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).
Experiments investigating a proposed superheated system and its effects on engine cooling, specifically the rate of heating from cold.
| Identifier | WestWitteringFiles\O\2January1926-March1926\ Scan84 | |
| Date | 12th February 1926 guessed | |
| contd :- -4- engage top gear when starting away with a cold engine. The above however puts forward some of the difficulties encountered in endeavouring to give a quantitative determination of the relative merits of the systems. A disadvantage which under certain conditions it would be possible to experience with the proposed superheated system would be the addition of heat to the cylinder jacket water. It has therefore been our aim to discover if we could get a sufficient rapid rise of temperature from cold without adding to the work of our cooling system when operating at full load, in which case the heat supply to the boiler would be greater than when running light. All the following experiments have been conducted with the one size of boiler only. The capacity was kept quite small 11.3 cu.ins. and the actual heating surface in contact with the exhaust gas was 75.4 sq.in. RATE OF HEATING FROM COLD WITH VARIOUS WATER FLOWS. Below are given curves which show how the average hot spot heating medium temperature - i.e. the mean of the inlet and outlet temperatures - is affected by the rate of water flow. We were able to vary the rate of flow by means of a tap in the system arranged as shown on the sketch. The rate of flow was afterwards determined for the different tap positions used during the tests and are written against each curve. In order to obtain a better comparison we have given the temperature rise relative to the temperature at the start of the test as it was found difficult to always obtain the same initial temperature. contd :- | ||