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 and table comparing the performance of AC and RR petrol pumps against engine RPM.
| Identifier | WestWitteringFiles\V\2January1931-April1931\ Scan056 | |
| Date | 14th March 1931 guessed | |
| PETROL-PUMP COMPARISON Graph Data: Y-Axis: GALLONS / HOUR (0, 2, 4, 6, 8, 10, 12) X-Axis: ENGINE RPM (0, 500, 1000, 1500, 2000, 2500, 3000) Graph Lines: AC PUMP DELIVERY R.R. PUMP DELIVERY PHANTOM CONSUMPTION. TWIN-CARBS (FULL THROTTLE) DELIVERY AT 1500 RPM Table Data: CONDITIONS OF TEST | AC-PUMP | RR-PUMP PIPE LINE (INSIDE DIA) | .240" | .240" SUCTION PIPE (LENGTH) | 172" | 144" DELIVERY (LENGTH) | 54" | 48" SUCTION HEAD | 13" | 15" DELIVERY HEAD | 24" | 36" PISTON STROKE | .250 | .050 BACK-PRESSURE AT WHICH PUMP CEASES TO DELIVER | 2.5 lbs/sq in | 10 lbs/sq in | ||