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Message
Eric, Jerry,
Ron,
My neighbor Don
Saint spent some time banging me in the head with a 2x4 last night. He
explained my errant thinking regarding the interrelationship of the CG and my
horizontal stab incidence.
His comments
clarified that as we push the CG aft toward the neutral point (CG
collocated with center of pressure) control forces with decrease.
Additionally, speed with increase.
The unique fact that
my elevator is sitting a touch tail low at high speed is roughly unchanging as
the CG is moved aft. This bit of drag could be reduced also in a separate
discussion. That is, the H.S. could be chopped out and reinstalled with a
slightly higher leading edge.
He described some
very interesting neutral point analysis. It seems the neutral point can be
easily extrapoloated with minor CG shift studies (spring scale and a
couple 25 lb shot bags).
I am looking forward
to at least doing this analyis with Don and perhaps considering a CG
adjusting system. Of course this system while appoaching the neutral point
will NOT exceed the aft design CG of the airframe. My CG is now very far
forward. Don routinely races 1" forward of his neutral
point.
I hope my confused
thinking originally about this whole topic hasn't mislead
anyone.
Larry
Henney
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