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 gear Bentley oil pumps showing delivery rates and initial relief pressures.
| Identifier | ExFiles\Box 132\3\ scan0033 | |
| Date | 18th January 1935 | |
| 18.1.35 LEE 4288 BENTLEY OIL PUMPS INCREASED CAPACITY HELICAL GEARS EB2133/4 TESTED WITH MOBILIOL "D" AT 75°C Delivery Pressure - 25 Lbs/sq in. (RELIEF VALVE BLOCKED UP) | PUMP R.P.M | DELIVERY PTS/HR | | | | | |---|---:|---:|---:|---:|---:| | | H1 | H2 | H3 | H4 | STD PUMP E33658 | | 200 | 16 | 60 | 58 | 61 | 110 | | 400 | 287 | 330 | 340 | 340 | 300 | | 800 | 812 | 910 | 910 | 875 | 670 | | 1200 | 1355 | 1438 | 1415 | 1410 | 1030 | | 1600 | 1918 | 1920 | 1900 | 1900 | 1450 | PUMP SPEED = 1/2 ENGINE SPEED INITIAL RELIEF PRESSURES PUMP H1 = 17 Lbs/sq in PUMP H2 = 17 Lbs/sq in PUMP H3 = 18 Lbs/sq in PUMP H4 = 17 Lbs/sq in ROLLS-ROYCE, LTD PRINT ROOM 19 JAN 1935 | ||