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" | ||
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).