Things to remember in very hot weather

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On Jun 29, 7:23 pm, Steve Hix
wrote:
In article PTV9k.157$K%2.34@trnddc02, "Mike"
wrote

There are also state-change systems that just need a heat source to
drive them, like Dometic kerosene refrigerators. Not very useful for
aircraft use, granted.

Turbine engined airplanes don't have AC compressors. They bleed
some compressed air from the compressor stage of the engine, run that
through an exchanger to cool it, then drop its pressure, which lowers
its temperature a whole bunch. Mixing this really cold air with hot
bleed air provides whatever temperature the pilot wants.
A piston engine with a larger turbocharger could use some of
the same effect but it would be less effective since the pressures are
lower.

Dan

Well...some turbine powered airplanes have AC compressors. The one I flew
had one, we used it to pre-cool the cabin and up to 18,000 feet. We also
used it as a de-humidifier when going into humid areas so the windshield
would not fog up.

--
*H. Allen Smith*
WACO - We are all here, because we are not all there.