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Old Oct 05, 2009, 05:45 PM
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Geaux Saints
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Grafton, Il
Joined Nov 2007
1,913 Posts
Quote:
Originally Posted by sdj544
How much does the thickness of the step affect things?

I was thinking of building a FFF version of VQ models VTO:http://www.vqmodel.com/MateriePrime/...es/VTO/VTO.htm
(or a UFO or Nutball) using either KFM2 or KFM4,
but for a 32" wing I would need 1.5 inch thick spar.
That seemed a bit excessive.
Obviously I could use cf as a spar and stiffener, and then just use the fff to fill in for the height I need, but I'm not sure I'd like the look of that big of a step.
I did a rough guess that wing chord is 24" with ailerons on the plane from the pictures.

Using 0.25" foam thickness at 8% came to 1.48".
Using 0.25 for foam thickness at 7% came to 1.18" spacer.

Seems a bit much to me also.

Hopefully Dave, Jack and Steve will jump in here on this one also.

Mike
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