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).
Data table showing oil flow from the relief valve to the rocker shaft and timing gears at various engine speeds.
| Identifier | ExFiles\Box 106\5\ scan0110 | |
| Date | 23th September 1933 | |
| 23.9.33. OIL FLOW FROM RELIEF VALVE TO ROCKER SHAFT AND TIMING GEARS WITH .062" BI-PASS HOLE IN THE MAIN VALVE. | ENGINE R.P.M. | TIME FOR 1 PINT. | PTS/HR. | ROCKER SHAFT OIL PRESS. | OIL TEMP. START | OIL TEMP. FINISH | |---------------|--------------------|---------|-------------------------|-----------------|------------------| | 1000 | 3 mins. 38 secs | 16.51 | 8 lbs/sq.in. | 70ºC | 70ºC | | 1500 | 2 " 49 " | 21.30 | 9.5 " | 70ºC | 73ºC | | 2000 | 2 " 23 " | 25.17 | 10.5 " | 70ºC | 76ºC | | 3000 | 1 " 56 " | 31.03 | 12.0 " | 70ºC | 78ºC | | 3500 | 1 " 44 " | 34.61 | 15.0 " | 70ºC | 82.50ºC | Hs{Lord Ernest Hives - Chair}/Wym.{G. Harold Whyman - Experimental Manager} | ||