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).
Graph comparing the delivery performance of a Standard Spur Gear Pump against a Helical Gear Pump for Bentley oil pumps.
| Identifier | ExFiles\Box 149\2\ scan0097 | |
| Date | 23th January 1935 | |
| BENTLEY OIL PUMPS LIMITATION OF DELIVERY - DUE TO INLET PIPE RESTRICTION - WITH SPECIAL REFERENCE TO INCREASED CAPACITY PUMPS DELIVERY PRESSURE 25LB/SQ INCH MOBILOIL 'D' TEMP 75°C HELICAL GEAR PUMP - GEARS EX 16376/7 (50% INCREASED CAPACITY ABOVE E59928 L.O.P. PUMP) STANDARD-SPUR GEAR-PUMP GEARS ES1764/S. E53658 L.O.P. DELIVERY PTS/HR PUMP SPEED R.P.M. | ||