This is a two rotor of course but the same ideas apply
   to a 3 rotor. Comments anyone? See any problems?
   --
   Paul Lamar ...No rotor no motor.

Paul,
Doesn't the snubber/shock absorber require a triangulation for vertical
forces? It seems like any input would bend the small tubes holding the
"ring" at the back. The other thing I'm wondering about is, does the 20B
balance farther rearward? It would seem that it would have to with the
additional weight. That would require a stronger rear engine mount or a
different front mount.
Bill Jepson


That rear beam will easily take the load of a 20B. Don't forget the thrust
counter balances the static weight on the rear beam seeing as how the thrust
line is above the front main bushings. To triangulate that point would require
a bird gage of tubes. I'll upload an analysis of the stresses on the rear beam shortly
based on a download of 6 G's or about 600 pounds.