balance problem
#1
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balance problem
Hey guys,
Finally got this plane to fly great. But I'm confused why it is flying good. I kept adding weight to the tail, until now it seems the CG is at 50% of the wing cord!!!
Here's the initial problem. It wanted to go to the ground hands off. Inverted and level, same thing, go to the ground. Fly in a banked turn, pulls to the ground. You would think add tail weight.
In a dive, with power, or not - flys straight. In a vertical climb, with power - flys straight.
With the weight, flys ok. Without the weight, pulls to the ground with/without power.
7 pounds, 900 sq in wing
Suggestions?
Finally got this plane to fly great. But I'm confused why it is flying good. I kept adding weight to the tail, until now it seems the CG is at 50% of the wing cord!!!
Here's the initial problem. It wanted to go to the ground hands off. Inverted and level, same thing, go to the ground. Fly in a banked turn, pulls to the ground. You would think add tail weight.
In a dive, with power, or not - flys straight. In a vertical climb, with power - flys straight.
With the weight, flys ok. Without the weight, pulls to the ground with/without power.
7 pounds, 900 sq in wing
Suggestions?
#4
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Join Date: Oct 2004
Location: Niceville , FL
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RE: balance problem
Tail "volume ratio" is large enough to account for the cg position. at that cg you possibly have a lifting tail (like the telemaster). if it flys fine and dosen't balloon on landing, then there is no problem.
#5
RE: balance problem
I don't understand "pulls to the ground". What inputs are you giving when it does that? If I had a plane that was diving I would just add up trim. Then I'd roll inverted and if it required a lot of down trim, the CG would have to go back.
Tail volume is length of tail arm/wing cord X stab area/wing area. I agree with others that the tail volume looks very large because the tail arm is so long and the wing chord is fairly narrow--it's an unusual bird. What is it?
Jim
Tail volume is length of tail arm/wing cord X stab area/wing area. I agree with others that the tail volume looks very large because the tail arm is so long and the wing chord is fairly narrow--it's an unusual bird. What is it?
Jim