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 versus a normal 107° shaft, showing B.HP and B.M.E.P. curves.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page273 | |
| Date | 1st January 1940 | |
| COMPARISON OF 110° SHAFT INTENDED TO IMPROVE SLOW RUNNING AND NORMAL 107° E.100863. LARGE PEREGRINE CARBS: 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 LEGEND: E.100863 (solid line) HS.{Lord Ernest Hives - Chair}970 (dashed line) AXES: B.H.P. (Y-axis left) B.M.E.P. LBS/SQ" (Y-axis right) M.P.H. (X-axis bottom) VALVE TIMING DIAGRAMS: Left Diagram (HS.{Lord Ernest Hives - Chair}970): 110° IN EX. O2O IA.5A. 44 40 Right Diagram (E.100863): 107 IN. EX. O2O 8 5 34 42 AXIS VALUES: B.H.P.: 10, 20, 30, 40, 50, 60, 70, 80 B.M.E.P.: 70, 80, 90, 100, 110, 120 X-AXIS: 500, 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000 M.P.H.: 66, 75, 83 | ||