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Mexican Steam Locomotives[Inhalt]
Central Mexicano class E
Mexico | 1890 | 15 produced
Locomotive Engineering, March 1890

The Central Mexicano also received a total of 15 locomotives of the US type of the Mason-Fairlie in 1890, which essentially corresponded to the British Single Fairlie. Under the boiler barrel was a bogie that held the cylinders, three driving axles and a leading axle. At the rear, the tender rested on a three-axle bogie. The firebox hang between the bogies and could therefore be built deep enough.

In contemporary depictions, the locomotives were described as a successful design with a comfortable cab. Although they could negotiate the tightest curves with ease, the running smoothness was apparently not particularly good. Nevertheless, all locomotives were already scrapped between 1899 and 1908. This is probably due to the fact that more modern locomotives without moving steam lines were now available.

General
Built1890
ManufacturerBaldwin
Axle config2-6-6T (Single Fairlie) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase40 ft 11 1/2 in
Fixed wheelbase9 ft 4 in
Service weight173,200 lbs
Adhesive weight93,200 lbs
Axle load31,067 lbs
Water capacity3,500 us gal
Fuel capacitycoal
Power
Power sourcesteam
Estimated power575 hp (429 kW)
Optimal speed17 mph
Starting effort21,649 lbf
Power Plant
Driver diameter49 in
Boiler pressure130 psi
Expansion typesimple
Cylinderstwo, 20 x 24 in
Boiler
Grate area29.8 sq ft
Firebox area151.2 sq ft
Tube heating area1,645.8 sq ft
Evaporative heating area1,797 sq ft
Total heating area1,797 sq ft
Calculated Values
steam locomotive
Mason Bogie
freight
passenger
last changed: 03/2023
Mexican State Railway classes G-030 and G-033
Mexico | 1921 | 48 produced

The Nacionales de México class G-030 consisted of 20 three-foot gauge Consolidations delivered by Baldwin in 1921. The outside frames were designed in such a way that a later conversion to standard gauge would have been possible. They were fired with oil and were designed for lines with gradients of up to 4.5 percent and curve radii of up to 21 degrees (85 meters).

In reality, however, there were only a few modifications that were carried out by the NdeM shortly after delivery. These affected, for example, the blastpipe, the position of the air pump and the fire door. Eight more followed in 1924, which had a larger firebox and were designated class G-033. They became the standard freight locomotive in rural areas and survived until the late 1960s.

VariantG-030G-033
General
Built19211924
ManufacturerBaldwin
Axle config2-8-0 (Consolidation) 
Gauge3 ft (Three feet)
Dimensions and Weights
Wheelbase18 ft 11 in
Fixed wheelbase11 ft 6 in
Total wheelbase47 ft 0 1/2 in47 ft 3 in
Service weight113,200 lbs110,265 lbs
Adhesive weight103,000 lbs99,265 lbs
Total weight192,500 lbs182,265 lbs
Axle load25,750 lbs24,816 lbs
Water capacity3,600 us gal
Fuel capacity1,510 us gal (oil)2,102 us gal (oil)
Power
Power sourcesteam
Estimated power700 hp (522 kW)725 hp (541 kW)
Optimal speed17 mph
Starting effort26,600 lbf
Power Plant
Driver diameter41 in
Boiler pressure180 psi
Expansion typesimple
Cylinderstwo, 18 x 22 in
Boiler
Grate area18.7 sq ft19.4 sq ft
Firebox area79 sq ft87.3 sq ft
Tube heating area1,582 sq ft1,590.7 sq ft
Evaporative heating area1,661 sq ft1,678 sq ft
Total heating area1,661 sq ft1,678 sq ft
Calculated Values
steam locomotive
freight
last changed: 02/2024
Mexican State Railway class NR-1
Mexico | 1937 | 10 produced
No. 2708 in January 1960 in Puebla
No. 2708 in January 1960 in Puebla
Stan Kistler / collection Taylor Rush

The Nacional de Mexico received ten Hudsons from ALCO in Schenectady in 1937. With an adhesive weight of 170.000 pounds, they were among the lightest North American locomotives with this wheel arrangement. Thanks to their oil firing, they were able to stay in service well into the 1960s. Number 2708 survives today, retired in 1963 and on display in the Plaza de las Tres Centurias in Aguascalientes.

General
Built1937
ManufacturerALCO
Axle config4-6-4 (Hudson) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase37 ft 9 in
Fixed wheelbase13 ft
Total wheelbase69 ft 1 in
Service weight292,000 lbs
Adhesive weight170,000 lbs
Total weight465,660 lbs
Axle load56,670 lbs
Water capacity8,500 us gal
Fuel capacity4,037 us gal (oil)
Power
Power sourcesteam
Estimated power3,300 hp (2,461 kW)
Optimal speed51 mph
Starting effort41,263 lbf
Power Plant
Driver diameter73 in
Boiler pressure250 psi
Expansion typesimple
Cylinderstwo, 22 1/2 x 28 in
Boiler
Grate area66.8 sq ft
Firebox area281 sq ft
Tube heating area2,666 sq ft
Evaporative heating area2,947 sq ft
Superheater area850 sq ft
Total heating area3,797 sq ft
Calculated Values
steam locomotive
express
last changed: 03/2023
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