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).
Calculations for engine volume displacement and gas velocities for different carburetor pipes.
Identifier | ExFiles\Box 127\2\ scan0157 | |
Date | 16th December 1940 guessed | |
3½ x 4½ Engine (260 cu.in) Volume displaced at 1000 R.P.M. = (260 x 1000) / (12³ x 2 x 60) = 1.25 cft/sec. Smallest Stromberg pipe used = 1.4" dia - Gas vel = 117 ft/sec. (with single carb.) Standard Wraith pipe 1.6" dia - Gas vel = 89.4 ft/sec. Centre 4 cyls. of 3 S.U. B.80 1.6" dia - Gas vel = 59.7 ft/sec. Rovers. 1091. | ||