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).
Performance graph for an 'Amal' metal piston type petrol pump, plotting delivery rate against pump speed under various conditions.
| Identifier | ExFiles\Box 27a\2\ Scan072 | |
| Date | 6th June 1932 | |
| "AMAL" METAL - PISTON TYPE PETROL PUMP, PISTON LOCKED SOLID WITH PLUNGER, WITH RETURN-TO-TANK PIPE BLANKED, OPEN, STD PUMP, WITH RETURN-TO-TANK PIPE OPEN, BLANKED, DELIVERY PTS./HR., PUMP SPEED R.P.M., 220, 200, 180, 160, 140, 120, 100, 80, 60, 40, 20, 500, 1000, 1500, 2000 | ||