Test results for engine cooling performance, with tables for boiling points at different pressures and temperatures at various speeds.
| Identifier | ExFiles\Box 38\2\ Scan254 | |
| Date | 14th September 1923 guessed | |
| contd :- -2- determined by the venturi meter, remaining normal up to the increased boiling point. Afterwards a reduction in flow occurred, similar to that experienced without the pressure system. The following table gives approx. the boiling points corresponding to different pressures :- Abs. press: lbs.sq.in. | Gauge press: lbs.sq.in. | Boiling point °C. 14.7 | 0 | 100 17.5 | 2.8 | 105 18.7 | 4 | 107.6 20.7 | 6 | 110 Test 2. Temperature and pressure at various speeds, full load with fan working. R.P.M. | Eng.inlet water temp. to °C. | Eng.outlet water temp. to °C. | Average eng.temp: °C. | Gauge pressure. lbs.sq.in. 500 | 62.25 | 110 | 86.1 | 8 1000 | 97.75 | 111.5 | 104.6 | 8 1250 | 99.5 | 114.5 | 107 | 10 ) Boil- 1500 | 100.75 | 115.5 | 108.1 | 10 ) ing The increase of average temp. above that at which the engine normally runs was accompanied by slight decrease of power. contd :- | ||
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).