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Home✈️Aircraft🚁HelicopterAlignT-REX 600N › Hub, Fan and Clutch issues...vibration
09-21-2009 02:59 AM  11 years ago
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ssrobzoom

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Hub, Fan and Clutch issues...vibration
I just purchased a new clutch and put it on a Dubro balancer it seem to be off. If I look at the oneway bearing, the clutch seems to be drilled off center.

Would this cause the 600N to vibrate while idling? My vibrates so much at idle, it moves around on the table at the field.
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09-21-2009 04:11 AM  11 years ago
Anthony.L

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Yes of course, if the clutch is drilled off center it will cause vibrations. Also check the upper clutch bearing block bearings, they could be shock and causing play/vibrations.
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09-21-2009 02:28 PM  11 years ago
ssrobzoom

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The upper bearing blocks have place but how can that cause the vibration? I put the clutch on a dubro balancer and its way off.
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09-21-2009 03:40 PM  11 years ago
reyd1

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Physics. If you spin an object that was drilled off center, the object will oscillate on that off center axis. More mass on one side. just because the clutch is balanced is a moot point. It will still cause a vibration.
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09-21-2009 08:14 PM  11 years ago
ssrobzoom

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What is the proper way of balancing all that attaches to the motor for a vibration free running motor at idle and spin up?

Some of my procedure as follows:

I put both the hub and fan on a dubro balancer and ck, if it checks well, I proceed to the clutch by checking it by itself.

If the clutch checks off, on the heavy side, where to you take the metal from?
File the outside or inside?
Or, do you attach the clutch to the hub/fan assembly then balance it as a whole assembly?

Do you file the heavy side of the fan or do you put drill dimples on the bottom side of the heavy side?

Anyone recommend any suggestions??

.
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09-29-2009 03:04 AM  11 years ago
ssrobzoom

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comment, suggestions?
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09-29-2009 03:08 AM  11 years ago
baddynergy

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I personally balance the hub and fan. THen all 3 pieces together, hub, fan and clutch. I dont like removing material from the clutch so I just remove a bit more material from the fan.
I drill dimples on the smooth side of the fan for balance. And yes remove from the heavy side.

However, if your clutch is misdrilled, you can balance all day long and it will still vibrate.

PS, the heavy side on mine, Ironically, turned out to be right where they silk screened the Align logo on the fan. I snaded off the logo and it was perfect..
**Unattended children will be givin a shot of espresso and a puppy**
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