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).
Friction dampers and front spring design, discussing material choices and camber issues.
| Identifier | ExFiles\Box 6\4\ 04-page169 | |
| Date | 15th May 1926 guessed | |
| contd :- -3- to fit accurately it could be hammered when in position. The face of the alum. on the drum could have ferodo rivetted to it if by experiment it was proved advisable. In which ways these friction dampers work we do not know exactly. Apparently they must slip about circumferentially, and it may be that they would work better if made of heavier gravity material, such as brass, so we might try a brass as well as an aluminium one. With regard to the front springs I can only find out that some error has arisen between DA.{Bernard Day - Chassis Design} and Derby. The drawing made at WW. required .35 camber. It was again set out at Derby and it was concluded during DA{Bernard Day - Chassis Design}'s visit that the spring could be flat. My own examination is that the flat spring loses half an inch as conveniently seen from measuring the top of the frame over the axle to the axle pad, in which case the Derby drawing does not agree with the original drawing. The only, and nearest way out of the difficulty is to get some springs with ¼" camber. At the same time it may be advisable to use a rather different rubber which is thicker and strikes the top of the spring between the clips. This will be advisable but will not be a material point except that an extra depth of rubber should tend to save the springs from being overstressed, and softening the shock when the buffer is struck. My own ideas are that there should be 2" of clear space, and 2" of rubber, and that the height of the frame from the ground should be the same as the old car under normal load. Regarding the front wheel brakes affecting the lean of contd :- | ||