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).
Graphs and text detailing oil consumption tests in relation to engine pressure and speed.
| Identifier | ExFiles\Box 132\4\ scan0100 | |
| Date | 19th October 1937 | |
| -3- Before starting actual tests we carried out tests with various oil pressures using standard pistons and the result of these tests are shown on Figs. V and VI. FIG. VI Sketch VII Graph 1 Title: VARIATION OIL CONSUMPTION WITH PRESSURE Graph 1 Subtitle: ENGINE R.P.M.- 4000 Graph 1 Y-axis: OIL CONSUMPTION (PTS/HR) Graph 1 X-axis: PRESSURE LB/sq.in. Graph 1 Label: FIG. V Graph 1 Stamp: MTHS{Reg Matthews} 20.3.36 Graph 2 Title: 25/30 OIL CONSUMPTION TESTS Graph 2 Y-axis: OIL CONSUMPTION (MILES/GALLON) Graph 2 X-axis: MPH R.P.M. Graph 2 Legend: CURVE ① OIL PRESS SET AT 25 LB/sq.in. AT 4000 R.P.M. AND ALLOWED TO FALL IN NORMAL MANNER AT LOWER SPEEDS Graph 2 Legend: CURVE ② OIL PRESS SET AT 25 LB/sq.in. AT EACH SPEED Graph 2 Stamp: MTHS{Reg Matthews} 20 3 36 Text Block: Variation of oil pressure from 25 lb/sq.in. to 35 lb/sq.in. makes little difference to the consumption, but above 35lb/sq.in. the increase in consumption is rapid. Fig. VI shows the effect of oil pressure varying with speed in normal manner and with constant pressure the difference in consumption is as expected from results of Fig.V entirely confined to the lower speeds where there is a wide variation in pressure. Continued. | ||