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Steering rod seal

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Jaybannist(at)cs.com
Guest

Posted: Sat Sep 09, 2006 2:22 pm Post subject: Steering rod seal

I am at the point of sealing the slots in the firewall (gravanized steel) for the steering rods, against air leakage and fire. I'm sure someone has solved this. There has been a lot of chatter about Honda boots, but that doesn't appeal to me.

   

 I am also concerned about the effect of the threads on any seal.  Has anyone ground down the threads to make the rods smooth in the vicinity of the slots?

 

 By the way, the dimensions shown on the drawings for the slots are wrong.  The rods are thicker than the width shown for the slots and the slots are much taller than required for the travel of the nose gear strut.  

 

 Jay in Dallas, working on XL fuselage N2620J  [quote][b]

nfivesl(at)yahoo.com
Guest

Posted: Sat Sep 09, 2006 4:42 pm Post subject: Steering rod seal

Hey Jay in Dallas:



I came up with another solution.  I didn't like the

threads rubbing on the seals either so I used a steel

rod and bored a hole in each end.  Then I turned down

a couple of bolts to insert into the steel rods:

http://www.cooknwithgas.com/11_28_04_SteeringRods2.JPG

http://www.cooknwithgas.com/11_28_04_SteeringRods.JPG

I had them chromed along with the pedals:

http://www.cooknwithgas.com/2_19_05_Pedals.jpg



I think they work well.  



Scott in Omaha. 

http://www.cooknwithgas.com/

--- Jaybannist(at)cs.com wrote:



 	  Quote: 	
		   I am at the point of sealing the slots in the

 firewall (gravanized steel) for 

 the steering rods, against air leakage and fire. I'm

 sure someone has solved 

 this. There has been a lot of chatter about Honda

 boots, but that doesn't 

 appeal to me.


	


__________________________________________________

Jaybannist(at)cs.com
Guest

Posted: Sat Sep 09, 2006 5:36 pm Post subject: Steering rod seal

Scott, Very neat!  I somtimes wish I had the ability to weld up parts like that, but I don't.  I just make do with what I've got

 

 Thanks - Jay  [quote][b]

tshank(at)core.com
Guest

Posted: Sat Sep 09, 2006 5:53 pm Post subject: Steering rod seal

Jay,

 I used a method without boots. I explained it before but here are a couple of picture. The important thing to remember is the rods don't have to be sealed until you are flying, if it leaks air while you are on the ground it doesn't make much difference. As you can see they are just two little doors that close when the weight is taken off the front wheel. To eliminate the noise of the threaded rod I found a piece of thin wall aluminum tubing in may stash of junk and slid them over the rods held in place with a couple of nuts.

 

 Tim Shankland

 

 Jaybannist(at)cs.com (Jaybannist(at)cs.com) wrote:

  	  Quote: 	
		  I am at the point of sealing the slots in the firewall (gravanized steel) for the steering rods, against air leakage and fire. I'm sure someone has solved this. There has been a lot of chatter about Honda boots, but that doesn't appeal to me.

   

 I am also concerned about the effect of the threads on any seal.  Has anyone ground down the threads to make the rods smooth in the vicinity of the slots?

   

 By the way, the dimensions shown on the drawings for the slots are wrong.  The rods are thicker than the width shown for the slots and the slots are much taller than required for the travel of the nose gear strut.  

   

 Jay in Dallas, working on XL fuselage N2620J       	  Quote:

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craig(at)craigandjean.com
Guest

Posted: Sat Sep 09, 2006 6:09 pm Post subject: Steering rod seal

Look in the list's photo/file archives for shots of a  couple of different solutions using metal shutters or  slides.

  

 -- Craig



   From: owner-zenith-list-server(at)matronics.com  [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of  Jaybannist(at)cs.com

Sent: Saturday, September 09, 2006 4:22  PM

To: zenith-list(at)matronics.com

Subject: Zenith-List:  Steering rod seal

 

I am at the point of sealing the slots in the  firewall (gravanized steel) for the steering rods, against air leakage and fire.  I'm sure someone has solved this. There has been a lot of chatter about Honda  boots, but that doesn't appeal to me.

  

I am also concerned about  the effect of the threads on any seal.  Has anyone ground down the threads  to make the rods smooth in the vicinity of the slots?



By the way, the  dimensions shown on the drawings for the slots are wrong.  The rods are  thicker than the width shown for the slots and the slots are much taller than  required for the travel of the nose gear strut.  



