Re: LPP

From: calgoddard <calgoddard_at_yahoo.com>
Date: Fri, 27 May 2011 19:17:38 -0000

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.

--- In Indoor_Construction_at_yahoogroups.com, "Mark F1diddler" <f1diddler@...> wrote:
>
>
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> --- In Indoor_Construction_at_yahoogroups.com, "calgoddard" <calgoddard@> wrote:
> >
> > Mark:
> >
> > 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
>
Received on Fri May 27 2011 - 12:18:51 CEST

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