Date   
Re: Coupler boxes

Jim King
 

I introduced cast urethane coupler boxes last year.  You can find these on my web page here:

 

http://www.smokymountainmodelworks.com/HO_draft_gear+cplrs.html

 

Jim King

www.smokymountainmodelworks.com

 


--
Jim King
www.smokymountainmodelworks.com

Re: Coupler boxes

Calvin Monaghan
 

Jim, just out of curiosity- would these boxes also work for Kadees?

Calvin 


On May 28, 2019, at 10:59, Jim King <jimking3@...> wrote:

I introduced cast urethane coupler boxes last year.  You can find these on my web page here:

 

http://www.smokymountainmodelworks.com/HO_draft_gear+cplrs.html

 

Jim King

www.smokymountainmodelworks.com

 


--
Jim King
www.smokymountainmodelworks.com

Re: Coupler boxes

Jim King
 

I made 2 styles (Sergent/Accurail and Kadee).  Available in grey, brown and black.

 

Jim King

www.smokymountainmodelworks.com

 


--
Jim King
www.smokymountainmodelworks.com

Re: Coupler boxes

Dave Yingst
 

The smokey mountain draft gear boxes look really good. Put them on a red caboose PFE  reefer and it really improved the look of the end. No connection just a satisfied user.

Dave Yingst
Corning CA

Re: Coupler boxes

Jim King
 

Thanks, Dave.

 

Jim King

www.smokymountainmodelworks.com

 


--
Jim King
www.smokymountainmodelworks.com

New file uploaded to SergentEngineering@groups.io

SergentEngineering@groups.io Notification <SergentEngineering+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the SergentEngineering@groups.io group.

File: Sergent Engineering EN87 - Uncoupler.zip

Uploaded By: Timothy Cann

Description:
MP4 video of an uncoupler operating

You can access this file at the URL:
https://groups.io/g/SergentEngineering/files/Sergent%20Engineering%20EN87%20-%20Uncoupler.zip

Cheers,
The Groups.io Team

Uncoupler

Timothy Cann
 

It has been my goal over the past six months or so to build an uncoupler that could be used manually (like the prototype), or automated under DCC control. My hope has been to have the uncoupler look and operate as close to the prototype as possible. This project has taken me down numerous paths looking for the right hardware that could be driven by a standard DCC decoder using one LED driver for each end of the car.
And yes, I’m aware that this is probably not a practical thing to do, especially because of the cost, and those of you who are firmly of this mind can remind me as often as you like. Managing the DCC addresses (two per car) is also going to be a challenge during operating sessions.

Kadee couplers were my choice at the beginning, but as soon as Sergent Engineering couplers came to my attention, I’ve never looked back. Their magnetic uncoupling design seemed a natural for my project. There are uncoupler designs on the Internet that use Kadee, I built several of them, but for my taste they simply did not look or operate like the prototype. If any of you are interested in the steps taken to come to this conclusion, I’d be glad to summarize the steps.

I’ve now successfully built a prototype using EN87 couplers, built after many hours of SolidWorks 3D design work. My next step is to finish at least two cars and an engine, including painting and weathering, so a video can be produced showing the operation. Some parts are purchased, some are 3D printed (my Anycubic Photon, a liquid resin printer, meets the detail and size required).
There is no motivation for me to get any financial gain; my design will be posted to this website when I’ve completed the documentation, including the 3D printed parts’ printer files. Final documentation will include the source of each of the purchased parts along with the cost. It looks like the cost per car to add the DCC and mechanical parts for two couplers is about $100, but that number is by no means final. I’m using all brass rolling stock, which puts the cost per car including the car itself, couplers, electrical 4-wheel trucks, mechanical parts and DCC decoder at about $300 minimum.

To my delight this design can be used without DCC, simply move one of the handles to lower and raise the magnet, just like the prototype. The only thing that is not prototypical is the uncouple operation is backwards: lever down = uncouple, while the prototype is lever up = uncouple.

Included with this post is a SolidWorks animation (MP4 zipped) to show how this works.  It's posted in the Files section.

Re: Uncoupler

Talmadge C 'TC' Carr
 

Are you using a function only decoder? Would one of those per car lower the cost any?

Talmadge C 'TC' Carr
Sn42 and Hn42 somewhere in the wilds of the Pacific Northwest
@dapenguin

Re: Uncoupler

Talmadge C 'TC' Carr
 

Have you thought about a cam to reverse the direction between the rod and the "lifter"?

Talmadge C 'TC' Carr
Sn42 and Hn42 somewhere in the wilds of the Pacific Northwest
@dapenguin

The only thing that is not prototypical is the uncouple operation is backwards: lever down = uncouple, while the prototype is lever up = uncouple.

Re: Uncoupler

Mark
 

What a terrific development.  I have been following a model railway called Mckinley railway.  They use kaydee’s and years ago developed a uncoupled for their switching engines.   I personally would love to have an uncoupled that just we’re on locos alone.  In fact both ends uncoupling together all the time would suit me just fine.   For car to car uncoupling I’d be just as satisfied to use the standard wand for car to car uncoupling.   That way the decoders on board do the vast majority of the uncoupling without the complexity.

a hybrid solution.

