Today's Message Index:
----------------------
1. 04:03 AM - Re: RV-6A Nose Wheel Shimmy (Ralph E. Capen)
2. 04:51 AM - Re: RV-6A Nose Wheel Shimmy (Walt Ray)
3. 06:45 AM - Re: RV-6A Nose Wheel Shimmy (Todd Bristol)
4. 06:50 AM - Re: RV-6A Nose Wheel Shimmy (djtoddb)
5. 07:02 AM - Re: Re: RV-6A Nose Wheel Shimmy (Ralph E. Capen)
6. 07:20 AM - Re: Re: RV-6A Nose Wheel Shimmy (Schroeder, Bob (Parts Clerk))
7. 07:49 AM - Re: RV-6A Nose Wheel Shimmy (Peter Lang)
8. 07:50 AM - Re: Re: RV-6A Nose Wheel Shimmy (Allen Checca)
9. 07:52 AM - Re: RV-6A Nose Wheel Shimmy (Allen Checca)
10. 08:00 AM - Re: RV-6A Nose Wheel Shimmy (Allen Checca)
11. 08:04 AM - Re: Re: RV-6A Nose Wheel Shimmy (Ralph E. Capen)
12. 08:28 AM - Re: Re: RV-6A Nose Wheel Shimmy (Schroeder, Bob (Parts Clerk))
13. 08:40 AM - Re: Re: RV-6A Nose Wheel Shimmy (Ralph E. Capen)
14. 08:51 AM - Re: Re: RV-6A Nose Wheel Shimmy (Schroeder, Bob (Parts Clerk))
15. 10:29 AM - Re: Re: RV-6A Nose Wheel Shimmy (FLYaDIVE)
16. 11:02 AM - Re: Re: RV-6A Nose Wheel Shimmy (Ralph E. Capen)
17. 11:35 AM - Re: Re: RV-6A Nose Wheel Shimmy (Schroeder, Bob (Parts Clerk))
18. 01:03 PM - Re: Re: RV-6A Nose Wheel Shimmy (FLYaDIVE)
19. 01:25 PM - Re: Re: RV-6A Nose Wheel Shimmy (David Leonard)
20. 01:36 PM - Re: Re: RV-6A Nose Wheel Shimmy (Schroeder, Bob (Parts Clerk))
21. 02:13 PM - Re: RV-6A Nose Wheel Shimmy (posterman)
Message 1
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
In addition to torqueing the big nut as others have suggested, I also balanced
my nosewheel pant.
-----Original Message-----
>From: djtoddb <djtoddb@yahoo.com>
>Sent: Aug 12, 2015 9:29 PM
>To: rv6-list@matronics.com
>Subject: RV6-List: RV-6A Nose Wheel Shimmy
>
>
>Has anyone have experience in dealing with the Nose Wheel Shimmy on a RV-6A? What
are the causes and remedies?
>
>--------
>Titan Tornado II with Jab 3300
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=445867#445867
>
>
Message 2
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
I balanced the nose pant and haven't had an issue with shimmy.
On Thursday, August 13, 2015 6:10 AM, Ralph E. Capen <recapen@earthlin
k.net> wrote:
In addition to torqueing the big nut as others have suggested, I also balan
ced my nosewheel pant.
-----Original Message-----
>From: djtoddb <djtoddb@yahoo.com>
>Sent: Aug 12, 2015 9:29 PM
>To: rv6-list@matronics.com
>Subject: RV6-List: RV-6A Nose Wheel Shimmy
>
>
>Has anyone have experience in dealing with the Nose Wheel Shimmy on a RV-6
A? What are the causes and remedies?
>
>--------
>Titan Tornado II with Jab 3300
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=445867#445867
>
>
S -
-
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
Message 3
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
How do you balance the nose wheel pant???=C2-Todd Bristol Interactive Ent
ertainment DJs and Events,
=C2-
On Thursday, August 13, 2015 4:03 AM, Ralph E. Capen <recapen@earthlin
k.net> wrote:
In addition to torqueing the big nut as others have suggested, I also balan
ced my nosewheel pant.
-----Original Message-----
>From: djtoddb <djtoddb@yahoo.com>
>Sent: Aug 12, 2015 9:29 PM
>To: rv6-list@matronics.com
>Subject: RV6-List: RV-6A Nose Wheel Shimmy
>
>
>Has anyone have experience in dealing with the Nose Wheel Shimmy on a RV-6
A? What are the causes and remedies?
>
>--------
>Titan Tornado II with Jab 3300
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=445867#445867
>
>
S -
-
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
Message 4
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
How do you balance the the nose wheel Pant??? Fore and aft of the nose wheel "axel"
or from some other reference point??
--------
Titan Tornado II with Jab 3300
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=445877#445877
Message 5
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
To multiple requestors,
Here's what I did to balance the nosewheel pant...:
Using the nosewheel axel holes in the wheel pant as the balance point, I determined
approximately how much weight was required to balance.
Essentially, lead shot in a ziplock bag taped to the front of the nosewheel pant
'cone'. I actually used a little less than what was in the bag as there was
epoxy to bind it inside the 'cone'. Roughed up the inside of the 'cone' with
sandpaper, mixed a small batch of epoxy, poured the lead shot in to the epoxy
and stirred it up well. The epoxy/shot mixture was then poured in to the 'cone'
and covered with two layers of BID glass cloth. When that cured, I re-tested
the balance (which came out almost perfect so I left it) and reinstalled.
