FlyingGiants - View Single Post - Ball joints on comp-arf surfaces?

Tired Old Man · 07-09-2007, 10:00 AM

On the single leg or wheel shaped phenolics you cannot safely use a ball link. It has to be a clevis or eventually the side loads imposed by the ball link on the phenolic will break it. With the single wheel horns (ala rudder servos) a clevis is quite limiting in travels and movement. However, there's nothing to prevent using a ball link on the servo side when using a metal servo arm. You do need to make certain that the phenolic horns are installed in a manner that permits a fairly straight shot from the servo side to prevent binding of the clevis though.

On the larger Comps using the double phenolic horns you simply install the ball link between the horn legs. That's what they are designed for.

07-09-2007, 10:00 AM	#5
Tired Old Man Bad-ass Super Contributer! Join Date: Jul 2006 Location: California Posts: 4,323	Re: Ball joints on comp-arf surfaces? On the single leg or wheel shaped phenolics you cannot safely use a ball link. It has to be a clevis or eventually the side loads imposed by the ball link on the phenolic will break it. With the single wheel horns (ala rudder servos) a clevis is quite limiting in travels and movement. However, there's nothing to prevent using a ball link on the servo side when using a metal servo arm. You do need to make certain that the phenolic horns are installed in a manner that permits a fairly straight shot from the servo side to prevent binding of the clevis though. On the larger Comps using the double phenolic horns you simply install the ball link between the horn legs. That's what they are designed for.