Today's Message Index:
----------------------
1. 04:20 AM - Re: Shudder/shimmy on landing/ brakes/tires and other stuff I want to talk about (Kelly McMullen)
2. 04:22 AM - Re: Re: Main gear shudder revisited (retread tires) (Kelly McMullen)
3. 04:38 AM - Re: Shudder/shimmy on landing/ brakes/tires and other stuff I want to talk about (Seano)
4. 07:27 AM - Re: Shudder/shimmy on landing (rv10flyer)
5. 07:42 AM - Re: RV-10 Battery (rv10flyer)
6. 07:50 AM - Re: Re: Main gear shudder revisited (retread tires) (PReid)
7. 08:28 AM - Re: Re: Main gear shudder revisited (retread tires) (Alan Mekler MD)
8. 09:05 AM - Re: Re: Main gear shudder revisited (retread tires) (PReid)
9. 09:13 AM - Re: Re: Main gear shudder revisited (retread tires) (Alan Mekler MD)
10. 03:32 PM - Re: Re: Shudder/shimmy on landing (Roger Standley)
11. 04:45 PM - Re: Re: Shudder/shimmy on landing (Seano)
12. 05:30 PM - Re: Re: Shudder/shimmy on landing (Roger Standley)
13. 06:40 PM - Re: Shudder/shimmy on landing (amekler)
14. 06:41 PM - Re: Shudder/shimmy on landing (Tim Lewis)
15. 07:22 PM - Re: Re: Shudder/shimmy on landing (Don McDonald)
16. 10:10 PM - Re: Re: Shudder/shimmy on landing (Steve T)
17. 10:19 PM - Gear leg stiffener update (Steve T)
Message 1
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| Subject: | Re: Shudder/shimmy on landing/ brakes/tires and other stuff |
I want to talk about
Sean,
You can correct the brake caliper problem, no need for new hardware.
You can find some brake silicone lube at any National Aircraft Parts
Assn store (aka NAPA0 or equivalent. Lube the pins(and nothing else).
If you have 5606 fluid in your brake system and any seeped out at the
caliper that can also cause it to stick, as well as being fire hazard.
Good excuse to change the system over to the better high temperature
fluid.
Kelly
On Sun, Aug 19, 2012 at 8:26 PM, Seano <sean@braunandco.com> wrote:
> Also started to get some brake drag on the left caliper. Noticed the slop
> on the pins and a little rubbing on the caliper from the edge of the rotor.
> Anyone else notice this?
> I may talk to Matco about aftermarket brake parts.
Message 2
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| Subject: | Re: Main gear shudder revisited (retread tires) |
They have fooled you....that is Desser Tire's discount package on
Desser's web site.
On Sun, Aug 19, 2012 at 9:17 PM, <lewgall@charter.net> wrote:
>
> I've spent way too much time looking for the 10% discount package on the
> Desser site ... did you perhaps mean this on Van's?
>
> http://www.vansaircrafttires.com/products/-RV%252d10-Main-Tire-Package-Special-save-10%25-%28two-15%7B47%7D600%252d6PR-Retreads-%26-two-Aero-Classic-Easy-Flate-Tubes%29.html
>
> Later, - Lew
>
> do not archive
>
> -----Original Message----- From: Preid
> Sent: Sunday, August 19, 2012 10:21 PM
> To: rv10-list@matronics.com
> Subject: Re: RV10-List: Re: Main gear shudder revisited (retread tires)
>
>
>
> If you go to the RV-10 section of desser They have the retreads for the
> rear. There is a10% discount if you get the tires and leakproof tubes( with
> valve angle) package.
>
>
Message 3
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| Subject: | Re: Shudder/shimmy on landing/ brakes/tires and other stuff |
I want to talk about
Thanks Kelly,
I've been using Royco 782 as the fluid with the Viton O-rings from the
start.
I will try the lube and install the new pads.
Seems like a lubed them last inspection in January.
----- Original Message -----
From: "Kelly McMullen" <apilot2@gmail.com>
Sent: Monday, August 20, 2012 5:19 AM
Subject: Re: RV10-List: Shudder/shimmy on landing/ brakes/tires and other
stuff I want to talk about
>
> Sean,
> You can correct the brake caliper problem, no need for new hardware.