Ralph Capen
-----Original Message-----
>From: djtoddb <djtoddb@yahoo.com>
>Sent: Aug 13, 2015 9:49 AM
>To: rv6-list@matronics.com
>Subject: RV6-List: Re: RV-6A Nose Wheel Shimmy
>
>
>How do you balance the the nose wheel Pant??? Fore and aft of the nose wheel "axel"
or from some other reference point??
>
>--------
>Titan Tornado II with Jab 3300
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=445877#445877
>
>
Message 6
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
Ok, but how do you balance a wheel pant and what is the purpose?
-----Original Message-----
From: owner-rv6-list-server@matronics.com [mailto:owner-rv6-list-server@matronics.com] On Behalf Of Ralph E. Capen
Sent: Thursday, August 13, 2015 8:02 AM
Subject: Re: RV6-List: Re: RV-6A Nose Wheel Shimmy
To multiple requestors,
Here's what I did to balance the nosewheel pant...:
Using the nosewheel axel holes in the wheel pant as the balance point, I determined
approximately how much weight was required to balance.
Essentially, lead shot in a ziplock bag taped to the front of the nosewheel pant
'cone'. I actually used a little less than what was in the bag as there was
epoxy to bind it inside the 'cone'. Roughed up the inside of the 'cone' with
sandpaper, mixed a small batch of epoxy, poured the lead shot in to the epoxy
and stirred it up well. The epoxy/shot mixture was then poured in to the 'cone'
and covered with two layers of BID glass cloth. When that cured, I re-tested
the balance (which came out almost perfect so I left it) and reinstalled.
Ralph Capen
-----Original Message-----
>From: djtoddb <djtoddb@yahoo.com>
>Sent: Aug 13, 2015 9:49 AM
>To: rv6-list@matronics.com
>Subject: RV6-List: Re: RV-6A Nose Wheel Shimmy
>
>
>How do you balance the the nose wheel Pant??? Fore and aft of the nose wheel "axel"
or from some other reference point??
>
>--------
>Titan Tornado II with Jab 3300
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=445877#445877
>
>
Message 7
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
The first thing to look at is the tire pressure. It should not exceed 30 psi or
it is likely to shimmy. Start at 28 psi. It requires the additional friction
of the lower pressure. Next, check to be sure it is lubricated correctly at the
fitting. Next check to be sure the breakout tension is set to spec.
PDL
Sent from my iPad
> On Aug 13, 2015, at 1:49 AM, Tom & Marilyn Law <tlaw@northwestel.net> wrote:
>
>
> Could be a tire balance issue or excessive speed that starts the shimmy.
>
> When new (2005) my RV-6A did it and I torqued the big nut up a little
> tighter and the past 200 hours have been trouble free.
>
> Tom Law
> RV6A C-GNJI
> Canada
>
> From: owner-rv6-list-server@matronics.com
> [mailto:owner-rv6-list-server@matronics.com] On Behalf Of djtoddb
> Sent: August-12-15 6:29 PM
> To: rv6-list@matronics.com
> Subject: RV6-List: RV-6A Nose Wheel Shimmy
>
>
> Has anyone have experience in dealing with the Nose Wheel Shimmy on a RV-6A?
> What are the causes and remedies?
>
> --------
> Titan Tornado II with Jab 3300
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=445867#445867
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
Message 8
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
Where in the plans does it say that is necessary?
Rv 6a 1050 hrs.
Sent from my iPad
> On Aug 13, 2015, at 8:49 AM, djtoddb <djtoddb@yahoo.com> wrote:
>
>
> How do you balance the the nose wheel Pant??? Fore and aft of the nose wheel
"axel" or from some other reference point??
>
> --------
> Titan Tornado II with Jab 3300
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=445877#445877
>
>
>
>
>
>
>
>
>
>
>
Message 9
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
Check breakout torque and set it at factory setting.
Sent from my iPad
> On Aug 12, 2015, at 8:29 PM, djtoddb <djtoddb@yahoo.com> wrote:
>
>
> Has anyone have experience in dealing with the Nose Wheel Shimmy on a RV-6A?
What are the causes and remedies?
>
> --------
> Titan Tornado II with Jab 3300
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=445867#445867
>
>
>
>
>
>
>
>
>
>
>
Message 10
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
Try 45 psi in the nose tire. We installed the anti splat nose wheel bearing mod
and had them balance the tire, I was acceptable before but even better now.
Sent from my iPad
> On Aug 12, 2015, at 8:29 PM, djtoddb <djtoddb@yahoo.com> wrote:
>
>
> Has anyone have experience in dealing with the Nose Wheel Shimmy on a RV-6A?
What are the causes and remedies?
>
> --------
> Titan Tornado II with Jab 3300
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=445867#445867
>
>
>
>
>
>
>
>
>
>
>
Message 11
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
No requirement listed in the plans. I am using a SamJames mainwheel pant as a
nosewheel pant since I am also using a larger tire and fork up front.
I operate primarily from a grass strip which is not as good as it could be.
I found that my nosewheel pant brackets were cracked - along with experiencing
wheel shimmy.
Research in the archives showed others that had balanced their wheelpants fore
and aft.
After balancing the nosewheel pant - both the shimmy and bracket cracking have
gone...knock wood....
-----Original Message-----
>From: Allen Checca <allen@checca.net>
>Sent: Aug 13, 2015 10:50 AM
>To: "rv6-list@matronics.com" <rv6-list@matronics.com>
>Subject: Re: RV6-List: Re: RV-6A Nose Wheel Shimmy
>
>
>Where in the plans does it say that is necessary?
