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 plotting BHP and BMEP against RPM for an engine with two different valve timing settings.
| Identifier | ExFiles\Box 3\4\ 04-page184 | |
| Date | 26th January 1933 | |
| UNIT C.9 J1 HEAD BENSPORT J1. C.9 RM{William Robotham - Chief Engineer} 83 JAN 26/33 COMP. RATIO 6.3:1 CAMSHAFT E59159 (13 1/2") CYL. HEAD STANDARD E56604 2.1875 SU CARBS ON SPECIAL PIPE BETWEEN 1&2 5&6 CYLS. BALANCED WITH SPECIAL 1.00" RESTN. ① EARLY TIMING ② LATE TIMING B.H.P B.M.E.P R.P.M CTS{C. Trot Salt - Carburation} THIS CYL HEAD HAD NOT BEEN TREPANNED ROUND THE INLET VALVE. TAPPETS AT .020 T.D.C 10.5° 45.5° 54.3° B.D.C T.D.C. 6.5° 3.5° 54.5° 50.7° B.D.C | ||