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 of an 'Autopulse' electric petrol pump showing delivery rate versus head at various operating voltages and suction heads.
| Identifier | ExFiles\Box 41\1\ Scan017 | |
| Date | 12th August 1926 | |
| Note. Voltage variation during test about .25 volt. APPROXIMATE DELIVERY OF "AUTOPULSE" ELECTRIC PETROL- PUMP w.r.t. VARYING DELIVERY HEAD AND APPLIED OPERATING VOLTAGE AND FOR TWO SUCTION HEADS ——— 46” SUCTION - - - 22” SUCTION DELIVERY [GALLONS PER HOUR] 15 volts 12 volts 9 volts AHR 12.VIII-26 E.P.C. | ||