Recent content by Marco9518

That was my idea. The problem now is this. I need to move from the nose (0 0 0) to the mast of the helo, which is located at (2 0 2.4) meters. Assumig i want to keep my problem 2 dimensional so i can use just the charts of Fx and Mx. What distance do i calculate as O' - O? 2 meters (the...

Unfortunately i cannot give informations but this is what it looks like. I have one of these charts for Fx,Fy,Fz,Mx,My,Mz

Here is the theory. It is in italian but math is still valid..

It is not possible to do any other analysis. The picture is already a semplification of a real helicopter fuselage. The thing is i need forces and moments measured with reference to the mast but I jusy can't do it because the analysis has been made by the manufacturer

R is defined as the summation for "i" that goes from 0 to N of F(i). But i am not very sure if i can use the forces coming from the CFD. The law that i wrote in the picture is one of the basis in mathematical physics but it seems like nobody is able to apply it, including me obviously.

It is the law used to change the pole of the moment. The problem i think is just R which is defined as the summation for "i" that goes from 0 to N of F(i). But i am not very sure if i can use the forces coming from the CFD.

I did not draw forces but only because i wanted to focus on the moments. What i have is basically a chart that says for, every angle of attack, the value of the forces and the moments acting on the 3 axis, in the Oxyz frame of reference.

Oh yes for sure! I am just not very good with the language but I was talking about moment!

Good morning everyone! I am an aerospace engineering working on my thesis and i am trying to solve a little problem. In the picture you can see an "aeordynamic" body. The CFD analysis gives me the forces and the moments acting on this body. How can i calculate the momentum acting on the body...

This forces are not in form of coefficient. What i have is for example: at 0 deg of angle of attack the Fx is 5N, at 15 deg is 20N and so on.

So, basically i need to validate a simulink model that gives me forces and moment acting on the fuselage of an helicopter, given speed, angle of attack and angle of sideslip. There are no rotors, no appendices, nothing but the fuselage. The model needs some coefficients. The CFD analisys gives...

Thanks, but I was talking about aerodynamic forces Hi! i thought about that! I just think that, being this a mathematical/physical problem, would be more helpful to post it here. Do you think it is possible to have it in both sections?

Thanks, but I was talking about aerodynamic forces.

Good morning! I know this may sound a little odd, because there is a theorem regarding it, but i have this question. Basically, a CFD analysis gives me the value of the forces and the moments, as a function of fuselage's orientation, in a particular frame of reference. How can i calculate the...

The way i formulated it, it represents the angle between the direction of the flow and an ipotetical "chord" that goes from the nose to the tail of the fuselage.