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wprunty(at)sewanee.edu
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 Posted: Tue Aug 11, 2009 7:50 am Post subject: RV10-List Digest: 18 Msgs - 08/10/09 |
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Is anyone having trouble with their RV 10 with a slow speed (decelerating on
landing) shimmy in the nose wheel, 39down to35 mph say. The vibration is
worse if braking on a down-hill part of the runway and worse with more
rather than less flaps put in. We put new doughnuts in at the top of the
strut, plus the washer Van sends. And the plane does better on level
serfaces, especially if set with no flaps and with some weight in the back.
We have replaced. shave where necessary, and balanced all three wheels (now
Goodyear Customs), installed the new axel for the nosewheel, and, as I said,
put a washer in at the top of the strut. Still there is that range of a
bout 4 mph when slowing that comes right under 40 mph, where I am guessing
the elevator loses its authority. Braking stops the vibration (getting under
30 mph). I am not sure what that does with weight distribution, just that
is gets us slow enough the vibration stops. The vibration is a pronounced
shimmy from the nose wheel.
Installing a washer at the top of the nose strut helped for level
surfaces, it seems, but an undulating runway can get the plane in a nose
down attitude and at the right speed the shimmy is guaranteed to begin, as
the plane slows below 40 mph. What about installing two washers at the top
of the strut, instead of one? Or a small amount of weight in the tail? Has
anyone changed out the nose strut to see if there was some bending in the
old one? What's the fix? A heavier duty strut for the nose, a second
washer in with the doughnuts, a weight in the tail, or just the installation
of floats?
This plane has an IO540 with a Hartzell CS
And wisdom welcomed.
WP flying RV 10 N814BW
---
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pitts_pilot(at)bellsouth.
Guest
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| Posted: Tue Aug 11, 2009 8:47 am Post subject: RV10-List Digest: 18 Msgs - 08/10/09 |
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Wisdom: Tighten the spindle nut until you get at least 25 lb of drag
measured at the axle. Might take more.
Linn
Wyatt Prunty wrote:
| Quote: |
Is anyone having trouble with their RV 10 with a slow speed
(decelerating on landing) shimmy in the nose wheel, 39down to35 mph
say. The vibration is worse if braking on a down-hill part of the
runway and worse with more rather than less flaps put in. We put new
doughnuts in at the top of the strut, plus the washer Van sends. And
the plane does better on level serfaces, especially if set with no flaps
and with some weight in the back.
We have replaced. shave where necessary, and balanced all three wheels
(now Goodyear Customs), installed the new axel for the nosewheel, and,
as I said, put a washer in at the top of the strut. Still there is that
range of a bout 4 mph when slowing that comes right under 40 mph, where
I am guessing the elevator loses its authority. Braking stops the
vibration (getting under 30 mph). I am not sure what that does with
weight distribution, just that is gets us slow enough the vibration
stops. The vibration is a pronounced shimmy from the nose wheel.
Installing a washer at the top of the nose strut helped for level
surfaces, it seems, but an undulating runway can get the plane in a nose
down attitude and at the right speed the shimmy is guaranteed to begin,
as the plane slows below 40 mph. What about installing two washers at
the top of the strut, instead of one? Or a small amount of weight in
the tail? Has anyone changed out the nose strut to see if there was
some bending in the old one? What's the fix? A heavier duty strut for
the nose, a second washer in with the doughnuts, a weight in the tail,
or just the installation of floats?
This plane has an IO540 with a Hartzell CS
And wisdom welcomed.
WP flying RV 10 N814BW
|
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Bob Turner
Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
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| Posted: Tue Aug 11, 2009 8:59 am Post subject: Re: RV10-List Digest: 18 Msgs - 08/10/09 |
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try running the nose tire at relatively low pressure.
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Bob Turner
RV-10 QB |
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rv10builder(at)verizon.ne
Guest
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| Posted: Tue Aug 11, 2009 9:13 am Post subject: RV10-List Digest: 18 Msgs - 08/10/09 |
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Also - balance everything up front. balance the tires and balance the wheel
pants.
If it were me, I would take the pants off and test it if it still has a
problem - balance the wheels- test it and see what happens if it solves the
problem put the pants back on and see if the problem returns, if so balance
the wheel pants.
