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<< Lancair Builders' Mail List >>
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Brent, I always appreciate your posts and insights into tough problems.
How did you couple the hose on your compressor to the air mixer box on your
ground testing? One thing to think about is that 7.5psi in the cabin on
the ground is a much smaller pressure differential than flying with a
5psi cabin pressure with an outside density altitude of 29,000'. You
would probably have to pump the cabin pressure up higher than 7.5psi to
really simulate flying in the flight levels. John Wright iv-p Colorado
Springs
-----Original Message-----
From: Brent Regan <brent@regandesigns.com>
To: Lancair List <lancair.list@olsusa.com>
Date: Thursday, April 27, 2000 10:15 AM
Subject: Re: LNC IV-P window blow-out
I have a little advice for IV-P builders/owners out there regarding the
cabin door window. My comments are based on my personal experience and
common sense. Unfortunately, I am an idiot so you must discount everything
I
say and figure things out for yourself.
Here we go:
The windows in the IV-P are like the skin of a balloon, tough and flexible,
but if you apply the right stress at the right place they will to the test
pressure. To any IV-P pilot out there who has done this I have one
question.
Are you freaking nuts?
FAR 23.1428 calls for proof pressure testing to 1.5 times the normal
operating pressure. This is not a requirement for the builder but I think
it
is a good idea. Perform the pressure test prior to painting the a
Regards
Brent Regan
LML website: http://www.olsusa.com/Users/Mkaye/maillist.html
Builders' Bookstore: http://www.buildersbooks.com/lancair
Please send your photos and drawings to marvkaye@olsusa.com.
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