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 diagram illustrating a modification to a pump blade to reduce noise.
| Identifier | ExFiles\Box 130\2\ scan0044 | |
| Date | 13th July 1936 guessed | |
| END VIEW ^v 1 M/M.{Mr Moon / Mr Moore} LOOKING AT VIEW OF PUMP. THE TOP BLADE SHOULD BE BENT AS SHEWN & FITTED THIS WAY UP. THIS CURES ALL NOISY PUMPS, HOT OR COLD. | ||