> You can find some brake silicone lube at any National Aircraft Parts
> Assn store (aka NAPA0 or equivalent. Lube the pins(and nothing else).
> If you have 5606 fluid in your brake system and any seeped out at the
> caliper that can also cause it to stick, as well as being fire hazard.
> Good excuse to change the system over to the better high temperature
> fluid.
> Kelly
>
> On Sun, Aug 19, 2012 at 8:26 PM, Seano <sean@braunandco.com> wrote:
>
>> Also started to get some brake drag on the left caliper. Noticed the
>> slop
>> on the pins and a little rubbing on the caliper from the edge of the
>> rotor.
>> Anyone else notice this?
>> I may talk to Matco about aftermarket brake parts.
>
>
>
Message 4
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| Subject: | Re: Shudder/shimmy on landing |
I like to fly early. I taxied 90* to the morning sun and my nose wheel/pant started
the fore-aft oscillation at 15-18 kts GS during phase 1. Since, I have flown
with the family near gross wt and have very little shudder/shimmy. I flew
up to a pancake breakfast with my 90 lb son/copilot Sat. I could feel an up and
down motion from main gear. Hmmm...that's interesting. I know my Van's supplied
tires are 5/16" out of round(no reason to balance an out of round tire),
but never noticed it during first 25 hrs of testing. All I could think of was
maybe I was riding more on the corners of the tires at low fuel/people loading
and feeling scalloped tires. I have an entire set of Desser retreads/tubes to
install at annual in November.
Van's first flight test in the -10 noted a shimmy. They said it was a brake disc
.002" off...they knew about this since day one.
I believe we will always have problems with our round flexible, twistable gear
legs, especially flying lightweight(which Sat was the first time in 50 hrs). So
fly at gross and see if it makes a difference with yours. Note: I have reinforced/improved
wheel pant mounting, matco nose wheel and orig unbalanced/out of
round/crappy tires/tubes. At least they don't leak down!
--------
Wayne Gillispie, A&P 05/93 PP 10/08
40983SB 12/1/2009-12/1/2011
N715WD 382nd Flying. TT= 74
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381352#381352
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| Subject: | Re: RV-10 Battery |
One reason I installed an aux PC680 beside my 925. It never happens at home.
--------
Wayne Gillispie, A&P 05/93 PP 10/08
40983SB 12/1/2009-12/1/2011
N715WD 382nd Flying. TT= 74
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381353#381353
Message 6
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| Subject: | Re: Main gear shudder revisited (retread tires) |
Sorry, yes I did. I thought I had the link to the package but apparently it got
lost in the mail.
This is the link however.
Word of advice, call Desser on the number from the site, the vans link is Desser's
dedicated page for the RV. I spent a lot of time with desser getting the deals
and parts and they will make an effort to assure you get what you want. The
key here is tell them you want a retread with a Good Year core, you can even
specify which Good Year tire you want, if they have it in stock you will get
that tire. Do not confuse that the retreads are all the same I am saying to specifically
as for a Good Year tire that has been retreaded, otherwise you may
get a condor with the retread. Desser grabs the next tire in the stack, there
is no preference piles but they will look in the stack for a specific core if
you ask.
If there is any issue, let me know.
Pascal
On Aug 20, 2012, at 4:21 AM, Kelly McMullen <apilot2@gmail.com> wrote:
>
> They have fooled you....that is Desser Tire's discount package on
> Desser's web site.
>
> On Sun, Aug 19, 2012 at 9:17 PM, <lewgall@charter.net> wrote:
>>
>> I've spent way too much time looking for the 10% discount package on the
>> Desser site ... did you perhaps mean this on Van's?
