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more bending of the vertical horizontal braces

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GrummanDude

Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA

Posted: Wed Apr 08, 2009 9:07 am Post subject: more bending of the vertical horizontal braces

I found some more bending of the vertical braces.  I can't, for the life of me, figure out what makes it bend.  The stub spar is rigidly attached to the horizontal and the horizontal is pretty stiff in that are.  I can't picture how it would bend.  I mocked up this donor plane I have and I can't see how it could possible bend . . .  especially enough to deform those vertical braces.  I'm getting close to having enough time to bond the new braces I designed into place.  Calculations show the vertical braces to be 200% stiffer.  Plus the material is a lot less prone to cracking; i.e., 5056-H3.  The horizontal brace I designed is about 600% stronger.  My parts have more in common with the original AA5 horizontal (forward) attachment than the later design.   

 

  I'm also using the donor plane to see if a tail dragger is feasible.  

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