Pascal
--------------------------------------------------
From: "Linn Walters" <pitts_pilot(at)bellsouth.net>
Sent: Tuesday, August 11, 2009 9:38 AM
To: <rv10-list(at)matronics.com>
Subject: Re: Re: RV10-List Digest: 18 Msgs - 08/10/09
| Quote: |
Wisdom: Tighten the spindle nut until you get at least 25 lb of drag
measured at the axle. Might take more.
Linn
Wyatt Prunty wrote:
>
>
> Is anyone having trouble with their RV 10 with a slow speed (decelerating
> on landing) shimmy in the nose wheel, 39down to35 mph say. The vibration
> is worse if braking on a down-hill part of the runway and worse with more
> rather than less flaps put in. We put new doughnuts in at the top of the
> strut, plus the washer Van sends. And the plane does better on level
> serfaces, especially if set with no flaps and with some weight in the
> back.
> We have replaced. shave where necessary, and balanced all three wheels
> (now Goodyear Customs), installed the new axel for the nosewheel, and, as
> I said, put a washer in at the top of the strut. Still there is that
> range of a bout 4 mph when slowing that comes right under 40 mph, where I
> am guessing the elevator loses its authority. Braking stops the vibration
> (getting under 30 mph). I am not sure what that does with weight
> distribution, just that is gets us slow enough the vibration stops. The
> vibration is a pronounced shimmy from the nose wheel.
>
> Installing a washer at the top of the nose strut helped for level
> surfaces, it seems, but an undulating runway can get the plane in a nose
> down attitude and at the right speed the shimmy is guaranteed to begin,
> as the plane slows below 40 mph. What about installing two washers at
> the top of the strut, instead of one? Or a small amount of weight in the
> tail? Has anyone changed out the nose strut to see if there was some
> bending in the old one? What's the fix? A heavier duty strut for the
> nose, a second washer in with the doughnuts, a weight in the tail, or
> just the installation of floats?
>
> This plane has an IO540 with a Hartzell CS
>
> And wisdom welcomed.
>
> WP flying RV 10 N814BW
|
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pitts_pilot(at)bellsouth.
Guest
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| Posted: Tue Aug 11, 2009 12:26 pm Post subject: RV10-List Digest: 18 Msgs - 08/10/09 |
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Actually makes it worse. Well, if we're talking about shimmy (nose tire
switching back and forth) .... which is what he described .... classic
symptoms. If the tire is bouncing due to being out of round ...... you
may be right.
Linn
Bob Turner wrote:
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msausen
Joined: 25 Oct 2007
Posts: 559
Location: Appleton, WI USA
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| Posted: Tue Aug 11, 2009 2:17 pm Post subject: RV10-List Digest: 18 Msgs - 08/10/09 |
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Ya, this is something that has been seen before on at least the RV's. A few have reported that once the wheel pant was balanced for/aft it was noticeably smoother. Not terribly difficult to do, just use some shot, nuts, whatever and make it permanent with epoxy.
Michael
--
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tc1234c(at)roadrunner.com
Guest
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| Posted: Tue Aug 11, 2009 3:52 pm Post subject: RV10-List Digest: 18 Msgs - 08/10/09 |
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All nose wheel RVs have nose shimming problem. There are a few videos showing the front and back vibration of nose gear. As the speed increases, the amplitude increases. In addition to whatever improvement you make on nose wheel/strut, different flying technique helps too. Try minimize the nose wheel run during take-off and landing will help improving the situation. I practice what Mike Seager taught: hold stick back before adding power at take off. Nose will pop up in a few seconds. Keep nose wheel slightly above runway to accelerate. Airplane will lift up when it is ready (no need to look down for rotation speed). After landing add power as necessary to keep nose wheel in the air until close to turn off. Remove power to drop the nose gently, with minimum braking. Braking hard will push the nose wheel down hard. I do this on my 9A and after 640 hrs tire on nose wheel looks new. I don't usually experience shimming (well, a few times I dropped nose wheel down too early and I did feel it).
