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).
Test bench results comparing B.HP output and valve timings for 110° and standard camshafts.
| Identifier | ExFiles\Box 33\4\ Scan077 | |
| Date | 29th April 1924 | |
| COPY½ X1770 29.4.24. TEST BENCH - CUTOUT OPEN. B.H.P. OUTPUT CURVES - 110º and STANDARD CAMSHAFTS. X3423 X1770 R.P.M. 110º STD. % GAIN. 520 25.8 24.6 5.5 750 36.7 35 5.5 1000 48.7 46.7 5.0 1250 60.5 58.1 4.5 1500 68.7 67.8 1.5 1750 75.1 75.6 --- 2000 78.3 78.3 --- VALVE TIMINGS .010 Clearance. 110º I.O 7º P.T.D.C. I.C 29º P.B.D.C. E.O 47º B.B.D.C. E.C T.D.C. ---------- STD. I.O 20º P.T.D.C. I.C 43º P.B.D.C. E.O 47º B.B.D.C. E.C T.D.C. ---------- Hs{Lord Ernest Hives - Chair}/GHF. | ||