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Old Jun 26, 2006, 08:10 AM
Registered User
delamar's Avatar
Adelaide, Australia
Joined Apr 2006
347 Posts
trex flybar cage not centering after forward elevator

Ive just noticed that if i apply forward elevator on a XL CDE trex, the flybar cage does not recentre and the servos buzz a little. If i apply back elevator then let go, the flybar does recentre, but the servos still make a little buzzing.

Ive lossened off all the screws on all the arms to see if something was to tight, but it still does it. Im wondering if perhaps my HS-55's are no good anymore?

Any help please, im new to trex's

And yes, the heli is set up correctly, just like in finless's videos.

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Old Jun 26, 2006, 08:17 AM
Registered User
Motions's Avatar
Tallahassee, FL
Joined Nov 2005
480 Posts
Originally Posted by delamar
Im wondering if perhaps my HS-55's are no good anymore?
Were they ever? They only gained popularity because they were the first mainstream micro servo that came out. They do not center well at all, as you can see, and will get worse over time. I would say get at least some HS-56 or S3110 serovs which would be much better.

You can stay with the 55s if all your seeing is a slight center problem and it doesn't annoy you too much.
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Old Jun 26, 2006, 08:22 AM
Registered User
Christchurch, New Zealand
Joined Jun 2006
6,794 Posts
If the flybar is completely free, then it's the servos. If not, look to friction around the seesaw, especially where it goes onto the main head (the very first bit in the assembly instructions). BTW, S75s center pretty well too and are otherwise about the same as the HS-55, if you want cheap.
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Old Jun 26, 2006, 09:54 AM
Now Wren 1701
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Wren, MS
Joined Jul 2005
1,329 Posts
Make sure all of your ball links are free, a sticky ball link will do the same thing.
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Old Jun 26, 2006, 10:14 AM
Team Compass/KBDD Team Pilot
Ah Clem's Avatar
Joined Mar 2005
3,375 Posts

Mine did this and it was the washout control, where the screw goes through the plastic part. I loosened it slightly here and the problem was corrected.
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