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Old 11th Dec 2012, 20:24
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Bluescan
 
Join Date: Nov 2008
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Question Aerodynamical center

Good morning all,

I have my FAA CPL and I'm working to convert it into a JAA ATPL. However, the Oxford books are talking a lot about aerodynamical center.
I think I've understood the definition, but I'm not completly sure about the use.

Especialy when the illustrations show's both lift from the wing AND tailplane.

When working with CP (center of pressure) and CG, the CP usally is aft of the CG. But on these illustrations, CG is between the wing AC and the tailplane AC, and they are both producing positive lift.

Both Lw and Lt on this illustration ground in their respective AC.
The CG also seems to be far aft of normal?






This is what I'm used to:



All help is appriciated (and I hope this is the right forum :-) )
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