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 showing the effect of induction pipe diameter on a twin carburetor engine.
| Identifier | ExFiles\Box 179\2\ img055 | |
| Date | 27th November 1931 | |
| RM{William Robotham - Chief Engineer} P.36 27/11/31 EFFECT OF PIPE DIA ON TWIN CARB. 114° CAMSHAFT T-H-O INLET CAMS HIGH LIFT ROCKERS OPEN EXHAUST COMP. RATIO 4·65:1 1·3" CHOKES INDUCTION PIPE DIA 1·875 1·550 Valve Timing Diagram: T.D.C Ex (Exhaust): opens 49° BBDC, closes 2.5° ATDC In (Inlet): opens 1.5° BTDC, closes 52° ABDC 020 CLCE Left Y-Axis: B.H.P. Right Y-Axis: B.M.E.P. Lbs/sq in X-Axis: R.P.M. | ||