Fury Extreme: Slop in Tail transmission

[Knud Pedersen DENMARK]

If I block the front “Front Drive Pinion” (#0231), with my finger, I can rotate the tailrotor approximately 30° back and forth.
It is because of:
- slop between the “torque drive” and the “front and back transmission shaft”,
- slop between the two “Tail rotor gears”

All my small “Screw Sokcet” in the gears and on the trasmissionshaft are tight.
And also the screws in the tail rotor hub.

The “Torque drive” and the transmission shaft is not very old/used. And it did not took long time before the slop was back…after I replaced it last time.....
As I assembled the tailgear, and made very little slop between gears, is removing the tailgearbox, it feels like the slop/gearmess is about same as when the gear was new.(can only just feel the slop)

IS THIS COMMEN, that there is that much slop the Tailrotor transmission
:( :(

ChopperKnud

[DavidH]

Well the back lash in the front pinion to the crown gear. Then you have some play between the two dog bones on each end of the torque tube and the delrin couplings. Then the back lash in the tail rotor gears. So there is 4 items that can create what you call slop.

30 deg's seems about normal to me. That is basically only 15 degs each direction from neutral.

David

[Props-n-blades]

I have a similar amount of play on the tail of my extreme, and I checked the play on some others' fury's: they all have aproximately the same play. I think it is normal.

[WillJames]

I would bet $$ it is wear in the front delrin cup that the tail drive engages in. It is like a 5 dollar part and one roll pin is used to take it on and off. This is where it wears most, the delrin cup at the tail box does not seem to wear near as bad. Take the boom off and check that front delrin coupler the tail drive goes into. Then change it while you got it apart and the play will be back to very little.