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).
From Mr. Royce requesting an experimental trial of a vacuum pump for the 40/50 petrol feed system.
| Identifier | WestWitteringFiles\K\June1923\ Scan28 | |
| Date | 30th June 1923 | |
| TO HS.{Lord Ernest Hives - Chair} FROM DA.{Bernard Day - Chassis Design} ORIGINAL 40/50 VACUUM FEED. X3579 X3575 X3503 Mr. Royce wishes to try experimentally and temporarily a vacuum pump on the petrol system, to see whether it is preferable to get a pump to do the work of the Autovac system entirely, and also supply the engine under the conditions in which the Autovac fails. We do not know of any vacuum pump which you can buy, and we should like you to make enquiries, and see whether there is one available which could be temporarily fitted. We estimate that this pump does not need to be a very large one, and that one about the size of the power pressure pump would be sufficient. DA.{Bernard Day - Chassis Design} | ||