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Rudder hinge wear - solution anyone?

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mtherr(at)yahoo.com
Guest

Posted: Sat Jun 26, 2010 6:39 pm Post subject: Rudder hinge wear - solution anyone?

Hi group,



I mentionned about the rudder upper bearing (hinge) becoming loose with time.  I already replaced it once.  It appears somewhat loose again.  Did anyone invent a fix for this?



----------------------------

Michel Therrien CH601-HD, C-GZGQ

  http://mthobby.pcperfect.com/ch601

  http://pages.infinit.net/mthobby

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carlossa52(at)gmail.com
Guest

Posted: Sat Jun 26, 2010 7:38 pm Post subject: Rudder hinge wear - solution anyone?

How about that bearing that was discussed a few days ago? It was meant for the aileron bell crank, but maybe it could be used on the rudder...?

Salut bien



Carlos

On 26 June 2010 22:37, Michel Therrien <mtherr(at)yahoo.com (mtherr(at)yahoo.com)> wrote:

 [quote]--> Zenith601-List message posted by: Michel Therrien <mtherr(at)yahoo.com (mtherr(at)yahoo.com)>

  

 Hi group,

 

 I mentionned about the rudder upper bearing (hinge) becoming loose with time.  I already replaced it once.  It appears somewhat loose again.  Did anyone invent a fix for this?

 

 ----------------------------

 Michel Therrien CH601-HD, C-GZGQ

[b]

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bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Sun Jun 27, 2010 1:23 am Post subject: Rudder hinge wear - solution anyone?

Do you keep it greased?



On Jun 26, 2010, at 10:37 PM, Michel Therrien wrote:



 	  Quote: 	
		   

 

 Hi group,

 

 I mentionned about the rudder upper bearing (hinge) becoming loose with time.  I already replaced it once.  It appears somewhat loose again.  Did anyone invent a fix for this?

 


	


-- 

Bryan Martin

N61BM, CH 601 XL,

RAM Subaru, Stratus redrive.

do not archive.

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_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

larry(at)macsmachine.com
Guest

Posted: Sun Jun 27, 2010 6:47 am Post subject: Rudder hinge wear - solution anyone?

Michel Therrien wrote:

 	  Quote: 	
		   



 Hi group,



 I mentionned about the rudder upper bearing (hinge) becoming loose with time.  I already replaced it once.  It appears somewhat loose again.  Did anyone invent a fix for this?



 ----------------------------

 Michel Therrien CH601-HD, C-GZGQ

   http://mthobby.pcperfect.com/ch601

   http://pages.infinit.net/mthobby



 Michel,



         I had to machine new bushings. The paragraphs below, from my

 journal, describe, I believe, the same issue and my solution.



        



          The top bolt on the rudder rattled so the bolt was inspected and found to be worn and sloppy. 

   

     Began again today with removal of the rudder  I removed the press-fit bushing from the upper rudder plate by grinding a 3/16th inch Allen screw head to .250-diameter and used a 3/8-inch socket and nut to pull it 

 from the plate. Once home, I made 4 more bushings on the lathe that were 

 better lengths for the rudder bracket gap. The loose bolt had caused wear at the 

 top angle bracket holes and to the bolt.

   

>>

>> This morning, the first press fit of the best-length bushing went 

>> well. The same screw used to remove the former bushing was used to 

>> pull it to a force-fit into place. The rudder was placed on the 

>> upper bushing and bolted. The bottom bushing was replaced with a 

>> slightly longer one and it too was given a fresh new bolt. Both were 

>> snugged to stop bolt rotation and secured with castle nut and cotter 

>> pins. Now bolt and bushing were the only working surfaces as intended.

>>

>>  Larry McFarland 601HDS at www.macsmachine.com

>>

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mtherr(at)yahoo.com
Guest

Posted: Mon Jun 28, 2010 8:03 am Post subject: Rudder hinge wear - solution anyone?

Larry, I think I did it differently than you.. in my case, the upper plate rotates around the bushing that itself is captured in a fixed position between the two angles attached to the rudder.  The bolt does not rotate on any part.  

Are you saying that the bushing should stay "with" the upper plate attached to the fuselage and that the friction should be between the bolt and the bushing?  If so, that must be hard to lubricate...?