On 8/11/2009 6:03 PM, RV Builder (Michael Sausen) wrote: [quote] [quote]--> RV10-List message posted by: "RV Builder (Michael Sausen)" <rvbuilder(at)sausen.net> (rvbuilder(at)sausen.net) Ya, this is something that has been seen before on at least the RV's. A few have reported that once the wheel pant was balanced for/aft it was noticeably smoother. Not terribly difficult to do, just use some shot, nuts, whatever and make it permanent with epoxy. Michael --
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partner14
Joined: 12 Jan 2008
Posts: 540
Location: Granbury Texas
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| Posted: Tue Aug 11, 2009 4:44 pm Post subject: RV10-List Digest: 18 Msgs - 08/10/09 |
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I would love to see someone in a 10 that has the luxury of ADDING power after touchdown to keep the nose wheel in the air. My problem isn't keeping the nose in the air, it's getting the plane slowed down enough to GET off the runway. My nose wheel is consistently off the runway for over a 1,000 ft after touchdown. This plane just doesn't like to slow down.
Anyone out there able to add power after touchdown?
Don McDonald
--- On Tue, 8/11/09, Ted Chang <tc1234c(at)roadrunner.com> wrote:
[quote]
From: Ted Chang <tc1234c(at)roadrunner.com>
Subject: Re: Re: RV10-List Digest: 18 Msgs - 08/10/09
To: rv10-list(at)matronics.com
Date: Tuesday, August 11, 2009, 4:46 PM
All nose wheel RVs have nose shimming problem. There are a few videos showing the front and back vibration of nose gear. As the speed increases, the amplitude increases. In addition to whatever improvement you make on nose wheel/strut, different flying technique helps too. Try minimize the nose wheel run during take-off and landing will help improving the situation. I practice what Mike Seager taught: hold stick back before adding power at take off. Nose will pop up in a few seconds. Keep nose wheel slightly above runway to accelerate. Airplane will lift up when it is ready (no need to look down for rotation speed). After landing add power as necessary to keep nose wheel in the air until close to turn off. Remove power to drop the nose gently, with minimum braking. Braking hard will push the nose wheel down hard. I do this on my 9A and after 640 hrs tire on nose wheel looks new. I don't usually experience shimming (well, a few times I dropped nose wheel down too early and I did feel it).
On 8/11/2009 6:03 PM, RV Builder (Michael Sausen) wrote: [quote][quote]--> RV10-List message posted by: "RV Builder (Michael Sausen)" <rvbuilder(at)sausen.net> (rvbuilder(at)sausen.net) Ya, this is something that has been seen before on at least the RV's. A few have reported that once the wheel pant was balanced for/aft it was noticeably smoother. Not terribly difficult to do, just use some shot, nuts, whatever and make it permanent with epoxy. Michael --
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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_________________
Don A. McDonald
40636 |
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rebrunk42(at)gmail.com
Guest
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| Posted: Tue Aug 11, 2009 4:44 pm Post subject: RV10-List Digest: 18 Msgs - 08/10/09 |
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I have found holding back on the stick removes the shimmy when I
experience it at times. Robert 661g
Sent from my iPhone
Robert E. Brunkenhoefer
Brunkenhoefer Law Firm, P.C.
520 Lawrence St.
Corpus Christi, Texas 78401
Phone: 361-888-8808
Facsimile: 361-888-6753
robert(at)brunklaw.com
On Aug 11, 2009, at 3:22 PM, Linn Walters <pitts_pilot(at)bellsouth.net>
wrote:
| Quote: |
>
Actually makes it worse. Well, if we're talking about shimmy (nose
tire switching back and forth) .... which is what he described ....
classic symptoms. If the tire is bouncing due to being out of
round ...... you may be right.
Linn
Bob Turner wrote:
>
> <bobturner(at)alum.rpi.edu>
> try running the nose tire at relatively low pressure.
> --------
> Bob Turner
> RV-10 QB
> Read this topic online here:
> http://forums.matronics.com/viewtopic.php?p 57153#257153
|
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Deems Davis
Joined: 09 Jan 2006
Posts: 925
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| Posted: Tue Aug 11, 2009 5:12 pm Post subject: RV10-List Digest: 18 Msgs - 08/10/09 |
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I'm with you Don, I routinely run a considerable portion of the runout
with the nosewheel off the ground and the stick in my belly trying to
help slow the bird. some of the problem is admittedly my getting used to
landing at a slower speed than previous a/c I've flown.
Deems Davis # 406
'Its all done....Its just not put together'
http://deemsrv10.com/
Don McDonald wrote:
[quote] I would love to see someone in a 10 that has the luxury of ADDING
power after touchdown to keep the nose wheel in the air. My problem
isn't keeping the nose in the air, it's getting the plane slowed down
enough to GET off the runway. My nose wheel is consistently off the
runway for over a 1,000 ft after touchdown. This plane just doesn't
like to slow down.