>
>Rv 6a 1050 hrs.
>
>Sent from my iPad
>
>> On Aug 13, 2015, at 8:49 AM, djtoddb <djtoddb@yahoo.com> wrote:
>>
>>
>> How do you balance the the nose wheel Pant??? Fore and aft of the nose wheel
"axel" or from some other reference point??
>>
>> --------
>> Titan Tornado II with Jab 3300
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=445877#445877
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
Message 12
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
So where is the balance point. At the axle shaft? I'm just trying to understand
the logic
-----Original Message-----
From: owner-rv6-list-server@matronics.com [mailto:owner-rv6-list-server@matronics.com] On Behalf Of Ralph E. Capen
Sent: Thursday, August 13, 2015 9:04 AM
Subject: Re: RV6-List: Re: RV-6A Nose Wheel Shimmy
No requirement listed in the plans. I am using a SamJames mainwheel pant as a
nosewheel pant since I am also using a larger tire and fork up front.
I operate primarily from a grass strip which is not as good as it could be.
I found that my nosewheel pant brackets were cracked - along with experiencing
wheel shimmy.
Research in the archives showed others that had balanced their wheelpants fore
and aft.
After balancing the nosewheel pant - both the shimmy and bracket cracking have
gone...knock wood....
-----Original Message-----
>From: Allen Checca <allen@checca.net>
>Sent: Aug 13, 2015 10:50 AM
>To: "rv6-list@matronics.com" <rv6-list@matronics.com>
>Subject: Re: RV6-List: Re: RV-6A Nose Wheel Shimmy
>
>
>Where in the plans does it say that is necessary?
>
>Rv 6a 1050 hrs.
>
>Sent from my iPad
>
>> On Aug 13, 2015, at 8:49 AM, djtoddb <djtoddb@yahoo.com> wrote:
>>
>>
>> How do you balance the the nose wheel Pant??? Fore and aft of the nose wheel
"axel" or from some other reference point??
>>
>> --------
>> Titan Tornado II with Jab 3300
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=445877#445877
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
Message 13
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
I did mine at the axle shaft as I was finding my brackets cracked both fore and
aft of the axle.....
-----Original Message-----
>From: "Schroeder, Bob (Parts Clerk)" <BSchroeder@rideuta.com>
>Sent: Aug 13, 2015 11:27 AM
>To: "rv6-list@matronics.com" <rv6-list@matronics.com>
>Subject: RE: RV6-List: Re: RV-6A Nose Wheel Shimmy
>
>
>So where is the balance point. At the axle shaft? I'm just trying to understand
the logic
>
>-----Original Message-----
>From: owner-rv6-list-server@matronics.com [mailto:owner-rv6-list-server@matronics.com] On Behalf Of Ralph E. Capen
>Sent: Thursday, August 13, 2015 9:04 AM
>To: rv6-list@matronics.com
>Subject: Re: RV6-List: Re: RV-6A Nose Wheel Shimmy
>
>
>
>No requirement listed in the plans. I am using a SamJames mainwheel pant as a
nosewheel pant since I am also using a larger tire and fork up front.
>I operate primarily from a grass strip which is not as good as it could be.
>
>I found that my nosewheel pant brackets were cracked - along with experiencing
wheel shimmy.
>
>Research in the archives showed others that had balanced their wheelpants fore
and aft.
>
>After balancing the nosewheel pant - both the shimmy and bracket cracking have
gone...knock wood....
>
>
>-----Original Message-----
>>From: Allen Checca <allen@checca.net>
>>Sent: Aug 13, 2015 10:50 AM
>>To: "rv6-list@matronics.com" <rv6-list@matronics.com>
>>Subject: Re: RV6-List: Re: RV-6A Nose Wheel Shimmy
>>
>>
>>Where in the plans does it say that is necessary?
>>
>>Rv 6a 1050 hrs.
>>
>>Sent from my iPad
>>
>>> On Aug 13, 2015, at 8:49 AM, djtoddb <djtoddb@yahoo.com> wrote:
>>>
>>>
>>> How do you balance the the nose wheel Pant??? Fore and aft of the nose wheel
"axel" or from some other reference point??
>>>
>>> --------
>>> Titan Tornado II with Jab 3300
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=445877#445877
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>
>
Message 14
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
Can I ask how many hours you had before you noticed the cracks and how many since
your repair?
-----Original Message-----
From: owner-rv6-list-server@matronics.com [mailto:owner-rv6-list-server@matronics.com] On Behalf Of Ralph E. Capen
Sent: Thursday, August 13, 2015 9:40 AM
Subject: RE: RV6-List: Re: RV-6A Nose Wheel Shimmy
I did mine at the axle shaft as I was finding my brackets cracked both fore and
aft of the axle.....
-----Original Message-----
>From: "Schroeder, Bob (Parts Clerk)" <BSchroeder@rideuta.com>
>Sent: Aug 13, 2015 11:27 AM
>To: "rv6-list@matronics.com" <rv6-list@matronics.com>
>Subject: RE: RV6-List: Re: RV-6A Nose Wheel Shimmy
>
>--> <BSchroeder@rideuta.com>
>
>So where is the balance point. At the axle shaft? I'm just trying to
>understand the logic
>
>-----Original Message-----
>From: owner-rv6-list-server@matronics.com
>[mailto:owner-rv6-list-server@matronics.com] On Behalf Of Ralph E.
