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T-REX 450 › Tail blows out on aileron roll 3GX v2.1
01-03-2013 06:33 PM  5 years agoPost 1
The_Widowmaker

rrElite Veteran

Bear Valley Springs, CA

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Just completed a build of a new 450 Pro V2 3GX (v2.1) Super Combo. Heli seems to fly great. Tail holds nice in a punch out, elevator tic toc (have not tried aileron tic toc), front and back flips. The problem comes when I do a simple aileron roll (right.. have not tried left). The tail blows out and turns 180 degrees so in the end the heli is facing me when it started nose away.

My first step to sort the issue was a complete reprogramming of the the 3GX 2.1. Still happened. Next I did the tail grip flip mod but this did not fix the issue either. Tail linkage is silky smooth. I also checked tail grip bearings. Also confirmed orientation for 3GX in settings. I don't know what else to do. The 3GX 2.1 on my 500 works flawlessly. So far it only seems to happen on aileron roll. I will try left later today to see if it does it in that direction as well but for now this is all the info I have.

The only other 450 to compare to is mine but the setup is significatnly different so no help there really.

"I'm a Virgin.. I'm just not very good at it. "

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01-03-2013 11:06 PM  5 years agoPost 2
The_Widowmaker

rrElite Veteran

Bear Valley Springs, CA

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Solved.. I hope.

I knew the stick tail grip bearings were crap and typically go out after a while but these started going out immediately apparently. I had the heli on the bench and was trying swapping tail servos using one from my heli that has no issues. During that procedure I went to check for binding before hooking up servo. I could not move it by hand. Took grips off and the smaller bearings were complete trash. Found two spares, put original servo back on and went and did some rolls with no issue.

"I'm a Virgin.. I'm just not very good at it. "

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