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 graph comparing small versus large valves for the Peregrine engine, showing B.HP and B.M.E.P. against R.P.M.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page211 | |
| Date | 29th July 1932 guessed | |
| SMALL V LARGE VALVES PEREGRINE PLUG REACH .600 OPEN EXHAUST 1 5/8 THROTTLE S.U. 5.85 C/R --- TWO EX. VALVES THROAT DIA 1.125 AREA / LITRE 2.34 sq in ------ ORDINARY INLET VALVE '' '' 1.200 AREA / LITRE 2.69 sq in Valve Timing Diagram: IN, EX, .020 CL'CE, 9, 3, 37, 29 CURVES RUN INLET TAPPET CL'CE .004 EX .006 ANGLE BETWEEN CAMS 104º TWO INLET CAMS B.H.P. B.M.E.P. R.P.M. | ||