>>
>> http://www.vansaircrafttires.com/products/-RV%252d10-Main-Tire-Package-Special-save-10%25-%28two-15%7B47%7D600%252d6PR-Retreads-%26-two-Aero-Classic-Easy-Flate-Tubes%29.html
>>
>> Later, - Lew
>>
>> do not archive
>>
>> -----Original Message----- From: Preid
>> Sent: Sunday, August 19, 2012 10:21 PM
>> To: rv10-list@matronics.com
>> Subject: Re: RV10-List: Re: Main gear shudder revisited (retread tires)
>>
>>
>>
>> If you go to the RV-10 section of desser They have the retreads for the
>> rear. There is a10% discount if you get the tires and leakproof tubes( with
>> valve angle) package.
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
Message 7
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| Subject: | Re: Main gear shudder revisited (retread tires) |
My tires are being delivered today.
How will i know which retreads i got?
Alan
Sent from my iPhone
On Aug 20, 2012, at 10:49 AM, PReid <rv10flyer@verizon.net> wrote:
> Pascal
Message 8
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| Subject: | Re: Main gear shudder revisited (retread tires) |
The process is all the same regardless of the core used. The difference is in the
original tire used to retread it. So if you look at the sidewall it will tell
you what core they used for the retread.
Some people just like having a certain tire, be it Michelin, Good Year, etc.. So
I was just giving a heads up that one can ask for it and Desser will attempt
to accommodate that request. Sales will tell you it's all the same however.
On Aug 20, 2012, at 8:27 AM, Alan Mekler MD <amekler@metrocast.net> wrote:
>
> My tires are being delivered today.
> How will i know which retreads i got?
> Alan
>
> Sent from my iPhone
>
> On Aug 20, 2012, at 10:49 AM, PReid <rv10flyer@verizon.net> wrote:
>
>> Pascal
>
>
>
>
Message 9
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| Subject: | Re: Main gear shudder revisited (retread tires) |
Thanks. I"ll know for the next time I order.
Alan
Sent from my iPhone
On Aug 20, 2012, at 12:04 PM, PReid <rv10flyer@verizon.net> wrote:
>
> The process is all the same regardless of the core used. The difference is in
the original tire used to retread it. So if you look at the sidewall it will
tell you what core they used for the retread.
> Some people just like having a certain tire, be it Michelin, Good Year, etc..
So I was just giving a heads up that one can ask for it and Desser will attempt
to accommodate that request. Sales will tell you it's all the same however.
>
>
>
> On Aug 20, 2012, at 8:27 AM, Alan Mekler MD <amekler@metrocast.net> wrote:
>
>>
>> My tires are being delivered today.
>> How will i know which retreads i got?
>> Alan
>>
>> Sent from my iPhone
>>
>> On Aug 20, 2012, at 10:49 AM, PReid <rv10flyer@verizon.net> wrote:
>>
>>> Pascal
>>
>>
>>
>>
>
>
>
>
>
Message 10
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| Subject: | Re: Shudder/shimmy on landing |
OK, lets summarize what people have said. There seem to be multiple
"triggers" to cause the shudder/shimmy effect on landing. It could be
mains and/or nose wheel: light toe in/out, brake disk "off", wheel pants
"off", tires "off"...you can take your pick. The point is that the
tapered main gear is too sensitive to a variety of "triggers". Lets make
the tapered main gear less susceptible by changing the dynamic.
Steve T at
steve@aircraftspecialty.com<mailto:steve@aircraftspecialty.com> has
offered to make up stiffeners but needs to know would aluminum or wood
work better? How long of a piece are we talking about?
I, for one, would like to give this a shot.
Roger "mine shudders, too" Standley
----- Original Message -----
From: rv10flyer<mailto:wayne.gillispie@gmail.com>
To: rv10-list@matronics.com<mailto:rv10-list@matronics.com>
Sent: Monday, August 20, 2012 7:26 AM
Subject: RV10-List: Re: Shudder/shimmy on landing
<wayne.gillispie@gmail.com<mailto:wayne.gillispie@gmail.com>>
I like to fly early. I taxied 90* to the morning sun and my nose
wheel/pant started the fore-aft oscillation at 15-18 kts GS during phase
1. Since, I have flown with the family near gross wt and have very
little shudder/shimmy. I flew up to a pancake breakfast with my 90 lb
son/copilot Sat. I could feel an up and down motion from main gear.
