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).
Report page analyzing engine efficiency and heat transfer, comparing a standard system with others by referencing test curves.
| Identifier | WestWitteringFiles\O\2January1926-March1926\ Scan93 | |
| Date | 14th January 1926 guessed | |
| contd :- -13- The greater range of mixture strengths giving steady running of the engine is another indication that the standard is the most efficient of the three in correcting uneven distribution. Referring back to curve No.4. which gives the temp. of the heating mediums of the standard and water hot spots, we can assume from consideration of the last test that the normal heat input to the carburetter is greater than given by the other systems, though probably not in proportion to the temperatures shown. It follows therefore from curve No.3. - showing the temperature rise of the heating medium - and in which the max. temperature reached is not greatly different to the full load conditions, that from for the standard system the increase of heat input with time must be more rapid than given by the other two. HEAT ADDED TO THE JACKET WATER AND HEAT ABSORBED BY CHARGE. If the heat supplied to the boiler by the exhaust gas with the superheated system, is greater than that absorbed by the charge then the difference will be added to the normal heat supplied to the jacket water. It was under conditions of full load that we made the following tests to determine these values. The method adopted was that of measuring the water passing through the hot spot system and observing the over-all temperature rise between the inlet to the boiler and the outlet from the hot spot. This method could only be used when the water flow was sufficient to keep the outlet temperature below boiling. The following curves show the results contd :- | ||