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Main Gear Spring Design

 
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Harvey Plummer



Joined: 21 Nov 2012
Posts: 28

PostPosted: Tue Nov 28, 2017 8:35 am    Post subject: Main Gear Spring Design Reply with quote

Is anyone flying with the van der Voort designed shock absorber design for
the maing gear. It looks like a good replacement for the BHP shock cord design. One concern that I have though is the clearance between the 1" OD tube and 3/4" OD tube. There is about .060" clearance between the tubes. Seems a little excessive. Anyone with experience with this?


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jarheadpilot82



Joined: 21 Mar 2011
Posts: 674
Location: Athens, GA

PostPosted: Tue Nov 28, 2017 5:24 pm    Post subject: Re: Main Gear Spring Design Reply with quote

Here is another option. This is what I have on my Piet project.

https://flycorvair.net/2012/10/27/new-die-spring-landing-gear-on-a-pietenpol-10-a-m-4-p-m/

If you are interested, I can send you the link where I purchased my die springs. $40.00 or so each, as I recall. Much less than Wag Aero or Wicks or ACS.


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PostPosted: Tue Nov 28, 2017 7:06 pm    Post subject: Main Gear Spring Design Reply with quote

Hi Guys,
I have just built one for my Wagabond Project.
Simple to build and looks good and strong.
Peter
Wonthaggi Australia


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On Wed, Nov 29, 2017 at 12:24 PM +1100, "jarheadpilot82" <jarheadpilot82(at)hotmail.com (jarheadpilot82(at)hotmail.com)> wrote:

Quote:
Quote:
--> Pietenpol-List message posted by: "jarheadpilot82"

Here is another option. This is what I have on my Piet project.

https://flycorvair.net/2012/10/27/new-die-spring-landing-gear-on-a-pietenpol-10-a-m-4-p-m/

If you are interested, I can send you the link where I purchased my die springs. $40.00 or so each, as I recall. Much less than Wag Aero or Wicks or ACS.

--------
Semper Fi,

Terry Hand
Athens, GA


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=475834#475834




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PostPosted: Tue Nov 28, 2017 7:17 pm    Post subject: Main Gear Spring Design Reply with quote

I did this and really liked the looks. I have yet to finish my plane.

BTW right now my concentration is on getting my commercial ticket next Wednesday.
Blue skies,
Steve D
On Nov 28, 2017 7:25 PM, "jarheadpilot82" <jarheadpilot82(at)hotmail.com (jarheadpilot82(at)hotmail.com)> wrote:
Quote:
--> Pietenpol-List message posted by: "jarheadpilot82" <jarheadpilot82(at)hotmail.com (jarheadpilot82(at)hotmail.com)>

Here is another option. This is what I have on my Piet project.

https://flycorvair.net/2012/10/27/new-die-spring-landing-gear-on-a-pietenpol-10-a-m-4-p-m/

If you are interested, I can send you the link where I purchased my die springs. $40.00 or so each, as I recall. Much less than Wag Aero or Wicks or ACS.

--------
Semper Fi,

Terry Hand
Athens, GA




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Harvey Plummer



Joined: 21 Nov 2012
Posts: 28

PostPosted: Wed Nov 29, 2017 11:21 am    Post subject: Re: Main Gear Spring Design Reply with quote

So which did you guys build? what Jarhead is suggesting or the van der Voort design I referred to?

Thanks.


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PostPosted: Wed Nov 29, 2017 12:46 pm    Post subject: Main Gear Spring Design Reply with quote

The same as the construction on WW’s site.
Cheers
Peter


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On Thu, Nov 30, 2017 at 6:21 AM +1100, "Harvey Plummer" <plummerharvey(at)yahoo.com (plummerharvey(at)yahoo.com)> wrote:

Quote:
Quote:
--> Pietenpol-List message posted by: "Harvey Plummer"

So which did you guys build? what Jarhead is suggesting or the van der Voort design I referred to?

Thanks.

--------
Harv, 485PB


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http://forums.matronics.com/viewtopic.php?p=475933#475933




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PostPosted: Wed Nov 29, 2017 5:48 pm    Post subject: Main Gear Spring Design Reply with quote

Drawing of the can  Not drawn to any scale whatsoever. 

On Nov 29, 2017 7:44 PM, "Steven Dortch" <steven.d.dortch(at)gmail.com (steven.d.dortch(at)gmail.com)> wrote:
Quote:
Here are my drawings of the setup. NOTE Not drawn to any scale known to man.

On Nov 29, 2017 2:49 PM, <vk3eka(at)bigpond.net.au (vk3eka(at)bigpond.net.au)> wrote:
Quote:
The same as the construction on WW’s site.
Cheers
Peter


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On Thu, Nov 30, 2017 at 6:21 AM +1100, "Harvey Plummer" <plummerharvey(at)yahoo.com (plummerharvey(at)yahoo.com)> wrote:

Quote:
Quote:
--> Pietenpol-List message posted by: "Harvey Plummer"

So which did you guys build? what Jarhead is suggesting or the van der Voort design I referred to?

