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).
Material property requirements and manufacturing plans for barrels.
| Identifier | ExFiles\Box 176\3\ img103 | |
| Date | 26th June 1940 | |
| - 2 - Continued:- Yield 45/50 ton/sq.in. Ult. stress 60/65 " " Elongation Not less than 12% Izod " " " 14 ft. lbs. 3. MANUFACTURE. We are hoping that you will be able to undertake the manufacture of these first 30 barrels, and thus develop the necessary technique so that any subsequent parts might be produced by Taylor Bros. Manchester. Yours faithfully, CHIEF TECHNICAL PRODUCTION ENGINEER. ROLLS-ROYCE LIMITED. | ||