Hmmm...that's interesting. I know my Van's supplied tires are 5/16" out
of round(no reason to balance an out of round tire), but never noticed
it during first 25 hrs of testing. All I could think of was maybe I was
riding more on the corners of the tires at low fuel/people loading and
feeling scalloped tires. I have an entire set of Desser retreads/tubes
to install at annual in November.
Van's first flight test in the -10 noted a shimmy. They said it was a
brake disc .002" off...they knew about this since day one.
I believe we will always have problems with our round flexible,
twistable gear legs, especially flying lightweight(which Sat was the
first time in 50 hrs). So fly at gross and see if it makes a difference
with yours. Note: I have reinforced/improved wheel pant mounting, matco
nose wheel and orig unbalanced/out of round/crappy tires/tubes. At least
they don't leak down!
--------
Wayne Gillispie, A&P 05/93 PP 10/08
40983SB 12/1/2009-12/1/2011
N715WD 382nd Flying. TT= 74
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381352#381352<http://forums
.matronics.com/viewtopic.php?p=381352#381352>
http://www.matronics.com/Navigator?RV10-List<http://www.matronics.com/Nav
igator?RV10-List>
http://www.matronics.com/contribution<http://www.matronics.com/contributi
on>
Message 11
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| Subject: | Re: Shudder/shimmy on landing |
Make it too stiff and it may transfer energy to places you don't want it.
Sent from my iPhone
On Aug 20, 2012, at 16:31, "Roger Standley" <taildragon@msn.com> wrote:
> OK, lets summarize what people have said. There seem to be multiple "trigg
ers" to cause the shudder/shimmy effect on landing. It could be mains and/or
nose wheel: light toe in/out, brake disk "off", wheel pants "off", tires "o
ff"...you can take your pick. The point is that the tapered main gear is too
sensitive to a variety of "triggers". Lets make the tapered main gear less
susceptible by changing the dynamic.
>
> Steve T at steve@aircraftspecialty.com has offered to make up stiffeners b
ut needs to know would aluminum or wood work better? How long of a piece ar
e we talking about?
>
> I, for one, would like to give this a shot.
>
> Roger "mine shudders, too" Standley
>
>
>
>
> ----- Original Message -----
> From: rv10flyer
> To: rv10-list@matronics.com
> Sent: Monday, August 20, 2012 7:26 AM
> Subject: RV10-List: Re: Shudder/shimmy on landing
>
>
> I like to fly early. I taxied 90* to the morning sun and my nose wheel/pan
t started the fore-aft oscillation at 15-18 kts GS during phase 1. Since,
I have flown with the family near gross wt and have very little shudder/sh
immy. I flew up to a pancake breakfast with my 90 lb son/copilot Sat. I coul
d feel an up and down motion from main gear. Hmmm...that's interesting. I kn
ow my Van's supplied tires are 5/16" out of round(no reason to balance an ou
t of round tire), but never noticed it during first 25 hrs of testing. All I
could think of was maybe I was riding more on the corners of the tires at l
ow fuel/people loading and feeling scalloped tires. I have an entire set of D
esser retreads/tubes to install at annual in November.
> Van's first flight test in the -10 noted a shimmy. They said it was a brak
e disc .002" off...they knew about this since day one.
> I believe we will always have problems with our round flexible, twistable g
ear legs, especially flying lightweight(which Sat was the first time in 50 h
rs). So fly at gross and see if it makes a difference with yours. Note: I ha
ve reinforced/improved wheel pant mounting, matco nose wheel and orig unbala
nced/out of round/crappy tires/tubes. At least they don't leak down!
>
> --------
> Wayne Gillispie, A&P 05/93 PP 10/08
> 40983SB 12/1/2009-12/1/2011
> N715WD 382nd Flying. TT= 74
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=381352#381352
>
>
> http://www.matronicp; via the Web title=http://forums.matronics.com/ h
ref="http://forums.matronics.com">http://forums.matronics.com
> _p; generous bsp; title=http://www.matronics.
com/contribution href="http://www.matronics.com/contribution">http://www.m
atronics.com/c================
>
>
>
>
>
==========================
=========
==========================
=========
==========================
=========
==========================
=========
>
Message 12
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| Subject: | Re: Shudder/shimmy on landing |
Seano=2C
Agreed=2C what size did you use?
