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 1 3/8' and 1 1/4' S.U. carburettors, plotting B.HP and B.M.E.P. against R.P.M.
| Identifier | ExFiles\Box 93\2\ scan0008 | |
| Date | 15th May 1934 guessed | |
| COMPARISON OF 1 3/8 & 1 1/4 CARBURETTERS. C/R 6.37/1 RR PISTONS SHORT CYLINDERS OPEN EXH Valve Timing Diagram: Ex IN 020 7.1 3.8 48.5 52.8 Graph Key: Solid line: 1 3/8 DIA S.U. Dashed line: 1 1/4 DIA S.U. Axes: B.H.P. B.M.E.P. R.P.M. Diagrams Dimensions: Left Carburettor (1 1/4 DIA): 1.250 DIA BORE 1.600 DIA 1.360 DIA 5.650 2.500 2.125 5.050 Right Carburettor (1 3/8 DIA): 1.375 DIA. BORE 1.435 DIA 2.550 DIA 5.100 3.000 1.500 5.575 | ||