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).
The effects of adjusting valve timing and clearance on engine performance.
| Identifier | ExFiles\Box 182\M19\ img268 | |
| Date | 28th October 1931 guessed | |
| -2- us greater duration of opening on the inlet valve. We might also gain from a greater lift on the exhaust valve. A test with the 114º shaft A.{Mr Adams} shewed that if the exhaust valve clearance was increased to .030 a drop of 5 B.H.P. ensued at 3000 R.P.M. Hs{Lord Ernest Hives - Chair}/Bn.{W.O. Bentley / Mr Barrington} | ||