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).
Engine power development, focusing on valve timing, lift, and supercharger application.
| Identifier | ExFiles\Box 13\2\ 02-page161 | |
| Date | 9th January 1932 | |
| E.{Mr Elliott - Chief Engineer} HS.{Lord Ernest Hives - Chair} } FROM R.{Sir Henry Royce} BY.{R.W. Bailey - Chief Engineer} } (At Le CanadelHenry Royce's French residence) x7090 R2/M6.1.32. Sent from WW. 9.1.32. X5090 X7090 X4553 C. to - SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} RG.{Mr Rowledge} CAR WORK - ENGINE POWER. Good and sound progress is being made and I quite agree with most of the things that are proposed, but I want particular care taken that we do not attempt too much - (1) In increase valve lift and very sudden opening, because it may make conditions that are impractical, un-reliable and wanting in silence. (2) In the 'Bensport' the supercharger will help us to bear some resistance through the inlet valves, and we need not attempt (1) to an extent that risks trouble. (3) Valve timing seems quite good since we adopted judging it with greater tappet clearance. With .020 I should like to see the inlet at 45° and exhaust 40°, rather than the other way about, because it might be better for detonations. R.{Sir Henry Royce} | ||