Hinges under stress - mechanical engineering type question

Ernest Christley wrote in message r.com...
Corrie wrote:

Ernie, what's the Delta stressed for? I perused your site, but didn't
see an illustration of the spar attach fittings. A half-inch pin
sounds right. But what kind of fitting does it go through, and how is
that fitting tied into the spar? That's the real question.


Normal category. 1950lbs gross.

I just put a couple pictures and and explanation at the bottom of the
'Frame' section of my website. Follow the link below.

Tell your lovely wife 'thank' for helping out. I'm afraid it's still
not entirely clear, but it looks like the whole structure hangs on
those two 1/4" fittings welded to the spar truss, inserted into the
vertical hinge tube, and held in place by the 1/2" pin? Make certain
those are solid welds, my friend!

Ernest Christley wrote in message ...

Are you kidding me? The only reason that it hasn't been done yet is
that I'm scared of it.

Truth is that there'll be about 12 linear inches of weld on top and
bottom when all is said and done, but I'm wanting to make sure those are
the nicest 12" that I've ever welded!!

Lay that bead down as though your kids' lives depended on it. I'd be
a tetch skeered, too.