ORIGINAL: FlyBlueSkies
The reason is that when you applying the monokote, the iron will heat and expand the air inside, between the ribs. With the holes in the ribs, the heated air will move into other areas of the wing and not present a problem by 'puffing' the monokote between each rib like a balloon.
... yeah, I thought about that too. I typically put smaller holes for air escape when covering. Probably 6 of one, 1/2 dozen of another. Maybe structurally it matters a tiny bit but ... whatever I'm past that now

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ORIGINAL: FlyBlueSkies
Nice pictures and great documentation of your build!
Thanks! Its the "honeymoon" phase right now, we'll see how well I'm doing come time to cover,
ORIGINAL: FlyBlueSkies
It would be great to have a copy of your outlined ribs...
Jeff, PM me and I'll shoot it to you.
ORIGINAL: Cubfloater
I couldn't help but notice that you don't have a continuous spar through the center section of the top wing. Isn't it supposed to be? I built one a couple years ago but can't remember. It looks like I see where it's supposed to be on your plan. If I'm wrong please forgive me just can't remember.
No doubt! I read that portion of the manual about 5 times. Fortunately SIG has it in bold that this is not a mistake. Also the pictures in the manual make it clear that this is the way to go. Like *JCB* said, it had me a bit "Wierded out" thinking the spar isn't solid all the way across.
ORIGINAL: *JCB*
All said and done, the center of the wing seems to be pretty strong. I still plan on fiberglassing the center section on both wings given that this plane is a real performer!
Humm ... excellent idea!