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T-REX 250 › After a crash the tail never locks again
04-09-2011 09:15 PM  6 years agoPost 1
cyberfox78

rrApprentice

Brazil

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Dear friends,

After a light crash i burned the ds420 tail servo
When i changed it with a new ds420 the tail doesnt lock
I tried everything.
Checked de linkages, the 90o angle of servo and link, setup of gp750
After turn it on when i move the tail with mynhans i can see the gyro working trying to ajust the tail but when i try to hover the tail starts to spin as fast as i put more pitch
The gyro gain is cnnected in gear channel and servo on rudder channel.
I tried to control the gain by gear travel ajust, tried to controle in usual gain menu but nothing a tried locks the tail

Help me please

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04-10-2011 01:44 AM  6 years agoPost 2
Heli-on

rrVeteran

Southern Cali, CA -​USA

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Is the tail spinning in the right direction - if you had to replace the belt? It should spin up into the main blades while hand turning the main gear clockwise.

The tail hub may have gotten bent or munched the bearings.

If it's mechanically solid, your burned servo may have taken out the gyro.

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04-10-2011 04:06 PM  6 years agoPost 3
jschenck

rrProfessor

La Vista, NE.

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or munched the bearings.
that'd be my first guess - tail grip bearings.

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04-10-2011 07:17 PM  6 years agoPost 4
Safe_Cracker

rrKey Veteran

Chicago, IL

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I have bought birds from people to find they had an extra 1/2 turn in the belt when they installed it or even turned the belt the wrong way before they hit the pulley lol.Polo

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T-REX 250 › After a crash the tail never locks again
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