Aligning Servo Horns

[eradohl]

Hi!

I have a TREX 450 PLUS DFC. I assume that when "aligning" the servo horns the transmitter should be on and all sticks in central position. Is this correct? Furthermore how critical is the "aligning" of the servo horns (ie being horizontal)? I believe that aligning of servo horns is most critical for the aileron, elevator and rudder servo horns. Is this correct?

BR/Dan

[nynextel88]

Yes center servos at mid-stick through your flybarless system and put the servo horns on as close to 90 degrees as possible. Do this for all servos including tail servo.

[Highspeed1964]

The reason for setting this center position is because of the radial nature of servos. By putting them at 90 degrees to the link (in a good design this would also mean 90 degrees to the servo) at mid-stick you get the most linear travel of the movement during normal operation. Having this adjustment off will result in off balance movement at one end of the travel or the other.

Is it critical? It is important that you get them as close as possible to centered (90 degrees) at mid-stick. However, most servos don't line up exactly so get them as close as you can. A degree or two won't make that much difference. And a normal part of your setup (fly-barred or flybar-less) will correct for this anyway.

In a fly-barred system, you simply fine-tune it with trim to get an exact zero - at least as near exact as your eyes/tools are capable of. In a flybar-less sytem this is done in the FBL setup (DO NOT add trim unless your particular FBL specifically allows it) and not at the transmitter.

Hope that helps,

Highspeed

[DPW]

Yes

Radio on sticks centered then install horns at 90
Horns @ 90 (horizontal) is critical for std links. Not so critical for turnbuckle links.
Problem
Swash is never 100% level with all horns at ~90

Tarot 450 left/right hand servo turnbuckle link (TL45116-02) $1.34

Turnbuckle links allow you to get a 100% level swash when servo horns are close to 90

[eradohl]

Hi!

Thanks a lot for elaborate answers.

BR/Dan

[DPW]

post mistake