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).
Calculation of engine volume displacement and gas velocity for different carburettor pipes.
| Identifier | ExFiles\Box 123\1\ scan0071 | |
| Date | 8th January 1941 guessed | |
| 3 1/2 x 4 1/2 Engine (260 cu.in) Carburettion Volume displaced at 1000 R.P.M. = (260 x 1000) / (12^3 x 2 x 60) 1036 = 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 J S.U. B.80 1.6" dia - Gas vel = 99.7 ft/sec. ------------------- | ||