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).
Performance comparison graph for various Peregrine engine cylinder head configurations.
| Identifier | ExFiles\Box 3\4\ 04-page344 | |
| Date | 22th June 1933 guessed | |
| H5.1046 CYLINDER HEAD COMPARISON (PEREGRINE) CAMSHAFT HS.{Lord Ernest Hives - Chair}968 CURVES TAKEN OPEN EXHAUST LARGE PEREGRINE CARBURRETTER ON INDUCTION PIPE TO E100456 EXCEPT THAT POCKET ABOVE RISER IS FILLED IN. SLEEVE FITTED IN INDUCTION PIPE TAPERING FROM 1.750 TO 1.500 DIA. NO HEAT TO TOP OF PIPE. 1) LARGE VALVE (1.900 DIA INLET) TURBULENT HEAD. COMPRESSION RATIO 6.2:1 2) SMALL VALVE (1.725 DIA INLET) NON-TURBULENT HEAD. COMPRESSION RATIO 6.2:1 3) SMALL VALVE (1.725 DIA INLET) TURBULENT HEAD. COMPRESSION RATIO 6.2:1 4) LARGE VALVE (1.900 DIA INLET) NON-TURBULENT HEAD. COMPRESSION RATIO 6.2:1 B.H.P. B.M.E.P. (LB/SQ. IN.) R.P.M. VALVE TIMING (ONE ELEMENT) T.D.C. E.O. I.C. I.O. E.C. 54° 14° | ||