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Vent hole in butt rib?

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Manuel Benito

Well-Known Member
Aug 20, 2006
Reaction score
Hi you all,

I am making all ribs for my Skybolt. In upper and lower wing the space between spars is all covered with 1/16 plywood. My question is if I need to drill/drain holes in lower bays of rib before I close it with the other ply?

I enclose photo so you can see the blue points where I am thinking of drilling.

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