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sarg314(at)gmail.com
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 Posted: Fri Sep 10, 2010 8:51 am Post subject: wheel shimmy fixed |
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Just a note for any one who may be having a wheel shimmy problem. (My apologies if everybody already knows this!)
My 6A only has about 7 hours on it. It had a pretty bad shimmy only upon landing after it slowed down a lot. I never determined if it was in the main gear or the nose gear. I tried reducing the nose wheel pressure as some one advised me, but that didn't work. Joe at Van's told me their 8A had a similar problem. It was fixed by reducing the main wheel pressure to 25 - 28 psi and the nose gear to 30 - 35. I originally had about 35psi all around. I tried his suggestion and have had no shimmy on the last 2 landings. An easy fix.
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Tom Sargent
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lifeofreiley2003(at)yahoo
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| Posted: Mon Sep 13, 2010 12:02 pm Post subject: wheel shimmy fixed |
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I don't know about the 6A, but 25-28 lbs on my 7A will take out the outer two tire treads in no time. I guess it could depend on the tire you're running too. A good friend adjusted the rake on his nose gear 6 degrees aft per an engineeers request and it fixed his problem and tire pressure was not an issue.
Best,
Darrell
--- On Fri, 9/10/10, thomas sargent <sarg314(at)gmail.com> wrote:
| Quote: |
From: thomas sargent <sarg314(at)gmail.com>
Subject: wheel shimmy fixed
To: "rv-list" <rv-list(at)matronics.com>
Date: Friday, September 10, 2010, 11:48 AM
Just a note for any one who may be having a wheel shimmy problem. (My apologies if everybody already knows this!)
My 6A only has about 7 hours on it. It had a pretty bad shimmy only upon landing after it slowed down a lot. I never determined if it was in the main gear or the nose gear. I tried reducing the nose wheel pressure as some one advised me, but that didn't work. Joe at Van's told me their 8A had a similar problem. It was fixed by reducing the main wheel pressure to 25 - 28 psi and the nose gear to 30 - 35. I originally had about 35psi all around. I tried his suggestion and have had no shimmy on the last 2 landings. An easy fix.
--
Tom Sargent
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llow target=_blank>http://www.matronics.com/contribution
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[quote][b]
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pitts_pilot(at)bellsouth.
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| Posted: Mon Sep 13, 2010 12:27 pm Post subject: wheel shimmy fixed |
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From my Grumman experience (castering nosewheel) the drag on the nose fork produced by the belleville washers directly affects the shimmy (side to side movement like a bad shopping cart) but tire pressure didn't seem to make much difference. 6 ply tires have a much stiffer sidewall and help some, but they're heavier. There are as many ways to stack the belleville washers as there are ways to corrosion proof. The best stack looks like |))((| ...... flat washers are '|' and bellevilles are '( and )'. The drag is measured with a spring scale at the axle, and can be anywhere from 18 - 25 pounds, with the best numbers on the high end. Nose gear shimmy will wear out a nose tire much faster than the mains.
Linn
On 9/13/2010 3:58 PM, Darrell Reiley wrote: [quote] I don't know about the 6A, but 25-28 lbs on my 7A will take out the outer two tire treads in no time. I guess it could depend on the tire you're running too. A good friend adjusted the rake on his nose gear 6 degrees aft per an engineeers request and it fixed his problem and tire pressure was not an issue.
Best,
Darrell
--- On Fri, 9/10/10, thomas sargent <sarg314(at)gmail.com> (sarg314(at)gmail.com) wrote:
| Quote: |
From: thomas sargent <sarg314(at)gmail.com> (sarg314(at)gmail.com)
Subject: wheel shimmy fixed
To: "rv-list" <rv-list(at)matronics.com> (rv-list(at)matronics.com)
Date: Friday, September 10, 2010, 11:48 AM
Just a note for any one who may be having a wheel shimmy problem. (My apologies if everybody already knows this!)
My 6A only has about 7 hours on it. It had a pretty bad shimmy only upon landing after it slowed down a lot. I never determined if it was in the main gear or the nose gear. I tried reducing the nose wheel pressure as some one advised me, but that didn't work. Joe at Van's told me their 8A had a similar problem. It was fixed by reducing the main wheel pressure to 25 - 28 psi and the nose gear to 30 - 35. I originally had about 35psi all around. I tried his suggestion and have had no shimmy on the last 2 landings. An easy fix.
--
Tom Sargent
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[b]
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http://www.matronics.com/Navigator?RV-List |
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