Wing CG help please
 

hello people
im new to this forum i was looking for a forum where someone might be able to help me with some work please.

i got some work to find CG(x) of a wing. Ive attached a image of the
info given what i wan to work out is on the second link the CG(X) of the wing. If u can help i would be very grateful. ive been trying to figure it out for ages.[sm=drowning.gif]

Thanks in advance people.

RE: Wing CG help please
 

anyone

RE: Wing CG help please
 

For a multi-panelled wing, use this method>
http://perso.wanadoo.fr/scherrer/mat...glish/mce.html

RE: Wing CG help please
 

thanks for the link but do u know any eqaution u can use to find it out like a step by step method at all

thanks

RE: Wing CG help please
 

i need to find the CG of each section i dont know how to do it i cant seem to get the numbers for CG in the first table on the second image.

RE: Wing CG help please
 

The basic method for a multi-panelled wing is illustrated at:
http://home.earthlink.net/~pjburke1/cg.htm
But the previously linked site is the best source.

RE: Wing CG help please
 

Using the process at the Etienble site, it looks like this..
There's no real need to get any more complex, for a model.

RE: Wing CG help please
 

thanks for that very helpful. [sm=thumbup.gif]

RE: Wing CG help please
 

Naz, what do you mean exactly?
You want to know where the wing CG is? You want to weigh all the bits, the skins, ribs, stiffeners that go to make up the wing to find its centre of mass? what on earth for?

seems a very strange request.
Alasdair

RE: Wing CG help please
 

Sorry guys, I just looked up the website Tall Paul quoted and realised that the question is nothing to do with CG at all. What Naz wants is to calculate the wing's Aerodynamic Centre. Nothing to do with weights or mass or gravity. Right.

I downloaded the program from the website and tried it. It didn't work at first when I left the "centre position %" box blank. I thought that was something it calculated. Eventually I realised that it wanted me to put in 25%, the usual position of the AC on the MAC. Now I get it.
D'oh!

Good work Tall Paul.
Alasdair