Cal, He is referring to the 70% of the wing chord in spite of where it's
drawn
LeRoy Cordes YOLO
Chicago, Illinois
AMA 16974
In God We Trust
On Fri, 27 May 2011 19:17:38 -0000 "calgoddard" <calgoddard_at_yahoo.com>
writes:
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> Cezar Banks' LPP plan says the CG should be at 70%. How is that
> calculated? I know he recommending the center of gravity of the
> airplane (with the rubber motor mounted) should be a certain
> distance from some reference point that yields the specified
> percentage. What is the reference point? The wing has a five inch
> chord and he shows the CG at about three inches behind the leading
> edge. But that does not yield 70% in terms of a fraction.
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> --- In Indoor_Construction_at_yahoogroups.com, "Mark F1diddler"
> <f1diddler_at_...> wrote:
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> > --- In Indoor_Construction_at_yahoogroups.com, "calgoddard"
> <calgoddard_at_> wrote:
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> > > Mark:
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> > > Thanks for the explanation on the wing post height.
> >
> > You're welcome, but that was only an explanation of common
> practice, not the merits of long vs. short posts. Hoping someone
> else will chime in about the theoretial advantages (or tradeoffs,
> usually.)
> > MB
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> Yahoo! Groups Links
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LeRoy Cordes YOLO
Chicago, Illinois
AMA 16974
In God We Trust
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Received on Sat May 28 2011 - 07:19:16 CEST