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).
Experiments on Phantom suspension, dampers, and weight distribution.
| Identifier | ExFiles\Box 71\2\ scan0148 | |
| Date | 27th April 1926 | |
| To Hs.{Lord Ernest Hives - Chair} ) DA.{Bernard Day - Chassis Design} } FROM R.{Sir Henry Royce} BY.{R.W. Bailey - Chief Engineer} ) +8840 RL/M27.4.26. c. to BJ. E.{Mr Elliott - Chief Engineer} OY. NA.{Mr Nadin} PHANTOM SUSPENSION. DAMPERS AND DISTRIBUTION OF WEIGHT. X.8410 X.235 X.8840 I notice two points that may be escaping notice :- (1) One way shock dampers must be set for double the load to have the same damping. I conclude from the experiments that if this is done the double way is the better. Possibly the RR. scheme of say 25% up and 75% down may be the best but 33/66% and 50/50% might be tried. RR. hydraulic are so good because we can have anything. (2) When you are experimenting with weight distribution the springs in all cases should be kept normally loaded. One thinks that 500 lbs. more in the back, and also the 500 lbs. behind the rear axle had the result of increasing the load on the rear springs more in each case, which might account for the improved riding. We hope for improvement with the weight back. We shall be pleased to find double acting shock dampers preferable. R.{Sir Henry Royce} | ||