Steering Springs
 
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Steering Springs

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(@dsrothmac-com)
Posts: 52
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Past posts in this forum have advised that steering spring p/n 3239 are the ones to use.  I purchased a spring kit from Univair p/n U3239A-101 that is specified as a kit for Pipers.  It includes 2 springs, chain & 2 connector clips.  The only spring Univair shows for Stinsons is p/n 2632-SUB. The new springs I got are are more heavy duty overall than what are currently on my plane.  Do I have the correct springs?  Thanks!

David

 
Posted : 14/03/2020 9:40 pm
Will Ware (Webmaster ISC)
(@stinsono)
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Posts: 147
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B is the spring I'm using. The one in A looks like what is used on the Mail tailwheel.

My guess is that p/n 2632-sub is the individual spring. P/n 3239 is the entire kit.

Carl

 

 
Posted : 14/03/2020 10:35 pm
(@dsrothmac-com)
Posts: 52
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@stinsono

They are like the "B" spring except I would say heavier--made from larger wire.  The springs on my plane now look just like the "B" spring and these new ones are much stiffer.

The Univair 2632-sub Stinson spring looks to be lighter than what I got.  At least in their catalog picture.

What is the "A" spring?

 

 
Posted : 15/03/2020 12:13 am
Robert Picard
(@bob-picard)
Posts: 87
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Your spring choice depends on which tailwheel you have. The B springs are the ones commonly used with the Scott (now Bushweel) tailwheel. If you have an original equipment tailwheel or a Maule or other tailwheel you may use a different spring.

A little research somewhere on this site will yield you a lot of information and discussion concerning tailwheels, springs, and proper rigging to minimize shimmy.

 
Posted : 17/03/2020 5:56 pm
lawheelock
Posts: 777
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For my 1000th response to this question, the only correct steering springs for a 3200 tailwheel are P/N 3239.

 
Posted : 19/03/2020 1:30 am
lawheelock
Posts: 777
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Univair is not up to date.  The springs they quote are for the little bitty original scott 2000 tailwheel.  I have bought lots of p/n 3239 both from Univair and Spruce.  I am tired of having to repeat this over and over and over.  Please, people, do your own research and do not depend on a sales person who has never flown and maybe never seen a Stinson.

 
Posted : 19/03/2020 1:34 am
(@dsrothmac-com)
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@lawheelock

Yes, Larry, thanks. I hoped you would reply. I am the original poster & I did do my own research & wanted to verify that what I bought was correct.  I think it is.  Please read the first post of this thread.  David

 

 
Posted : 19/03/2020 2:30 am
(@dsrothmac-com)
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@lawheelock

The springs I got are much heavier than those pictures as "B" above. David

 

 
Posted : 19/03/2020 2:32 am
lawheelock
Posts: 777
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David,

I will attempt to post a photo of mine with the 3239 springs.  Install taught but not tight.

 

 
Posted : 19/03/2020 5:09 am
lawheelock
Posts: 777
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David, if yours are much heavier than in the reply photo above, you have the correct ones.  See my photo.

 
Posted : 19/03/2020 5:14 am
(@dsrothmac-com)
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@lawheelock

Thanks Larry.  I do have the correct springs.  Will be reworking my tailwheel installation today or tomorrow with a new leaf spring, new bracket assembly & bushings, 3239 springs & new chain & clips.  Will clean & regrease the 3200 tailwheel as well.   Thanks again.  David

 

 
Posted : 19/03/2020 2:35 pm
(@dsrothmac-com)
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I got the tailwheel components put all back together & now have a question about the rigging.  Proper rigging calls for the springs & chains to have no tension on them yet not be loose. This is giving me a lot of trouble getting right because the length of the chain is the only real adjustment and each chain link is approximately 1/2 inch in length.  3 links are too tight & 4 links are loose.  I know it's not supposed to be tight so I guess loose is the way it has to be.  Is there something I'm missing with this?  Thanks for any & all comments.  David

 
Posted : 21/03/2020 3:19 am
Posts: 300
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@dsrothmac-com  David, not sure if your airplane is a dash 3 like mine, but the geometry differs from the small tail Stinsons, and requires more chain lengths.  I have the same issue.  I have either 4 or 5 chain links on each side(I'll count them when I go out to my hangar this p.m.), which leaves a little slack in the linkage.  I figured better a little loose than to have tension.  Only issue is a little loosey-goosey when taxiing.   Dennis Crenshaw.  N6102M.

 

 
Posted : 21/03/2020 2:35 pm
Will Ware (Webmaster ISC)
(@stinsono)
Posts: 399
Honorable Member Admin
 

Check out Garys video from the Stinson Summit about tailwheel geometry 

https://youtu.be/AmD6iiQic84

 
Posted : 21/03/2020 2:40 pm
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