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 comparison graph of a 110° shaft for improved slow running versus a normal 107° shaft.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page272 | |
| Date | 1st January 1939 | |
| 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 IN 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. 36 In. 48 Top: 7, 3 Center: .020 Right Valve Timing Diagram: Ex. 34 In. 42 Top: 8, 5 Center: .020 | ||