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).
The effects of raised crown pistons on oil temperature and efficiency.
| Identifier | ExFiles\Box 148\1\ scan0162 | |
| Date | 9th June 1939 | |
| -3- The figures show, that when the compression ratio is raised by means of a raised crown piston, heat to the oil is decreased on account of increased efficiency. As already stated, our main concern was to find out if the sump oil temperature was increased by using raised crown pistons. We find, therefore, that for a given inlet oil temperature, the outlet temperature decreases with the increase in bump size on the piston. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} | ||