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).
Analysis of the factors controlling the limiting oil temperature on F.XI engines.
| Identifier | ExFiles\Box 69\4\ scan0354 | |
| Date | 17th October 1927 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/ACL. c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to BY.{R.W. Bailey - Chief Engineer} X8771 Hs{Lord Ernest Hives - Chair}/ACL1/LG17.10.27. SOME FACTORS CONTROLLING THE LIMITING OIL TEMPERATURE ON F.XI. ENGINES. X38443 X3871 We have now completed certain tests and made an analysis of some of the factors controlling the temperature rise of the lubricating oil on F.XI. engines. These initial experiments have been made with the object of shewing the distribution of heat in the engine and although most of the tests here described have been conducted on a 6-cyl. test unit and consequently the quantitative results must not be regarded as the same for the complete 12-cyl. engine, they serve to shew some of the chief sources where the oil receives its heat. If we consider the general distribution of heat in the engine in terms of the initial heat energy of the fuel supplied we get an idea of the duty expected of our cooling systems in dissipating the surplus heat. Usually heat distribution diagrams split up the initial fuel energy into the following parts :- (1) Effective motor power (or B.HP). (2) Loss to friction, (3) " " exhaust and radiation. (4) " " jacket water. As an example an energy diagram is supplied for the Silver Ghost. We find however the distribution is not so simple as outlined above and the border line between some of the losses is not clearly defined. contd :- | ||