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).
Graph showing the results of tests on an F.XL supercharger drive with two gears to determine limiting torque.
| Identifier | ExFiles\Box 36\2\ scan 174 | |
| Date | 23th July 1928 | |
| F.XL SUPERCHARGER DRIVE. 10 TO 1 GEARS. TESTS WITH TWO GEARS ONLY FITTED, TO DETERMINE LIMITING TORQUE. Y-AXIS: H.P. INPUT TO CAUSE SLIP. 0 10 20 30 40 50 60 70 80 X-AXIS: ENGINE R.P.M. 1000 1250 1500 1750 2000 2250 2500 T.S.N. 23.7.28 | ||