>Capen
>Sent: Thursday, August 13, 2015 9:04 AM
>To: rv6-list@matronics.com
>Subject: Re: RV6-List: Re: RV-6A Nose Wheel Shimmy
>
>--> <recapen@earthlink.net>
>
>
>No requirement listed in the plans. I am using a SamJames mainwheel pant as a
nosewheel pant since I am also using a larger tire and fork up front.
>I operate primarily from a grass strip which is not as good as it could be.
>
>I found that my nosewheel pant brackets were cracked - along with experiencing
wheel shimmy.
>
>Research in the archives showed others that had balanced their wheelpants fore
and aft.
>
>After balancing the nosewheel pant - both the shimmy and bracket cracking have
gone...knock wood....
>
>
>-----Original Message-----
>>From: Allen Checca <allen@checca.net>
>>Sent: Aug 13, 2015 10:50 AM
>>To: "rv6-list@matronics.com" <rv6-list@matronics.com>
>>Subject: Re: RV6-List: Re: RV-6A Nose Wheel Shimmy
>>
>>
>>Where in the plans does it say that is necessary?
>>
>>Rv 6a 1050 hrs.
>>
>>Sent from my iPad
>>
>>> On Aug 13, 2015, at 8:49 AM, djtoddb <djtoddb@yahoo.com> wrote:
>>>
>>>
>>> How do you balance the the nose wheel Pant??? Fore and aft of the nose wheel
"axel" or from some other reference point??
>>>
>>> --------
>>> Titan Tornado II with Jab 3300
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=445877#445877
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>
>
Message 15
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
Ralph & Flock,
The shimmy is not caused by the wheel pant. I'm sorry that I missed the
origional post, the issue is vert easy to fix, here are the steps and why:
Their are two types of shimmy...
a) The wheel spins freely on the axel. A free spinning wheel will have a
shimmy/vibration that continues after the nose wheel is lifted off the
ground. The FIX is to tighten the nut on the axel so when you spin the
tire with moderate hand force you get ONLY one revolution of the tire.
b) Nose fork shimmy, this is caused when the castle nut on the bottom of
the nose wheel fork is too loose. This shimmy will disappear as soon as
the nose wheel is lifted off the ground. So, how tight should it be?
Enough to require 20 to 25 pounds of pull AT THE AXEL to move the fork.
How do you measure this force? Use a simple Fish Scale. To get this
torque you should have 4 ea, cup washers under the nut... 2 facing down
and 2 facing up, example: (( )). Grease the nose fork spindle and the
washers. Any "extream pressure" marine grease will work fine.
Ralph, sorry you added extra weight to your plane, especially at the nose.
Their is no up & down pivoting of the nose pant as it is secured at two
points: 1- The axel. 2- Where the nose strut passes through the pant. You
did seal up the hole with a rubber gasket that cuts down on drag and keeps
rain and snow out?
On a side note: The RV is based on a Grumman AA5x design. Grumman went
through this same problem and they added weight to the nose of the pant
also. It took them a few years to learn how to fix the problem.
Barry
Grumman AA5 and RV6/A pilot
On Thursday, August 13, 2015, Ralph E. Capen <recapen@earthlink.net> wrote:
> <javascript:;>>
>
>
> To multiple requestors,
>
> Here's what I did to balance the nosewheel pant...:
>
> Using the nosewheel axel holes in the wheel pant as the balance point, I
> determined approximately how much weight was required to balance.
> Essentially, lead shot in a ziplock bag taped to the front of the
> nosewheel pant 'cone'. I actually used a little less than what was in the
> bag as there was epoxy to bind it inside the 'cone'. Roughed up the inside
> of the 'cone' with sandpaper, mixed a small batch of epoxy, poured the lead
> shot in to the epoxy and stirred it up well. The epoxy/shot mixture was
> then poured in to the 'cone' and covered with two layers of BID glass
> cloth. When that cured, I re-tested the balance (which came out almost
> perfect so I left it) and reinstalled.
>
> Ralph Capen
>
>
> -----Original Message-----
> >From: djtoddb <djtoddb@yahoo.com <javascript:;>>
> >Sent: Aug 13, 2015 9:49 AM
> >To: rv6-list@matronics.com <javascript:;>
> >Subject: RV6-List: Re: RV-6A Nose Wheel Shimmy
> >
> <javascript:;>>
> >
> >How do you balance the the nose wheel Pant??? Fore and aft of the nose
> wheel "axel" or from some other reference point??
> >
> >--------
> >Titan Tornado II with Jab 3300
> >
> >
> >
> >
> >Read this topic online here:
> >
> >http://forums.matronics.com/viewtopic.php?p=445877#445877
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
--
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
Understood about cause and effect.
I think in my case the longer aft end of SamJames mainwheel pant was the cause
of my brackets breaking - not the shimmy....so the pant balance is for a different
reason.
I too had tightened up the main nut on the fork...and haven't had any noticeable
shimmy since - thanks for the info on the spinning wheel - I'll look at that
one too.
I have a plate in the back of the pant to keep stuff from building up - and plugs
for the axel holes.....
Good info - thanks again!
