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trex tail spinsout during flips?

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trex tail spinsout during flips?

Old 08-04-2010, 10:16 AM
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Default trex tail spinsout during flips?

Hi I have a 450 and I recently progressed to inverted hovering. However, when I flip the helicopter from the inverted hover to the right side up hover, the tail gives a but and sometimes turns a whole 360 degrees. I think my gain is set correctly as my tail holds perfectly still when I punch the throttle/pitch. It also holds fine in backwards circuits.

Any suggestions? My gyro is a gy48v and my tail servo is a hs225
Old 08-04-2010, 10:52 AM
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Default RE: trex tail spinsout during flips?

Are you sure your not giving unitended rudder inputs when you move your collective from neg to positive ?
Old 08-04-2010, 12:43 PM
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Default RE: trex tail spinsout during flips?

I'm pretty sure I'm not but ill try and confirm. Any other ideas?
Old 08-04-2010, 12:45 PM
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Default RE: trex tail spinsout during flips?

I'm pretty sure I'm not but ill try and confirm. Any other ideas?
Old 08-04-2010, 01:16 PM
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Default RE: trex tail spinsout during flips?

do you have a different gyro to test?
Old 08-04-2010, 01:33 PM
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Default RE: trex tail spinsout during flips?

Naw, not at the moment. This is my first real helicopter.
Old 08-04-2010, 07:08 PM
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Default RE: trex tail spinsout during flips?

it might be the gyro is no good. or its on the setup.... I have had this problem even with a spartan Gyro. the heli was in fault...
Old 08-04-2010, 07:16 PM
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Default RE: trex tail spinsout during flips?

Do you remember what was wrong in the setup?

Old 08-05-2010, 02:31 AM
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Default RE: trex tail spinsout during flips?

what i did was replace the tail pitch slider, the L arm and the tail blades.. The L arm that I used was the metal ones and the tail blades were the one for the 450 PRo of align.... it solved the issues I had...

there is also one thing that I found that can cause that.. it might be your one way bearing is slipping... even a slight slippage on that can cause the tail to loose control when loaded.. tail kinda loose control and slip 90 - 180 deg
Old 08-05-2010, 02:36 AM
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Default RE: trex tail spinsout during flips?

here as you can see the tail was slipping.. it was causing some irregular unwanted tail movements that should have been rock solid....

[youtube]http://www.youtube.com/watch?v=Z3_BDq6os3A[/youtube]
Old 08-05-2010, 09:37 AM
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Default RE: trex tail spinsout during flips?

Hm, so I noticed that my tail was a bit sticky so I replaced the tail geat/shaft. Hopefully it works.

Thabks
Old 08-05-2010, 11:14 AM
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Default RE: trex tail spinsout during flips?

does your belt have the proper tension?
Old 08-05-2010, 12:27 PM
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Default RE: trex tail spinsout during flips?


I actually have a torque tube on my helicopter
Old 08-05-2010, 12:28 PM
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Default RE: trex tail spinsout during flips?

hadn't built a Trex 450 in a while... didn't know they had torque tubes now. My bad
Old 08-05-2010, 12:46 PM
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Default RE: trex tail spinsout during flips?

Its cool. The torque tube is amazing though
Old 08-05-2010, 07:26 PM
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Default RE: trex tail spinsout during flips?

yup the mechanicals really causes a lot of problems on a heli.. that is why its best that all parts are running smooth... its good that you replaced the tail shaft....

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