Anyone out there able to add power after touchdown?
Don McDonald
--- On *Tue, 8/11/09, Ted Chang /<tc1234c(at)roadrunner.com>/* wrote:
From: Ted Chang <tc1234c(at)roadrunner.com>
Subject: Re: Re: RV10-List Digest: 18 Msgs - 08/10/09
To: rv10-list(at)matronics.com
Date: Tuesday, August 11, 2009, 4:46 PM
All nose wheel RVs have nose shimming problem. There are a few
videos showing the front and back vibration of nose gear. As the
speed increases, the amplitude increases. In addition to whatever
improvement you make on nose wheel/strut, different flying
technique helps too. Try minimize the nose wheel run during
take-off and landing will help improving the situation. I practice
what Mike Seager taught: hold stick back before adding power at
take off. Nose will pop up in a few seconds. Keep nose wheel
slightly above runway to accelerate. Airplane will lift up when it
is ready (no need to look down for rotation speed). After landing
add power as necessary to keep nose wheel in the air until close
to turn off. Remove power to drop the nose gently, with minimum
braking. Braking hard will push the nose wheel down hard. I do
this on my 9A and after 640 hrs tire on nose wheel looks new. I
don't usually experience shimming (well, a few times I dropped
nose wheel down too early and I did feel it).
Ted Chang
RV9A flying, RV10 Wing
http://3limafoxtrot.com
my flight track:
http://www.mail2600.com/cgi-bin/track.cgi?call=KD8IIR&last=1
On 8/11/2009 6:03 PM, RV Builder (Michael Sausen) wrote:
>
>
> Ya, this is something that has been seen before on at least the RV's. A few have reported that once the wheel pant was balanced for/aft it was noticeably smoother. Not terribly difficult to do, just use some shot, nuts, whatever and make it permanent with epoxy.
>
> Michael
>
> --
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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pitts_pilot(at)bellsouth.
Guest
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| Posted: Tue Aug 11, 2009 5:22 pm Post subject: RV10-List Digest: 18 Msgs - 08/10/09 |
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Ted Chang wrote:
| Quote: | All nose wheel RVs have nose shimming problem.
They don't have to.
|
There are a few videos
| Quote: | showing the front and back vibration of nose gear. As the speed
increases, the amplitude increases. In addition to whatever improvement
you make on nose wheel/strut, different flying technique helps too.
If you can't tighten up the spindle nut, then add another set of the
|
Belleville washers. The way the washers are stacked (back to back,
belly to belly or nested) can also make a difference.
Try
| Quote: | minimize the nose wheel run during take-off and landing will help
improving the situation. I practice what Mike Seager taught: hold stick
back before adding power at take off. Nose will pop up in a few seconds.
Keep nose wheel slightly above runway to accelerate. Airplane will lift
up when it is ready (no need to look down for rotation speed). After
landing add power as necessary to keep nose wheel in the air until close
to turn off. Remove power to drop the nose gently, with minimum braking.
Braking hard will push the nose wheel down hard. I do this on my 9A and
after 640 hrs tire on nose wheel looks new.
All good advice.
|
I don't usually experience
| Quote: | shimming (well, a few times I dropped nose wheel down too early and I
did feel it).
Even that will go away with correct pressure on the spindle washers.
|
There is a very fine line between tight enough and not being able to
pull the airplane around on the ramp.
Linn
[quote]
Ted Chang
RV9A flying, RV10 Wing
http://3limafoxtrot.com
my flight track:
http://www.mail2600.com/cgi-bin/track.cgi?call=KD8IIR&last=1
On 8/11/2009 6:03 PM, RV Builder (Michael Sausen) wrote:
>
>
> Ya, this is something that has been seen before on at least the RV's. A few have reported that once the wheel pant was balanced for/aft it was noticeably smoother. Not terribly difficult to do, just use some shot, nuts, whatever and make it permanent with epoxy.
>
> Michael
>
> --
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http://www.matronics.com/Navigator?RV10-List |
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robin1(at)mrmoisture.com
Guest
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| Posted: Tue Aug 11, 2009 5:25 pm Post subject: RV10-List Digest: 18 Msgs - 08/10/09 |
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I believe once you have the tires & wheel pants balanced plus upgrade
the front axel all that is left is to refine your break out force. I
have all the above mentioned refinements but I notice that I have
significantly more shimmy now at 70 hours than I did at 50 hours. I
believe Tim made his first correction (tightening) to the break out
force around the 50-70 hour time frame to correct the weakening of the
break out force. I also vaguely remember that Tim later reported that he
had to re-adjust this less often after the initial tightening. I plan to
try and use my cool little portable luggage scale
http://www.balanzza.com/ to test and set the break out force for the
firs time since the 10 hour mark.
