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Forum: Tech Log

13th Jan 2011, 18:26

Replies: 52

Aerodynamic Center

Views: 40,163

Posted By Microburst2002

Thank you, proffessor LM for wasting your...

Thank you, proffessor LM

for wasting your valuable time with us

nice pic

Forum: Tech Log

12th Jan 2011, 16:51

Replies: 52

Aerodynamic Center

Views: 40,163

Posted By Microburst2002

I know, but many times the physical meaning of...

I know, but many times the physical meaning of something is lost while making it easier to be calculated mathematically.
This is what happens in this case, to me. I can't see through the equations....

Forum: Tech Log

12th Jan 2011, 15:47

Replies: 52

Aerodynamic Center

Views: 40,163

Posted By Microburst2002

Thank you Keith Now I start to understand...

Thank you Keith

Now I start to understand better.

So we are substituting
Lift-acting-at-the-CP by
Lift-acting-at-the-AC-plus-a-pitching-moment (which is convenient because it is constant...

Forum: Tech Log

12th Jan 2011, 15:25

Replies: 52

Aerodynamic Center

Views: 40,163

Posted By Microburst2002

From what I read on the books, I understand that...

From what I read on the books, I understand that the Lift of an airfoil can be thought of as the sum of the upper Lift and lower Lift.

In symmetrical airfoils, both upper and lower Lift always act...

Forum: Tech Log

12th Jan 2011, 10:47

Replies: 52

Aerodynamic Center

Views: 40,163

Posted By Microburst2002

I must have somthing wrong in my brain but I...

I must have somthing wrong in my brain but I still don't get it.

Is it correct if I say that the aerodynamic moment is the moment of the Lift force about a point?

Forum: Tech Log

11th Jan 2011, 10:20

Replies: 52

Aerodynamic Center

Views: 40,163

Posted By Microburst2002

Still puzzled about it. Is the aerodynamic...

Still puzzled about it.

Is the aerodynamic moment a "theoretical" thing?
¿Can we use any point of reference we want?

Let's assume an airplane with the CG exactly in the CP, in trim, steady...

Forum: Tech Log

8th Jan 2011, 13:25

Replies: 52

Aerodynamic Center

Views: 40,163

Posted By Microburst2002

The point about which we choose to take moments...

The point about which we choose to take moments is not an irrelevant thing.

We choose one point or another for a reason.

We can try to find about which point a given force has zero moment. If...

Forum: Tech Log

8th Jan 2011, 09:01

Replies: 52

Aerodynamic Center

Views: 40,163

Posted By Microburst2002

Hi, CliveL I think I understand what the CP...

Hi, CliveL

I think I understand what the CP and the AC are, at least for practical purposes. Basically the first is where Lift can be considered to act, the second is where changes in Lift can be...

Forum: Tech Log

7th Jan 2011, 17:11

Replies: 52

Aerodynamic Center

Views: 40,163

Posted By Microburst2002

Let my try: When a number of forces are...

Let my try:

When a number of forces are exerted on different points of a body, the net effect of all those forces on the body (both lineal and angular) is the same as the effect of a single...

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