REFLECTOR: Nose wheel shimmy

[Tom Martino]

I agree.  I do not think it is a design flaw.  I think it must have
something to do with the angles (left to right and front to back) of the
strut and the tightness of the nut to fork and the thickness of the
washer-bellevilles.  Many factors that somehow come together for some
... and plague others.

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Scott Derrick
Sent: Friday, August 11, 2006 7:57 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Nose wheel shimmy

Kirk,

Every time I hear about an "incurable" nose gear shimmy I wonder, what 
is different.  There are too many flying V's with no problem, like my 
airplane for this to be a design flaw. 

I experienced mild shimmy one time. After pulling up to the hanger I 
discovered the nose wheel was almost free spinning. I had just replaced 
the nose wheel tire and "thought" I had tightened it enough when it was 
on the jacks but didn't check during pre-flight. Its a must item on my 
pre-flight now. 450 hours and only that one time.

If Velocity has a manufacturing problem with the nose gear strut where 
the angle is that far off that would explain it.  We already know a few 
were manufactured with the wrong hardness process.  This really sounds 
like Velocity "sometimes" has a QA problem for OEM parts.

thanks for the info,

Scott


NMFlyer1 at aol.com wrote:
> Kirk,..
>  
> I am not flying yet, but wonder if anyone else has a similar part 
> anomaly.
>  
> My nosegear could not get the required angle on the lower kingpin 
> portion of the nose gear leg. I tried and tried and it just seemed 
> off. I pulled the nose gear leg out... and put it in a vise so that 
> the upper portion of the leg was plumb. The lower part was way off.
>  
> I called the factory and asked if the lower part of the leg was 
> supposed to be exactly parallel with the upper part .  They said yes.

> I informed them that mine was not, and that I could not get the 
> required "rake" or angle on that lower nose gear portion. They asked 
> me to send it back to the factory.  Although they could now figure out

> just what happened... they sent me a correct nose gear leg.
>  
> If you have a similar problem, you may have shopping cart syndrome, no

> matter what you do it will shimmy until you get the correct "rake" on 
> that kingpin.
>  
> Just something you might want to check.
>  
> Kurt Winker
>
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