-----Original Message-----
From: FLYaDIVE
Sent: Aug 13, 2015 1:28 PM
Subject: Re: RV6-List: Re: RV-6A Nose Wheel Shimmy
Ralph & Flock,
The shimmy is not caused by the wheel pant. I'm sorry that I missed the origional
post, the issue is vert easy to fix, here are the steps and why:Their are
two types of shimmy... a) The wheel spins freely on the axel. A free spinning
wheel will have a shimmy/vibration that continues after the nose wheel is lifted
off the ground. The FIX is to tighten the nut on the axel so when you spin
the tire with moderate hand force you get ONLY one revolution of the tire. b)
Nose fork shimmy, this is caused when the castle nut on the bottom of the nose
wheel fork is too loose. This shimmy will disappear as soon as the nose wheel
is lifted off the ground. So, how tight should it be? Enough to require
20 to 25 pounds of pull AT THE AXEL to move the fork. How do you measure this
force? Use a simple Fish Scale. To get this torque you should have 4 ea, cup
washers under the nut... 2 facing down and 2 facing up, example: (( )). Grease
the nose fork spindle and the washers. Any "extream pressure" marine grease
will work fine.
Ralph, sorry you added extra weight to your plane, especially at the nose. Their
is no up & down pivoting of the nose pant as it is secured at two points: 1-
The axel. 2- Where the nose strut passes through the pant. You did seal up
the hole with a rubber gasket that cuts down on drag and keeps rain and snow
out? On a side note: The RV is based on a Grumman AA5x design. Grumman went
through this same problem and they added weight to the nose of the pant also.
It took them a few years to learn how to fix the problem.
BarryGrumman AA5 and RV6/A pilot
On Thursday, August 13, 2015, Ralph E. Capen <recapen@earthlink.net> wrote:
To multiple requestors,
Here's what I did to balance the nosewheel pant...:
Using the nosewheel axel holes in the wheel pant as the balance point, I determined
approximately how much weight was required to balance.
Essentially, lead shot in a ziplock bag taped to the front of the nosewheel pant
'cone'. I actually used a little less than what was in the bag as there was
epoxy to bind it inside the 'cone'. Roughed up the inside of the 'cone' with
sandpaper, mixed a small batch of epoxy, poured the lead shot in to the epoxy
and stirred it up well. The epoxy/shot mixture was then poured in to the 'cone'
and covered with two layers of BID glass cloth. When that cured, I re-tested
the balance (which came out almost perfect so I left it) and reinstalled.
Ralph Capen
-----Original Message-----
>From: djtoddb <djtoddb@yahoo.com>
>Sent: Aug 13, 2015 9:49 AM
>To: rv6-list@matronics.com
>Subject: RV6-List: Re: RV-6A Nose Wheel Shimmy
>
>
>How do you balance the the nose wheel Pant??? Fore and aft of the nose wheel "axel"
or from some other reference point??
>
>--------
>Titan Tornado II with Jab 3300
>
>
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=445877#445877
>
>
>
>
>
>
>
>
>
>
==========
List" target="_blank">http://www.matronics.com/Navigator?RV6-List
==========
FORUMS -
_blank">http://forums.matronics.com
==========
b Site -
-Matt Dralle, List Admin.
target="_blank">http://www.matronics.com/contribution
==========
--
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
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Message 18
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|
| Subject: | Re: RV-6A Nose Wheel Shimmy |
Correct! Balancing of the wheel pant is not required.
Correct the tension on the axel and the fork and shimmy and vibration will
disappear.
But, just to muddy the waters... A little...
For speed reasions, the length, trailing end of a structure should be 7
times the width. Example: If the widest part of a wheel pant is 6" than
the taper should be (6 x 7 = 42) ... 42" back from that point. Well, yo
u
can see it is not very practical to have wheel pants that long. Of course
this 7 factor is for the perfect translation. Which is not very practical.
Part two: Keeping mud, dirt, water, snow AND air out of the aft end of a
wheel pant will eliminate out of ballance conditions and give more speed.
These are known as Pressure Recovery Pants. The easiest way i know to do
this is to reduce the volume of the wheel pant. This is done by blocking
off the forward and aft areas of the pant and keeping the area around the
tire small.
Using the above information, use either fiberglass or rubber on the
backside of the nose strut to reduce the drag.
Another side note: A round object in an air stream has TWICE the drag as a
square object of the same frontal area.
Barry
On Thursday, August 13, 2015, Schroeder, Bob (Parts Clerk) <
BSchroeder@rideuta.com> wrote:
> Thank you for the explanation. Just to be clear, it is not necessary to
> =9Cbalance=9D the nose wheel pant?
>
>
> *From:* owner-rv6-list-server@matronics.com
> <javascript:_e(%7B%7D,'cvml','owner-rv6-list-server@matronics.com');>
> [mailto:owner-rv6-list-server@matronics.com
> <javascript:_e(%7B%7D,'cvml','owner-rv6-list-server@matronics.com');>] *O
n
> Behalf Of *FLYaDIVE
> *Sent:* Thursday, August 13, 2015 11:29 AM
> *To:* rv6-list@matronics.com
> <javascript:_e(%7B%7D,'cvml','rv6-list@matronics.com');>
> *Subject:* Re: RV6-List: Re: RV-6A Nose Wheel Shimmy
>
>
> Ralph & Flock,
>
>
> The shimmy is not caused by the wheel pant. I'm sorry that I missed the
> origional post, the issue is vert easy to fix, here are the steps and why
:
>
> Their are two types of shimmy...
>
> a) The wheel spins freely on the axel. A free spinning wheel will have
a
> shimmy/vibration that continues after the nose wheel is lifted off the
> ground. The FIX is to tighten the nut on the axel so when you spin the
> tire with moderate hand force you get ONLY one revolution of the tire.
>
> b) Nose fork shimmy, this is caused when the castle nut on the bottom of
> the nose wheel fork is too loose. This shimmy will disappear as soon as
> the nose wheel is lifted off the ground. So, how tight should it be?
