Neutral Point and Static Margin?

[phiska]

Hiya

I'm revising for an Aerospace Dynamics Exam....

I've hunted high and low for a couple of quick definitions but can't find any!

How do i define the neutral point and the static margin of a wing?

Any help/suggestions of where to look gratefully recieved!

Thanks

Phiska

[sniffer]

Your question is about - longitudinal static stability (2D).
It is to do with the wing and the tail.
When the CG is far in front of the aerodynamic centre, then the tail needs to press down.
When the CG is far behind of the aerodynamic centre, then the tail needs to lift up.
The limit of forward and backward distance along which the CG can move about is called the static margin. It depends on the tail power.
Neutal point is the aerodynamic centre, if the CG is at this point, tail does not have to work at all.

dynamic margin is always smaller than static margin

That's all

Sniffer.

[sniffer]

is my answer useful?