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).
Comparison of engine timing settings and resulting performance curves.
| Identifier | Morton\M19\ img203 | |
| Date | 17th June 1931 guessed | |
| Hs{Lord Ernest Hives - Chair} 379 COMPARISON OF TIMING APPROXIMATING TO L.E.C. 2918 & BEST TIMING FOUND BY EXPERIMENT A TIMING APPROX. TO L.E.C. 2918 1/4" SHAFT B BEST TIMING R.{Sir Henry Royce} ENGINE, CAMS 110° SHAFT C AS B BUT TAPPET CLEARANCE ADJUSTED TO GIVE BEST RESULTS. CLAUDEL CARB. 4.9 C.R. ALUM. HEAD. OPEN EX. H.P. M.E.P. R.P.M. Graph Labels: A, B, C Timing Diagram A: EX, IN, 12, 14, 60, 65.5 Timing Diagram B: EX, IN, 17, 18, 56, 59 Timing Diagram C: EX 236, IN 256, 110, 9, 18, 48, 58 .020" TAPPET CLEARANCE Axes values: 30, 50, 70, 80, 90, 100, 110, 130, 150, 170, 500, 1000, 1500, 2000, 2500, 3000, 3500 | ||