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).
Porosity of a piston alloy with 7% copper and proposing tests without zinc or tin.
| Identifier | ExFiles\Box 37\3\ scan 090 | |
| Date | 4th September 1917 | |
| To By.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} c. to CLK. c. to Hl. c. to Kstrtn. c. to BJ. X.3177. St.{Capt. P. R. Strong} Margaret's Sept. 4th 1917 X.3123 X.3177 X.3136 R8/W3917. RE -PISTON ALLOY X.2749. Regarding the piston alloy having 7% of copper. The works complaining that this alloy is more porous than our old 12% cannot, one would think, be entirely right, and must be caused through some other reason. I am quite agreeable to Mr. Kesterton making a test without the zinc, or without the tin, or without both. I should have thought that the zinc at least would have been an advantage, bringing the metal more in the line with the crankchamber metal which is so good. E.R. 335B (200 T) (S.D. 408. 26-1-17) Bm. 2/156/12. R | ||