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Old Jan 20, 2012, 02:19 PM
granada don is offline
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life long racing nut & modeler
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Granada Hills Ca.
Joined Nov 2009
2,092 Posts
Your Main Spar is your wing, put in some shear webs to build a C-spar - I Beam - or a Full Box spar. Like Quick says at least a C spar.

Your 12" cord wing will never know the difference in the weight of some balsa pcs for a lot stronger wing, if you don't put them and you fold the wing pulling out of a dive you will feel really bad that you did not do a little extra work.

Maybe a 3" - 3 1/2" rib spacing too as 4" might be a bit much.

Better to be safe than sorry and fly another day!!

G Don
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