Date: Sun, 18 Jun 2000 11:39:36 -0700
From: fmoreno4@postoffice.pacbell.net
Subject: OSH and LIV/ES doors
To: lancair.list@olsusa.com
Reply-to: fmoreno4@pacbell.net
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References: <20000618044835.AAA2790@ns1.olsusa.com>
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Jim, I would be willing to talk again.  Just need to figure out what to talk
about.  Could discuss the long range tank project with John Forker, if folks are
interested.

Just got back from visiting the factory, and can confirm new door option.
Discussed with Doug at length, saw the prototype, nicely done, all assembled and
ready to bolt in, piece of cake. Also, the non-P will have two latches at bottom as
noted earlier.  Pins eliminated.

My door on my non-P is done, and uses pins since that was the only option then.
However, in learning about door deflection due to seal and also due to low external
pressure compared to the interior (about 30 pounds per square foot, I estimate) I
beefed up the door frame with a lot of unidirectional carbon which greatly
increased stiffness since the door frame and door itself are made up of carbn on
the bias which is much less stiff in bending, but great in shear.  In my scientific
test, I put the door on the floor, stood on it, and measured the deflection which I
recall was in the vicinity of 3/8 to 1/2 inch (I weigh in at 200, wet).  After
addition of unicarbon in various locations and multiple thicknesses, deflection was
less than 1/16.  I think this will solve the problem with the pins, but the new
factory solution is better.  If any are interested in how I did the detailed
reinforcement, let me know and I can make some sketches.

F

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