Today's Message Index:
----------------------
1. 05:57 AM - Ammeter shunt (Grenwis@AOL.COM)
2. 06:05 PM - New Nose Gear Leg & Fork Shimmy Issue (Robin Marks)
3. 06:31 PM - Re: New Nose Gear Leg & Fork Shimmy Issue (Dale Walter)
4. 07:09 PM - Re: New Nose Gear Leg & Fork Shimmy Issue (Bobby Hester)
5. 07:09 PM - Re: New Nose Gear Leg & Fork Shimmy Issue (Bobby Hester)
6. 10:05 PM - Re: New Nose Gear Leg & Fork Shimmy Issue (Ron Lee)
7. 10:16 PM - Re: New Nose Gear Leg & Fork Shimmy Issue (Robin Marks)
8. 10:54 PM - Re: New Nose Gear Leg & Fork Shimmy Issue (Vanremog@aol.com)
9. 11:12 PM - O 320 H2AD on 7/6-A (Lucio Castrogiovanni)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Can the ammeter shunt from Van's mount directly to aluminum because it has
an isolated base, or does it need to be mounted on some isolating material to
stand it off from the aluminum? Tnx.
Rick
**************Biggest Grammy Award surprises of all time on AOL Music.
(http://music.aol.com/grammys/pictures/never-won-a-grammy?NCID=aolcmp003000000025
48)
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | New Nose Gear Leg & Fork Shimmy Issue |
My 6A just came out of annual with the updated nose gear & fork.
Unfortunately there is now a severe shimmy upon landing*. So severe that
I was wondering if the tire was rolling off the rim with a good slapping
sound. Not a good feeling.
As part of the annual I replaced both main tires & tubes but the nose
wheel tire is the same as before the annual when all was well. I do
notice that the front leg fairing is much closer to the nose wheel pant
and has caused some abrasions on the top of the pant as they are now
probably in contact with my added weight.
The plane taxi's well and reasonably high speed taxing did not reveal
the shimmy but there is definitely a problem. Any suggestions are
appreciated.
Robin
*Perfect landing holding off the nose till I had no more authority.
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | New Nose Gear Leg & Fork Shimmy Issue |
My last shimmy was caused by a tire that was slightly out of round. If you
hold the nose up till pitch control is gone, you may allow the nose wheel to
drop hard enough to start an oscillation from the leg springing, it has
happened to me. If you let the pressure get too low I have had the tire slip
on the rim and tear the valve stem, and it took 2 days to go flat. If your
tire is making noise maybe it developed a bump (hernia). Have someone push
the tail down and raise the nose tire 4 inches and release while you watch.
Good inspection for fairing clearances.
Dale
RV6a 986 hrs
_____
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com] On Behalf Of Robin Marks
Sent: Thursday, February 07, 2008 9:00 PM
Subject: RV-List: New Nose Gear Leg & Fork Shimmy Issue
My 6A just came out of annual with the updated nose gear & fork.
Unfortunately there is now a severe shimmy upon landing*. So severe that I
was wondering if the tire was rolling off the rim with a good slapping
sound. Not a good feeling.
As part of the annual I replaced both main tires & tubes but the nose wheel
tire is the same as before the annual when all was well. I do notice that
the front leg fairing is much closer to the nose wheel pant and has caused
some abrasions on the top of the pant as they are now probably in contact
with my added weight.
The plane taxi's well and reasonably high speed taxing did not reveal the
shimmy but there is definitely a problem. Any suggestions are appreciated.
Robin
*Perfect landing holding off the nose till I had no more authority.
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: New Nose Gear Leg & Fork Shimmy Issue |
Could be that the axle nuts are too tight and not allowing the tire to
spin properly.
Rise the tail and spin the tire by hand you should be able to make it
spin at least one complete turn. I have found that they need to be
torqued at min torque that is called out on the print. I don't have that
handy, thinking it might be 85 in lbs..
----
Surfing the web from Hopkinsville, KY
Visit my flying RV7A web page:
http://home.newwavecomm.net/bobbyhester/MyFlyingRV7A.htm
Dale Walter wrote:
>
> My last shimmy was caused by a tire that was slightly out of round. If
> you hold the nose up till pitch control is gone, you may allow the
> nose wheel to drop hard enough to start an oscillation from the leg
> springing, it has happened to me. If you let the pressure get too low
> I have had the tire slip on the rim and tear the valve stem, and it
> took 2 days to go flat. If your tire is making noise maybe it
> developed a bump (hernia). Have someone push the tail down and raise
> the nose tire 4 inches and release while you watch. Good inspection
> for fairing clearances.
>
> Dale
>
> RV6a 986 hrs
>
>
>
> ------------------------------------------------------------------------
>
> *From:* owner-rv-list-server@matronics.com
> [mailto:owner-rv-list-server@matronics.com] *On Behalf Of *Robin Marks
> *Sent:* Thursday, February 07, 2008 9:00 PM
> *To:* rv-list@matronics.com
> *Subject:* RV-List: New Nose Gear Leg & Fork Shimmy Issue
>
>
>
> My 6A just came out of annual with the updated nose gear & fork.
> Unfortunately there is now a severe shimmy upon landing*. So severe
> that I was wondering if the tire was rolling off the rim with a good
> slapping sound. Not a good feeling.
