HI all

I am new to this forum..I have a wl toys v911 pro fom banggood.

after the initial flight, the tail rotor does not rotate for low throttle levels.
it only rotates for high throttle level and when the stick is at the right.

any help in this matter??

Did you try trimming the rudder?

Yes I have tried that already.

Is this because of depleting battery of the heli or tx??

the heli batteries are new.

tx shows 50% power level

No tx power is not a problem.

Did you bang the tail rotor anywhere while flying? If yes than its the tail motor problem.It has brushed micro motor which wont last long once they get hit.So you need to replace the tail motor.Else it would have a bad circuit board.