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 7% copper piston alloy and suggesting tests on its composition.
| Identifier | ExFiles\Box 181\M8\ img035 | |
| Date | 4th September 1917 | |
| To Ry. from R.R. C. to Wlk. C. to eirtn. C. to RV. ORIGINAL 3128 3144 3136 X. 2749 St.{Capt. P. R. Strong} Margaret's Bay. Sept. 4th. 1917. 16 Re - Piston Alloy. RB{R. Bowen}/W3917. 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. pp R.R. | ||