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 and calculations showing the relationship between water's boiling point, pressure, and head.
| Identifier | ExFiles\Box 24\5\ Scan153 | |
| Date | 16th July 1928 | |
| X766 16.7.28. BOILING POINT OF WATER AS AFFECTED BY HEAD. Temp. (°C) Pressure (lbs/sq.") Diff. Diff. per degree. 90 10.16 95 12.26 2.10 .42 100 14.70 2.36 .47 110 20.8 6.10 .61 Between 100°C and 110°C the rate of increase of temperature with pressure is about 1/.605 = 1.65 centigrade degrees per lb. per square inch. Each 1 lb/sq.inch corresponds to 144 / 62.3 = 2.31 feet head. whence rise of temperature per foot increase of head = 1.65 / 2.31 = .715°C. approx. For 10°C rise pressure should be 6.1 lbs/sq.inch, i.e. head should be 14.0 feet. EFC. | ||