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).
Laboratory report on the chemical analysis of two non-ferrous alloy pistons.
| Identifier | ExFiles\Box 76\3\ scan0001 | |
| Date | 20th November 1916 | |
| RR. 864a. Mr Hives No 980 ROLLS-ROYCE, LIMITED. L 522 LABORATORY REPORT ON NON-FERROUS, ALLOY. To: Mr Nadin Date: 20th Nov 1916 Re: Piston alloy in the form of: 2 pistons marked Porous & Stood well received at works on: received by: laboratory on: 16th Nov CHEMICAL ANALYSIS. Headers: Porous / Stood well Aluminium: .. .. .. .. .. % Copper: .. .. .. .. .. 12.4 % / 11.76 % Zinc: .. .. .. .. .. Trace % / Trace % Tin: .. .. .. .. .. % Antimony: .. .. .. .. .. % Lead: .. .. .. .. .. % Iron: .. .. .. .. .. 0.33 % / 0.27 % Arsenic: .. .. .. .. .. % Nickel: .. .. .. .. .. % Silicon: .. .. .. .. .. 0.36 % / 0.28 % Phosphorus: .. .. .. .. .. % Sulphur: .. .. .. .. .. % Manganese: .. .. .. .. .. % Oxide of Aluminium: 0.70 % / 0.20 % TOTAL ESTIMATED: % Remarks, etc. Both these pistons had been tested in the engine. The porous one has numerous pores throughout its mass. On the face these had become very serious especially near the exhaust. Microphotographs indicate oxidation in cell walls. Signature: HCSD | ||