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).
Graph showing the effect of different carburettor needles on vehicle acceleration versus speed.
| Identifier | ExFiles\Box 155\1\ scan0035 | |
| Date | 19th July 1932 guessed | |
| ACCELERATION - 19 - Ex EFFECT OF CARBURETTOR NEEDLE SEMI EXP: CARB: LE C.2972 --- 90° NEEDLE - x - 85° NEEDLE - o - 95° NEEDLE 12/41 AXLE 18" RIMS (1.07 OF STD) 5.25 C/R SEMI EXP CARB. 114° CAMSHAFT E.82448 TAKEN IN FRANCE BY G.W.H. COMPARATIVE VALUE ONLY ACCEL: - FT/SEC² SPEED M.P.H. | ||