450 Trex 450 sport FB center of gravity problem.
- Thread starter Bruno
- Start date
Island Breeze
Senior Rc-Help Member
I always hold the blade grips verticle and the heli horizontal..that should give you a good COG. Hurry and take the pic, this bird is heavy..lol
Tony is right..COG is not as important but great to have it centered, especially if you love to hover. it is important though if you are doing some 3D either that or have some awesome collective management.
Tony is right..COG is not as important but great to have it centered, especially if you love to hover. it is important though if you are doing some 3D either that or have some awesome collective management.
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Tony
Staff member
That heli is bigger than you are lmao.
What my point was with my point is, the heli can over come the CoG issue. Since you can put force on any part of the disk when it's spinning, it's easy to correct. Lets say it's nose heavy, you can add back cyclic to force more air down on the front and up on the rear. It will still hold it in a hover and stil be stable somewhat. However, if you get a gust of wind, translational lift will take over and it will start pitching to the back.
As stated, it's best to have a perfect CoG, but a little out isn't going to hurt anything. I just checked my 450 for the first time when I read this thread, and to my surprise, it's dead on lol.
What my point was with my point is, the heli can over come the CoG issue. Since you can put force on any part of the disk when it's spinning, it's easy to correct. Lets say it's nose heavy, you can add back cyclic to force more air down on the front and up on the rear. It will still hold it in a hover and stil be stable somewhat. However, if you get a gust of wind, translational lift will take over and it will start pitching to the back.
As stated, it's best to have a perfect CoG, but a little out isn't going to hurt anything. I just checked my 450 for the first time when I read this thread, and to my surprise, it's dead on lol.
Island Breeze
Senior Rc-Help Member
Slobberdog
Well-Known Member
Wow it took me a while to figure out why so different results, try holding the flybar across the heli not inline with it, then see what result that brings.
In that orientation ( with the flybar perpendicular to the boom) the servo configuration prevents free movement of the heli. I am holding the fb the way it should be held to check CG.
Perplexed!
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I tried your suggestion (fb perpendicular to tail boom). Got same results.
Yea, You may be right.
Still confusing though since she levels when held horizontal but not when blades are held vertical.
I just built this one so the training gear are on while I experiment with the settings.
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Yea, You may be right.
Still confusing though since she levels when held horizontal but not when blades are held vertical.
I just built this one so the training gear are on while I experiment with the settings.
Still confusing though since she levels when held horizontal but not when blades are held vertical.
I just built this one so the training gear are on while I experiment with the settings.
- - - Updated - - -
Yea, You may be right.
Still confusing though since she levels when held horizontal but not when blades are held vertical.
I just built this one so the training gear are on while I experiment with the settings.