I increased my stub wing 11 inches on each side. My main reasons for
doing this were to increase my flap area and effectiveness and to
increase wing area due to the weight of my engine. I increased the
number of vertical pieces between the spar caps and then completed it
per plans. I then added 1/4" plywood to the rear of the main stub spar
that extends just beyond the edges of the Diehl gear attach brackets.
These brackets have been moved outside the diameter of the prop for drag
reasons so the additional plywood is almost full length of the spar.
Outer wings are stock and will be the Diehl skins. Realize you are
talking about the main structural component of the aircraft so any
change to this should really be thought about. I don't think a 1'
extension is extreme but since I am not yet flying you might want to do
a search of the archives and see what others have done.
Good luck,
Stephen
ste...@compositecooling.com

-----Original Message-----
From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On
Behalf Of bdazzca...@aol.com
Sent: Wednesday, January 25, 2006 2:42 AM
To: kr...@mylist.net
Subject: KR> Spar length

Hi Netters,

       I was wondering if anyone has extended the length of their inner
spars 
to get over fuel without adding a header tank? If so how much was added
to 
total length? I would like to add a total of 12".. Is this possible? I
would 
also be leaving the outer spars their length.


David Swanson 
bdazzca...@aol.com
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