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A two truck, two cylinder, Shay Locomotive
My BBB&C's Class A Shay Locomotive number 7, with videos
About this creation

A two truck, two cylinder,

"Class A" Shay Locomotive


My BBB&C's locomotive number 7

(Buffalo Bayou, Brazos and Colorado Railway)

I should say that I built this MOC in response to an article called
"SELECTIVE COMPRESSION APPLIED TO MECHANICAL DETAILS" by Steve Barile in RAILBRICKS issue 3 on page 34-35 where it says:

"The Shay does not have traditional steam driver wheels but instead only front and rear two axle trucks. What is tricky about modeling the Shay is the rotating, bending, and changing length of the drive shaft, while maintaining a 90ยบ crown gear connection to each axle as well as a connection to the vertical piston rods. It barely makes mechanical sense while studying the real engine. Trying to achieve this in a six wide (even eight wide) train with a pure LEGO solution seems to be impossible (ha, a challenge!)."

I hope my 8-wide MOC answers this challenge!

This locomotive is blogged on RailBricks! Thanks Tony!

More information below these photos and videos
























Modeled on Shay serial number 122
I also choose it because it's a
"T-Boiler" or "Boot Boiler"
so I could hide my power functions motor in it.


I also looked at Bachmann's Class A Shay model:



Videos:
I should say that in this first video, you will see the Shay make left and right turns as well as past through switches.


At the Memorial Hermann Tower Grand Opening TexLUG show




For more info on:
The BBB&C the First Railroad in Texas

The Shay Locomotive

The Shay locomotive serial number 122



The Home of Republic of Texas Navy in LEGOs is right here on MOCpages.

enjoy

kurt

Notes:
  • RTS - Republic of Texas Ship
  • RTN - Republic of Texas Navy
  • LNA - Lego Naval Architect









