torq bl 9088 [ wag]

[mrultralite]

anyone using this tail servo on 6hvult ? i have a small tail wag at hover, tried moving all gains / rates [skookum] not much diff . tail gain @ 25 , 10 points higher or lower makes it a bit worse. Any ideas , diff servo maybe /

thanks ,

[Ah Clem]

I am using the JR 8900G on my 6HV-U.

No issues, no wag.

How long is the output arm on your tail servo?

How does the present arm length line up with the FBL unit programming?

Does the tail pitch change assembly work perfectly smoothly on the bench, with the pushrod disconnected at the servo and while pulling outward on the tail blade grips (away from the hub) and twisting/feathering them?

Have you checked to see if the thrust bearings are lubricated and oriented correctly in the tail blade grips?

Which tail blades are you using?

Sorry for all of the questions, sir.

[mrultralite]

thanks Ah C ,,trusting thats the same servo , mech is fine i re-did the tail set up , that may fix [ set @ 85 L,R ] , [ using a goblin tail and kbdd blades by the way]

Its just i was reading on the skookum wiki that persistant tail wag might be an inadequate servo

[flint723]

That particular servo isn't inadequate unless it's going bad. Which could be the case since it has been out of production for a few years now. Only way to really tell would be to swap out servos if you are sure it's not mechanical.

I have one of those Torq 9088's and have used it on a few different helis, never had an issue with it.

[mrultralite]

Thanks flint,

[mrultralite]

Wasn't the setup , so back to gains start stop are @ 30/35 +\- 5 collective mix 25 control rate 480 ,

Any extremes I could try ?
But I won't bug you guys more about another crazy tail wag. Problly get it sorted.

[Ah Clem]

You are not bothering us at all, sir.

Tail Wag appears to be the number one problem, across all brands and models of helicopters, for years.

We want to help, if at all possible!

[mrultralite]

start stop up to 50's , teeny tiny bit of stiffness in grip ball link , anyway seems fixed

[Ah Clem]

I have had to ream the tail spider ball links on everything I own. Even a little drag can cause issues.