450 Trex 450 pro 3gx tail issues

[billryalls]

There are SO MANY posts about this issue I'm not sure where to start so I have posted a video. It flew straight and crisp before touching the tail in grass resulting in the tail linkage (torque tube) unscrewing itself. Easy fix-screwed it back on. But now this wobble. It looks just the se in HH or rate and at 51, 65 & 85%.
[video=youtube_share;XDZ0TUgmyts]http://youtu.be/XDZ0TUgmyts[/video]

 

[Tony]

If you have tried playing with the tail gain and it's still doing it, then inspect every tooth on those gears. If the tail touched the ground, you more than likely stripped the gears.

 

[billryalls]

If you have tried playing with the tail gain and it's still doing it, then inspect every tooth on those gears. If the tail touched the ground, you more than likely stripped the gears.

Gears are still perfect. ?

 

[Tony]

Hm, how is the gear mesh on all of the gears, including the tail umbrella gears?

 

[billryalls]

Hm, how is the gear mesh on all of the gears, including the tail umbrella gears?

just noticed that the bottom half of sux teeth on the MAIN gear are gone but the lower gear (going to torque tube) is fine. That wouldn't affect tail would it?

 

[Tony]

That could cause a vibration that is affecting the gyro.

 

[billryalls]

Aaaah yeah. Very possible. Thanks. Replacing now.

 

[billryalls]

In replacing the main gear i find that it is a helical cut main and i only have straight gut spares. I also have strait cut pinions. What do i lose in changing over to straight cut gears?

 

[pvolcko]

A little more noise. A little less mechanical efficiency. Nothing to worry about. Try them out.

 

[Graham Lawrie]

Sounds mechanical in the video

 

[billryalls]

Well it's not the main gear issue. Replaced it and still have the same issue the video shows. ;(