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Reload this Page Return of the tail hum


X7 Discussion and support of the Gaui X7


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Old 08-22-2020, 12:50 PM   #1 (permalink)
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Default Return of the tail hum
Back in 2014 I got an X7 used with Spin tail blades. It had the infamous hum/buzz so I replaced the tail blades with Edge, problem solved for 6 years. Now it has returned. I have rebuilt the tail case with the upgraded shaft and gears and replaced the blades with Rototech. No luck.

Any idea what to replaced next? I hate shotgunning parts. And I have not had any crashes so the same tail shaft for 6 years (Some people reported vibration with the stock location of the bearings).
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Old 08-26-2020, 07:39 PM   #2 (permalink)
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Default TT
Maybe check TT Ends and bearings? Let us know when you find it.
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Old 08-27-2020, 09:54 AM   #3 (permalink)
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loctite the bearings with green into the tail plates!!!!!!!
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you should look into it...........
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Old 08-27-2020, 12:16 PM   #4 (permalink)
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loctite the bearings with green into the tail plates!!!!!!![IMG class=inlineimg]https://www.helifreak.com/images/smilies/thumbup.gif[/IMG]
Yeah, I noticed when putting my X5 together there wasn’t any green Loctite anywhere. Hmmmmm
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Old 08-27-2020, 09:39 PM   #5 (permalink)
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loctite the bearings with green into the tail plates!!!!!!!


What is this? Picture please.
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Old 08-27-2020, 10:17 PM   #6 (permalink)
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Just the OD of the Race... (Green Loctite/bearing retainer)


Click image for larger version Name: F8EC58BF-7ABF-44C6-9032-0693E9DE38AF_1598584670939.jpeg Views: 78 Size: 209.7 KB ID: 877363
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Old 08-28-2020, 08:55 PM   #7 (permalink)
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Default Good
I will have to take mine apart and do that ASAP. Thanks for the advice!
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Old 09-12-2020, 11:20 AM   #8 (permalink)
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Just the OD of the Race... (Green Loctite/bearing retainer)


Attachment 877363
I put a red dot on the tail pitch slider. This is turning when I spin up. Are you saying to loctite so it can't turn?
But there are bearing so I assume that is what it is supposed to do.
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Click image for larger version Name: tail.jpg Views: 29 Size: 61.6 KB ID: 880185  
Last edited by galaxy_jason; 09-12-2020 at 12:26 PM..
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Old 09-12-2020, 05:52 PM   #9 (permalink)
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Just the OD of the Race... (Green Loctite/bearing retainer)


Attachment 877363
I put a red dot on the tail pitch slider. This is turning when I spin up. Are you saying to loctite so it can't turn?
But there are bearing so I assume that is what it is supposed to do.
That’s the tail pitch slider. No loctite there!

I think my picture got messed up. There are two bearings that support the tail shaft in the tail housing. The left bearing is mounted in the plate you remove to take the tail shaft out. Those are the bearings that need loctite.
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Old 09-13-2020, 10:35 AM   #10 (permalink)
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OK, so to make sure the bearing doesn't slip in its' seat. Thanks.
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Last edited by galaxy_jason; 09-13-2020 at 01:31 PM..
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Old 09-16-2020, 09:31 PM   #11 (permalink)
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Ya i took mine apart and got this done. My kit was 10 flights old so no issue seen,.
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