Hi,

It's nice that Hitec includes a bunch of different servo arms in their standard servos. Better than Airtronics!

They include a two piece adjustable arm. Is this safe to use on my elevator servo?

Thanks

There should be no problems. I have used them on 40 and 60 size planes with no problems.

I also use the actual arm part for the receiver antenna anchor at the back of the plane They are perfect, as the rubber band goes through the large oval hole and the antenna wire goes through two of the pushrod holes.

-David C.

OK to use? You bet.

The design is almost foolproof. Keep the screw tight and no way for it to fail. And the screw goes into grippy material and can't vibrate loose so what's to fail. And the material in the arm's parts is good stuff.

You bet.

The only drawback is that it gives newbies a way to rig the servo with a long or longer arm and the first choice should usually be to use the shorter arm on the servo when possible.

I also use them, but only when I'm not concerned about flex in the linkage. If a good stiff linkage is called for (rudder on precision aerobatics) this is not the linkage to use. Works fine for my SPAD Debonair, however, on both the rudder and elevator linkages.

Brad

Hey,

I only use the adjustabe servo arms for my throttle. I wouldn't use it on a primary flight control because i always like a fail-safe system. With the fixed servo arm, if the screw comes out, the servo arm should still stay on the servo because there is some force required to pull it off the servo. With the adjustable types, if your screw goes, so does the sevo arm. The only primary flight control i would put it on is the rudder, because you can fly without it.

You never no, it might save your plane one day.

Cheers

In theory, yea...but in practice...it will come off at the worst possible time - when there is a load on the surface. Back side of a loop and all of a sudden, you have no elevator

You can put a dab (TINY drop) of canopy glue on the back of the screw head and tighten it down. The screw basically gets glued to the arm. Canopy glue is more shock/vibration resistant and easy to break off when you need to remove the arm/screw. Also, it doesn't dirty up the threads like loc-tite does.