> Enough to require 20 to 25 pounds of pull AT THE AXEL to move the fork.
> How do you measure this force? Use a simple Fish Scale. To get this
> torque you should have 4 ea, cup washers under the nut... 2 facing down
> and 2 facing up, example: (( )). Grease the nose fork spindle and the
> washers. Any "extream pressure" marine grease will work fine.
>
>
> Ralph, sorry you added extra weight to your plane, especially at the
> nose. Their is no up & down pivoting of the nose pant as it is secured a
t
> two points: 1- The axel. 2- Where the nose strut passes through the pant
.
> You did seal up the hole with a rubber gasket that cuts down on drag and
> keeps rain and snow out?
>
> On a side note: The RV is based on a Grumman AA5x design. Grumman went
> through this same problem and they added weight to the nose of the pant
> also. It took them a few years to learn how to fix the problem.
>
>
> Barry
>
> Grumman AA5 and RV6/A pilot
>
> On Thursday, August 13, 2015, Ralph E. Capen <recapen@earthlink.net
> <javascript:_e(%7B%7D,'cvml','recapen@earthlink.net');>> wrote:
>
>
>
> To multiple requestors,
>
> Here's what I did to balance the nosewheel pant...:
>
> Using the nosewheel axel holes in the wheel pant as the balance point, I
> determined approximately how much weight was required to balance.
> Essentially, lead shot in a ziplock bag taped to the front of the
> nosewheel pant 'cone'. I actually used a little less than what was in th
e
> bag as there was epoxy to bind it inside the 'cone'. Roughed up the insi
de
> of the 'cone' with sandpaper, mixed a small batch of epoxy, poured the le
ad
> shot in to the epoxy and stirred it up well. The epoxy/shot mixture was
> then poured in to the 'cone' and covered with two layers of BID glass
> cloth. When that cured, I re-tested the balance (which came out almost
> perfect so I left it) and reinstalled.
>
> Ralph Capen
>
>
> -----Original Message-----
> >From: djtoddb <djtoddb@yahoo.com>
> >Sent: Aug 13, 2015 9:49 AM
> >To: rv6-list@matronics.com
> >Subject: RV6-List: Re: RV-6A Nose Wheel Shimmy
> >
> >
> >How do you balance the the nose wheel Pant??? Fore and aft of the nose
> wheel "axel" or from some other reference point??
> >
> >--------
> >Titan Tornado II with Jab 3300
> >
> >
> >
> >
> >Read this topic online here:
> >
> >http://forums.matronics.com/viewtopic.php?p=445877#445877
> >
> >
> >
> >
> >
> >
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Message 19
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
FWIW, I installed a tailwheel and it seemed to prevent all my
nosewheel shimmy problems.
:-) Sorry, couldnt resist...
Dave Leonard
On 8/13/15, FLYaDIVE <flyadive@gmail.com> wrote:
> Correct! Balancing of the wheel pant is not required.
> Correct the tension on the axel and the fork and shimmy and vibration will
> disappear.
>
>
> But, just to muddy the waters... A little...
> For speed reasions, the length, trailing end of a structure should be 7
> times the width. Example: If the widest part of a wheel pant is 6" than
> the taper should be (6 x 7 = 42) ... 42" back from that point. Well, you
> can see it is not very practical to have wheel pants that long. Of course
> this 7 factor is for the perfect translation. Which is not very practical.
> Part two: Keeping mud, dirt, water, snow AND air out of the aft end of a
> wheel pant will eliminate out of ballance conditions and give more speed.
> These are known as Pressure Recovery Pants. The easiest way i know to do
> this is to reduce the volume of the wheel pant. This is done by blocking
> off the forward and aft areas of the pant and keeping the area around the
> tire small.
>
> Using the above information, use either fiberglass or rubber on the
> backside of the nose strut to reduce the drag.
>
> Another side note: A round object in an air stream has TWICE the drag as a
> square object of the same frontal area.
>
> Barry
>
>
> On Thursday, August 13, 2015, Schroeder, Bob (Parts Clerk) <
> BSchroeder@rideuta.com> wrote:
>
>> Thank you for the explanation. Just to be clear, it is not necessary to
>> balance the nose wheel pant?
>>
>>
>>
>> *From:* owner-rv6-list-server@matronics.com
>> <javascript:_e(%7B%7D,'cvml','owner-rv6-list-server@matronics.com');>
>> [mailto:owner-rv6-list-server@matronics.com
>> <javascript:_e(%7B%7D,'cvml','owner-rv6-list-server@matronics.com');>]
>> *On
>> Behalf Of *FLYaDIVE
>> *Sent:* Thursday, August 13, 2015 11:29 AM
>> *To:* rv6-list@matronics.com
>> <javascript:_e(%7B%7D,'cvml','rv6-list@matronics.com');>
>> *Subject:* Re: RV6-List: Re: RV-6A Nose Wheel Shimmy
>>
>>
>>
>> Ralph & Flock,
>>
>>
>>
>> The shimmy is not caused by the wheel pant. I'm sorry that I missed the
>> origional post, the issue is vert easy to fix, here are the steps and
>> why:
>>
>> Their are two types of shimmy...
>>
>> a) The wheel spins freely on the axel. A free spinning wheel will have
>> a
>> shimmy/vibration that continues after the nose wheel is lifted off the
>> ground. The FIX is to tighten the nut on the axel so when you spin the
>> tire with moderate hand force you get ONLY one revolution of the tire.
