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).
Secret memo regarding an improved, strengthened piston with five oil-retaining rings.
| Identifier | ExFiles\Box 66\1\ scan0032 | |
| Date | 20th March 1925 | |
| To BY.{R.W. Bailey - Chief Engineer} from E.{Mr Elliott - Chief Engineer} c. to CJ. HS.{Lord Ernest Hives - Chair} X. 8040 S E C R E T. E.{Mr Elliott - Chief Engineer} A.{Mr Adams} C. PISTONS+ E2/M20.3.25. We send you herewith LeC. 2035., shewing the improved strengthened piston with 5 rings arranged for oil retaining, all rings being pinned except the top one, as described in our memo. to Mr. Royce E1/M20.3.25. E.{Mr Elliott - Chief Engineer} | ||