CG for .40 Midwest Corsair - RCCanada - Canada Radio Controlled Hobby Forum
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Old 11-01-2011, 07:42 AM   #1
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CG for .40 Midwest Corsair

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I have recently aquired a midwest .40 sized Corsair as a gift. I was wondering if anyone could tell me what the Center of Gravity might be for this aircraft.

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Old 11-02-2011, 10:11 AM   #2
Thunder Chicken
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Re: CG for .40 Midwest Corsair

General rule of thumb......25-35% of the MAC (mean aerodynamic chord)
Figure out the average chord length.....leading edge to trailing edge.
Measure back from the leading edge 25-35% of that. I'd set the CG to be a little closer to 25-28% at first and see how if flies. Move a battery around (or whatever weight you easily can) to change the CG until it flies that way you want it to!
But since the corsair wing is not a perfect 'hershey bar' type of wing with a constant chord it may be a little more difficult to get the MAC. I'd set the CG pretty well on the spar, or the thickest part of the airfoil and fly and adjust from there.
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