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Nov 04, 2001, 10:37 PM
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King Kong's Avatar

Shear Web?


I'm building an Explorer 2M. On the plans for the wingsThe Spar stops and the SHear Web starts. It dosn't say how big to cut the strips. It says how thick, and how long, but not how wide. This is stopping me. Please help!
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Nov 04, 2001, 11:31 PM
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Lenny970's Avatar
I can't address the Explorer specifically, but in general, shear webs fit tightly between the top and bottom spars and provide a great deal of strength to the wing. They should be a good fit with no gaps and glued securely. It's usually best to cut them slightly oversize and sand them to fit exactly between the spars. Note that the balsa grain should be vertical. Thickness of the webs near the wing root are often equal to the width of the spars, with the webs getting progressively thinner toward the wing tip.


Good luck,
Lenny
Nov 05, 2001, 07:27 AM
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Andy W's Avatar
Although between the top and bottom spar strips is best, many kits have you glue the shear webs to the sides of these stips - you can cut them a little tall, and then sand them flush (making sure not to sand the ribs)..
..a
Nov 05, 2001, 07:42 AM
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Bill Glover's Avatar
What Andy said, glueing the webs to the front or rear face of the spars is a lot less work and very nearly as good. That's what I've always done with my own designs, never had a wing fail in flight yet!

But Lenny's description is certainly the 'proper' way to do it!