In a message dated 8/13/02 5:08:06 PM Eastern Daylight Time,
clevelee@cswebmail.com writes:
<< This technique has been done on older, and even some not so old, certified
aricraft. The biggest challenge you'll have is in not damaging the
plexiglas. A
dull hole saw with very conservative pressure in the drill press would likely
work well. Certainly a reasonable and lightweight approach to cockpit
ventilation.
Aircraft Spruce and Wicks, and possibly Airtex may carry the rotating vent.
>>
I used a fly cutter in a battery powered drill going very slow to do this
once in a Challenger ultralight. (Wouldn't do it on my Europa though, I have
other plans) It had 1/16" lexan (perspex). You should drill a 1/8" hole and
use a smooth drill rod in the flycutter instead of a drill bit. Turn the
cutter around and let it rotate backwards so it doesn't dig in too
aggressively. Go very slowly leaning the cutter as necessary if you're
working on a curved surface. I cut two without a hitch. You may want to
practice on a piece of scrap before the good stuff.
Troy
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