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).
Graph and analysis comparing fuel consumption curves for water heated, superheated, and standard exhaust heated systems.
| Identifier | ExFiles\Box 66a\1\ scan0096 | |
| Date | 2nd February 1926 guessed | |
| contd :- -11- Graph Data: 750. R.P.M. AIR TEMP 33 To 40 C BAROMETER 754 M.M. Y-Axis: PTS/B.H.P./HOUR. X-Axis: B.M.E.P. lbs/sq. in. Curve Labels: WATER HEATED, SUPERHEATED, STD EXH HEATED. Annotation: GAIN IN ECONOMY [MAX] By STD HOT SPOT. Annotation: MAX η P. Body Text: The specific consumption for the superheater water system is practically the same with .532 pts/HP/Hr. but the minimum consumption for the standard system is as low as .500 pts/HP/Hr. Also the standard has a wider range of consumption over which steady running can be obtained. The following curves are for 1500 r.p.m. At this speed a slightly higher B.M.E.P. is obtained with the water heated throttle, but this only amounts to 1 lb.sq.in. contd :- | ||