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  #1  
Old 10-26-2009, 12:54 AM
beav's Avatar
beav beav is offline
 
Join Date: Feb 2009
Location: San Jose, CA
Posts: 134
Default Aileron/Flap Trailing Edge Radius Problem

I starting positioning my flaps tonight to drill the hinge to the wing and noticed that the trailing edge radii of the ailerons and flaps are noticeably different. The flap trailing edge radius is significantly larger than the aileron trailing edge radius. Here are a couple of pictures that illustrate this.





Larger pictures can be viewed at the bottom of this page: http://www.jasonbeaver.com/rv7/2009/...p-rigging.html (click on the pictures to zoom in).

I don't think I can just squeeze the flap trailing edge, because this would just bend the skins in behind the rear edge of the end ribs like this:



Is this a common problem? (A forum search didn't reveal anything, so I'm guessing not).

Does anyone have any suggestions for addressing this?
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  #2  
Old 10-26-2009, 01:44 AM
BigglesRV7A BigglesRV7A is offline
 
Join Date: Dec 2007
Location: Sale, Victoria, Australia
Posts: 97
Default Trailing edge Radius OK

Hi Jason,

From memory this is as per plans. The Flap skin trailing edge is larger than the elevator as on the underside of the flap it sits on the outside of the bottom skin. If you check the plans they are drawn to scale and reflect the difference. I discovered this at the time of fabricating my trailing edges.

Cheers, Greg
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Old 10-26-2009, 08:29 AM
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beav beav is offline
 
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Default Thanks

I had looked at all of the instructions and plan notes, but didn't see anything. I went out this morning and looked at the scale drawings though, and you're right, the radii are clearly different.

During final rigging, do most people align the top skins of the flaps and ailerons to be coplanar or to most people align the trailing edge apexes to be colinear?

thanks for the help!

jason
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Old 10-26-2009, 08:34 AM
Jim Percy Jim Percy is offline
 
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My (quickbuild) ailerons and flaps were exactly like yours. I didn't mess with them and have no regrets.
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Old 10-26-2009, 05:07 PM
Jim Percy Jim Percy is offline
 
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Quote:
Originally Posted by beav View Post
During final rigging, do most people align the top skins of the flaps and ailerons to be coplanar or to most people align the trailing edge apexes to be colinear?
jason
I can't speak for most people, but I went with choice "A".
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