Center of gravitation... Who know????
10-25-2002, 10:03 PM
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Center of gravitation... Who know????
Who can help?
How defina to detrmine center of pressure (CP) of delta wing of Autokite?
or more concretic: where located center of gravitation (CG) of delta wing Autokite?
No hobbies co, no kyosho don`t know it.
May be enybody know articles about it?
Thanks
Felix S. taras
How defina to detrmine center of pressure (CP) of delta wing of Autokite?
or more concretic: where located center of gravitation (CG) of delta wing Autokite?
No hobbies co, no kyosho don`t know it.
May be enybody know articles about it?
Thanks
Felix S. taras
10-29-2002, 07:26 AM
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Location: Chilliwack, BC, CANADA
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Center of gravitation... Who know????
Sorry Felix. Your english makes this hard to help. But I'll try.
If I understand you are trying to find the balance point for a delta wing model. A good place to start will be to calculate the wing area. Then position the balance point so that 25% of the area is in front and 75% is in back. This is a starting point only. Depending on your airfoil and how wide your tips are you may need to shift it back or forward 5 % or so.
The best way to find out if this is right is build a small sheet balsa glider version of your model and try it out. Make the wing flat and just bend up the rear edge a little for the reflex. Test glide it and watch how it stalls or recovers. Once you get it so it flies well then test the balance position and copy that to the full size model.
I'm sure there is a more complex way using the mean aerodynamic chord and all but I suspect that this will give you a good starting point.
If I understand you are trying to find the balance point for a delta wing model. A good place to start will be to calculate the wing area. Then position the balance point so that 25% of the area is in front and 75% is in back. This is a starting point only. Depending on your airfoil and how wide your tips are you may need to shift it back or forward 5 % or so.
The best way to find out if this is right is build a small sheet balsa glider version of your model and try it out. Make the wing flat and just bend up the rear edge a little for the reflex. Test glide it and watch how it stalls or recovers. Once you get it so it flies well then test the balance position and copy that to the full size model.
I'm sure there is a more complex way using the mean aerodynamic chord and all but I suspect that this will give you a good starting point.
