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هوافضا::
رادیاتور اتیلن گلیکول
Tnis reduction of mass .flow with Increasing altitude is shown in figure 5 for a typical air-cooled engine, ethylene-glycol radiator, and oil cooler. important to observe '
Extensive literature is available relative ;to the performance of ethylene-glycol radiators in the normal range of operating conditions.
The ethylene-glycol radiator arid- the oil-cooler ducts will, however, be approximately satisfactory for all altitudes up to 40,000 feet because the variation of airplane speed approximately matches the variations of air-flow requirements, so that the patterns of the flow Into them will not have to change with altitude.
The relatively small variation vlth altitude In the requirements of the ethylene-glycol radiator, and of the oil cooler would tend to minimise the effect of the large variation of the oarburetor and the Intercooler requirements.
The lowest curve of .figure 17 shows, for example, the calculated variation with altitude of the exit area needed far the ethylene-glycol radiator duct of the typloal pursuit airplane of reference 3 at high speed.
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