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).
Page detailing boiling points at different pressures and engine temperature/pressure tests at various speeds.
| Identifier | WestWitteringFiles\K\September1923\ Scan48 | |
| Date | 12th July 1923 | |
| R.R. 493A (40 H) (SL 42 12-7-23). J.H., D.{John DeLooze - Company Secretary} -2- EXPERIMENTAL REPORT. Expl. No. REF: circulation, as determined by the venturi meter, remaining normal up to the increased boiling point. Afterwards a reduction in flow occurred, similar to that experienced with-out 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 oC. | |---|---|---| | 14.7 | 0 | 100 | | 17.8 | 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 oC. | Eng.outlet water temp. oC. | Average eng. temp. oC. | Gauge pressure. lbs./sq.in. | |---|---|---|---|---| | 800 | 62.25 | 110 | 86.1 | 8 | | 1000 | 97.75 | 111.5 | 104.6 | 8 | | 1250 | 99.5 | 114.5 | 107 | 10 | } Boiling | 1500 | 100.75 | 115.5 | 108.1 | 10 | } The increase of average temperature above that at which engine normally runs was accompanied by slight decrease of power. contd:- | ||