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Old 03-29-2015, 07:15 PM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 7,644
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Quote:
Originally Posted by cccjbr6 View Post
I would think and extra 18 inches of wing span would increase useful load somewhat.
If you are assuming that the gross weight is based on meeting a minimum climb rate (like in FAR23) that would be true, but RV's have never had any problems meeting the common minimum performance requirements.

Quote:
Originally Posted by Bubblehead View Post
Be careful here. Extending the wings increases bending moment at the root, and increasing load will do the same (plus increasing shear load).
This would be the main reason to be careful.
If you increase the span you would automatically increase the bending moment slightly (longer lever arm), even if you used the same max. gross weight value.
If you increase the span and increase gross weight, the bending moment on the wing goes up even more.
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Scott McDaniels
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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