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).
The performance of brass and aluminium pistons in a carburetter for a 25 HP engine.
| Identifier | ExFiles\Box 31\4\ Scan188 | |
| Date | 4th July 1932 | |
| FOR S.U. FILE. (X1487) 4.7.32. Two types of piston were supplied for the 1 5/8" throttle diameter carburetter, one in brass weighing 1 lb 2 ozs. and the other in aluminium weighing 9 1/4 ozs. The best results on the 25 H.P. were obtained with W.O.2 needle and the brass piston. The only noticeable effect under these conditions was a slight hesitation on accelerating in the neighbourhood of 30 M.P.H. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||