REFLECTOR: Shimmy

[David Rene Dugas]

The dampener has an open fork design so as the wheel turns it eventually disconnects from the dampener fork and reconnects as it rotates back.  The only problem is if the wheel turns all the way around then it is disconnected which only happens when pushing or pulling the plane.  I guess if you pulled up a hill and turned the nose 90 degrees with one main locked then let the plane roll backwards then pulled back forward it could disconnect while inside the plane during taxi.
Unless you have beta and can back up as previously suggested in another post.

Rene'

On Sep 9, 2012, at 9:36 PM, Alex Balic wrote:

> So the stabilizer limits the deflection to 45 degrees each side of center- would that be a problem when say turning the plane around prior to run-up or similar situations where I would guess that the wheel wants to caster more than that?
>  
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of David Rene Dugas
> Sent: Sunday, September 09, 2012 9:11 PM
> To: Velocity Aircraft Owners and Builders list
> Subject: Re: REFLECTOR: Shimmy
>  
> Mark,
>  
> http://www.scottsperformance.com/litrack/257.pdf
>  
> One can read about it here.  FYI
>  
> Rene'
>  
>  
>  
> On Sep 9, 2012, at 6:46 PM, Mark Magee wrote:
> 
> 
> Renee,
> Keep us posted. I saw it down at the factory, but didn't get to discuss the mechanics of how it does what it does. Almost looks like a counter weight. My shimmy is gone after much trouble earlier. But as you mentioned it seems to return within the community.
> I hope this device is the end of it forever: even with an out of balance wheel, out of round tire etc.
> 
> Mark B. Magee
> N34XL
> 
> 
> On Sun, Sep 9, 2012 at 4:32 PM, David Rene Dugas <renedugas at gmail.com> wrote:
> Just got my Dampier back and mounted. Looks real cute. Easy taxi now. Thought some might wish to zoom in on the tire to see how violent a shimmy can be. All the cross hatching is result of recent mild shimmy. 35# pressure in tire and 15 # of tension measured with a fish gage just before flight. Solo flight, 3/4 fuel, smooth runway. Slight cross wind crab corrected well I thought. 600 hrs in Velocity.
> Those who have not had a bad one beware it is violent. Not like a Cessna.
> Rene
> 
> 
> 
> 
> 
> Rene' Dugas
> Sent from my iPhone4S
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