>
> As part of the annual I replaced both main tires & tubes but the nose
> wheel tire is the same as before the annual when all was well. I do
> notice that the front leg fairing is much closer to the nose wheel
> pant and has caused some abrasions on the top of the pant as they are
> now probably in contact with my added weight.
>
> The plane taxi's well and reasonably high speed taxing did not reveal
> the shimmy but there is definitely a problem. Any suggestions are
> appreciated.
>
>
>
> Robin
>
>
>
> *Perfect landing holding off the nose till I had no more authority.
>
> * *
> * *
> **
> **
> **
> **
> **
> **
> **
> *http://www.matronics.com/contribution*
> * *
> *
>
>
> *
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: New Nose Gear Leg & Fork Shimmy Issue |
Could be that the axle nuts are too tight and not allowing the tire to
spin properly.
Rise the tail and spin the tire by hand you should be able to make it
spin at least one complete turn. I have found that they need to be
torqued at min torque that is called out on the print. I don't have that
handy, thinking it might be 85 in lbs..
----
Surfing the web from Hopkinsville, KY
Visit my flying RV7A web page:
http://home.newwavecomm.net/bobbyhester/MyFlyingRV7A.htm
Dale Walter wrote:
>
> My last shimmy was caused by a tire that was slightly out of round. If
> you hold the nose up till pitch control is gone, you may allow the
> nose wheel to drop hard enough to start an oscillation from the leg
> springing, it has happened to me. If you let the pressure get too low
> I have had the tire slip on the rim and tear the valve stem, and it
> took 2 days to go flat. If your tire is making noise maybe it
> developed a bump (hernia). Have someone push the tail down and raise
> the nose tire 4 inches and release while you watch. Good inspection
> for fairing clearances.
>
> Dale
>
> RV6a 986 hrs
>
>
>
> ------------------------------------------------------------------------
>
> *From:* owner-rv-list-server@matronics.com
> [mailto:owner-rv-list-server@matronics.com] *On Behalf Of *Robin Marks
> *Sent:* Thursday, February 07, 2008 9:00 PM
> *To:* rv-list@matronics.com
> *Subject:* RV-List: New Nose Gear Leg & Fork Shimmy Issue
>
>
>
> My 6A just came out of annual with the updated nose gear & fork.
> Unfortunately there is now a severe shimmy upon landing*. So severe
> that I was wondering if the tire was rolling off the rim with a good
> slapping sound. Not a good feeling.
>
> As part of the annual I replaced both main tires & tubes but the nose
> wheel tire is the same as before the annual when all was well. I do
> notice that the front leg fairing is much closer to the nose wheel
> pant and has caused some abrasions on the top of the pant as they are
> now probably in contact with my added weight.
>
> The plane taxi's well and reasonably high speed taxing did not reveal
> the shimmy but there is definitely a problem. Any suggestions are
> appreciated.
>
>
>
> Robin
>
>
>
> *Perfect landing holding off the nose till I had no more authority.
>
> * *
> * *
> **
> **
> **
> **
> **
> **
> **
> *http://www.matronics.com/contribution*
> * *
> *
>
>
> *
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: New Nose Gear Leg & Fork Shimmy Issue |
The two most likely issues are out of balance and out of round. Since
it is a new tire I would guess out of balance. It is easy to tell the
difference
between one or both of those and shimmy from the outside while taxiing
Ron Lee
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | New Nose Gear Leg & Fork Shimmy Issue |
I am fairly sure the shimmy is unrelated to a tire issue as I have had
zero issues with the exact same tire before the annual (0.2 hours ago).
I will test the rotation in the AM. I have read about the axel nut
torque in the past so I will check that too.
When I let the front wheel down it was not a drop but rather a near
perfect landing right before the violent shimmy.
Thanks,
Robin
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: New Nose Gear Leg & Fork Shimmy Issue |
In a message dated 2/7/2008 10:18:26 P.M. Pacific Standard Time,
robin1@mrmoisture.com writes:
I am fairly sure the shimmy is unrelated to a tire issue as I have had zero
issues with the exact same tire before the annual (0.2 hours ago). I will test
the rotation in the AM. I have read about the axle nut torque in the past so I
will check that too.
When I let the front wheel down it was not a drop but rather a near perfect
landing right before the violent shimmy.
==============================================
And your castoring "breakout" force is still the same? Did you over grease
the pivot joint? Is the mounting hole to the engine mount getting sloppy?
N1GV (RV-6A, Flying 883hrs, O-360-A1A, C/S, Silicon Valley)
**************Biggest Grammy Award surprises of all time on AOL Music.
(http://music.aol.com/grammys/pictures/never-won-a-grammy?NCID=aolcmp003000000025
48)
Message 9
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | O 320 H2AD on 7/6-A |
Hi Folk;=0AIs there any builder who fly an RV-7A or 6A with O320 H2AD ? If
yes ... any problem or difficulty with mount and cowl?=0A=0Agood time at al
l=0A=0ALucio=0A=0A=0A ___________________________________ =0AL'email d
ella prossima generazione? Puoi averla con la nuova Yahoo! Mail: http://it.
docs.yahoo.com/nowyoucan.html
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|