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).
Increasing power from a 20 HP engine and requesting an estimate.
| Identifier | ExFiles\Box 57\1\ Scan266 | |
| Date | 2nd November 1926 | |
| To E. {Mr Elliott - Chief Engineer} To Hs. {Lord Ernest Hives - Chair} from R. {Sir Henry Royce} X5770 R9/M2.11.26. 20 HP. X.5770 X̶.̶5̶7̶7̶1̶ X.5230 Several times we have started out to get more power from this engine by :- (1).... Improved exhaust. (2).... Slightly higher compression. (3).... Greater volumetric efficiency. Will E. {Mr Elliott - Chief Engineer} make an estimate of what we should expect, and if we are not getting it, Derby say why? R. {Sir Henry Royce} | ||