Try spinning the wheels ( on jacks ) just to see if they wobble.
Then dismount the tires and tubes and inspect, remount.
It sounds like nosewheel shimmy also.  Make sure you have good shimmy
dampening in the strut and tight nosewheel bearings.  Then change the
nosewheel tire and tube if the problem persists.

Mark Ravinski
360  1443 hrs


----- Original Message -----
From: "Tom McNerney" <dudewanarace@yahoo.com>
To: <lml@lancaironline.net>
Sent: Thursday, July 31, 2008 3:26 PM
Subject: [LML] LNC2 Vibration


Before I go and over engineer a problem, I thought I would get every ones
expert advice first. It clearly has worked well for me in the past. (Thanks
Grayhawk)

I have what feels to be a classic case of warped rotors, but that isn't it.
About the last half of the roll out I start to get a vibration from the
right main gear. Or at least I think it is the right side. Thinking it was
an easy fix I replaced the rotors with a new set. I think it is better, but
that could be just in my head. The vibration is much worse under braking,
but does exist while just rolling. As most vibrations, it seems to have a
peak intensity at a certain speed. 30-50 mph I would guess. This has the
original rubber cushion landing gear.

So, here are my ideas..

Bad tire that is out of balance? Waaay out of balance. They are Chang Shin
tires, so maybe I got what I paid for. haha

Out of Alignment? This aircraft has had the service bulletin completed
regarding the main gear reinforcement. Could this have caused an alignment
issue?

Nature of the beast? It has had this problem from the day I purchased it, so
maybe it is just me. Although I hope not!

Would love to hear some ideas or past experience with this.

Thank a ton!
Tom McNerney
N54SG

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