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).
Vehicle suspension characteristics, over-self centering effect, and comparing different suspension schemes.
| Identifier | ExFiles\Box 173\1\ img296 | |
| Date | 31th January 1934 guessed | |
| II produce the majority of the over-self centering effect which is so objectionable. This effect is reduced if the wheel angle to the ground is straightened up as the spring deflects and this is accomplished by attaching the top arm to the pivot so that it makes an angle with the horizontal as shown in sketch. This merely emphasises the effect due to one arm being shorter than the other and concentrates this effect on bump rather than rebound. Its efficacy seems dubious to me as it increases the transverse king pin lean at the same time as it alters the wheel angle, and more transverse lean causes more self centering. © Oy thinks the best Dubonnet example is fitted to the Opel. He is quite convinced, however, that the Cadillac scheme is the best for the large car from the point of weight cost & efficiency. He thinks the friction of any lever ratio coupled with the probable friction of the coil spring in its tube is likely to be enough to spoil the ride. | ||