REFLECTOR: fixed gear nose wheel

velocityxl velocityxl at fastmail.fm
Thu Apr 4 19:34:02 CDT 2013




Sorry it took so long have not been to the hanger till late. 

Sent from Ron's Samsung tablet 

-------- Original message --------
From: David Ullman <ullman at robustdecisions.com> 
Date: 03/17/2013  12:13 PM  (GMT-06:00) 
To: reflector at tvbf.org 
Subject: REFLECTOR: fixed gear nose wheel 
 
All, Thanks for the words.  I will take care and report back no matter what
I do. 

Ron, Are there pictures of your fin available?

David Ullman
N444DX
President EAA 292
541-754-3609
david at davidullman.com


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Today's Topics:

   1. Re:  fixed gear nose wheel (Mark Magee)
   2. Re:  fixed gear nose wheel (Andrew Judge)


----------------------------------------------------------------------

Message: 1
Date: Sun, 17 Mar 2013 10:56:31 -0500
From: Mark Magee <edjonesbrady at gmail.com>
To: velocityxl <velocityxl at fastmail.fm>, Velocity Aircraft Owners and
Builders list <reflector at tvbf.org>
Cc: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Subject: Re: REFLECTOR: fixed gear nose wheel
Message-ID: <771096E3-A34A-4AB5-B01B-F5FB3F7EECBB at gmail.com>
Content-Type: text/plain; charset="us-ascii"

The key on FG gear in-flight nosewheel cant is the torque on the dampener,
-after- all else on the shimmy issue have been properly handled. 8lbs
pressure on the dampener is all you should need (per Factory): if your too
tight and shimmy a little on take off you have a canted rudder. It is
critical you run the archive and handle the primary shimmy issue: nose wheel
strut bushing, wheel/tire balanced, nose strut alignment. If all those are
good, 8 lbs on the dampener is sufficient.

Mark B. Magee
N34XL XLFG
Sent from IPhone 4S

On Mar 17, 2013, at 9:41 AM, velocityxl <velocityxl at fastmail.fm> wrote:

> I had the same experiance except the fairing did not brake off .I did add
an extra tail to the front fairing for the same reason you want to. I have
had good success with the extra fairing on the back of the front wheel
fairing in keeping the front wheel straight
> 
> 
> 
> 
> Ron
> 
> Sent from Samsung tablet not an Ipad  Ron
> 
> 
> 
> -------- Original message --------
> From: David Ullman <ullman at robustdecisions.com> 
> Date: 03/17/2013 8:05 AM (GMT-06:00) 
> To: reflector at tvbf.org 
> Subject: Re: REFLECTOR: fixed gear nose wheel 
> 
> 
> I have an SEFG and don't have much of a shimmy problem.  Seems to come and
> go, and is never very bad.  But, a bigger issue occurred last summer.  I
had
> the front faring on and I took off.  The plane had a bad yaw that I had
not
> experienced before.  I checked and all the controls were working as they
> should.  I figured that somehow the front wheel was cocked and acting as a
> front rudder.  I landed and sure enough, when the front wheel touched
down,
> I felt a jerk, like the wheel aligning.  I taxied back to the hangar and
> found the back half of the front faring was missing.  The jerk of the
wheel
> aligning had whipped the fairing so hard that it literally tore off.
This
> confirmed what happened in flight, I must have skipped to the side just as
I
> lifted off and the friction was enough to hold the misalignment in place.
I
> started a search of the airport area for the faring half when I guy pulled
> up in truck with a "is this yours?".  It was on the runway, luckily he
> landed right after me, saw it depart my plane and was able to land around
it
> and go back and pick it up.  
> 
> I want to put the front faring back on, but don't want to experience this
> again. I think my friction is about right as I can easily steer when
taxiing
> and don't have much shimmy.  First question: anybody else ever experience
> this?  Second question: I am thinking of putting a rudder on the back half
> of the faring.  This should give enough aero force aft of the pivot to
make
> it weather vane should I knock it off center again.  It may also add a
> little shimmy damping.  I would have to beef the connection of the rear
half
> to the wheel.  It should look cool too.  Has anyone tried this?  
> 
> David Ullman
> N444DX
> President EAA 292
> 541-754-3609
> david at davidullman.com
> 
> 
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------------------------------

Message: 2
Date: Sun, 17 Mar 2013 16:41:17 +0000
From: Andrew Judge <ajudge at grovenetworks.com>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Subject: Re: REFLECTOR: fixed gear nose wheel
Message-ID:
<10DC101DE8601246BDDC561D5EA044A41D294FB6 at EXCH10.grovenetworks.com>
Content-Type: text/plain; charset="Windows-1252"

I have an SEFG and had shimmy one time in about 600 hours. That was with
the first landing on my 2nd nose wheel pant. Enough to shake it loose and
never use that wheel pant again. Third pair was a charm. I've had shimmy
one time - due to that wheel pant and the factory made the third pair.

I think my 1st answer answers the 2nd question. It is unnecessary if the
pant is right?

On 3/17/13 9:05 AM, "David Ullman" <ullman at robustdecisions.com> wrote:

>I have an SEFG and don't have much of a shimmy problem.  Seems to come and
>go, and is never very bad.  But, a bigger issue occurred last summer.  I
>had
>the front faring on and I took off.  The plane had a bad yaw that I had
>not
>experienced before.  I checked and all the controls were working as they
>should.  I figured that somehow the front wheel was cocked and acting as a
>front rudder.  I landed and sure enough, when the front wheel touched
>down,
>I felt a jerk, like the wheel aligning.  I taxied back to the hangar and
>found the back half of the front faring was missing.  The jerk of the
>wheel
>aligning had whipped the fairing so hard that it literally tore off.
>This
>confirmed what happened in flight, I must have skipped to the side just
>as I
>lifted off and the friction was enough to hold the misalignment in place.
> I
>started a search of the airport area for the faring half when I guy pulled
>up in truck with a "is this yours?".  It was on the runway, luckily he
>landed right after me, saw it depart my plane and was able to land around
>it
>and go back and pick it up.
>
>I want to put the front faring back on, but don't want to experience this
>again. I think my friction is about right as I can easily steer when
>taxiing
>and don't have much shimmy.  First question: anybody else ever experience
>this?  Second question: I am thinking of putting a rudder on the back half
>of the faring.  This should give enough aero force aft of the pivot to
>make
>it weather vane should I knock it off center again.  It may also add a
>little shimmy damping.  I would have to beef the connection of the rear
>half
>to the wheel.  It should look cool too.  Has anyone tried this?
>
>David Ullman
>N444DX
>President EAA 292
>541-754-3609
>david at davidullman.com
>
>
>



Andrew Judge
President
Grove Networks Inc.

http://www.grovenetworks.com - Check out our new website!
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Please email any requests for support to support at grovenetworks.com or call
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