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).
Blueprint showing a cross-section of a Coupling Flange for a Propeller Shaft.
| Identifier | ExFiles\Box 179b\2\ img165 | |
| Date | 26th November 1932 guessed | |
| DRILL TO CORRECT UNBALANCE COUPLING FLANGE - PROP SHAFT - PER II | ||