In regards to slowing down the plane once the mains touch I experience
such tremendous thrust from my stout XIO-540 and BA prop. No different
than controlling taxi speeds at rock bottom idle. The entire package is
so efficient that the plane just wants to accelerate.
Oh, by the way for those that are not flying yet, keep pounding, the
plane is spectacular.
Robin
--
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msausen
Joined: 25 Oct 2007
Posts: 559
Location: Appleton, WI USA
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| Posted: Tue Aug 11, 2009 5:43 pm Post subject: RV10-List Digest: 18 Msgs - 08/10/09 |
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Try turf that needs a haircut. 
Michael
Do not archive
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Don McDonald
Sent: Tuesday, August 11, 2009 7:35 PM
To: rv10-list(at)matronics.com
Subject: Re: Re: RV10-List Digest: 18 Msgs - 08/10/09
I would love to see someone in a 10 that has the luxury of ADDING power after touchdown to keep the nose wheel in the air. My problem isn't keeping the nose in the air, it's getting the plane slowed down enough to GET off the runway. My nose wheel is consistently off the runway for over a 1,000 ft after touchdown. This plane just doesn't like to slow down.
Anyone out there able to add power after touchdown?
Don McDonald
--- On Tue, 8/11/09, Ted Chang <tc1234c(at)roadrunner.com> wrote:
[quote]
From: Ted Chang <tc1234c(at)roadrunner.com>
Subject: Re: Re: RV10-List Digest: 18 Msgs - 08/10/09
To: rv10-list(at)matronics.com
Date: Tuesday, August 11, 2009, 4:46 PM
All nose wheel RVs have nose shimming problem. There are a few videos showing the front and back vibration of nose gear. As the speed increases, the amplitude increases. In addition to whatever improvement you make on nose wheel/strut, different flying technique helps too. Try minimize the nose wheel run during take-off and landing will help improving the situation. I practice what Mike Seager taught: hold stick back before adding power at take off. Nose will pop up in a few seconds. Keep nose wheel slightly above runway to accelerate. Airplane will lift up when it is ready (no need to look down for rotation speed). After landing add power as necessary to keep nose wheel in the air until close to turn off. Remove power to drop the nose gently, with minimum braking. Braking hard will push the nose wheel down hard. I do this on my 9A and after 640 hrs tire on nose wheel looks new. I don't usually experience shimming (well, a few times I dropped nose wheel down too early and I did feel it).
On 8/11/2009 6:03 PM, RV Builder (Michael Sausen) wrote: | Quote: | | --> RV10-List message posted by: "RV Builder (Michael Sausen)" <rvbuilder(at)sausen.net> Ya, this is something that has been seen before on at least the RV's. A few have reported that once the wheel pant was balanced for/aft it was noticeably smoother. Not terribly difficult to do, just use some shot, nuts, whatever and make it permanent with epoxy. MichaelRV9A flying, RV10 Wing |
0[quote]--
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partner14
Joined: 12 Jan 2008
Posts: 540
Location: Granbury Texas
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| Posted: Tue Aug 11, 2009 10:42 pm Post subject: RV10-List Digest: 18 Msgs - 08/10/09 |
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That's cheatin'.
--- On Tue, 8/11/09, RV Builder (Michael Sausen) <rvbuilder(at)sausen.net> wrote:
[quote]
From: RV Builder (Michael Sausen) <rvbuilder(at)sausen.net>
Subject: RE: Re: RV10-List Digest: 18 Msgs - 08/10/09
To: "rv10-list(at)matronics.com" <rv10-list(at)matronics.com>
Date: Tuesday, August 11, 2009, 6:40 PM
Try turf that needs a haircut.
Michael
Do not archive
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Don McDonald
Sent: Tuesday, August 11, 2009 7:35 PM
To: rv10-list(at)matronics.com
Subject: Re: Re: RV10-List Digest: 18 Msgs - 08/10/09
I would love to see someone in a 10 that has the luxury of ADDING power after touchdown to keep the nose wheel in the air. My problem isn't keeping the nose in the air, it's getting the plane slowed down enough to GET off the runway. My nose wheel is consistently off the runway for over a 1,000 ft after touchdown. This plane just doesn't like to slow down.