Comments

  March 29, 2014
I always liked Shay c/n 112 which is still around at a logging railroad in California. I build models, and I have done a Shay in HO, I just can't grasp the amount of design and planning that went in building that model with Legos. I am amazed at what can be done. I learned alot about them since my daughter married Tony Newman. My hat is off to you. GREAT JOB!!!!!
 I like it 
  February 21, 2014
Wow, that's amazing! When will you make instructions for this? I'll buy it :) :)
 I like it 
  October 11, 2013
hum no instructions yet .... lol
 I like it 
  August 1, 2013
Very difficult build but you nailed jt. Looks very realistic. Very impressive
 I like it 
  January 17, 2012
This is great! As my brother in law Tony posted earlier, my family and I are huge rail buffs. In fact I named my son Shay after these very locomotives. And now that my son, my brother in law and my self are all into Legos, I would absolutely love to build this. If you ever document this build, please let us know. Thank you for sharing your creation.
 I made it 
  December 27, 2011
Quoting Tony Newman Count my vote!! My father-in-law is a MAJOR PRR logging railroad fan who is obsessed with Shay as well as my brother in law. As I am a big AFOL, we had talked about building a layout including a logging theme. We found the plans for a much simpler model, but it doesn't have the level of realism yours has. Please consider doing the build instructions. it would make a great project for us all to work on.
I am glad you like it! Up to 3 votes now!
 I like it 
  December 27, 2011
Count my vote!! My father-in-law is a MAJOR PRR logging railroad fan who is obsessed with Shay as well as my brother in law. As I am a big AFOL, we had talked about building a layout including a logging theme. We found the plans for a much simpler model, but it doesn't have the level of realism yours has. Please consider doing the build instructions. it would make a great project for us all to work on.
 I made it 
  July 15, 2011
Quoting Roy Bell Exelent job, people just dont get how hard it is to make a shay out of lego. also you said "If you can get enough people to comment here that they want instructions, I'll get motivated enough to do them." Well i just wanted to put my 2 cents in and ask you to do them as well, it would be awsome to see more lego shays and your posting instuctions would shurly help, i know i would build one lol.
I am glad you like it, and that's now 2 votes for instructions, a full 100% increase!
Quoting Roy Bell Also if its not too much troubble, would you mind posting a vidio of the shay with no load at top speed? im just currious as to how the gear reduction affected the preformance. Shurly it increased the tourq but at what cost of speed? And thank you for sharing your lovely shay locomotive with all of us.
It really goes no faster than those videos. thanks kurt
 I like it 
  July 5, 2011
Exelent job, people just dont get how hard it is to make a shay out of lego. also you said "If you can get enough people to comment here that they want instructions, I'll get motivated enough to do them." Well i just wanted to put my 2 cents in and ask you to do them as well, it would be awsome to see more lego shays and your posting instuctions would shurly help, i know i would build one lol. Also if its not too much troubble, would you mind posting a vidio of the shay with no load at top speed? im just currious as to how the gear reduction affected the preformance. Shurly it increased the tourq but at what cost of speed? And thank you for sharing your lovely shay locomotive with all of us.
 I made it 
  June 1, 2011
Quoting kendall o WOW! nice shay, ive searched the pics like crazy, but i could not find out how the drive shaft actually moves.
Look here: http://www.mocpages.com/image_zoom.php?mocid=166301&id=/user_images/18066/12584363207 under the http://www.bricklink.com/catalogItem.asp?P=50947 there is a 8 tooth gear! You are the first to ask that question!
Quoting kendall o I am currently in the middle of a 3 truck west side lumber co. Shay #9 that is in georgetown,CO. If you could write back or post pictures of how the drive shaft works, that would be great. I love shays, and i would be very happy if you would respond. Sometime over the summer, i will put my shays moc, too. I would never get my shay done if i didnt see how you used the u joints on the drive shaft. Please respond as soon as you can.
Have fun MOCing your shay! kurt
 I like it 
  June 1, 2011
WOW! nice shay, ive searched the pics like crazy, but i could not find out how the drive shaft actually moves.I am currently in the middle of a 3 truck west side lumber co. Shay #9 that is in georgetown,CO. If you could write back or post pictures of how the drive shaft works, that would be great. I love shays, and i would be very happy if you would respond. Sometime over the summer, i will put my shays moc, too. I would never get my shay done if i didnt see how you used the u joints on the drive shaft. Please respond as soon as you can.
 I like it 
  January 24, 2011
Wow! That just looks like the real thing to me! ;-D
 I made it 
  August 22, 2010
Quoting Michael Kager Wow! Just amazing! I do not know what to say! Over 4 years I worked for a shay like this! I also wantet to include technic parts and motor in my shay! But it never worked fine! I had so much problems in the curves....
I am glad you think it's amazing!
Quoting Michael Kager You really used a normal 9V Battery-box on the inside?
No, I did not. In my Shay the Power Functions M-Motor is in the "T" or "Boot" of the boiler. And the Power Functions IR Receiver is in the cab. I needed to fit a 9V power source into the little rear tender at the back of the Shay. There wasn't room see: http://www.mocpages.com/moc.php/168223
Quoting Michael Kager You really combined a nex XL-Motor with a 9V battery-box? The new battery-boxes I know have 10V or isn`t it?
There is only one PF Medium Motor!
Quoting Michael Kager No matter what! Just perfect! I hope you win some international prices for your fantastic work!
I had it at BrickWorld and it didn't even get a train MOC nomination! (I did have two other MOCs of mine nominated though ;^) ) I think the problem is that most people don't know what a Shay is! Let alone the challenge of building one out of LEGO!
Quoting Michael Kager You would be a rich man, if you sell a instruction for this wonderful shay!
If you can get enough people to comment here that they want instructions, I'll get motivated enough to do them.
Quoting Michael Kager Do you know, how much parts you used to build up this set? In my mind I think about 800 pieces?? Many thanks!
As I recall it's about 910.
 I like it 
  August 17, 2010
