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Old 12-05-2012, 07:54 AM   #1
Gscott
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Default X50 tail buzzing

I have been having an issue with my x50 that I can't track down. The tail makes a loud buzzing under load. I have tried numerous tail blades and even mounted an Align v2 hub and grips but the issue still persists. Today I noticed play with the rear input gear assembly in the tail case. I can move the gear in and out about 1mm and I can also spin the bearing in the tail case. I disassembled the tail tonight and noticed the bearings and spacer for the input bevel gear are not a tight fit in the tail case. Anyone else have this issue? How tight should the bearings and spacer fit in the tail case?
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Old 12-05-2012, 08:46 AM   #2
tr911
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It sounds like the drive shaft is fluttering. Check your bearing placement and may be even add another bearing to the shaft.
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Titan x50 FBL, R50 Titan SE FBL, R50 V2, R30 V2 , Trex500, T-Rex 450x2, mCPx X2,
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Old 12-05-2012, 11:59 PM   #3
Elgyn
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Mine had a similar probem then I heard that the X50's have insufficient torque tube support so I did the double bearing up grade almost right away. Never had a probelm since
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Old 02-10-2014, 07:52 AM   #4
dede60
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Hi! I have the same problem that you and I would like to know if a washer 6x10x1.0 will help to fix the problem or if it's too big?
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Old 02-10-2014, 02:45 PM   #5
jinxjx
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hi there, have a look at this if you haven't already....Post #30....might help....and also the 2nd link......

http://www.helifreak.com/showthread....ht=torque+tube

http://www.helifreak.com/showthread....ht=start+shaft
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Old 02-11-2014, 08:51 PM   #6
skytrekin
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If you read my posts in this thread you can see where I had to remove some of the start shaft length as it was rubbing on the crankshaft. Pictures included.

http://www.helifreak.com/showthread.php?t=568841

The X50 is a great flying heli, with some of these things to check you can avoid some of the issues people sometimes have.
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Old 02-15-2014, 08:45 PM   #7
Rob43
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I've had tail buzzing before in my other helis. I had noticed it after touching tail blades in the grass. It turned out to be a bent tail hub in my case. I was unable to see the deformation, but swapping it out came from the advice of a friend who knew of this. Sure enough...quiet and smooth once I swapped it out. If you bumped the tail in a landing, it's worth investigating.
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