Energy diagram for a 40-50 engine with a compression ratio of 3.9, plotting energy distribution against RPM.
| Identifier | WestWitteringFiles\K\November1923\ Scan45 | |
| Date | 14th November 1923 guessed | |
| ENERGY DIAGM OF THE 40-50 R.R. COMP: RATIO 3.9. SEE SHEET 2. % OF THE INITIAL PETROL ENERGY. R P M LOSSES THRO - COOLING WATER. EXH. GASES RADIATION CHARGING WK. INDICATED TH. EFFCY PISTON POWER MOTOR FRICTION TH. EFFICIENCY | ||
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).