>>
>> b) Nose fork shimmy, this is caused when the castle nut on the bottom of
>> the nose wheel fork is too loose. This shimmy will disappear as soon as
>> the nose wheel is lifted off the ground. So, how tight should it be?
>> Enough to require 20 to 25 pounds of pull AT THE AXEL to move the fork.
>> How do you measure this force? Use a simple Fish Scale. To get this
>> torque you should have 4 ea, cup washers under the nut... 2 facing down
>> and 2 facing up, example: (( )). Grease the nose fork spindle and the
>> washers. Any "extream pressure" marine grease will work fine.
>>
>>
>>
>> Ralph, sorry you added extra weight to your plane, especially at the
>> nose. Their is no up & down pivoting of the nose pant as it is secured
>> at
>> two points: 1- The axel. 2- Where the nose strut passes through the
>> pant.
>> You did seal up the hole with a rubber gasket that cuts down on drag and
>> keeps rain and snow out?
>>
>> On a side note: The RV is based on a Grumman AA5x design. Grumman went
>> through this same problem and they added weight to the nose of the pant
>> also. It took them a few years to learn how to fix the problem.
>>
>>
>>
>> Barry
>>
>> Grumman AA5 and RV6/A pilot
>>
>> On Thursday, August 13, 2015, Ralph E. Capen <recapen@earthlink.net
>> <javascript:_e(%7B%7D,'cvml','recapen@earthlink.net');>> wrote:
>>
>>
>>
>> To multiple requestors,
>>
>> Here's what I did to balance the nosewheel pant...:
>>
>> Using the nosewheel axel holes in the wheel pant as the balance point, I
>> determined approximately how much weight was required to balance.
>> Essentially, lead shot in a ziplock bag taped to the front of the
>> nosewheel pant 'cone'. I actually used a little less than what was in
>> the
>> bag as there was epoxy to bind it inside the 'cone'. Roughed up the
>> inside
>> of the 'cone' with sandpaper, mixed a small batch of epoxy, poured the
>> lead
>> shot in to the epoxy and stirred it up well. The epoxy/shot mixture was
>> then poured in to the 'cone' and covered with two layers of BID glass
>> cloth. When that cured, I re-tested the balance (which came out almost
>> perfect so I left it) and reinstalled.
>>
>> Ralph Capen
>>
>>
>>
>>
>> -----Original Message-----
>> >From: djtoddb <djtoddb@yahoo.com>
>> >Sent: Aug 13, 2015 9:49 AM
>> >To: rv6-list@matronics.com
>> >Subject: RV6-List: Re: RV-6A Nose Wheel Shimmy
>> >
>> >
>> >How do you balance the the nose wheel Pant??? Fore and aft of the nose
>> wheel "axel" or from some other reference point??
>> >
>> >--------
>> >Titan Tornado II with Jab 3300
>> >
>> >
>> >
>> >
>> >Read this topic online here:
>> >
>> >http://forums.matronics.com/viewtopic.php?p=445877#445877
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>>
>>
>> ==========
>> List" target="_blank">http://www.matronics.com/Navigator?RV6-List
>> ==========
>> FORUMS -
>> _blank">http://forums.matronics.com
>> ==========
>> b Site -
>> -Matt Dralle, List Admin.
>> target="_blank">http://www.matronics.com/contribution
>> ==========
>>
>>
>>
>>
>> --
>> Sent from Gmail Mobile
>>
>>
>>
>>
>>
> ============*
>>
>>
>>
>>
>>
>>
>>
> onics.com/Navigator?RV6-List>*
>>
>>
> ============*
>>
>>
>>
>>
>>
>>
> ============*
>>
>>
>>
>>
> com/contribution>*
>>
> ============*
>>
>>
>>
>>
>
> --
> Sent from Gmail Mobile
>
--
David Leonard
Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net
Message 20
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
Now that's funny!
-----Original Message-----
From: owner-rv6-list-server@matronics.com [mailto:owner-rv6-list-server@matronics.com] On Behalf Of David Leonard
Sent: Thursday, August 13, 2015 2:24 PM
Subject: Re: RV6-List: Re: RV-6A Nose Wheel Shimmy
FWIW, I installed a tailwheel and it seemed to prevent all my nosewheel shimmy
problems.
:-) Sorry, couldnt resist...
Dave Leonard
On 8/13/15, FLYaDIVE <flyadive@gmail.com> wrote:
> Correct! Balancing of the wheel pant is not required.
> Correct the tension on the axel and the fork and shimmy and vibration
> will disappear.
>
>
> But, just to muddy the waters... A little...
> For speed reasions, the length, trailing end of a structure should be
> 7 times the width. Example: If the widest part of a wheel pant is 6"
> than the taper should be (6 x 7 = 42) ... 42" back from that point.
> Well, you can see it is not very practical to have wheel pants that
> long. Of course this 7 factor is for the perfect translation. Which is not
very practical.
> Part two: Keeping mud, dirt, water, snow AND air out of the aft end
> of a wheel pant will eliminate out of ballance conditions and give more speed.
> These are known as Pressure Recovery Pants. The easiest way i know to
> do this is to reduce the volume of the wheel pant. This is done by
> blocking off the forward and aft areas of the pant and keeping the
> area around the tire small.
>
> Using the above information, use either fiberglass or rubber on the
> backside of the nose strut to reduce the drag.
>
> Another side note: A round object in an air stream has TWICE the drag
> as a square object of the same frontal area.
>
> Barry
>
>
> On Thursday, August 13, 2015, Schroeder, Bob (Parts Clerk) <
> BSchroeder@rideuta.com> wrote:
>
>> Thank you for the explanation. Just to be clear, it is not necessary
>> to balance the nose wheel pant?
