Bille, I would NEVER rude you!
I should have paid more attn to you though. The rods look sweet and less expensive than i thought.
I'm not gonna strip anything off my foil, cause that would be more work than building a new one. But would
be interested in adding some vertical rods down the strut.
So how many? do you suggest anchoring the ends? What's best to use to fair them into the foil shape?
YEA-- i know ,
It was NOT you, but thanks for the concern !!
The rods kinda need to be added IN the lay-up, right from
the onset ; on a wooden shaped wing, they can be added before the outer skin is
The strut is where the rods mostly need to be .
From out of a female mold ,
Use + - 45 carbon fibers on each side of your rods , to distribute
the rod's strength to your lay-up. That's the direction Ya need to counter
the twisting moment anyway , so your not adding much, to what should
be there already.
For a wooden wing that needs fibers to stiffen it , the rods or rectangles,
can be stuffed in a groove made by your router ; coat them with a bit
of epoxy & high strength filler, ( the span-wise stiffening, is Done). Remember
that the closer to the outer skin you place your rods, the stiffer the spar structure
becomes, ( stiffness increases by the cube of the thickness) . So much added strength
as a mater of fact, that to get to optimum , Ya kinda need a shear-web now , but that's
what the wood shape just became. In other words, a foam core is not strong enough
to be a shear-web !
Put your outer skin at a (+- 45 deg) , to control twist.