Subject: Re: RV10-List: Re: Shudder/shimmy on landing
From: sean@braunandco.com
Make it too stiff and it may transfer energy to places you don't want it.
Sent from my iPhone
On Aug 20=2C 2012=2C at 16:31=2C "Roger Standley" <taildragon@msn.com> wrot
e:
OK=2C lets summarize what people have said. There seem to be multiple
"triggers" to cause the shudder/shimmy effect on landing. It could be mains
and/or nose wheel: light toe in/out=2C brake disk "off"=2C wheel pants "off
"=2C tires
"off"...you can take your pick. The point is that the tapered main gear
is too sensitive to a variety of "triggers". Lets make the tapered main
gear less susceptible by changing the dynamic.
Steve T at steve@aircraftspecialty.com has
offered to make up stiffeners but needs to know would aluminum or wood work
better? How long of a piece are we talking about?
I=2C for one=2C would like to give this a shot.
Roger "mine shudders=2C too" Standley
----- Original Message -----
From: rv10flyer
To: rv10-list@matronics.com
Sent: Monday=2C August 20=2C 2012 7:26
AM
Subject: RV10-List: Re: Shudder/shimmy on
landing
I
like to fly early. I taxied 90* to the morning sun and my nose wheel/pant
started the fore-aft oscillation at 15-18 kts GS during phase 1. Since=2C
I
have flown with the family near gross wt and have very little
shudder/shimmy. I flew up to a pancake breakfast with my 90 lb son/copilo
t
Sat. I could feel an up and down motion from main gear. Hmmm...that's
interesting. I know my Van's supplied tires are 5/16" out of round(no rea
son
to balance an out of round tire)=2C but never noticed it during first 25
hrs of
testing. All I could think of was maybe I was riding more on the corners
of
the tires at low fuel/people loading and feeling scalloped tires. I have
an
entire set of Desser retreads/tubes to install at annual in November.
Van's first flight test in the -10 noted a shimmy. They said it was a
brake disc .002" off...they knew about this since day one.
I believe we
will always have problems with our round flexible=2C twistable gear legs
=2C
especially flying lightweight(which Sat was the first time in 50 hrs). So
fly
at gross and see if it makes a difference with yours. Note: I have
reinforced/improved wheel pant mounting=2C matco nose wheel and orig
unbalanced/out of round/crappy tires/tubes. At least they don't leak
down!
--------
Wayne Gillispie=2C A&=3BP 05/93 PP
10/08
40983SB 12/1/2009-12/1/2011
N715WD 382nd Flying. TT=
74
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381352#381352
<bnbsp=3B navigator="" photoshare=2C="" and="" title="http://
www.matronics.com/Navigator?RV10-List" href="http://www.matronics.com/Nav
igator?RV10-List">http://www.matronicp=3B
via the Web
title=http://forums.matronics.com/
href="http://forums.matronics.com">http://forums.matronics.com
_p=3B
generous
bsp=3B
title=http://www.matronics.com/contribution
href="http://www.matronics.com/contribution">http://www.matronics.com/c
================
</bnbsp=3B >
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
Message 13
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| Subject: | Re: Shudder/shimmy on landing |
will the RV-14 gear fit on the 10?
the wing is the same.
Alan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381430#381430
Message 14
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| Subject: | Re: Shudder/shimmy on landing |
Attached is the email I got back from Van's on this topic.
-------- Original Message --------
Subject: Re: RV-10 gear leg shimmy
From: Sterling <support@vansaircraft.com>
The wood stiffener is an option to address the main gear shimmy but more
as a last resort. Another way you can help this problem is by simply
adjusting the air pressure in your main wheels. This is most likely
caused by people having to much pressure in your tires. Try adjusting
pressure by two pounds at a time and testing. If this does not work to
your satisfaction you will than want to try the wood stiffener method.
