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 curve and analysis of an average Phantom oil pump's capacity.
| Identifier | ExFiles\Box 178\1\ img136 | |
| Date | 19th May 1926 | |
| - 2 - Should, however, the pump be worn, resulting in large clearance between the gears and the case, the delivery will naturally be less than a leakproof pump. The following curve shews the pumping capacity of the average Phantom pump with the oil (Price's Motorine "C") at a temperature of 60°C and a back pressure - main oil pressure - of 21 lbs/sq.". Graph Text: PTS. PER MIN. R.P.M. E.A.C. OIL PUMP DELIVERY. BACK PRESS . 21 LBS/□" TEMP. 60° C. The supply given by the pump is greatly in excess of the demands of the bearings, as will be shewn, and the reason explained later. PRESSURE RELIEF VALVES. For oil of a given viscosity the discharge through the bearings, for a fixed bearing clearance, will depend upon the oil pressure. contd. | ||