Well, first the Aspire is not 100", it's 2M. Second, if the spar system
isn't up to it, there's no point in a killer wing rod. THird, he didn't
say winch proof. On a 2 meter, I know from experience that 7/32 is not
too bad. Piano wire of that dia is ALREADY hard. An Aspire is hardly a
contest machine.
Bill Harris wrote:
>
> Assuming a music wire wingrod and 100" wingspan, that 7/32 joiner will
> withstand 15 pounds of winch load. A fairly weak launch load, you should
> try for 20-30 pounds for casual sport flying, more for competitive flying.
> Check the Archives for our recent discussions on wing design, etc.
>
> If you can squeeze it in, try for a 1/4" of 5/16" wingrod, of hardened
> steel. If 3" is all you can insert it into the wing, so be it-- just make
> sure that your joiner boxes are strong. Else, use a joiner rod bent to the
> wing's dihedral angle, so you can get more insertion.
>
> Check the Allegro plans at the Charles River RC site-- this gives excellent
> suggestions on how to build a winch-proof foam wing.
>
> http://www.charlesriverrc.org/articles/allegro2m/markdrela_allegro2m.htm
>
> --Bill
>
>
>
> >From: "Bill Conkling" <[EMAIL PROTECTED]>
> >To: <[EMAIL PROTECTED]>
> >Subject: [RCSE] Wing rod
> >Date: Tue, 24 Jul 2001 00:07:01 -0400
> >
> >I'm building a new wing for my Aspire out of foam/balsa. I plan to
> >use a rod in the center to make a two peice wing as I can't easily
> >carry a one peice wing in my car. I am planning a 7/32 rod, and about
> >3 inch insetion length in each panel. Is this enough? Any comments?
> >Please??????
> >
> >I'm running out of thickness between the spar caps with the foam cores
> >and I don't want to cut into the caps if I can help it. I might be
> >able to cut into the bottom of the top cap at the center without much
> >harm. I can add a fibreglas triangle to the top and bottom of the
> >wing over the spar under the sheeting. I can also add carbon tow to
> >the spars.
> >
> >
--
Lincoln Ross
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