The Murphy Builders Site

Almost everyone that has an amphib has had shimmy problems, unless they put
in enough wavy washers at the beginning to provide enough dampening. You
need enough to stop the shimmy, but not too many, to have difficulty
steering.

I've got well over 500 hours on mine, 99% on pavement, and still have tread.

Walter

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Wallace Wogenstahl
Sent: March 26, 2009 7:27 AM
To: rebel-builders@dcsol.com
Subject: [rebel-builders] wheel shimmy on 1800 amphibs

the other day I developed a shimmy in one of the front wheels on my 1800
amphibs . it took all the tred off the tire in one landing.has any one
elseever had this problem . Would like to know the cause and cure. WaLLY



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Problem with many of them, but I rarely land anywhere but grass so not a big
issue for me.

#1 keep the nose pivot shaft packed full of grease. Wavy washers should be
as tight as possible. If that doesn't do it.. take your front mounting block
off the nose leg and mill it about 3 to 5 degrees.. ream the mounting holes
a tad so the bolts don't bend and reinstall.

----- Original Message -----
From: "Wallace Wogenstahl" <rwogenstahl1@cinci.rr.com>
To: <rebel-builders@dcsol.com>
Sent: Thursday, March 26, 2009 10:26 AM
Subject: [rebel-builders] wheel shimmy on 1800 amphibs

the other day I developed a shimmy in one of the front wheels on my 1800
amphibs . it took all the tred off the tire in one landing.has any one
elseever had this problem . Would like to know the cause and cure. WaLLY



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Hi Wally !

Welcome to amphib flying ! This is a VERY common problem -
the answer is easy too ! Just add a couple of spring washers
under the bolt that supports the nosewheel, & tighten it up.

Check that bolt for tightness before every flight - or you'll
be buying a lot of tires ..... ;-) Be careful they don't sell
you the cheap 2-ply tires - look the same, but don't last !!

--
......bobp
bobp@prosumers.ca
http://www.prosumers.ca/Ramble09

http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com

-------------------------------orig.-------------------------
On Thursday 26 March 2009 14:26, Wallace Wogenstahl wrote:

the other day I developed a shimmy in one of the front wheels on my 1800
amphibs . it took all the tred off the tire in one landing.has any one
elseever had this problem . Would like to know the cause and cure. WaLLY

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And if you don't have more wavy washers to install handy... you can take a
lick off the end of the pivot shaft to shorten it... .so you'll need less
washers. My personal amphibs have almost 3/16" of play in the front shaft..
up/down... as received from MAM and lots of washers in there. If I landed on
pavement I'd fix that... but I don't and it steers so nice on the grass
loose.

----- Original Message -----
From: "Bob Patterson" <bobp@prosumers.ca>
To: <rebel-builders@dcsol.com>
Sent: Thursday, March 26, 2009 8:38 PM
Subject: Re: [rebel-builders] wheel shimmy on 1800 amphibs

Hi Wally !

Welcome to amphib flying ! This is a VERY common problem -
the answer is easy too ! Just add a couple of spring washers
under the bolt that supports the nosewheel, & tighten it up.

Check that bolt for tightness before every flight - or you'll
be buying a lot of tires ..... ;-) Be careful they don't sell
you the cheap 2-ply tires - look the same, but don't last !!

--
......bobp
bobp@prosumers.ca
http://www.prosumers.ca/Ramble09

http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com

-------------------------------orig.-------------------------
On Thursday 26 March 2009 14:26, Wallace Wogenstahl wrote:

the other day I developed a shimmy in one of the front wheels on my 1800
amphibs . it took all the tred off the tire in one landing.has any one
elseever had this problem . Would like to know the cause and cure. WaLLY

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Hey Bob; Hi again I just got a return call fromJeff at Murphy the washers
are on the way Exellent service from Murphy Wally.
----- Original Message -----
From: "Bob Patterson" <bobp@prosumers.ca>
To: <rebel-builders@dcsol.com>
Sent: Thursday, March 26, 2009 8:38 PM
Subject: Re: [rebel-builders] wheel shimmy on 1800 amphibs

Hi Wally !

