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).
Comparison of existing (14-EX) and ideal suspension damper performance graphs for different driving conditions.
| Identifier | ExFiles\Box 68\2\ scan0215 | |
| Date | 30th March 1928 guessed | |
| contd :- -5- which operates only at large amplitudes, and preferably more on the bump than the rebound. This means that we can damp at high speeds without spoiling the low speed riding. What we have on 14-EX now is : 14-EX (1) Low speed riding prevents desirable amount of damping being used for high speed driving. Graph ① text: PRESSURE Large amplitude low frequency. Fast road driving. Small amplitude high freuqneyc. Boulevard riding. 4 BUMP 2 0 2 REBOUND 4 Ideal (2) The viscosity effect is slight until large amplitudes are attained. Then very great at max. spring compression. Graph ② text: Large amplitude low frequency. Fast road driving. Small amplitude high frequency Boulevard riding. 4 BUMP 2 0 2 REBOUND 4 Perhaps we are asking too much from the dampers, but suspension problems remain our most difficult subject and hydraulic dampers of the double acting type such as the R.R., seem to lend themselves remarkably well to obtaining any desired contd: | ||