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).
Drawing comparing the 'suggested reach' and 'usual reach' of a component within a cylinder head.
| Identifier | ExFiles\Box 162\3\ img217 | |
| Date | 2nd May 1941 guessed | |
| SUGGESTED REACH USUAL REACH .675 +.015 | ||