angles for Servo torque, video answer to Skip

[@skip1835]

Thanks Joe - a bit of chuckle on my end - who wouldn't take a video post over a comment reply ! Perfect btw, muchly appreciated! 🙏

[@Jon_Flys_RC]

That first wing has horrible geometry, it’s falling rate before even coming off of center. Ideally, the half length of your servo arm should be inline with the horn on the surface. The pushrod should be as long as possible to lengthen the arc it moves through. If you have the choice flip the servo so the output shaft is farther away from the surface horn. 90 degrees at neutral is an old way of thinking. The swept arc is a huge part of the setup.

[@thatairplaneguy]

So how do you know where the horn needs to be? I need to redo my rudder. Mine setup per instruction manual the rudder is slapping the elevator on one side with 112%end point and I’m a couple inches away from the elevator at 150% to the right. And that’s with 1.75” arm! It’s horrible out of the box.

[@Jon_Flys_RC]

That sounds like the centerline of the rudder horn is not on the hinge line. On a tail mounted rudder servo the horn should be set so the horn holes are on the hinge line but that goes back to forever. Put the horn inline with servo output shaft and hopefully you can use a long pushrod to minimize the swept arc.