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 the springing and ride quality between car models 1 EX and 6 EX.
| Identifier | Morton\M22\ img181 | |
| Date | 23th August 1920 | |
| To HS.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} Copy to G.F. W.O.M. P.A. W.W. E.F.C. E.T. x=1 confirmed -96 D R7/G20/S/20. 23 AUG 1920 original - XE1 eh ORIGINAL X.37639 RE SPRINGING OF 1 EX. COMPARED WITH 6 EX. x.34616 X.18923 X.2628 RECEIVED With Reference to the riding and springing of 1 EX. compared with 6 EX., 1 EX. is a particularly well sprung car, and might be kept as a model for other cars. I think the springing of this is softer than that on 6 EX. At the same time 1 EX. was slightly steadier on the road, and I can only conclude that the rear shock absorbers are definitely more effective. They are probably set with much more spring pressure on the plates because the softer springing would lead the car to be more liable to bumping on the buffers, whereas this car was never noticed to do so, but 6 EX. which appeared to have stiffer springs, did on one occasion, bump on the buffers. Moreover, the rear shock absorbers on 6 EX. are definitely quieter than those on 1 EX. I should be glad if you would kindly find out if my conclusions are correct. It will be remembered that the road springs to which we are reverting (made of the thinner plates) have definitely more damping friction than those made of the thicker plates, which will result in steadier running. R.{Sir Henry Royce} | ||