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).
Analysis of vehicle suspension issues related to springs and shock absorbers.
| Identifier | ExFiles\Box 16\7\ Scan285 | |
| Date | 3rd September 1930 guessed | |
| -3- cushions or incorrect weights of springs and this is more important with weak springs. The tendency is for some of us to expect the shock absorber to carry load instead of using it as a friction or resistance machine to damp movement. I have tried cars the springs of which have been too weak and the Shock Dampers have been set up to counteract crashing the result is that an undue proportion of the Shock is taken by the damper and the customer complains of vibration and hard riding at low speeds. This is quite natural because one is riding on a Hydraulic machine instead of resilient, yet when a customer complains of hard riding, our thoughts fly to weaker springs whereas the opposite may be the cure with reduced S.A. loadings. I must say here that I am adopting an opinion that our springs now that they are well lubricated are too flexible I should like to have an opportunity of experimenting with springs which reduced deflection for a given load. I do not mean a heavier spring, but rather one which has less up and down movement. I also think our Hydraulic Shock Absorbers do not offer sufficient damping even when set up to 80/100 or 100/100. I should like to have authority to fit a double friction damper in instances where the circumstances appear to call for damping out violent rebounds. Ps. | ||