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 comparing a 110° shaft with a normal 107° shaft to improve slow running.
| Identifier | ExFiles\Box 1\10\ B001_X106 TO X 110-page065 | |
| Date | 21th June 1933 guessed | |
| RM.{William Robotham - Chief Engineer} PR.{Percy H. Rose} 39. COMPARISON OF 110° SHAFT INTENDED TO IMPROVE SLOW RUNNING AND NORMAL 107° SHAFT E.100863. LARGE PER: CARB: INDUCTION PIPE E.100958 WITH POCKET FILLED IN. SLEEVE FITTED INDUCTION PIPE TAPERING FROM 1.750 TO 1.500 DIA: LARGE VALVE TURBULENT HEAD. 6-25 C/R.{Sir Henry Royce} E.100863. HS.{Lord Ernest Hives - Chair} 970 B.H.P. R.P.M. B.M.E.P. INDUCTION DEPN INS. HG. Left Valve Timing Diagram: Ex. .020 IN T.C. 7 14 35 48 Right Valve Timing Diagram: Ex. .020 IN 8 5 34 42 | ||