I have maybe 2 dozen flights on my Cx3, and its been flying very well until today. Until today when hovering its been rock steady, I would even say hands free. But today it all changed, my first flight today pretty much normal except when hovering. Instead on being in a solid almost none moving hovering it stated to sway and move around. Its called the TBE, toilet bowl effect. its starts out moving in a small circular motion and if it dont try to stop it it continues to get larger.. Flew it 5 or 6 times last weekend and all was well, this weekend crap.

How can I correct this motion?

If it matters, there is no change it batteries or physical condition of the heli..

Thanks.

Wingspam,

Check you flybar on top. Make sure it has not gotten bent and that the linkage to the upper blades is not binding at all. I used to put a light, single drop of thin oil on those two friction spots to keep it moving smoothly. Pop the little top cap off and put one drop there and one small drop on the ball linkages to the upper blades. I have not flown my CX3 in a while since Imoved up to my SR, but that always helped me.

It is the flybar that normally causes the TBE, assuming that the blades and other linkages are not bent or out of whack.

Hope this helps.

Chris

Hi,
I'm just a beginner.
A bent flybar may also cause TBE.
Also, if the flybar is not leveled when the motors are on, you may have TBE.
When the motors are on, raise the heli with your hands at the level of your eyes and look at the flybar. It must look perfectly horizontal and 1000% parallel to the upper blades.
This thing of the flybar having to be parallel to upper blades is unbelievably important.
Here is what I think that happens when they are not parallel: when the rotor is spinning, the flybar will get horizontal due to the centrifugal force. The upper blades, that depend on the flybar to get levelled, will not. If the upper blades are not horizontally leveled during the flight (because they are not parallel to the flybar), the heli will move to the direction in which the upper blades is pointing downward. And this direction is always changing because the inner shaft is spinning. Then, TBE. This is a thing I observed on my own, but I may be wrong because I'm just a beginner.
JC

Hi,
Since yesterday I've been trying to get rid of a annoying tbe on my cx3.
I checked everything many times and changed all blades and flybar just in case, with no result.
I put the originals back and checked John Salt's web site to find an answer for what was going on.
He emphasizes that not only the flybar must be completely loose, but also the upper blades must seesaw loose on their pinions.
I really don't know what I did after that, but the tbe is gone for now.
It appeared just like yours: all of a sudden and with not apparent reason.
And it went away just the way it came.
Go figure.

http://www.rchelicopterfun.com/toilet-bowl-effect.html

hey wings,
did you solve your heli tbe?
regards.