Thanks.

--------
Harv, 485PB


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=475933#475933








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IMG_20171017_175521188.jpg
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IMG_20171017_175521188.jpg


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PostPosted: Wed Nov 29, 2017 5:49 pm    Post subject: Main Gear Spring Design Reply with quote

Another drawing. The measurements are in furlongs, cubits and pecks.

On Nov 29, 2017 7:47 PM, "Steven Dortch" <steven.d.dortch(at)gmail.com (steven.d.dortch(at)gmail.com)> wrote:
Quote:
Drawing of the can  Not drawn to any scale whatsoever. 

On Nov 29, 2017 7:44 PM, "Steven Dortch" <steven.d.dortch(at)gmail.com (steven.d.dortch(at)gmail.com)> wrote:
Quote:
Here are my drawings of the setup. NOTE Not drawn to any scale known to man.

On Nov 29, 2017 2:49 PM, <vk3eka(at)bigpond.net.au (vk3eka(at)bigpond.net.au)> wrote:
Quote:
The same as the construction on WW’s site.
Cheers
Peter


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On Thu, Nov 30, 2017 at 6:21 AM +1100, "Harvey Plummer" <plummerharvey(at)yahoo.com (plummerharvey(at)yahoo.com)> wrote:

Quote:
Quote:
--> Pietenpol-List message posted by: "Harvey Plummer"

So which did you guys build? what Jarhead is suggesting or the van der Voort design I referred to?

Thanks.

--------
Harv, 485PB


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=475933#475933










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IMG_20171017_175255442.jpg
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 Viewed:  237 Time(s)

IMG_20171017_175255442.jpg


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PostPosted: Wed Nov 29, 2017 5:50 pm    Post subject: Main Gear Spring Design Reply with quote

One more.

On Nov 29, 2017 7:49 PM, "Steven Dortch" <steven.d.dortch(at)gmail.com (steven.d.dortch(at)gmail.com)> wrote:
Quote:
Another drawing. The measurements are in furlongs, cubits and pecks.

On Nov 29, 2017 7:47 PM, "Steven Dortch" <steven.d.dortch(at)gmail.com (steven.d.dortch(at)gmail.com)> wrote:
Quote:
Drawing of the can  Not drawn to any scale whatsoever. 

On Nov 29, 2017 7:44 PM, "Steven Dortch" <steven.d.dortch(at)gmail.com (steven.d.dortch(at)gmail.com)> wrote:
Quote:
Here are my drawings of the setup. NOTE Not drawn to any scale known to man.

On Nov 29, 2017 2:49 PM, <vk3eka(at)bigpond.net.au (vk3eka(at)bigpond.net.au)> wrote:
Quote:
The same as the construction on WW’s site.
Cheers
Peter


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On Thu, Nov 30, 2017 at 6:21 AM +1100, "Harvey Plummer" <plummerharvey(at)yahoo.com (plummerharvey(at)yahoo.com)> wrote:

Quote:
Quote:
--> Pietenpol-List message posted by: "Harvey Plummer"

So which did you guys build? what Jarhead is suggesting or the van der Voort design I referred to?

Thanks.

--------
Harv, 485PB


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=475933#475933












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IMG_20171017_175207663.jpg
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IMG_20171017_175207663.jpg


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PostPosted: Wed Nov 29, 2017 6:15 pm    Post subject: Main Gear Spring Design Reply with quote

Once finished, is the interior lubricated/greased/protected from corrosion in any way? Also, it would appear that the spring has to be shorter than the can, how do you determine by how much, or am I looking at it wrong? Overall, I like the idea much better than the other spring designs I’ve seen.
Kip Gardner
Quote:
On Nov 29, 2017, at 8:47 PM, Steven Dortch <steven.d.dortch(at)gmail.com (steven.d.dortch(at)gmail.com)> wrote:
Drawing of the can Not drawn to any scale whatsoever.
On Nov 29, 2017 7:44 PM, "Steven Dortch" <steven.d.dortch(at)gmail.com (steven.d.dortch(at)gmail.com)> wrote:
Quote:
Here are my drawings of the setup. NOTE Not drawn to any scale known to man.
On Nov 29, 2017 2:49 PM, <vk3eka(at)bigpond.net.au (vk3eka(at)bigpond.net.au)> wrote:
Quote:
The same as the construction on WW’s site.

Cheers

Peter

Get Outlook for iOS


On Thu, Nov 30, 2017 at 6:21 AM +1100, "Harvey Plummer" <plummerharvey(at)yahoo.com (plummerharvey(at)yahoo.com)> wrote:
Quote:
Quote:
--> Pietenpol-List message posted by: "Harvey Plummer"

So which did you guys build? what Jarhead is suggesting or the van der Voort design I referred to?

Thanks.

