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).
Graph showing the effect of a non-return valve on the petrol feed system of a Phantom II, comparing petrol delivery against engine RPM.
| Identifier | ExFiles\Box 17\5\ Scan023 | |
| Date | 29th October 1930 guessed | |
| PHANTOM II PETROL FEED SYSTEM: EFFECT OF NON-RETURN VALVE IN PETROL PIPE FROM REAR TANK TO AUTOVAC. (REAR TANK FULL) STANDARD SYSTEM: ________ STANDARD SYSTEM WITH NON RETURN VALVE: -- -- -- PETROL DELIVERY (PTS/HOUR) ENGINE R.P.M 100 90 80 70 500 750 1000 1250 1500 1750 2000 | ||