Jay in Dallas,  working on XL fuselage N2620J  	  Quote: 	
		  

	
   [quote][b]

601zv(at)ritternet.com
Guest

Posted: Sat Sep 09, 2006 6:13 pm Post subject: Steering rod seal

I used the Yamaha snowmobile boots with the rods  sleeved with aluminum tube riding in a brass bushing in the boot. But if you  don't like Honda you probably are anti-Yamaha too. Anyway, seems lile sleeving  the rods is an eary way to eliminate the rough threads. Here's where the scratch  builders have an advantage, as they can just use smooth solid rod with only the  end threaded instead of the all-thread that ZAC uses.

 [quote]   ---

cltvet(at)mail.ocis.net
Guest

Posted: Sat Sep 09, 2006 6:29 pm Post subject: Steering rod seal

Shrink wrap on rods and boots made of fireproof cloth same as fireman suits  

Lee  

701  

         

  

From: owner-zenith-list-server(at)matronics.com [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of Jaybannist(at)cs.com

 Sent: Saturday, September 09, 2006 3:22 PM

 To: zenith-list(at)matronics.com

 Subject: Steering rod seal  

  

   

I am at the point of sealing the slots in the firewall (gravanized steel) for the steering rods, against air leakage and fire. I'm sure someone has solved this. There has been a lot of chatter about Honda boots, but that doesn't appeal to me.

   

 I am also concerned about the effect of the threads on any seal.  Has anyone ground down the threads to make the rods smooth in the vicinity of the slots?

 

 By the way, the dimensions shown on the drawings for the slots are wrong.  The rods are thicker than the width shown for the slots and the slots are much taller than required for the travel of the nose gear strut.  

 

 Jay in Dallas, working on XL fuselage N2620J    	  Quote: 	
		     	
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larry(at)macsmachine.com
Guest

Posted: Sun Sep 10, 2006 6:07 am Post subject: Steering rod seal

Jay,

I made a couple of slider assemblies in which the center plate has a 

grommet that slides on the steering rods.  The center plate moves within 

the two slotted

plates and offers sufficient movement and sealing that cold air in 

winter cannot be felt nor does it impede movement of the rods. Very 

simple and two bolt assembly.

see links,

http://www.macsmachine.com/images/controllinkages/full/steer-rod-air-barrier.gif

http://www.macsmachine.com/images/controllinkages/full/steer-rod-air-barrier-2.gif



A little goop around the periphery of the attachment keeps it sealed at 

the firewall.



Larry McFarland - 601HDS at www.macsmachine.com



Jaybannist(at)cs.com wrote:



 	  Quote: 	
		   I am at the point of sealing the slots in the firewall (gravanized 

 steel) for the steering rods, against air leakage and fire. I'm sure 

 someone has solved this. There has been a lot of chatter about Honda 

 boots, but that doesn't appeal to me.

  

 I am also concerned about the effect of the threads on any seal.  Has 

 anyone ground down the threads to make the rods smooth in the vicinity 

 of the slots?



 By the way, the dimensions shown on the drawings for the slots are 

 wrong.  The rods are thicker than the width shown for the slots and 

 the slots are much taller than required for the travel of the nose 

 gear strut. 



 Jay in Dallas, working on XL fuselage N2620J



*

*

lgingell

Joined: 10 Jan 2006
Posts: 50
Location: Lake California Airpark 68CA

Posted: Sun Sep 10, 2006 7:58 am Post subject: Re: Steering rod seal

I filled the threads on the rods with JBWeld and smoothed them out that way.  It was quick, and works.



..lance

http://lancegingell.com/plane.asp

_________________
Zodiac XL/Jab 3300
http://lancegingell.com

Jaybannist(at)cs.com
Guest

Posted: Sun Sep 10, 2006 8:51 am Post subject: Steering rod seal

Lance,  VERY good suggestion!  Wish I had thought of it.  Definitely beats grinding the threads down.

 

 Thanks - Jay In Dallas

 Do not archive  [quote][b]

klaus(at)utdallas.edu
Guest

Posted: Mon Sep 11, 2006 8:10 am Post subject: Steering rod seal

Hi,



I used delrin slides. To prevent wear by the the threads, I covered them 

with

nylong tubing.  It has worked well for 1000 hrs of flying.



The following page has details:



http://www.utdallas.edu/~klaus/Airplane/nose_gear_delrin_slide.html



Best wishes,



Klaus



-- 

Klaus Truemper

Professor Emeritus of Computer Science

University of Texas at Dallas

Erik Jonsson School of Engineering and

  Computer Science EC31

P.O. Box 830688

Richardson, TX 75083-0688

(972) 883-2712

klaus(at)utdallas.edu

www.utdallas.edu/~klaus

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