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Pitts S1C Weight and Balance

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mig17jet

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I know this is an old topic, but does anyone have a reliable W&B sheet for an S1C along with a CG envelope or its equivalent?

On the original S1C plans, the CG range is given as +1 to -4.6 with no comment as to what this means. The plans do specify the lower wing leading edge as the datum, so one can assume the numbers are relative to this datum. If anyone can clear this up, that would be appreciated, too.

Thanks for any comments or suggestions.
 

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