From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
List of testing criteria and mileage requirements for suspension and shock dampers.
| Identifier | ExFiles\Box 154a\3\ scan0218 | |
| Date | 27th March 1936 guessed | |
| SUSPENSION & SHOCK DAMPERS. (1) Mechanical strength. Bump tests. (2) Freedom from pitching, rolling, hump-backed bridge throwing etc. (3) Silence. Freedom from wear. (4) Oil leaks. (5) Stresses in road springs. (6) Overall weight of system. (7) Front suspension and steering geometry. 20,000 miles Continental. 5,000 miles English and London conditions. 200 hours Bump. | ||