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.