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MOC: BBB&C "new" 4-2-0 and Class A Shay locomotives


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#1 RTN LNA

RTN LNA

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Posted 17 November 2009 - 07:29 AM

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The First Locomotive
of the First Railroad in Texas


The 4-2-0 named the "General Sherman"
(for Texas General Sidney Sherman)
was the first locomotive of the
Buffalo Bayou, Brazos and Colorado Railway

Posted Image

More pics and video here.

and

A two truck, two cylinder,
"Class A" Shay Locomotive


My BBB&C's locomotive number 7

Posted Image

More pics and videos here.

I should say that I built this MOC in response 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 90° 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!


enjoy

kurt

Edited by TheBrickster, 19 November 2009 - 02:47 PM.

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#2 Mark Bellis

Mark Bellis

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Posted 17 November 2009 - 08:23 PM

Those engines really look the business!
Appropriate photographic technique too.

Will the Shay go round corners?  I found it quite a challenge to make the extendable shafts.

Mark
Mark J E Bellis - 8mm Scale LEGO Railways, Scenery and Technic. Visit My Brickshelf
Posted ImagePosted Image  Posted Image

#3 RTN LNA

RTN LNA

  • Pneumatic Pirate


    Posts: 152
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    Country: USA

Posted 17 November 2009 - 08:50 PM

View PostMark Bellis, on Nov 17 2009, 09:23 PM, said:

Those engines really look the business!
Appropriate photographic technique too.

Will the Shay go round corners?  I found it quite a challenge to make the extendable shafts.

Mark
Thanks Mark, I am glad you like them.

Your question will be answered, if you watch the Shay Videos!

------ later edit -----

Mark you built this Shay mechanism
Posted Image

I had looked at it in my research in building my Shay!

I didn't connect your name to it until now!

I was working on the Shay building challenge on pages 34-35 of Railbricks issue 3

Have you watched the videos yet?

------ later edit -----


enjoy

kurt

Edited by RTN LNA, 18 November 2009 - 06:43 PM.

The RTN now has a home page!!

       ... why pirates? (recall what Sam Houston said about the RTN)



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