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RE: FAA spec

Posted by unclestu (D) on March 23, 2014 at 15:59:08

In Reply to: FAA spec ? posted by Tweaker456 on March 22, 2014 at 12:23:33:

IIRC, and I may be wrong, originally all the branches of the military promulgated their own specs. Army Air Force had slightly different specs for their acquisitions from the Navy, etc. Eventually they were all merged into JAN specs: Joint Army Navy. I believe FAA specs were incorporated into the JAN specs. I somehow remember them as being instituted in WWII however. It could be that the FAA had specialty requirements not covered by JAN specs.

Occasionally, I find chokes and transformers built with altitude ratings. These were obviously for air craft use although I do not know what danger there is for a potted transformer at altitude (maybe the potting might leak out ?). I do know the 5R4WGB rectifiers were originally designed for use on high altitude air craft like the B-52's, which is probably why they are built like a tank, to handle the extreme changes in pressure. And then there are the Bendix tubes with their ceramic spacers able to withstand the g forces of a ICBM....

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