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).
Test results for increased capacity helical gears in Bentley oil pumps.
| Identifier | ExFiles\Box 149\2\ scan0095 | |
| Date | 18th January 1935 | |
| LEC 4238 BENTLEY OIL PUMPS INCREASED CAPACITY HELICAL GEARS EB 2133/4 TESTED WITH MOBILIOL "I" AT 75°C DELIVERY PRESSURE = 25 Lbs/sq" (RELIEF VALVE BLOCKED UP) DELIVERY PTS/HR TABLE: | PUMP RPM | H1 | H2 | H3 | H4 | STD PUMP E53638 | |----------|------|------|------|------|-----------------| | 200 | 16 | 60 | 58 | 61 | 110 | | 400 | 287 | 330 | 340 | 340 | 300 | | 800 | 812 | 910 | 910 | 875 | 670 | | 1200 | 1333 | 1438 | 1415 | 1410 | 1030 | | 1600 | 1918 | 1920 | 1900 | 1900 | 1450 | PUMP SPEED = 1/2 ENGINE SPEED INITIAL RELIEF PRESSURES PUMP H1 = 17 Lbs/sq" PUMP H2 = 17 Lbs/sq" PUMP H3 = 18 Lbs/sq" PUMP H4 = 17 Lbs/sq" bB | ||