Re: Uncoupler

Timothy Cann
 

The function-only decoders that I've tested are meant for driving LED's.  The lights functions of most loco decoders are designed for the extra current surge typical of grain-of-wheat incandescent bulbs.  My hardware requires 100mA per uncoupler (intermittent) and it's taken a lot for me to get it that low.  The function only decoders just don't measure up (that I've tested).  The non-prototypical "cut lever down" to uncouple is driven by the way the Sergent Engineering couplers uncouple: the magnet must be near the coupler's top surface.

As for engine-only use, yes that would be a great operational compromise to reduce cost.  My hardware will fit into most tenders, but definitely would not in most steam locos.  Even diesels would be a space challenge.

Tim 

New file uploaded to SergentEngineering@groups.io

SergentEngineering@groups.io Notification <SergentEngineering+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the SergentEngineering@groups.io group.

File: Uncoupler Components Detail.pdf

Uploaded By: Timothy Cann

Description:
Uncoupler - 2nd post - all posts from here on will be uploaded to a folder named Uncoupler in the files section.

You can access this file at the URL:
https://groups.io/g/SergentEngineering/files/Uncoupler%20Components%20Detail.pdf

Cheers,
The Groups.io Team

New file uploaded to SergentEngineering@groups.io

SergentEngineering@groups.io Notification <SergentEngineering+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the SergentEngineering@groups.io group.

File: Couple - Then Uncouple - Inside Shown - Levers.zip

Uploaded By: Timothy Cann

Description:
Uncoupler - 2nd post - all posts from here on will be uploaded to a folder named Uncoupler in the files section.

You can access this file at the URL:
https://groups.io/g/SergentEngineering/files/Couple%20-%20Then%20Uncouple%20-%20Inside%20Shown%20-%20Levers.zip

Cheers,
The Groups.io Team

New file uploaded to SergentEngineering@groups.io

SergentEngineering@groups.io Notification <SergentEngineering+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the SergentEngineering@groups.io group.

File: Uncoupler Parts ID.pdf

Uploaded By: Timothy Cann

Description:
Uncoupler Cost - Purchase Parts The next post will identify 3D printed parts and include the STL source files.

You can access this file at the URL:
https://groups.io/g/SergentEngineering/files/Uncoupler/Uncoupler%20Parts%20ID.pdf

Cheers,
The Groups.io Team

New file uploaded to SergentEngineering@groups.io

SergentEngineering@groups.io Notification <SergentEngineering+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the SergentEngineering@groups.io group.

File: Uncoupler Cost.pdf

Uploaded By: Timothy Cann

Description:
Uncoupler Cost - Purchase Parts The next post will identify 3D printed parts and include the STL source files.

You can access this file at the URL:
https://groups.io/g/SergentEngineering/files/Uncoupler/Uncoupler%20Cost.pdf

Cheers,
The Groups.io Team

New file uploaded to SergentEngineering@groups.io

SergentEngineering@groups.io Notification <SergentEngineering+notification@...>
 

Hello,

This email message is a notification to let you know that a file has been uploaded to the Files area of the SergentEngineering@groups.io group.

File: 3D Printed Parts Instructions.zip

Uploaded By: Timothy Cann

Description:
This is my final posting until a video of actual rolling stock being uncoupled can be produced... that is unless there are questions.

You can access this file at the URL:
https://groups.io/g/SergentEngineering/files/Uncoupler/3D%20Printed%20Parts%20Instructions.zip

Cheers,
The Groups.io Team

Re: Blackstone cars and Locos

Scott McDonald
 

Mike have you had a chance to run the Blackstone cars with the Sergent couplers?  What do you think of them so far?

Scott McDonald

Re: Blackstone cars and Locos

Mike Chamberlain
 

I like them ! Took a while to get assembly down , but as soon as I started using a toothpick to burnish the bearing hole I had much better results . They look great on the cars , and especially on the passenger cars the coulping distance is much better . They uncouple just fine with the magnet tool . Only problem is that aren't easy to couple . My layout has almost no straight track and you need to be right over them to set them up for coupling . Not a big deal for me as I am mostly a runner , but they may be frustrating to someone that does a lot of switching ......Mike


On Wed, Jun 12, 2019 at 8:43 AM Scott <repairman87@...> wrote:
Mike have you had a chance to run the Blackstone cars with the Sergent couplers?  What do you think of them so far?

Scott McDonald

Re: Uncoupler

Jacob Damron
 

Why DCC? It's a 30 year old nightmare protocol. I'd use something like RailPro that isn't limited by addressing issues. You're going backwards a long ways trying to go forward. 

Re: Uncoupler

Timothy Cann
 

You are right about everything you say about RailPro, and you could add more reasons over using DCC.  One thing you don't mention is the cost: about $40 additional per car or engine with uncoupler support.  Cost is going to be the main determiner for someone to consider using my design.  At $114 per car or engine (see my details in the Files section) for uncouplers at both ends will probably be rejected off-hand simply because of the cost, and there is nothing about my design that would prevent someone from using RailPro instead of DCC with everything else I've described unchanged.  Thank you for your e-mail.