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).
Motoring loss curve tests under various engine component configurations.
| Identifier | ExFiles\Box 133\1\ scan0109 | |
| Date | 17th September 1936 | |
| -5- Hs{Lord Ernest Hives - Chair}/Ed.{J. L. Edwards}1/KW.17.9.36. Section VII. Motoring loss curves were taken as under. The unit was built up with the semi-hemispherical head to give a C.R. of 7.3, and run under the following conditions:- (1) Cooling fan off, petrol off, & petrol pump coupled. (2) " " on, " " " " " (3) " " off, " on, " " " " (4) " " " off, " " " uncoupled. (5) The engine was first run, then the cooling fan and petrol were turned off, and the unit motored. These curves were all run with Rudge timing and are shown on Fig. XXX. It was decided that the curve with the petrol pump off, petrol off, and fan off gave the most accurate results, this being almost identical with curve (5) when the petrol pump was uncoupled. The Bentley camshaft was now fitted, and a curve run under the above final conditions, comparative curves of Rudge and Bentley being shown in Fig.XXXI. The cylinder head was now removed, and a curve run, then the piston rings, and finally the piston and conn. rod, though due to vibration this last curve was a failure. The results as obtained were graphed against similar results on the Bentley as in Fig. XXXII. This concluded the work done on the Rudge unit and it is now proposed to go over the results and comment on same. | ||