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).
Table showing heat distribution as a percentage of initial heat supply at various engine RPMs.
| Identifier | ExFiles\Box 24\4\ Scan092 | |
| Date | 6th September 1923 guessed | |
| SHEET 1. CONTD:- HEAT DISTRIBUTION AS PERCENTAGE OF INITIAL HEAT SUPPLY. R.P.M. 500 1000 1500 2000 Thermal equt. of work done. 18.3 19.90 20.45 19.8 Loss to engine friction. 3.7 3.35 4.4 6.3 Heat loss to jackets. 31.3 23.65 24.5 22.2 Loss through exhaust radiation etc. (by difference) 46.7 53.10 50.7 51.7 Heat supplied. 100 100 100 100 | ||