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).
Modification options for a 25HP engine and the resulting horsepower outputs.
| Identifier | WestWitteringFiles\T\March1929-December1929\ Scan266 | |
| Date | 19th November 1929 | |
| HS.{Lord Ernest Hives - Chair} } FROM R.{Sir Henry Royce} RY. } Copy to SG.{Arthur F. Sidgreaves - MD} Copy to WOR.{Arthur Wormald - General Works Manager} re. 25HP. ORIGINAL R1/M19.11.29. X5770. We shall have:- (1) China 1. as at present - HP. 57. (2) China 2. modified, using present head - HP. 70. (3) China 3. modified, using modified coring to present head - HP. 75. (4) Japan 1. modified from original slightly - HP. 80. The HP. given in each case is the approximate maximum peak, with open exhaust. China 1. can be made into China 2. by scrapping the camshaft, valves, exhaust, etc. China 2. exhaust pipe is new, and the same as China 3. China 2. valves and cams are new, but the same as China 3. and Japan 1. - i.e. we want, and can have, only one move to one part, so it must be the best possible, carefully finessed, and up-to-date in design and material. R.{Sir Henry Royce} [STAMP: RECEIVED NOV 23 1929] | ||