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  #1  
Old 12-04-2020, 06:19 PM
chevytoo chevytoo is offline
 
Join Date: May 2011
Location: Langley B.C.
Posts: 20
Default Nose wheel vibration

I have had a vibration from the nose wheel since day one. I first thought it was shimmy. I tightened the nose wheel fork one castellation. All that did was make it more difficult to steer while taxiing. I saw in a shadow while landing that the nose wheel was bouncing vertical up and down. I have the original Vans setup with the axle bolt torqued to 7 to 10 ft lbs. The force to rotate the tire is about 6 lbs. I have backed off the torque of the bolt to just snug and made sure neither the bearing nor the adapter rotate with the wheel. Have not yet test flown but the drag on the wheel feels close to the same. Any ideas what is causing this vibration?
Ray
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  #2  
Old 12-04-2020, 06:45 PM
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Skid Skid is offline
 
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Location: KBUU
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Have you balanced the nose wheel?
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  #3  
Old 12-05-2020, 07:25 AM
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Steve Melton Steve Melton is offline
 
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Default

I recommend to change the bearing to a different style.
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  #4  
Old 12-05-2020, 01:02 PM
chevytoo chevytoo is offline
 
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Yes it balanced checked better than most aircraft tires.
Ray
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  #5  
Old 12-05-2020, 02:24 PM
N40ES N40ES is offline
 
Join Date: Oct 2017
Location: Maryland Eastern Shore
Posts: 83
Default Check out Antisplat Aero Bearing Mod

I sent a New Tire & Tube & Rim to Alan for the bearing Mod Install. He had to shave the tire to insure it was perfectly round. Claims it is surprising how many tires are "In Balance" BUT "Out of Round". Check out his video's!
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  #6  
Old 12-05-2020, 02:46 PM
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Carl Froehlich Carl Froehlich is offline
 
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 2,906
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Sometimes you just get a bad tire. Recommend:
- New tire
- Use the Matco replacement axle instead of the stock Vanís setup. You can then set the bearing pre-load just like you do the mains: http://www.matcomfg.com/axleassembly...dv-3657-1.html

Carl
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  #7  
Old 12-05-2020, 03:33 PM
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Skid Skid is offline
 
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+1 for the Matco axle.
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  #8  
Old 12-07-2020, 11:04 AM
rightrudder rightrudder is offline
 
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Location: Laguna Hills, CA
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+2 Matco axle. Properly adjusted, the stock bearings will not contribute to shimmy whatsoever.
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  #9  
Old 12-07-2020, 01:17 PM
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bruceh bruceh is offline
 
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My nose wheel tire needed replacing. Bought a replacement from Van's. It is VERY out of round. It can really start bouncing at certain taxi speeds.
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  #10  
Old 12-07-2020, 02:11 PM
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rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
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Default

Quote:
Originally Posted by Carl Froehlich View Post
Sometimes you just get a bad tire. Recommend:
- New tire
- Use the Matco replacement axle instead of the stock Vanís setup. You can then set the bearing pre-load just like you do the mains: http://www.matcomfg.com/axleassembly...dv-3657-1.html

Carl
FYI, Van's has a new nose wheel axle design that is very similar to the Matco axle (though less expensive).

I think it now is the standard part in tri gear finish kits other than the RV-12.
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