbers, a 14-tooth axle, and the Pilot Jet carburetter. | 1st Feb 1922 | Box 78 \ 2 scan0374 | |
| The revised connecting rod for the 40/50 front shock absorber. | 9th Feb 1922 | Box 78 \ 2 scan0375 | |
| Issues with rear springs and cord tyres, recommending the fitment of double acting shock dampers. | 10th Feb 1922 | Box 78 \ 2 scan0376 | |
| Obtaining maximum damping effect using Hartford pattern shock absorbers and flexible springs. | 10th May 1922 | Box 78 \ 2 scan0377 | |
| Difference of opinion on spring strength and frictional load for rear shock absorbers. | 10th May 1922 | Box 78 \ 2 scan0378 | |
| Inter-office correspondence discussing the adoption of a simpler, more effective front shock absorber. | 10th Jun 1922 | Box 78 \ 2 scan0379 | |
| Request to investigate harshness and vibration in the front of a 40/50 model, potentially caused by the front springs and shock absorbers. | 22th Jul 1922 | Box 78 \ 2 scan0380 | |
| Recommendation to adopt the Goshawk-11 shock absorber for the 40/50 model to reduce costs and designs. | 1st Aug 1922 | Box 78 \ 2 scan0381 | |
| Adopting Goshawk front and rear shock absorbers for the 40/50 chassis. | 25th Aug 1922 | Box 78 \ 2 scan0382 | |
| Extract discussing the adoption of thin leaf springs and the fitting of shock absorbers to American and English cars. | 1st Sep 1922 | Box 78 \ 2 scan0383 | |
| Adjustments to car springs and shock dampers for vehicles intended for use on rough roads abroad. | 16th Oct 1922 | Box 78 \ 2 scan0384 | |
| Paddon's intention to get a new car and his advocacy for Hartford Shock Absorbers and front-wheel brakes. | 21th Dec 1922 | Box 78 \ 2 scan0385 | |
| Customer's complaint about front-wheel brakes, which may be linked to the absence of Hartford shock-absorbers. | 21th Dec 1922 | Box 78 \ 2 scan0386 | |
| Standardisation of a modification to the Front Shock Absorber Link to improve lubrication. | 3rd Oct 1923 | Box 78 \ 2 scan0387 | |
| The condition of shock absorbers from a 10,000-mile trial car, detailing issues after dismantling and testing. | 8th Jan 1924 | Box 78 \ 2 scan0388 | |
| Modifications to the 40/50 chassis shock absorbers and cantilever bracket. | 21th Jun 1924 | Box 78 \ 2 scan0389 | |
| Fitting of 'Lovejoy' shock absorbers on American cars versus the 'Hartford' type for Rolls-Royce cars. | 11th Jul 1924 | Box 78 \ 2 scan0390 | |
| Fouling of horizontal shock absorbers on the 40/50 HP model and a proposed modification. | 14th Jul 1924 | Box 78 \ 2 scan0391 | |
| Positioning and testing of shock absorbers for the 40/50 HP chassis. | 15th Jul 1924 | Box 78 \ 2 scan0392 | |
| Record card detailing a heat test conducted on chassis 774. | 2nd Oct 1908 | Box 78 \ 3 scan0001 | |
| Log of engine temperature readings at 600 revs, testing a special radiator without gills. | 16th Mar 1908 | Box 78 \ 3 scan0002 | |
| Log of engine and radiator temperature readings recorded over time during a test. | 16th Mar 1908 | Box 78 \ 3 scan0003 | |
| Heat test report for chassis 774, detailing temperature readings on different dates. | 3rd Oct 1908 | Box 78 \ 3 scan0004 | |
| Temperature tests comparing the performance of a new type radiator against an old type. | 19th May 1909 | Box 78 \ 3 scan0005 | |
| Test log recording various temperature and petrol consumption readings during road tests. | 22th Apr 1909 | Box 78 \ 3 scan0006 | |
| Radiator and water temperature performance during a road test in Scotland. | 21th Sep 1909 | Box 78 \ 3 scan0007 | |
| Temperature test results for a 'Silver Phantom' chassis during a hill climb on Amulree Hill. | 21th Sep 1909 | Box 78 \ 3 scan0008 | |
| Temperature test notes for a 29 sect flat tube radiator on a Hemingway chassis. | 1st Jun 1910 | Box 78 \ 3 scan0009 | |
| Ventilation scheme, noting the advantage of louvred side guards on 'A' Steering cars. | 20th May 1918 | Box 78 \ 3 scan0010 | |
| Radiator tests with temperature readings taken at one-minute intervals. | 10th Jun 1912 | Box 78 \ 3 scan0011 | |
| Temperature readings for atmospheric, water, and floorboards under varying engine loads. | 10th Jun 1912 | Box 78 \ 3 scan0012 | |
| Series of temperature readings for atmosphere, water, and floorboards under two separate test conditions. | 10th Jun 1912 | Box 78 \ 3 scan0013 | |
| Data log of atmospheric, water, and floorboard temperature readings. | 10th Jun 1912 | Box 78 \ 3 scan0014 | |
| Temperature readings from a test of a Hemingway radiator on a standard chassis during a road test. | 10th Jun 1912 | Box 78 \ 3 scan0015 | |
| Engine temperature test readings at full load recorded at one-minute intervals. | 10th Jun 1912 | Box 78 \ 3 scan0016 | |
| Data log of atmospheric, water, and floorboard temperature readings. | 10th Jun 1912 | Box 78 \ 3 scan0017 | |
| Temperature readings for a Forman radiator and floorboards during a road test with a slight trailing wind. | 10th Jun 1912 | Box 78 \ 3 scan0018 | |
| Log of temperature readings (Atmospheric, Water, Floorboards) taken at one-minute intervals with the engine at full load. | 10th Jun 1912 | Box 78 \ 3 scan0019 | |
| Log of atmospheric, water, and floorboard temperature readings. | 10th Jun 1912 | Box 78 \ 3 scan0020 | |
| Test results for a Zimmerman radiator on a standard chassis, showing temperature readings under specific running conditions. | 10th Jun 1912 | Box 78 \ 3 scan0021 | |
| Engine temperature readings recorded at one-minute intervals during a full load test at 25 miles per hour. | 10th Jun 1912 | Box 78 \ 3 scan0022 | |
| Table of temperature readings for atmosphere, water, and floorboards (underneath and on top). | 10th Jun 1912 | Box 78 \ 3 scan0023 | |
| List of weight and capacity specifications for four different types of radiators. | 11th Jun 1912 | Box 78 \ 3 scan0024 | |
| Comparison of weight and capacity for four different types of radiators. | 11th Jun 1912 | Box 78 \ 3 scan0025 | |
| Comparative water temperature tests on a dynamometer between Daimler and R.R. cars. | 16th Aug 1912 | Box 78 \ 3 scan0026 | |
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