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November 16th 04, 02:46 AM

N2EY

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In article ,
(Brian Kelly) writes:

Looks like a big challenge may be the engineering of an insulated airtight
container that doesn't weigh much.

There's no new graound here, it's more like a pile of labor than a
real design challenge. If the instrument capsule is sealed at sea
level and flown to 100,000 feet every six inch by six inch x by 3/4
inch thick patch of the foam board will have to survive a 470+/- pound
outward load. Which I doubt will work. So the capsule should be sealed
then evacuated to say 30,000 feet to get those stresses down. I can
take it anywhere from here but I ain't.

Or maybe it doesn't have to be sealed airtight at all. Perhaps all that really
matters is temperature of the components.

Sometimes dumb luck and enthusiasim gets the driveway mechanics there
faster than applied physics does.

"If it happens, it must be possible"

73 de Jim, N2EY

btw, December QST has Field Day results. W3RV/3 with second op N2EY took the
top spot in our entry class, according to the line scores.

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