Sterling
--
Tim Lewis -- HEF (Manassas, VA)
RV-6A N47TD -- 1104 hrs - sold
RV-10 N31TD -- 300 hrs
Seano said the following on 8/18/2012 2:05 PM:
>
> Tim,
>
> I fiberglassed oak stiffeners on the back of my gear legs. They fit inside the
fairing and are basically triangle shaped and milled to fit on the round tapered
gear leg. They have really helped with the shimmy. Mine started around 30
kias.
> If I'm really light and by myself I feel a little shimmy but much less than ever
before the stiffeners. If I have any passengers with me or cargo I have no
shimmy at all with the stiffeners. Before it would shimmy in any configuration.
> You can try what I did an that was using strapping tape first to try then out.
After it worked I prosealed the woo to the gear leg then glasses them in using
a spiral technique with 3" glass tape.
>
> Good luck
> I might be delivering a CJ to Manassas at the end of the month.
>
>
> Sent from my iPhone
>
> On Aug 18, 2012, at 11:35, Tim Lewis <TimRVator@comcast.net> wrote:
>
>>
>> Like many RV-10s (apparently), mine shudders during the landing rollout. Mine
starts when decelerating through 35-40 knots (or so) on landing. The speed
range at which the shudder occurs is only a small number of knots - less than
5 knot range I think, so the shudder phase stops pretty quickly during deceleration.
Hard braking may make the shudder more intense.
>>
>> Based on the successful experiences reported by Tim Olson and others, I bought the Marc Parnes DU42 wheel balancer (http://www.marcparnes.com/Ducati_Motorcycle_Wheel_Balancer.htm#DU42), and used that to balance all my wheels. The DU42 is very nice piece of equipment -- surprisingly sensitive.
>>
>> http://www.marcparnes.com/Ducati_Motorcycle_Wheel_Balancer.htm#DU42
>> https://dl.dropbox.com/u/93114308/ParnesOnStands.JPG
>>
>> It took a significant amount of weight to balance the wheels (several 1/4oz
weights on each wheel). From what I've read, others have had this same experience.
>> https://dl.dropbox.com/u/93114308/TireWts.JPG
>>
>> I also installed the planearound.com Wheel Fairing Bracket Spacers to stiffen
up the wheel fairing attachment to the main gear. The planearound product is
well made, fit fine, and really does stiffen up the wheel fairing bracket attachment.
>> https://dl.dropbox.com/u/93114308/PlaneAround1.JPG
>> https://dl.dropbox.com/u/93114308/PlaneAroundInstalled.JPG
>>
>> Results: No discernible change in landing roll out behavior. I still get about
the same shudder on roll out. Perhaps the onset speed has been raised a
small number of knots as a result of balancing and adding the brackets, but I'm
not sure about that.
>>
>> I'm not sure what else to try.
>>
>> Tim
>>
>> --
>> Tim Lewis -- HEF (Manassas, VA)
>> RV-6A N47TD -- 1104 hrs - sold
>> RV-10 N31TD -- 340 hrs
>>
>>
>>
>>
>>
>
>
Message 15
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| Subject: | Re: Shudder/shimmy on landing |
Not sure about the gear, but the wing is NOT the same. The wing is a 10 wi
ng, but it is 2 feet shorter. Aileron is the same, but the flaps are short
er. I would imagine that the attach point for the gear is not only enginee
red different, but would not adapt to the existing 10 mount point.=0ADon Mc
Donald=0A- =0A=0A________________________________=0A From: amekler <amekl
er@metrocast.net>=0ATo: rv10-list@matronics.com =0ASent: Monday, August 20,
2012 8:40 PM=0ASubject: RV10-List: Re: Shudder/shimmy on landing=0A =0A--
the RV-14 gear fit on the 10?=0Athe wing is the same.=0AAlan=0A=0A=0A=0A=0A
Read this topic online here:=0A=0Ahttp://forums.matronics.com/viewtopic.php
=
Message 16
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| Subject: | Re: Shudder/shimmy on landing |
Does anyone have their fairings off at the moment?
