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 showing BHP and MEP against RPM, with corresponding valve timing diagrams for three different camshafts.
| Identifier | ExFiles\Box 182\M19\ img285 | |
| Date | 7th July 1931 | |
| B.H.P. 110 90 70 50 30 R.P.M. 500 1000 1500 2000 2500 3000 3500 M.E.P. lbs/sq in 110 90 70 A B C TIMING WITH .013 TAPPET CLEARANCE DIAGRAM A: I.O. TDC E.C. 26° 23° I.C. 66° E.O. 67° B.D.C. VALVE LIFT .402 CAM .3755 DIAGRAM B: I.O. TDC E.C. 37° I.C. 62° E.O. 65° B.D.C. VALVE LIFT .469 CAM .35B DIAGRAM C: TDC I.O. E.C. 10° I.C. 52° E.O. 50° B.D.C. VALVE LIFT .429 CAM .3246 | ||