Hello, while going over my new Arrow RTF, I've noticed the throttle servo twisting about as much as it can in it's rubber mounts.

I'm pretty sure this is due to the horn position but not sure. At idle or off, the servo linkage seems to be well past a comfortable center.

As you throttle up the linkage has to "pop" past this position. It all works fairly smoothly with the exception of the servo will move

in it's rubber mounts about 1/16 of an inch. IT IS THE SERVO ON THE LEFT.

The LEFT PHOTO is at idle/0ff position......MIDDLE PHOTO is at half throttle........RIGHT PHOTO is full throttle

Notice the line of movement is nice and straight from half to full throttle.

But......look at the line of movement from idle to half (or full)

Thanks and I appreciate any thoughts. I may be worrying about nothing but I'd like to have it as close to perfect as possible.

I would adjust it so that at 1/2 throttle, the servo is right up at 12:00. That should get you away from the extreme angle at full throttle. Take the clevis off at the carb, and screw it in about 1/8". Then take the servo arm off the servo, move the throttle stick on your TX to 1/2 throttle (with trim centered), and put the servo arm back on at 12:00. If the throttle barrel is not at about 50%, then adjust the clevis at the carb until it is.

The main goals are to make sure that the servo isn't binding (making noise) at either position, and you also want to be able to kill the engine using throttle trim. You want the engine to idle with the stick all the way down and mid-trim. Then if you move the trim lever down, the engine should stop.

Awesome reply and quick too! Thanks mclina

I'm gonna work on that little job right now.

The servo did in fact hum like crazy, hope I did'nt hurt it

After looking it over, it's plain to see it was not set up to operate at trim bottomed out, when I went to
mid trim, the humming stopped because the linkage lines up nice and straight.

Problem is, there is zero opening at mid trim. Your advice should fix that.

Many thanks!