----------------------------

Michel Therrien CH601-HD, C-GZGQ

  http://mthobby.pcperfect.com/ch601

  http://pages.infinit.net/mthobby

--- On Sun, 6/27/10, Larry McFarland <larry(at)macsmachine.com> wrote:

 	  Quote: 	
		   From: Larry McFarland <larry(at)macsmachine.com>

 Subject: Re: Rudder hinge wear - solution anyone?

 To: zenith601-list(at)matronics.com

 Received: Sunday, June 27, 2010, 10:27 AM

 --> Zenith601-List message posted

 by: Larry McFarland <larry(at)macsmachine.com>

 Michel Therrien wrote:

 > 

 Therrien <mtherr(at)yahoo.com>

 > 

 > Hi group,

 > 

 > I mentionned about the rudder upper bearing (hinge)

 becoming loose with time.  I already replaced it

 once.  It appears somewhat loose again.  Did

 anyone invent a fix for this?

 > 

 > ----------------------------

 > Michel Therrien CH601-HD, C-GZGQ

 >   http://mthobby.pcperfect.com/ch601

 >   http://pages.infinit.net/mthobby

 > 

 > Michel,

 > 

 >         I had to machine

 new bushings. The paragraphs below, from my

 > journal, describe, I believe, the same issue and my

 solution.

 > 

 >        

 >          The top bolt on the

 rudder rattled so the bolt was inspected and found to be

 worn and sloppy.       Began again

 today with removal of the rudder  I removed the

 press-fit bushing from the upper rudder plate by grinding a

 3/16th inch Allen screw head to .250-diameter and used a

 3/8-inch socket and nut to pull it from the plate. Once

 home, I made 4 more bushings on the lathe that were better

 lengths for the rudder bracket gap. The loose bolt had

 caused wear at the top angle bracket holes and to the bolt.

 >   

 >>> 

 >>> This morning, the first press fit of the

 best-length bushing went well. The same screw used to remove

 the former bushing was used to pull it to a force-fit into

 place. The rudder was placed on the upper bushing and

 bolted. The bottom bushing was replaced with a slightly

 longer one and it too was given a fresh new bolt. Both were

 snugged to stop bolt rotation and secured with castle nut

 and cotter pins. Now bolt and bushing were the only working

 surfaces as intended.

 >>> 

 >>>  Larry McFarland 601HDS at

 www.macsmachine.com

 >>>       

 > 

 >   

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larry(at)macsmachine.com
Guest

Posted: Mon Jun 28, 2010 3:35 pm Post subject: Rudder hinge wear - solution anyone?

Michel,

The bushing was made as a press fit in the large plate. The bolt secures 

center within the bushing and was easy to lubricate by greasing the bolt 

on assembly.

The upper and lower plates held to center by the bolt are strong enough 

to not allow the bolt to rotate in them. The actual rotation forces are 

borne by

the largest surfaces of the bolt and inside the bushing. The top and 

bottom bushing surfaces are not strained at all in flight. Wear on my 

bolt occurred because

it was not tight and locked to allow no pivot within the upper and lower 

plates. The bolt now rotates with the rudder and the bushing is fixed by 

its fit

in the plate. I had to make 4 bushings to get it right. The bottom plate 

holds the rudder at elevation as well so that the top bushing isn't 

doing all the lifting.

If the bushing were allowed to rotate in the top and bottom plates, I 

believe wear would be a significant issue at the top pivot assembly.

Doubt bronze would be as good in holding a press fit and that's why I 

made mine of steel.



Larry McFarland 601HDS at www.macsmachine.com



Michel Therrien wrote:

 	  Quote: 	
		   



 Larry, I think I did it differently than you.. in my case, the upper plate rotates around the bushing that itself is captured in a fixed position between the two angles attached to the rudder.  The bolt does not rotate on any part.  



 Are you saying that the bushing should stay "with" the upper plate attached to the fuselage and that the friction should be between the bolt and the bushing?  If so, that must be hard to lubricate...?



  

 ----------------------------

 Michel Therrien CH601-HD, C-GZGQ

   http://mthobby.pcperfect.com/ch601

   http://pages.infinit.net/mthobby

- The Matronics Zenith601-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?Zenith601-List

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