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).
Progress report on the single valve air pump and relief valve.
| Identifier | ExFiles\Box 37\4\ scan 100 | |
| Date | 14th August 1917 | |
| To R.{Sir Henry Royce} from EH. c. to BJ. c. to E.{Mr Elliott - Chief Engineer} c. to By.{R.W. Bailey - Chief Engineer} X.3131 3099 EH3/LG14.8.17. I X 3099 X 3110 SINGLE VALVE AIR PUMP & RELIEF VALVE X.3130. X.3131. A single valve air pump is in progress, it will be completed in 5 or 6 days. The D.O. have promised that the relief valve should be detailed by the end of this week. EH. | ||