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RTN LNA

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

3 posts in this topic

traintech1.jpg

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

1258386877m_SPLASH.jpg

More pics and video here.

and

A two truck, two cylinder,

"Class A" Shay Locomotive

My BBB&C's locomotive number 7

1258436313m_SPLASH.jpg

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

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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

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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

shay_on_left_curve.jpg

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

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