Thread: Changing pressure area wings

Hi everyone, I heard that the same way you can change the CG putting weight on the back you also can change the area of pressure of the wing lowering the flaps or steeping the nose like "speeding up the plane". That if you lower the flaps you will change the wind pressure aft of the wing. So my question is: What will be the benefit or wend will be useful to change the center of pressure?
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For what reason do you want to do this? CG isn't much an issue for the CT.

I know CG isn't much an issue for the CT . But I saw on the king school DVD of this topic and just wanted to know what will be the use of changing the wing pressure area of any airplane.

Personally I don't know of a good use for us, maybe someone else can help enlighten us both.

Originally Posted by josetimbal

what will be the use of changing the wing pressure area of any airplane.

there is no USE to it.....it just happen...when YOU CHANGE the pitch of the wing (angle of attack)

An aircraft loaded with a aft CG is a bit more efficient in cruise due to the reduced tail down force required to maintain level flight. The center of pressure of an airfoil is typically located slightly aft of the center of gravity which causes the nose to pitch down, therefore the need for the tail down force generated by the stabilator. If less down force is required (effect of added weight) the aircraft will cruise a bit faster. Of course you should not exceed the aft CG limit or you will sacrifice stability and the ability to recover from a stall condition.

The Wright Bros, and Burt Rutan have had it right all along, a Canard is the way to go, then you have two lifting surfaces instead of just one.

Eric

coppercity thank you for your great info.