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T-REX 450 › Help!!!! Tail twitching BAD!!!
12-14-2011 11:40 PM  5 years agoPost 1
tintmaster

rrKey Veteran

Wichita, Ks. U.S.A.

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I am having issues with my tail. I am using a Futaba GY520 w/ S9257. JR DS285MG's on cyclic, stock motor and ESC, Hyperion 3S 2200mAh lipo, Radix main and paddles, plastic tail blades.

I did the tail mod and flipped the grips, added KDE tail arm upgrade, Align metal bearing mount.

I have the gain set at 25% on 0, and 50% on 1. When I spool up to mid stick, everything seems fine. But as soon as I give it positive to lift off, the tail starts a to violently twitch back and forth.

I tried changing the gain down and up, but no change. Any idea's?

Just call me Farmer Brown. 'Cause I know how to really plant 'em

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12-14-2011 11:48 PM  5 years agoPost 2
japan3d

rrNovice

Sagamihara-Shi Japan

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Twitching

Check the tail rotor grip bearings. Mine were bad out of the box.

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12-15-2011 02:39 AM  5 years agoPost 3
jschenck

rrProfessor

La Vista, NE.

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I've seen bad bearings right out of the box on the new 450 pro v2 kits also.

But, what is your radio setup? It sounds like you may not be adjusting the gain. Example with the 3GX using DSM satellites the gain is on ch 7 where with most radio's you'd expect it on ch 5

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12-15-2011 02:58 AM  5 years agoPost 4
tintmaster

rrKey Veteran

Wichita, Ks. U.S.A.

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Help!!!! Tail twitching BAD!!!

I am using my JR X9503 w/ AR6200. The gyro is in the Gain and Rudd ports.

Just call me Farmer Brown. 'Cause I know how to really plant 'em

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12-15-2011 03:01 AM  5 years agoPost 5
jschenck

rrProfessor

La Vista, NE.

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That radio has the gain on channel 7 by default. Try adjusting the end points on channel 5. You can change the setup to have the gyro onch 5 but I'd need one in front of me to walk through the menu's.

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12-15-2011 03:05 AM  5 years agoPost 6
tintmaster

rrKey Veteran

Wichita, Ks. U.S.A.

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Help!!!! Tail twitching BAD!!!

Will try that. And I'm getting new bearings, as I got this heli used here on RR. Had to replace the head as the head block was bent, and bearings in the seasaw were junk.

Just call me Farmer Brown. 'Cause I know how to really plant 'em

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12-18-2011 09:22 PM  5 years agoPost 7
tintmaster

rrKey Veteran

Wichita, Ks. U.S.A.

My Posts: All  Forum  Topic

Help!!!! Tail twitching BAD!!!

Ok, so I took it to my buddy, Brian. Took him all of 2 minutes to go through the settings and got the gyro set on the right channel. Now it flies great!!!!

Thanks everyone for the help, Eugene

Just call me Farmer Brown. 'Cause I know how to really plant 'em

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T-REX 450 › Help!!!! Tail twitching BAD!!!
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