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 detailing engine warming tests, comparing a superheated system and measuring heat flow to the cooling water using a calorimeter.
| Identifier | WestWitteringFiles\P\2July1926-September1926\ Scan104 | |
| Date | 27th August 1926 guessed | |
| contd :- -2- compared with that of the exhaust piping and manifold, and again the gas velocity through the pipe is very low when light running which does not tend to promote good heat transference. Curve 1. therefore represents the quickest warming up we have been able to obtain with the superheated system. The difference between the two curves is an indication of the difference experienced with these systems when starting a car from cold, and in service it is quite noticeable by the longer time or greater distance necessary to travel with the super- heat system before the engine operates smoothly and the mixture control can be brought to normal. HEAT ADDED TO THE COOLING WATER. Tests were again made to determine the heat flow to the cooling water and as the apparatus used for this purpose was improved from the previous tests, the results are considered to be of a greater degree of accuracy than those given at any time before. A diagram shews the apparatus used which is simply a form of calorimeter in which any surplus steam from the hot spot is condensed and condensed water from the hot spot collected. The resulting rise of temperature of the condensing water and the mass flow (allowance being made for the temperature and mass of the supply water) gives the heat which would nor- mally be put into the engine cooling water. The results are as follows :- contd :- | ||