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).
Improving vehicle ride quality by adjusting flexible springs and hydraulic shock dampers.
| Identifier | ExFiles\Box 16\7\ Scan078 | |
| Date | 24th July 1928 guessed | |
| contd :- -2- depart from flexible springing for the sake of high speed riding, but since we have got hydraulic dampers we must increase the effectiveness of these dampers, especially on the recoil (high pressure side) until we lost slightly slow speed perfection of riding for a very large gain in high speed steadiness. You will remember that it has been decided to use still more flexible springs as std, until we have much greater complaint of the cars bumping on the rubber buffers, that is to say, we ought to be changing the springs of an equal number of cars to stiffer springs as we are changing cars to more flexible springs. Whereas I believe at the moment we rarely, if ever, have to change to stiffer springs, we are continually being obliged to fit more flexible springs. SHOCK DAMPERS. I think whenever bad riding is complained of, and we have done all we can to tyres and road springs, we ought to replace the Hartford shock dampers xxxxxxxx with our own hydraulic dampers, and I feel sure that the low pressure side should be 50% or less than the high pressure side, to take full advantage of this system. Finally, I recommend that the road springs be made more and more flexible until we are troubled with bumping on the buffers, and then increase the effectiveness of the shock dampers until the bumping is less frequent. I am sure that if the above was carried out the complaints at present so prevalent would nearly disappear, because I feel that with our hydraulic dampers, and the other features of our car's perfection, we are in a betterposition than any of our competitors. The Expl: Dept: or the Production Dept. should have a spring expert who can at once visit any unsatisfactory car. We ought not to wait for him to get really cross before we attend to his complaints (which we must take as being reasonable until we have proved otherwise). I think Mr. Chandler would be very suitable for this, and he would collect a considerable amount of information so that we can put the matter directly before the owner before he has time to go about disgruntled, and so spoil what we hope is a good name. 14-EX (EAC.7.) is I think a beautifully sprung car, but could I believe have double the recoil (high pressure) damping with definite improvement at higher speed, without low speed being spoilt. R.{Sir Henry Royce} | ||