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XL center section strength (was: Zenith test results)

 
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pchap(at)primus.ca
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PostPosted: Wed Nov 11, 2009 6:59 am    Post subject: XL center section strength (was: Zenith test results) Reply with quote

At 07:42 11-11-09, you wrote:

Quote:
I wonder if anyone has a different reading on this. It seems that
the only weak point anyone could really point out from the tests
that Zenith had done was that at 6+G force, the main wing bolts and
their holes were damaged although none failed.

Technically that meets the specs. At Ultimate load, permanent
deformation is allowed. The plane can get bent but has to stay together.

Whether one wants to see more margin in that area, that's another
matter. (As you brought up.)

Mind you, there is some beefing up in the "ZU" upgrade package. I'm
hazy on how all the spar and center section parts fit together, but
there are doublers added to the spar roots, and to the center section
spar where it joins the wing spars. Also, a few extra bolts hold
those doublers on, and the main wing spar bolts are lengthened. So
the bolts will have loads distributed across a greater area which may help.
Peter Chapman
Toronto, ON 601 HDS / 912 / C-GZDC


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