Mexico 2-6-6T
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FC Central De Mexico - 2-6-6T

This is the original builders photo of Number 124.  Click image for a larger photo.
Panoramic view showing difficult nature of the line.

Source - "The Fairlie Locomotive" - Abbott p89

Click picture for a larger image.
Closeup of engine.
Name Number 124-125
Works No 752-753 Type 2-6-6T
Date 1889 Drivers 4'6"
Cylinders 16x24 Weight 73,920
Gauge 3'0"
Later RR National Railroad of Mexico

National Railroad of Mexico Nos. 124-5 

The largest of the Mason-Fairlie locomotives were these two built for the Mexican Railroad, and they were among the few of the type for use on standard-gauge track. With cylinders at 16inx24in(406mmx610mm) and with driving wheels of diameter 54in (1372mm), they would have given a tractive force of 13,500lb(6,124kg), assuming a steam pressure of 140psi(965kPa), their total weight amounted to 93,271lb (42.3 tons), of which about half would have been on the driving wheels. They were of the single boiler type, and were provided with the usual comfortable, fully enclosed cab.

The standard gauge Mexico Central railway, full of sharp curves and heavy grades was built on a roadbed with little earthwork and almost no ballast.  For that reason, they needed to use articulated locomotives.  Two Mason Bogey 2-6-6Ts were tried unsuccessfully on this line.

 
15 of these Mason Bogies were built in 1890 by Baldwin. Cylinders were 20x24 in., drivers were 4'1". 29.8 sq. ft. grate area! Boiler ran at 130 lbs. and they weighed 771/4 tons.

from O.S.Nock's "Railways in the Formative Years 1851 1895".
Name Number
Works No Type 2-6-6T
Date 1890 Drivers 4'1"
Cylinders 20x24 Weight 77,250
Gauge 3'0"
Later RR National Railroad of Mexico

 

(c) 2007 Iron Horse 1:29