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 improvements, specifically regarding valve lift, supercharging, and valve timing.
| Identifier | ExFiles\Box 3\4\ 04-page019 | |
| Date | 9th January 1932 | |
| E.{Mr Elliott - Chief Engineer} } FROM R.{Sir Henry Royce} HS.{Lord Ernest Hives - Chair} } (At Le CanadelHenry Royce's French residence) BY.{R.W. Bailey - Chief Engineer} } X4553 R2/MS.1.32. Sent from VW. 9.1.32. C. to - SL. WDR. RG.{Mr Rowledge} X5090 X7090 X4553 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 45º and exhaust 40º, rather than the other way about, because it might be better for detonations. R.{Sir Henry Royce} | ||