If you do, and you have a free minute, please measure the diameter of the ge
ar leg a few inches down from the fuselage. Then go 18" down the gear leg p
ast the first point you measured and measure the next diameter there please.
Those are the two measurements I'll need to make a prototype.
Thanks
Steve
P.S. Most people I have talked to believe this should be made of wood. If a
nyone has a differing opinion, let me know.
P.P.S. right now I still can't promise I'll make this available, but since i
t's an issue affecting a lot of folks I'll definitely give it a really good l
ook. I just want to make sure that whatever I make is of good quality and w
ill address the problem.
Take care
Steve
P.S. you can email the measurements to
steve@aircraftspecialty.com
Sent from my iPhone
On Aug 20, 2012, at 15:31, "Roger Standley" <taildragon@msn.com> wrote:
> OK, lets summarize what people have said. There seem to be multiple "trigg
ers" to cause the shudder/shimmy effect on landing. It could be mains and/or
nose wheel: light toe in/out, brake disk "off", wheel pants "off", tires "o
ff"...you can take your pick. The point is that the tapered main gear is too
sensitive to a variety of "triggers". Lets make the tapered main gear less
susceptible by changing the dynamic.
>
> Steve T at steve@aircraftspecialty.com has offered to make up stiffeners b
ut needs to know would aluminum or wood work better? How long of a piece ar
e we talking about?
>
> I, for one, would like to give this a shot.
>
> Roger "mine shudders, too" Standley
>
>
>
>
> ----- Original Message -----
> From: rv10flyer
> To: rv10-list@matronics.com
> Sent: Monday, August 20, 2012 7:26 AM
> Subject: RV10-List: Re: Shudder/shimmy on landing
>
>
> I like to fly early. I taxied 90* to the morning sun and my nose wheel/pan
t started the fore-aft oscillation at 15-18 kts GS during phase 1. Since,
I have flown with the family near gross wt and have very little shudder/sh
immy. I flew up to a pancake breakfast with my 90 lb son/copilot Sat. I coul
d feel an up and down motion from main gear. Hmmm...that's interesting. I kn
ow my Van's supplied tires are 5/16" out of round(no reason to balance an ou
t of round tire), but never noticed it during first 25 hrs of testing. All I
could think of was maybe I was riding more on the corners of the tires at l
ow fuel/people loading and feeling scalloped tires. I have an entire set of D
esser retreads/tubes to install at annual in November.
> Van's first flight test in the -10 noted a shimmy. They said it was a brak
e disc .002" off...they knew about this since day one.
> I believe we will always have problems with our round flexible, twistable g
ear legs, especially flying lightweight(which Sat was the first time in 50 h
rs). So fly at gross and see if it makes a difference with yours. Note: I ha
ve reinforced/improved wheel pant mounting, matco nose wheel and orig unbala
nced/out of round/crappy tires/tubes. At least they don't leak down!
>
> --------
> Wayne Gillispie, A&P 05/93 PP 10/08
> 40983SB 12/1/2009-12/1/2011
> N715WD 382nd Flying. TT= 74
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=381352#381352
>
>
> http://www.matronicp; via the Web title=http://forums.matronics.com/ h
ref="http://forums.matronics.com">http://forums.matronics.com
> _p; generous bsp; title=http://www.matronics.
com/contribution href="http://www.matronics.com/contribution">http://www.m
atronics.com/c================
>
>
>
>
>
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>
Message 17
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| Subject: | Gear leg stiffener update |
Hey everyone....
I'm not one to turn down a project, but I just saw that a guy on VAF is selling
stiffeners for the main gear.
His email is woodmanrog@comcast.net.
If he's already doing this, and if his stiffeners work, I don't want to develop
a product and compete with the guy who came out with it first.
Check with him and if that solution doesn't seem to work for the -10, I'm happy
to help out. But if it does, that might be the best option.
We are working on a bunch of neat things here, which I hope to start releasing
toward the end of the year. Have a lot of testing to do!
Take care,
Steve
Www.aircraftspecialty.com
Www.kitplanehoses.com
Www.kitplanemods.com
Sent from my iPhone
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