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I read Fred Moreno's analysis of his door frame, and I concur in many respects.
The whole door needs to be stiffened by adding Carbon Fiber on the entire inner side, as my last posting mentioned.
We were building kit No. 53, and removed the locking mechanism in favor of our own design of sliding pins. This was prior to the Lancair version of sliding pins.
When we filled the interior of the door stiffener with epoxy micro, we removed the co inspection plates of the stiffener, Carbon Fibered over them, and filled them with epoxy micro.
In the area where our pins went through the stiffener ring, we used epoxy flox to fill the ring interior, and then we bored the horizontal holes thru the ring to accept our sliding pin mechanism. We also built up a block of epoxy flox behind the door frame to accept the pin in the locked mode. This block was also surfaced with carbon fiber extending to the fuselage to give it more strength.
From my personal observation, in actual practice, 20 lbs of door seal pressure is too much. Inflate the seal until it just barely seats and blocks out the noise of the engine. If you get in the air, you can always tweak the pressure a bit.
I thought Fred's experiment was very good, and will help future builders solve this problem.
David Jones
LML website: http://www.olsusa.com/Users/Mkaye/maillist.html
LML Builders' Bookstore: http://www.buildersbooks.com/lancair
Please send your photos and drawings to marvkaye@olsusa.com.
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