Welcome to amphib flying ! This is a VERY common problem -
the answer is easy too ! Just add a couple of spring washers
under the bolt that supports the nosewheel, & tighten it up.

Check that bolt for tightness before every flight - or you'll
be buying a lot of tires ..... ;-) Be careful they don't sell
you the cheap 2-ply tires - look the same, but don't last !!

--
......bobp
bobp@prosumers.ca
http://www.prosumers.ca/Ramble09

http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com

-------------------------------orig.-------------------------
On Thursday 26 March 2009 14:26, Wallace Wogenstahl wrote:

the other day I developed a shimmy in one of the front wheels on my 1800
amphibs . it took all the tred off the tire in one landing.has any one
elseever had this problem . Would like to know the cause and cure. WaLLY

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Thanks Wally !

It's nice to hear a kind word ! :-)

I'm sure the guys at the factory appreciate it. They are really
stretched, with minimum staff doing their best to keep up.

Those washers, and a regular tightening, will stop your shimmy.

--
......bobp
bobp@prosumers.ca
http://www.prosumers.ca/Ramble09

http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com

-------------------------------orig.-------------------------
On Tuesday 31 March 2009 20:32, Wallace Wogenstahl wrote:

Hey Bob; Hi again I just got a return call fromJeff at Murphy the washers
are on the way Excellent service from Murphy Wally.

----- Original Message -----
From: "Bob Patterson" <bobp@prosumers.ca>
To: <rebel-builders@dcsol.com>
Sent: Thursday, March 26, 2009 8:38 PM
Subject: Re: [rebel-builders] wheel shimmy on 1800 amphibs

Hi Wally !

Welcome to amphib flying ! This is a VERY common problem -
the answer is easy too ! Just add a couple of spring washers
under the bolt that supports the nosewheel, & tighten it up.

Check that bolt for tightness before every flight - or you'll
be buying a lot of tires ..... ;-) Be careful they don't sell
you the cheap 2-ply tires - look the same, but don't last !!

--
......bobp
bobp@prosumers.ca
http://www.prosumers.ca/Ramble09

http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com

-------------------------------orig.-------------------------

On Thursday 26 March 2009 14:26, Wallace Wogenstahl wrote:

the other day I developed a shimmy in one of the front wheels on my
1800 amphibs . it took all the tred off the tire in one landing.has any
one elseever had this problem . Would like to know the cause and cure.
WaLLY

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Hi Bob; where do you find the spring washers , I have tried aircraft spruce,
hardware stores automotive stoes and Murphy Aircraft but no luck. Wally
----- Original Message -----
From: "Bob Patterson" <bobp@prosumers.ca>
To: <rebel-builders@dcsol.com>
Sent: Thursday, March 26, 2009 8:38 PM
Subject: Re: [rebel-builders] wheel shimmy on 1800 amphibs

Hi Wally !

Welcome to amphib flying ! This is a VERY common problem -
the answer is easy too ! Just add a couple of spring washers
under the bolt that supports the nosewheel, & tighten it up.

Check that bolt for tightness before every flight - or you'll
be buying a lot of tires ..... ;-) Be careful they don't sell
you the cheap 2-ply tires - look the same, but don't last !!

--
......bobp
bobp@prosumers.ca
http://www.prosumers.ca/Ramble09

http://bpatterson.qhealthbeauty.com
http://apatterson2.qhealthzone.com
http://apatterson2.ordermygift.com

-------------------------------orig.-------------------------
On Thursday 26 March 2009 14:26, Wallace Wogenstahl wrote:

the other day I developed a shimmy in one of the front wheels on my 1800
amphibs . it took all the tred off the tire in one landing.has any one
elseever had this problem . Would like to know the cause and cure. WaLLY

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