--------
Harv, 485PB


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=475933#475933








<IMG_20171017_175521188.jpg>


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PostPosted: Wed Nov 29, 2017 6:35 pm    Post subject: Main Gear Spring Design Reply with quote

Kip,



The spring is 6 inches long, I made the tube 6 1/4 inches to take into account the welded cap on the end. I added another spacer to the top of the cap to provide a bit more of a gap so that nothing was damaged when welding the top cap. The cap, spacer and weld are slightly thicker that the 1/4 inch so I compressed the spring very slightly when I welded on the top cap. A little bit of compression stops any rattles when no load is applied.



I painted the long tube before welding the top cap in place. I intend to squirt some oil in the rod end hole (top) every now and again (say every annual) to stop the corrosion.



Cheers



Peter

Wonthaggi Australia

http://www.cpc-world.com









From: <owner-pietenpol-list-server(at)matronics.com> on behalf of Kip Gardner <kipgohio1957(at)gmail.com>
Reply-To: <pietenpol-list(at)matronics.com>
Date: Thursday, 30 November 2017 at 1:14 pm
To: <pietenpol-list(at)matronics.com>
Subject: Re: Re: Main Gear Spring Design



Once finished, is the interior lubricated/greased/protected from corrosion in any way? Also, it would appear that the spring has to be shorter than the can, how do you determine by how much, or am I looking at it wrong? Overall, I like the idea much better than the other spring designs I’ve seen.



Kip Gardner



On Nov 29, 2017, at 8:47 PM, Steven Dortch <steven.d.dortch(at)gmail.com> wrote:



Drawing of the can Not drawn to any scale whatsoever.



On Nov 29, 2017 7:44 PM, "Steven Dortch" <steven.d.dortch(at)gmail.com> wrote:

Here are my drawings of the setup. NOTE Not drawn to any scale known to man


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PostPosted: Wed Nov 29, 2017 6:48 pm    Post subject: Main Gear Spring Design Reply with quote

Peter,
Thanks, that all makes perfect sense, even to me Smile !

Kip
Quote:
On Nov 29, 2017, at 9:34 PM, Peter Johnson <vk3eka(at)bigpond.net.au (vk3eka(at)bigpond.net.au)> wrote:
Kip,

The spring is 6 inches long, I made the tube 6 1/4 inches to take into account the welded cap on the end. I added another spacer to the top of the cap to provide a bit more of a gap so that nothing was damaged when welding the top cap. The cap, spacer and weld are slightly thicker that the 1/4 inch so I compressed the spring very slightly when I welded on the top cap. A little bit of compression stops any rattles when no load is applied.

I painted the long tube before welding the top cap in place. I intend to squirt some oil in the rod end hole (top) every now and again (say every annual) to stop the corrosion.

Cheers

Peter
Wonthaggi Australia
http://www.cpc-world.com




From: <owner-pietenpol-list-server(at)matronics.com (owner-pietenpol-list-server(at)matronics.com)> on behalf of Kip Gardner <kipgohio1957(at)gmail.com (kipgohio1957(at)gmail.com)>Reply-To: <pietenpol-list(at)matronics.com (pietenpol-list(at)matronics.com)>Date: Thursday, 30 November 2017 at 1:14 pmTo: <pietenpol-list(at)matronics.com (pietenpol-list(at)matronics.com)>Subject: Re: Re: Main Gear Spring Design



Once finished, is the interior lubricated/greased/protected from corrosion in any way? Also, it would appear that the spring has to be shorter than the can, how do you determine by how much, or am I looking at it wrong? Overall, I like the idea much better than the other spring designs I’ve seen.


Kip Gardner


Quote:
On Nov 29, 2017, at 8:47 PM, Steven Dortch <steven.d.dortch(at)gmail.com (steven.d.dortch(at)gmail.com)> wrote:


Drawing of the can Not drawn to any scale whatsoever.


On Nov 29, 2017 7:44 PM, "Steven Dortch" <steven.d.dortch(at)gmail.com (steven.d.dortch(at)gmail.com)> wrote:
Quote:
Here are my drawings of the setup. NOTE Not drawn to any scale known to man.


On Nov 29, 2017 2:49 PM, <vk3eka(at)bigpond.net.au (vk3eka(at)bigpond.net.au)> wrote:
Quote:
The same as the construction on WW’s site.



Cheers



Peter


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On Thu, Nov 30, 2017 at 6:21 AM +1100, "Harvey Plummer" <plummerharvey(at)yahoo.com (plummerharvey(at)yahoo.com)> wrote:
Quote:
Quote:
--> Pietenpol-List message posted by: "Harvey Plummer" So which did you guys build? what Jarhead is suggesting or the van der Voort design I referred to? Thanks. --------Harv, 485PB
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<IMG_20171017_175521188.jpg>



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PostPosted: Wed Nov 29, 2017 8:24 pm    Post subject: Main Gear Spring Design Reply with quote

The spring is under compression. When we welded one, either a drop of slag
got in the way or there was a tiny weld to the spring. No movement. I fixed
it by chaining it between two truck bumpers and giving it a jerk. It worked


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PostPosted: Mon Dec 04, 2017 3:59 pm    Post subject: Re: Main Gear Spring Design Reply with quote

the link Terry supplied does have all the measurements and details of the construction...

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