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).
Blueprint graph comparing different engine timing configurations found by experiment.
| Identifier | ExFiles\Box 13\2\ 02-page104 | |
| Date | 17th June 1931 guessed | |
| COMPARISON OF TIMING APPROXIMATING TO L.E.C. 2918 & BEST TIMING FOUND BY EXPERIMENT HS{Lord Ernest Hives - Chair} 379 H.{Arthur M. Hanbury - Head Complaints} 379 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. B.H.P. R.P.M. .020" TAPPET CLEARANCE Timing Wheel A: A, Ex, IN, 12, 14, 60, 65.6 Timing Wheel B: B, Ex, IN, 17, 18, 59, 56, 70 Timing Wheel C: C, Ex 236, IN 256 110, 9, 18, 48, 58 | ||