Wow! Just amazing! I do not know what to say! Over 4 years I worked for a shay like this! I also wantet to include technic parts and motor in my shay! But it never worked fine! I had so much problems in the curves.... I ordered about 1000 parts on bricklink, again and again but nothing helped me! I also thought about glueing some parts.... After so unbelievable hard work I bought my 10194 emerald night with all functions! And I was happy! I try to build up my shay again! Now I have some new ideas seen on your shay! Maybe I have luck and this time my shay will also work fine in the curves! You really used a normal 9V Battery-box on the inside? I remember on the old 9V battery-boxes, f.e. for train on 6399..... You really combined a nex XL-Motor with a 9V battery-box? The new battery-boxes I know have 10V or isn`t it? No matter what! Just perfect! I hope you win some international prices for your fantastic work! For me, YOU ARE REALLY THE BEST! It would be the best for me, to have a shay like this in my private collection! You would be a rich man, if you sell a instruction for this wonderful shay! Do you know, how much parts you used to build up this set? In my mind I think about 800 pieces?? Many thanks! It is just wonderful to see so a wonderful sets build up in lego! Have a nice day! Michi
RTN LNA
 I like it 
Eric C
  July 1, 2010
What a gorgeous Shay! I like the working pistons, and how you connected your Power Functions to a 9v battery. Brilliant!
 I made it 
  November 24, 2009
Quoting Nathaniel Brill It's great to see a Shay with some realistic movement. Awesome design!
Thanks Nathaniel
 I made it 
  November 24, 2009
Quoting Jason Steinhurst Awesome. I've been trying to build a Shay for a few months now, but I was trying to do it by designing a functioning spline joint, and I never could get a spline joint to work right at that scale--- And now you have shown us that a functioning Shay can be built, and it doesn't even need a spline joint! Well done.
I too spent months building and rebuilding various sliding driveline shafts. I even considered cutting and gluing LEGO parts together!! But, then I had that "Ah-ha moment" that if the shay was short (as possible) and the trucks are small and tight, then trucks do not move through that big an angle! So by using LEGO 55423 wheels which are just bigger than the crown gears 6589, I made a tight small truck with no other gears or axles! Thanks
 I made it 
  November 24, 2009
Quoting Caleb Randolph This is amazing. You did an wonderfull job making this Shay locomotive and with power functions as well. I enjoy seeing it in motion too. 5*
I am glad you find it amazing! Thanks for the praise!
 I made it 
  November 24, 2009
Quoting Noel (none of your business) Oh my goodness... that is just amazing! Have you taken it up an incline yet and/or pulled a lot of rolling stock? I bet that thing has enough torque!
I glad you find it amazing! No, I have not yet made climb an incline. It is geared down (maybe to much, it's why it's so slow) but it only has a single PF M motor it's not going to complete with Loco(s) running one or more PF XL motor(s).
 I like it 
  November 24, 2009
It's great to see a Shay with some realistic movement. Awesome design!
 I like it 
  November 22, 2009
Awesome. I've been trying to build a Shay for a few months now, but I was trying to do it by designing a functioning spline joint, and I never could get a spline joint to work right at that scale--- And now you have shown us that a functioning Shay can be built, and it doesn't even need a spline joint! Well done.
 I like it 
  November 21, 2009
This is amazing. You did an wonderfull job making this Shay locomotive and with power functions as well. I enjoy seeing it in motion too. 5*
 I like it 
  November 20, 2009
Oh my goodness... that is just amazing! Have you taken it up an incline yet and/or pulled a lot of rolling stock? I bet that thing has enough torque!
 I like it 
  November 20, 2009
Another excellent creation here! You have some serious train building skills.
 I made it 
  November 20, 2009
Quoting Matt Chiles Fantastic job. You built the Shay I always wanted to build. It looks just like the prototype I would like to use, which is parked at the Forrestry Center across from the zoo in Portland, Oregon.
Glad you like it! Actually the Shay you are talking about is SN 2172 which is a "Class B" Shay (2-trucks 3-cylinders) http://www.shaylocomotives.com/data/lima2399/sn-2172.htm Larger and newer but a wonderful Shay as well!
 I like it 
  November 20, 2009
Fantastic job. You built the Shay I always wanted to build. It looks just like the prototype I would like to use, which is parked at the Forrestry Center across from the zoo in Portland, Oregon.
RTN LNA
 I like it 
Thomas N
  November 19, 2009
This is excellent, the details of the piping and driving rods are especially good. Its great how the driving system is fully functional, with moving rods and everything. ~T
 I made it 
  November 19, 2009
Quoting Thomas N This is excellent, the details of the piping and driving rods are especially good. Its great how the driving system is fully functional, with moving rods and everything. ~T
Thomas, I am glad you like it! And "the driving system" is fully functional because the drive-line is the drive-line! The wheels turn because of that drive shaft, through the crown gears. There is an 8-tooth gear in the middle between the faux-pistons (hidden under the faux-valve rods) which turns the drive shaft! enjoy!
 I made it 
  November 18, 2009
Quoting Allan Hall great moc. i'm pleased you had a photo of a real engine, you have done an amazing job with the details, I liked the bell best nice touch. I try to stick to 6 wide with my engines which sometimes limits the detail.
Allen I am glad you like it! I almost always try to model real objects, I consider it more of a challenge. The 8-wide was driven by the "scale" of the LEGO Technic "solution".
 I made it 
  November 18, 2009
Quoting Morten Frandsen Great! Just great...
Morten I am glad you like it!
 I made it 
  November 18, 2009
Quoting Martin Steenbeeke Wow..Is all I have to say! Honestly breathtaking.
I am glad you like it!
 I like it 
  November 17, 2009
Great! Just great...
 I like it 
  November 17, 2009
great moc. i'm pleased you had a photo of a real engine, you have done an amazing job with the details, I liked the bell best nice touch. I try to stick to 6 wide with my engines which sometimes limits the detail.
 I like it 
  November 17, 2009
Wow..Is all I have to say! Honestly breathtaking.
 
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LEGO models my own creation MOCpages toys shop A two truck, two cylinder, Shay LocomotiveEngines


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