Bangor & Aroostook 4-4-0 "American" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class H-2 (Locobase 6003)

Data out of BAR locomotive diagram book provided in April 2004 from Allen Stanley's extension collection.

American-type mixed-train locomotives with relatively tall drivers, small boiler, and underachieving tractive effort. 207-208 were similar, but slightly lighter. 209 was redesignated H-3 and, when the BAR guide was published, had a slightly larger boiler (1,050 sq ft) and grate (14.5 sq ft) and 63" drivers.

The builders' data comes from a table compiled by B. Rumary based on information from Jeremy Lambert and supplied by Allen Stanley in March 2004. Rumary-Lambert assign works #1596-1598 (September-October 1893), 1617 (November 1893), 1620-1623 (May-June 1894).

In 1907, the class was renumbered in two batches. 13-16 became 203-206 while 17-20 took 10-13 for some reason. 15 was scrapped relatively early in October 1914. 10, 11, and 13 all went in August 1929, 12 followed in December 1930 with 203 being scrapped a month later. All by itself, 204 hung on until February 1941.


Class K - 210 (Locobase 6001)

Data out of BAR locomotive diagram book provided in April 2004 from Allen Stanley's extension collection. Works numbers were 1592-1595 in 1893.

American-type mixed-train locomotives with relatively low drivers.

210-211received new, smaller boilers in 1919; the data in the specs come from that rebuild. 211 wound up on the Belfast & Moosehead Lake as their 16 after being sold December 1927.


Class K - 212 (Locobase 6002)

Data out of BAR locomotive diagram book provided in April 2004 from Allen Stanley's extension collection.

American-type mixed-train locomotives with relatively low drivers. This second pair of 4 originally delivered by Manchester in 1893 (works #1594-95). Unlike the two shown in Locobase 6001, these apparently didn't get new boilers. Like the 211, 213 went to Belfast & Moosehead Lake again as their #16 in September 1936.


Class K-1/K-2 (Locobase 5995)

Data out of BAR locomotive diagram book provided in April 2004 from Allen Stanley's extension collection.

This trio of Americans was rebuilt from a class of 4 Moguls that were originally delivered from Manchester in 1895-1896. Within practically the same wheelbase, the modifiers removed a driving axle and the front truck and substituted a front bogie truck. Also, the heating surface was increased by fitting 25 more tubes in the boiler.

It was a short-term solution as all 3 were retired in 1923-1924. K-2 engines 220-221 were virtually identical. They're shown on the diagrams as having been delivered in 1895 with works # (1545-46) just ahead of the Class A Moguls that provided the basis for the other three. Seems likely that these too were conversions.

NB: The direct heating surface (including the firebox heating surface) is an estimate calculated by subtracting the calculated tube heating surface from the reported total evaporative heating surface.

Specifications by Steve Llanso of Sweat House Media
ClassH-2K - 210K - 212K-1/K-2
Locobase ID6003 6001 6002 5995
RailroadBangor & AroostookBangor & AroostookBangor & AroostookBangor & Aroostook
CountryUSAUSAUSAUSA
Whyte4-4-04-4-04-4-04-4-0
Number in Class7425
Road Numbers13-19 / 203-209210-213212-213214-216, 220-221
GaugeStdStdStdStd
Number Built742
BuilderManchesterManchesterManchestershops
Year1893189318931915
Valve GearStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase8'9'9'9'
Engine Wheelbase24.29'23.67'23.67'24.42'
Ratio of driving wheelbase to overall engine wheebase 0.33 0.38 0.38 0.37
Overall Wheelbase (engine & tender)44.12'45.79'45.79'46.25'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers58800 lbs64600 lbs64000 lbs78100 lbs
Engine Weight93600 lbs104000 lbs100000 lbs118600 lbs
Tender Light Weight50000 lbs55000 lbs55000 lbs118600 lbs
Total Engine and Tender Weight143600 lbs159000 lbs155000 lbs237200 lbs
Tender Water Capacity3000 gals3000 gals3000 gals3700 gals
Tender Fuel Capacity (oil/coal)4 tons5 tons5 tons5 tons
Minimum weight of rail (calculated)49 lb/yard54 lb/yard53 lb/yard65 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter69"63"63"67"
Boiler Pressure150 psi160 psi150 psi160 psi
Cylinders (dia x stroke)16" x 24"18" x 24"18" x 24"18" x 24"
Tractive Effort11353 lbs16786 lbs15737 lbs15784 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.18 3.85 4.07 4.95
Heating Ability
Firebox Area139 sq. ft161 sq. ft193 sq. ft
Grate Area13 sq. ft18 sq. ft18.90 sq. ft18.25 sq. ft
Evaporative Heating Surface1129 sq. ft1143 sq. ft1513 sq. ft1915 sq. ft
Superheating Surface
Combined Heating Surface1129 sq. ft1143 sq. ft1513 sq. ft1915 sq. ft
Evaporative Heating Surface/Cylinder Volume202.15161.70214.05270.92
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1950288028352920
Same as above plus superheater percentage1950288028352920
Same as above but substitute firebox area for grate area2085002415030880
Power L15634051657280
Power MT422.480355.84411.00


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