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).
Blueprint diagram illustrating the oil flow through a pump system at different operating temperatures.
| Identifier | ExFiles\Box 131\1\ scan0162 | |
| Date | 20th December 1935 guessed | |
| COLD WARMING UP HOT RELIEF VALVE OIL PUMP TO BEARINGS BY-PASS VALVE OIL PUMP SCREEN | ||