Anyone out there able to add power after touchdown?
Don McDonald
--- On Tue, 8/11/09, Ted Chang <tc1234c(at)roadrunner.com> wrote:
[quote]
From: Ted Chang <tc1234c(at)roadrunner.com>
Subject: Re: Re: RV10-List Digest: 18 Msgs - 08/10/09
To: rv10-list(at)matronics.com
Date: Tuesday, August 11, 2009, 4:46 PM
All nose wheel RVs have nose shimming problem. There are a few videos showing the front and back vibration of nose gear. As the speed increases, the amplitude increases. In addition to whatever improvement you make on nose wheel/strut, different flying technique helps too. Try minimize the nose wheel run during take-off and landing will help improving the situation. I practice what Mike Seager taught: hold stick back before adding power at take off. Nose will pop up in a few seconds. Keep nose wheel slightly above runway to accelerate. Airplane will lift up when it is ready (no need to look down for rotation speed). After landing add power as necessary to keep nose wheel in the air until close to turn off. Remove power to drop the nose gently, with minimum braking. Braking hard will push the nose wheel down hard. I do this on my 9A and after 640 hrs tire on nose wheel looks new. I don't usually experience shimming (well, a few times I dropped nose wheel down too early and I did feel it).
On 8/11/2009 6:03 PM, RV Builder (Michael Sausen) wrote:
| Quote: | | --> RV10-List message posted by: "RV Builder (Michael Sausen)" <rvbuilder(at)sausen.net> Ya, this is something that has been seen before on at least the RV's. A few have reported that once the wheel pant was balanced for/aft it was noticeably smoother. Not terribly difficult to do, just use some shot, nuts, whatever and make it permanent with epoxy. MichaelRV9A flying, RV10 Wing |
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Don A. McDonald
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partner14
Joined: 12 Jan 2008
Posts: 540
Location: Granbury Texas
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| Posted: Tue Aug 11, 2009 10:42 pm Post subject: RV10-List Digest: 18 Msgs - 08/10/09 |
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Deems, you need to change your signature message ---- 'Its all done...Its just not put together'... it better be put together, you're flying it.
Don
--- On Tue, 8/11/09, Deems Davis <deemsdavis(at)cox.net> wrote:
| Quote: |
From: Deems Davis <deemsdavis(at)cox.net>
Subject: Re: Re: RV10-List Digest: 18 Msgs - 08/10/09
To: rv10-list(at)matronics.com
Date: Tuesday, August 11, 2009, 6:02 PM
--> RV10-List message posted by: Deems Davis <deemsdavis(at)cox.net (deemsdavis(at)cox.net)>
I'm with you Don, I routinely run a considerable portion of the runout with the nosewheel off the ground and the stick in my belly trying to help slow the bird. some of the problem is admittedly my getting used to landing at a slower speed than previous a/c I've flown.
Deems Davis # 406
'Its all done....Its just not put together'
http://deemsrv10.com/
Don McDonald wrote:
| Quote: | I would love to see someone in a 10 that has the luxury of ADDING power after touchdown to keep the nose wheel in the air. My problem isn't keeping the nose in the air, it's getting the plane slowed down enough to GET off the runway. My nose wheel is consistently off the runway for over a 1,000 ft after touchdown. This plane just doesn't like to slow down.
Anyone out there able to add power after touchdown?
Don McDonald
--- On *Tue, 8/11/09, Ted Chang /<tc1234c(at)roadrunner.com (tc1234c(at)roadrunner.com)>/* wrote:
From: Ted Chang <tc1234c(at)roadrunner.com (tc1234c(at)roadrunner.com)>
Subject: Re: Re: RV10-List Digest: 18 Msgs - 08/10/09
To: rv10-list(at)matronics.com (rv10-list(at)matronics.com)
Date: Tuesday, August 11, 2009, 4:46 PM
All nose wheel RVs have nose shimming problem. There are a few
videos showing the front and back vibration of nose gear. As the
speed increases, the amplitude increases. In addition to whatever
improvement you make on nose wheel/strut, different flying
technique helps too. Try minimize the nose wheel run during
take-off and landing will help improving the situation. I practice
what Mike Seager taught: hold stick back before adding power at
take off. Nose will pop up in a few seconds. Keep nose wheel
slightly above runway to accelerate. Airplane will lift up when it
is ready (no need to look down for rotation speed). After landing
add power as necessary to keep nose wheel in the air until close
to turn off. Remove power to drop the nose gently, with minimum
braking. Braking hard will push the nose wheel down hard. I do
this on my 9A and after 640 hrs tire on nose wheel looks new. I
don't usually experience shimming (well, a few times I dropped
nose wheel down too early and I did feel it).
