VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

  #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
Reply With Quote
  #2  
Old 12-04-2020, 06:45 PM
Skid's Avatar
Skid Skid is online now
 
Join Date: Jun 2006
Location: KBUU
Posts: 224
Default

Have you balanced the nose wheel?
__________________
Skid
RV-6A
IO-360 B1B
Reply With Quote
  #3  
Old 12-05-2020, 07:25 AM
Steve Melton's Avatar
Steve Melton Steve Melton is offline
 
Join Date: Apr 2011
Location: Cincinnati, OH
Posts: 3,098
Default

I recommend to change the bearing to a different style.
__________________
Steve Melton
Cincinnati, OH
RV-9A, Tip-up, Superior O-320, roller lifters, 160HP, WW 200RV, dual impulse slick mags, oil pressure = 65 psi, EGT = 1300F, flight hours = 900+ for all

Simplicity is the art in design.
I was born an airplane nut. I have no explanation for it.
My Artwork is freely given and published and cannot be patented.
www.rvplasticparts.com
Reply With Quote
  #4  
Old 12-05-2020, 01:02 PM
chevytoo chevytoo is offline
 
Join Date: May 2011
Location: Langley B.C.
Posts: 20
Default

Yes it balanced checked better than most aircraft tires.
Ray
Reply With Quote
  #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!
__________________
RV10 Bought Not Built
Reply With Quote
  #6  
Old 12-05-2020, 02:46 PM
Carl Froehlich's Avatar
Carl Froehlich Carl Froehlich is online now
 
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 2,891
Default

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
Reply With Quote
  #7  
Old 12-07-2020, 07:07 PM
Rjk921 Rjk921 is offline
 
Join Date: May 2019
Location: Swartz Creek, MI
Posts: 9
Default

If you haven’t checked the torque of the nose gear to the engine mount bolt, I suggest putting a wrench on it. I’ve owned a 9a for roughly 6 months and tried everything listed. Tire pressure and increasing nose axle torque helped slightly but the thing that took it from a problem to a minor annoyance was the upper bolt torque. Check the upper torque on the mains while you’re at it.
__________________
Dick K
RV9a

Last edited by Rjk921 : 12-07-2020 at 07:08 PM. Reason: Spelling
Reply With Quote
  #8  
Old 01-22-2021, 08:23 PM
AlexPeterson's Avatar
AlexPeterson AlexPeterson is offline
 
Join Date: Sep 2005
Location: Maple Grove, MN
Posts: 2,406
Default

Quote:
Originally Posted by chevytoo View Post
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
As others have said, change out that nosewheel bearing setup asap. Please see and read this thread carefully, particularly the parts pertaining to the bearing.
__________________
Alex Peterson
RV6A N66AP 1700+ hours
KADC, Wadena, MN
Reply With Quote
  #9  
Old 01-23-2021, 08:23 AM
Tankerpilot75's Avatar
Tankerpilot75 Tankerpilot75 is offline
 
Join Date: Jan 2015
Location: Oklahoma City, OK
Posts: 613
Default

My nose wheel had a bad shimmy and it only seem to get worse the faster I taxied. At my last condition inspection I completely removed the nose wheel bracket and nose wheel axle assembly and cleaned everything up. Then regreased everything and tightened to specs.

Big difference! I wonít say the shimmy is gone completely but itís definitely much better and I have to taxi at a fast speed to get it. Good luck!
__________________
Jim Harris, ATP, T38, EC/KC-135A/E/R, 2008 RV7A, 2nd owner, N523RM (2015)
Superior XPIO-360, Hartzel CS prop, Dual GRT Horizon WS, EIS, Garmin 340, 335 w/WAAS gps, Dual 430s (non-WAAS), TruTrak 385 A/P with auto-level & auto-trim, Tosten 6 button Military Grips, FlightBox wired to WS, Dynon D10A w/battery backup, 406 MHz ELT. Custom Interior, New TS Flightline hoses, Great POH!
Retired - Living the dream - going broke!
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 05:22 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.