Guy Maniscalco wrote "Now that the spars are built, we found that the
brackets are exactly the same width apart on both the center spar and
the outer spar."
-------------
The "new airfoil" template drawings only show the dimensions for the
main spar (stub wing to stub wing), and the outer wing tip, because this
is all you need to define the airfoil and sand the foam to that shape.
The actual spar thicknesses (front to back) are the same as the
KR2/KR2S, which is where RR expects you to find that. It's on page 20
of the "Rand Robinson Construction Manual for KR2". The KR2S plans
drawings W1 "Spar Details" only say to use the same dimensions as the KR2.
I guess I could see that coming when I built N56ML, so I made the outer
spar just thin enough to align with two "inner" wing attach fittings.
This is just another thing in the plans that was simply missing, and
should be corrected....another goal of the FreeBird project. See more
on my wing attach fittings at http://www.n56ml.com/owings.html . As Rob
said, a few more layers of plywood are the way to fix that if you made
inner and outer spars the same thickness, and that's completely
understandable.
Also, I should point out that the very outer wingtip (past the spars) is
just foam, sanded to shape using the complete outer wings skins as a
sanding guide., and then fiberglassed (or carbon fibered, in my case).
See http://www.n56ml.com/900hour/ for more on that.
Mark Langford
m...@n56ml.com
http://www.n56ml.com
Huntsville, AL
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