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It looks like the edges were finished with flox or micro, which is fine for unloaded panels. I think you would end up with a much stronger structure than the one pictured if the inner and outer skins around the circumference were joined after chamfering the core. For structural applications my understanding is that bringing the skins together, as seen around the windows and access panels, results in a "closed" structure. Of course that doesn't guarantee that the mod is strong enough, just that it's as strong as it can be.
--Dave Saylor
On Thu, May 3, 2012 at 5:28 AM, Lancair <lancair-esp@ustek.com> wrote:
I installed the A/C for my ES-P by cutting three smaller holes trailing
aft and bonded a plenum over them for better airflow and strength.
Photo attached.
Robert M. Simon
ES-P N301ES
-----Original Message-----
From: Dr. Weinsweig [mailto:weinsweigd@tsnci.com]
Charlie, I agree that it must seem obvious to anyone who has been
involved in building a IV that the area of the fuselage behind the gear
doors where the A/C holes that you reference are made has to be the
weakest area of the fuselage. We installed Mike Custard's vertical fin
extension to give better yaw stability(in addition to the strakes) on my
propjet and unscientifically to my eye, this seems to beef up this area
though from the top rather than the underside. If any structural
testing takes place I think that this modification should also be tested
to see if it helps. Thoughts?
--
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