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 a vacuum pump on a Super Sports engine, plotting petrol delivery and pump suction against engine RPM.
| Identifier | WestWitteringFiles\S\September1928-October1928\ Scan005 | |
| Date | 1st September 1928 | |
| VACUUM PUMP. (SUPER SPORTS ENGINE) ENGINE No SS{S. Smith}-3. BORE = 1.125" STROKE = .800" COMP. RATIO = 2.13 PUMP RUNS AT HALF SPEED OF ENGINE. Left Y-Axis: PETROL DELIVERY (PINTS PER HOUR) Right Y-Axis: SUCTION OF PUMP. (INCHES OF MERCURY) X-Axis: R.P.M. OF ENGINE. Graph Lines: FUEL DELIVERY REQUIRED BY ENGINE (FULL THROTTLE) SUCTION OF PUMP. FUEL SUPPLIED BY PUMP THRO' STANDARD AUTO-VAC. FUEL SUPPLIED BY PUMP THRO' STANDARD AUTO-VAC WITHOUT NON-RETURN VALVE IN SUCTION ELBOW. | ||