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).
Hand-drawn sketch of a component's cross-section with dimensional annotations.
| Identifier | ExFiles\Box 180\M3\M3.7\ img005 | |
| Date | 27th June 1919 guessed | |
| .010" .006" .004" .003" .002" E.H. | ||