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 progress and testing of a single valve air pump and separate relief valve.
| Identifier | ExFiles\Box 37\4\ scan 101 | |
| Date | 1st August 1917 | |
| To EH. from R.{Sir Henry Royce} c. to J.{Mr Johnson W.M.} c. to EFC. X.3099 R1/B10.8.17. X.3110 X.3130 - SINGLE VALVE AIR PUMP AND SEPARATE X.3099 RELIEF VALVE We should be glad to know how these are progressing. After they have been tested, models should be sent to the States for Mr. Olley. R, EFC | ||