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 A.C. petrol pump showing delivery rate versus engine RPM under specific test conditions.
| Identifier | WestWitteringFiles\R\2December1927-February1928\ Scan179 | |
| Date | 17th February 1928 guessed | |
| A.C. PETROL PUMP. A.C. PETROL PUMP DELIVERY. PHANTOM CONSUMPTION FULL THROTTLE. GALS/MIN ENGINE R.P.M. A.C. PUMP & FILTER. CONDITIONS FOR TEST. PIPING STANDARD ·240" INSIDE DIA. SUCTION PIPE 172" LONG DELIVERY 54" LONG SUCTION HEAD -13" DELIVERY 24" PISTON STROKE ·250" PUMP CEASES TO DELIVER AT A BACK PRESSURE OF 2·5 LBS./□" THE A.C PUMP CONTINUES TO DELIVER DOWN TO AN ENGINE SPEED OF 100 R.P.M. PUMP ASSUMED TO BE DRIVEN OFF THE CAMSHAFT, HENCE ENGINE SPEED IS PUMP SPEED HALVED. | ||