Ted Chang
RV9A flying, RV10 Wing
http://3limafoxtrot.com
my flight track:
http://www.mail2600.com/cgi-bin/track.cgi?call=KD8IIR&last=1
On 8/11/2009 6:03 PM, RV Builder (Michael Sausen) wrote:
> --> RV10-List message posted by: "RV Builder (Michael Sausen)" <rvbuilder(at)sausen.net (rvbuilder(at)sausen.net)>
>
> Ya, this is something that has been seen before on at least the RV's. A few have reported that once the wheel pant was balanced for/aft it was noticeably smoother. Not terribly difficult to do, just use some shot, nuts, whatever and make it permanent with epoxy.
>
> Michael
>
> -----Original Message-----
> From: owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com) [mailto:owner-rv10-list-server(at)matronics.com (owner-rv10-list-server(at)matronics.com)] On Behalf Of Pascal
> Sent: Tuesday, August 11, 2009 12:12 PM
> To: rv10-list(at)matronics.com (rv10-list(at)matronics.com)
> Subject: Re: Re: RV10-List Digest: 18 Msgs - 08/10/09
>
> --> RV10-List message posted by: "Pascal" <rv10builder(at)verizon.net (rv10builder(at)verizon.net)>
>
> Also - balance everything up front. balance the tires and balance the wheel pants.
> If it were me, I would take the pants off and test it if it still has a problem - balance the wheels- test it and see what happens if it solves the problem put the pants back on and see if the problem returns, if so balance the wheel pants.
> Pascal
>
> --------------------------------------------------
> From: "Linn Walters" <pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)>
> Sent: Tuesday, August 11, 2009 9:38 AM
> To: <rv10-list(at)matronics.com (rv10-list(at)matronics.com)>
> Subject: Re: Re: RV10-List Digest: 18 Msgs - 08/10/09
>
>
>> --> RV10-List message posted by: Linn Walters <pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)>
>>
>>
>> Wisdom: Tighten the spindle nut until you get at least 25 lb of drag measured at the axle. Might take more.
>> Linn
>>
>> Wyatt Prunty wrote:
>>
>>> --> RV10-List message posted by: "Wyatt Prunty" <wprunty(at)sewanee.edu (wprunty(at)sewanee.edu)>
>>>
>>> Is anyone having trouble with their RV 10 with a slow speed (decelerating on landing) shimmy in the nose wheel, 39down to35 mph say. The vibration is worse if braking on a down-hill part of the runway and worse with more rather than less flaps put in. We put new doughnuts in at the top of the strut, plus the washer Van sends. And the plane does better on level serfaces, especially if set with no flaps and with some weight in the back.
>>> We have replaced. shave where necessary, and balanced all three wheels (now Goodyear Customs), installed the new axel for the nosewheel, and, as I said, put a washer in at the top of the strut. Still there is that range of a bout 4 mph when slowing that comes right under 40 mph, where I am guessing the elevator loses its authority. Braking stops the vibration (getting under 30 mph). I am not sure what that does with weight distribution, just that is gets us slow enough the vibration stops. The vibration is a pronounced shimmy from the nose wheel.
>>>
>>> Installing a washer at the top of the nose strut helped for level surfaces, it seems, but an undulating runway can get the plane in a nose down attitude and at the right speed the shimmy is guaranteed to begin, as the plane slows below 40 mph. What about installing two washers at the top of the strut, instead of one? Or a small amount of weight in the tail? Has anyone changed out the nose strut to see if there was some bending in the old one? What's the fix? A heavier duty strut for the nose, a second washer in with the doughnuts, a weight in the tail, or just the installation of floats?
>>>
>>> This plane has an IO540 with a Hartzell CS
>>>
>>> And wisdom welcomed.
>>>
>>> WP flying RV 10 N814BW
>>>
>>
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Don A. McDonald
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