>>
>>
>>
>> *From:* owner-rv6-list-server@matronics.com
>> <javascript:_e(%7B%7D,'cvml','owner-rv6-list-server@matronics.com');>
>> [mailto:owner-rv6-list-server@matronics.com
>> <javascript:_e(%7B%7D,'cvml','owner-rv6-list-server@matronics.com');>
>> ]
>> *On
>> Behalf Of *FLYaDIVE
>> *Sent:* Thursday, August 13, 2015 11:29 AM
>> *To:* rv6-list@matronics.com
>> <javascript:_e(%7B%7D,'cvml','rv6-list@matronics.com');>
>> *Subject:* Re: RV6-List: Re: RV-6A Nose Wheel Shimmy
>>
>>
>>
>> Ralph & Flock,
>>
>>
>>
>> The shimmy is not caused by the wheel pant. I'm sorry that I missed
>> the origional post, the issue is vert easy to fix, here are the steps
>> and
>> why:
>>
>> Their are two types of shimmy...
>>
>> a) The wheel spins freely on the axel. A free spinning wheel will
>> have a shimmy/vibration that continues after the nose wheel is lifted
>> off the ground. The FIX is to tighten the nut on the axel so when
>> you spin the tire with moderate hand force you get ONLY one
>> revolution of the tire.
>>
>> b) Nose fork shimmy, this is caused when the castle nut on the bottom
>> of the nose wheel fork is too loose. This shimmy will disappear as
>> soon as the nose wheel is lifted off the ground. So, how tight should it be?
>> Enough to require 20 to 25 pounds of pull AT THE AXEL to move the fork.
>> How do you measure this force? Use a simple Fish Scale. To get this
>> torque you should have 4 ea, cup washers under the nut... 2 facing
>> down and 2 facing up, example: (( )). Grease the nose fork spindle
>> and the washers. Any "extream pressure" marine grease will work fine.
>>
>>
>>
>> Ralph, sorry you added extra weight to your plane, especially at the
>> nose. Their is no up & down pivoting of the nose pant as it is
>> secured at two points: 1- The axel. 2- Where the nose strut passes
>> through the pant.
>> You did seal up the hole with a rubber gasket that cuts down on drag
>> and keeps rain and snow out?
>>
>> On a side note: The RV is based on a Grumman AA5x design. Grumman
>> went through this same problem and they added weight to the nose of
>> the pant also. It took them a few years to learn how to fix the problem.
>>
>>
>>
>> Barry
>>
>> Grumman AA5 and RV6/A pilot
>>
>> On Thursday, August 13, 2015, Ralph E. Capen <recapen@earthlink.net
>> <javascript:_e(%7B%7D,'cvml','recapen@earthlink.net');>> wrote:
>>
>> --> <recapen@earthlink.net>
>>
>>
>> To multiple requestors,
>>
>> Here's what I did to balance the nosewheel pant...:
>>
>> Using the nosewheel axel holes in the wheel pant as the balance
>> point, I determined approximately how much weight was required to balance.
>> Essentially, lead shot in a ziplock bag taped to the front of the
>> nosewheel pant 'cone'. I actually used a little less than what was
>> in the bag as there was epoxy to bind it inside the 'cone'. Roughed
>> up the inside of the 'cone' with sandpaper, mixed a small batch of
>> epoxy, poured the lead shot in to the epoxy and stirred it up well.
>> The epoxy/shot mixture was then poured in to the 'cone' and covered
>> with two layers of BID glass cloth. When that cured, I re-tested the
>> balance (which came out almost perfect so I left it) and reinstalled.
>>
>> Ralph Capen
>>
>>
>>
>>
>> -----Original Message-----
>> >From: djtoddb <djtoddb@yahoo.com>
>> >Sent: Aug 13, 2015 9:49 AM
>> >To: rv6-list@matronics.com
>> >Subject: RV6-List: Re: RV-6A Nose Wheel Shimmy
>> >
>> >
>> >How do you balance the the nose wheel Pant??? Fore and aft of the
>> >nose
>> wheel "axel" or from some other reference point??
>> >
>> >--------
>> >Titan Tornado II with Jab 3300
>> >
>> >
>> >
>> >
>> >Read this topic online here:
>> >
>> >http://forums.matronics.com/viewtopic.php?p=445877#445877
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>>
>>
>> ==========
>> List" target="_blank">http://www.matronics.com/Navigator?RV6-List
>> ==========
>> FORUMS -
>> _blank">http://forums.matronics.com
>> ==========
>> b Site -
>> -Matt Dralle, List Admin.
>> target="_blank">http://www.matronics.com/contribution
>> ==========
>>
>>
>>
>>
>> --
>> Sent from Gmail Mobile
>>
>>
>>
>>
>>
> ============*
>>
>>
>>
>>
>>
>>
>>
> onics.com/Navigator?RV6-List>*
>>
>>
> ============*
>>
>>
>>
>>
>>
>>
> ============*
>>
>>
>>
>>
> com/contribution>*
>>
> ============*
>>
>>
>>
>>
>
> --
> Sent from Gmail Mobile
>
--
David Leonard
Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net
Message 21
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| Subject: | Re: RV-6A Nose Wheel Shimmy |
Barry Check 6 has it exactly right. I check my 'breakout force' at each condition
inspection and keep it at around 20lbs. I've not had any shimmy on almost
500 hours.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=445910#445910
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