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).
Continued report on vehicle performance, comparing a sleeve valve engine against a Daimler and a poppet valve Hispano engine.
| Identifier | WestWitteringFiles\P\2July1926-September1926\ Scan062 | |
| Date | 1st August 1926 guessed | |
| contd :- -4- Its acceleration above 30 m.p.h. is very good indeed. The engine is smooth at the higher speeds in contra distinction to the Daimler. Mon. Weymann states that he can drive all day at 3000 r.p.m. and that it will turn over at 3500. Actually we had no opportunity of driving it above 65 m.p.h. It certainly gave the impression of being remarkably fast. This car gave me as favourable an impression as any I have tried and certainly the high efficiency sleeve valve engine is very much more silent than the corresponding poppet valve engine as exemplified by the Hispano. Hs{Lord Ernest Hives - Chair}/W. A.{Mr Adams} Robotham. | ||