Elvas Tower: PRR_M1Bs_6992-6999_Open-Rails-only - Elvas Tower

PRR-M1B's Readme

An Orginal Model by Allen Norton-B&O Guy"

Models constructed with TrainSim Modeler

Credits:

Model by Allen Norton

Contributors:

Mike DiMaio-requester of model and some drawings,
Mestavet-M1 drawing, Tim Muir-couplers and pin puller and
others have given help and inspiration.....

No support is offered or will be given. Use the forum for questions.
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Legals:

I or we are not responsible for any damage to your computer or
programs because of you loading this file on or in your Open Rails.
You bear the sole responsibility for any problems you may encounter
while using these models
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Model statistics;

The Pennsylvania Railroad's Juniata Shops in Altoona, PA, outshopped
a single "Mountain" 4-8-2 locomotive in 1923. It was assigned road
number 4700 (later is was renumbered 6699) and was designated Class M1.
It was a common practice for the PRR to build a prototype that could be
tested thoroughly before ordering more of a locomotive design. It tested
the Class M1 prototype for two years before approving it for fleet
construction.

The design of the PRR's "Mountain" locomotive was not an extension of
its Class K4s "Pacific", but rather a descendant of its I1s "Decapod".
It was the work of J. T. Wallis, Chief of Motive Power and W. F. Kiesel,
Jr, Mechanical Engineer, who started with an I1's boiler, enlarged the
combustion chamber, then used the "Decapod's" guides, crossheads and many
other parts.

In 1925, the PRR ordered 200 Class M1 "Mountains", 175 (road numbers 6800
through 6974) from the Baldwin Locomotive Works and 25 (road numbers 6975
through 6999) from the Lima Locomotive Company. These locomotives had 72"
drivers, 27 x 30 cylinders, a 250 psi boiler pressure, a tractive effort
of 64,550 lbs and weighed 385,000 pounds.

One hundred, Class M1a "Mountains" were added to the roster in 1930, fifty
(road numbers 6700 through 6749) from Baldwin, twenty (road numbers 6777
through 6799) from Lima and twenty (road numbers 6750 through 6774) built
in the Juniata Shops. Class M1a locomotives were very similar to the Class
M1s but, included two air compressors instead of one and had Worthington
feedwater heaters.

There is one PRR Mountain survivor, number 6755, at the Railroad Museum of
Pennsylvania in Strasburg, PA.

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Needs:

You will need the Pere Marquette 1225 or PM 1225 from Brandon Smith for
the Cab view and sounds. It's available from Trainsim.com.

This is an Open Rails only model.

If you need to contact me you may do so here at Elvas Tower.

Thank you
Allen Norton-"B&O Guy"