The development status of the 'H' engine, detailing requirements for the racing variant and the reliability of the service version.
| Identifier | ExFiles\Box 33\4\ Scan117 | |
| Date | 1st August 1928 | |
| 41770 To R. {Sir Henry Royce} from Hs. {Lord Ernest Hives - Chair} c.c. to BJ. Wor. {Arthur Wormald - General Works Manager} c.c. to RG. {Mr Rowledge} E. {Mr Elliott - Chief Engineer} c.c. to BY. {R.W. Bailey - Chief Engineer} HS {Lord Ernest Hives - Chair} 4/LG22, 8. 28. REPORT ON DEVELOPMENT OF 'H' ENGINE. X 4453 X 4674 X 4465 The development of this engine as a racing engine is waiting for :- (1) Improved volumetric efficiency. We expect to obtain this with modified camshafts. (2) Larger and more efficient blower and carburetter. As a service engine to develop 350 HP. at 2000 r.p.m. with 2 lbs. of boost, there appears to be very little to be done except to prove its reliability. We hope by the end of next month to complete 2 more 'H' engines - these engines will be practically identical to the present engine we are running. Hs. {Lord Ernest Hives - Chair} Report attc. | ||
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).