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 an AC petrol pump versus an RR petrol pump, alongside Phantom engine consumption data.
| Identifier | ExFiles\Box 17\5\ Scan063 | |
| Date | 14th March 1931 guessed | |
| PETROL-PUMP COMPARISON Y-AXIS: GALLONS / HOUR X-AXIS: ENGINE RPM 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" | 42" SUCTION HEAD | 13" | 15" DELIVERY HEAD | 21" | 36" PISTON STROKE | .250 | .050 BACK-PRESSURE AT WHICH PUMP CEASES TO DELIVER | 2.5 lbs/sq" | 10 lbs/sq" | ||