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Hello,

Living in Houston, with its well deserved reputation for steam sauna
Summers, I've been following the discussion on air conditioning options,
concepts, and justification with high interest.

A fellow pilot has suggested that air conditioners aren't really needed
because of the short time required to get airborne and climb to a cool
cruise altitude.  I'd like to offer a contrary "design reference mission".
I expect more than half of most pilot's flights to be local with landing
practice, maneuver practice, sight-seeing tours for friends, or just flying
around.  This kind of low altitude flight doesn't get you much temperature
relief in the Summer in hot areas.  So, everyone working on air conditioning
concepts please don't stop.  There are customers out here eagerly looking
for them.

I'm hoping to find an effective system for a Legacy with a weight penalty
under 30 lbs.  Even better would be something portable so that the weight
penalty could be a flight by flight option.  It looks like the consensus on
Peltier based systems is that they just require too much power.  Has anyone
considered a liquid nitrogen based system?  How heavy is a typical
freon-compressor system implementation?  Has anyone calculated the needed
capacity?  I've heard about 20,000 BTUs of max capability is about right...
Thoughts, opinions...?

Thanks,

Valin Thorn
Legacy Depositor 75

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