Linked Questions

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votes
3answers
895 views

What are the disadvantages of a Tail providing lift? (tandem-wings included)

Most aircraft feature the tailplane configuration, which requires the main wing to provide higher lift than the weight of the plane itself, what seems counterproductive. Few aircraft have featured ...
1
vote
3answers
979 views

What is the relationship between centre of gravity, centre of pressure and pitch?

Ok so I've got a couple of questions regarding CG, CP and pitch 1) When the aircraft is taking off, is the tail down force required to pitch up the aircraft high? Because the aircraft always has a ...
0
votes
4answers
1k views

Does an rc plane tail also have airfoil or is it just flat material? [closed]

I've chosen an airfoil for the wing, now i'm confused weather i should do the same for tail or just attach a flat piece of wood as tail. I'm going for conventional tail design. This is my first ever ...
2
votes
1answer
958 views

Why does pitching moment coefficient decrease with an increase in the angle of attack?

Slope of Cm vs alpha graph is negative, why it is so? The attached graph is from https://en.m.wikipedia.org/wiki/Pitching_moment , this graph is for cambered airfoil, as pitching moment is zero for ...
1
vote
1answer
1k views

How to calculate the location of C.G. A.C. & N.P. in static longitudinal stability?

We are in the conceptual stage of design and, using Raymer & Nicolai as references, I am doing a rough calculation of "power off" neutral point (N.P.) to find the optimum c.g. and a.c. positions. ...
4
votes
2answers
165 views

Calculate pitch balance of RC glider?

Today, I played with styrofoam gliders with my kids; I made an asymmetric wing, asymmetric horizontal tail, symmetric vertical tail, and attached these to one stick for the fuselage. I've had big ...
2
votes
1answer
81 views

Tailplane/Equilibrium conditions [duplicate]

In regards to achieving equilibrium conditions, what is the relation between airspeed and the tailplane?

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