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).
The satisfactory performance of a new air pump.
| Identifier | ExFiles\Box 46\3\ Scan005 | |
| Date | 7th July 1923 guessed | |
| -2- Memorandum No. 5057. The new air pump which Frith fitted on that occasion has proved entirely satisfactory and has overcome the deficiency of pressure which had previously been experienced. St. {Capt. P. R. Strong} COPY | ||