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).
Gearbox control test results for a 20/25 HP oil pump with various pressures.
| Identifier | ExFiles\Box 179b\4\ img008 | |
| Date | 3rd April 1933 guessed | |
| GEARBOX CONTROL TESTS. TESTS TAKEN WITH 20/25 HP. OIL PUMP. .003" RADIAL .004 END GAUGES CASTROL XL. 70°C PUMP INLET TEMP. | PUMP R.P.M. | 0 lb/sq.in Press. Pts/Hr. | 100 lb/sq.in Press. Pts/Hr. | 200 lb/sq.in Press. Pts/Hr. | 300 lb/sq.in. Press. Pts/Hr. | |---|---|---|---|---| | 250 | 222 | 80.5 | - | - | | 500 | 410 | 306 | 115 | - | | 750 | 646 | 497 | 365 | 160 | | 1000 | 884 | 720 | 606 | 388 | | 1250 | 1090 | 974 | 838 | 621 | | 1500 | 1332 | 1242 | 1082 | 895 | | 1750 | 1637 | 1567 | 1385 | 1118 | | 2000 | 1900 | 1800 | 1637 | 1272 | | ||