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Bob:<br>
Actually, a square section turned on edge, making a diamond, would
probably offer more strength. Dick Hanson offered an idea that I found
appealing:<br>
Cut a strip of plywood, 1/16 or 3/32 in, long as the tube. Cut it so
it will just slide inside the tube snugly. Slide it in, on edge,
sitting vertically. (The plywood sitting vertically, not you!) You
have now added a whole lot of strength to the tube. You've prevented
collapse/bending of the walls, and increased the modulus of bending.
Works well. If I were one of the folks bending wing tubes, I wouldn't
hesitate for a moment to try it. <br>
Bill Glaze<br>
<br>
Bob Richards wrote:
<blockquote
cite="mid20050128133036.92291.qmail@web30202.mail.mud.yahoo.com"
type="cite">
<div>I'm sitting here thinking that "tubes" are not the best cross
section for our purposes. I think we only use them 'cause they are
easy. It would make much more sense from a structure standpoint to use
something like a box or I-beam.</div>
<div> </div>
<div>Bob R.</div>
<div><br>
<br>
<b><i><a class="moz-txt-link-abbreviated" href="mailto:rcaerobob@cox.net">rcaerobob@cox.net</a></i></b> wrote:</div>
<blockquote class="replbq"
style="border-left: 2px solid rgb(16, 16, 255); padding-left: 5px; margin-left: 5px;">Yeaop.
That works out to about 147 lba (assuming a 10.5lb plane) distributed
on that 7/8" dia wing tube, with complete concentration of the G's
likely at the fuse/wing root intersection, with some load distribution
laterally, but I'd bet not much.<br>
<br>
How many of us ever "test" our wing sockets to 150 lbs!!!!<br>
</blockquote>
</blockquote>
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