Bangor & Aroostook 4-6-0 "Ten-Wheeler" Type Locomotives

Class C-1 (Locobase 5997)

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

These passenger locomotives befitted the BAR's relatively modest service. Note that the relatively undemanding boiler pressure led to a high Factor of Adhesion; they probably didn't slip much.

Some lasted to the end of steam. These were superheated; the results are found in Locobase

Class C-1 (Locobase 6614)

Data out of 1938 BAR locomotive diagram book provided in April 2005 from Allen Stanley's extension collection.

Although the BAR waited until relatively late in the game to superheat two of the four C-1 Ten-wheelers, they went further than many other railroads when they did so. New boilers of a modified design were accompanied by new fireboxes; heating surface area was down, but the superheater more than made up for the reduction as did the higher boiler pressure rating.

Class D-1 (Locobase 5998)

Data out of BAR 7 locomotive diagram book provided in May 2005 by Allen Stanley from his extension collection.

This numerous class of Ten Wheelers set the tone on the BAR for passenger locomotives. Manchester delivered the first 10 (works #M1783-92, numbered 60-64 and 50-54). In the next year, Manchester was absorbed by Alco and the next group -- 55-59 -- had Alco numbers (#26022-26). A 3-year pause and the last 13 were delivered in several batches. 31137-40, 37518-9, 41434, 38813-17, and 41433 (in engine number order).

Comprising the majority of 4-6-0s on the BAR, this class was retired over a couple of decades. The first left in 1927, the last at the very end of steam in 1952.

Class D-2 (Locobase 5999)

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

Not clear why this class has a different class ID than the one described in Locobase 5998. About the only difference evident in the diagram book was the tender. In any case, the quintet had a similar career.

Class D-3 - superheated (Locobase 6000)

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

The last 4-6-0s to be built for the BAR, this quintet had 7 fewer tubes than the D-1s and D-2s and higher boiler pressure. A commensurate increase in weight kept the factor of adhesion about the same.This data reflects the 1917-1918 superheating.

Class Ea - superheated (Locobase 9248)

Data out of BAR 7 - 1951 locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive collection.

This class was originally supplied by Alco's Rhode Island works in 1906. In the superheating phase, the BAR dropped the boiler pressure once it reconfigured the boiler to accept a Schmidt smoketube superheater.

Class F (Locobase 6005)

Data out of BAR locomotive diagram book provided in April 2004 from Allen Stanley's extension collection. 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 #1629-1630 (February-March 1895) and 1635-1636 (May 1895).

Among the oldest unmodified locomotives when the Diagram Book was published in the mid-1920s, these TenWheelers were recorded as having been scrapped. (233 in July 1923, 232 in July 1924, 231 in August 1925 -- 230 lasted until July 1933.)

Class F-1 (Locobase 6004)

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

This duo seem not have been superheated as were the other TenWheelers still in service when this Diagram Book was prepared.

Specifications
Class	C-1	C-1	D-1	D-2	D-3 - superheated	Ea - superheated	F	F-1
Locobase ID	5997	6614	5998	5999	6000	9248	6005	6004
Railroad	Bangor & Aroostook	Bangor & Aroostook	Bangor & Aroostook	Bangor & Aroostook	Bangor & Aroostook	Bangor & Aroostook	Bangor & Aroostook	Bangor & Aroostook
Whyte	4-6-0	4-6-0	4-6-0	4-6-0	4-6-0	4-6-0	4-6-0	4-6-0
Road Numbers	240-243	242-243	50-77	82-87	90-95	140-142	23-26 / 230-233	234-235
Gauge	Std	Std	Std	Std	Std	Std	Std	Std
Builder	Manchester	Shops	Manchester	Manchester	Manchester	B&A	Manchester	Manchester
Year	1902	1935	1901	1907	1911	1917	1895	1907
Valve Gear	Stephenson	Baker	Stephenson	Stephenson	Stephenson	Baker	Stephenson	Stephenson
	Locomotive Length and Weight
Driver Wheelbase	18.42'	18.42'	18.42'	18.42'	18.42'	14.83'	15'	13.83'
Engine Wheelbase	24.42'	24.42'	24.42'	24.42'	24.42'	25.83'	25.58'	23.83'
Ratio of driving wheelbase to overall engine wheebase	0.75	0.75	0.75	0.75	0.75	0.57	0.59	0.58
Overall Wheelbase (engine & tender)	49.58'	49.58'	49.58'	49.58'	52.10'	58.79'	47.75'	49.58'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers	113000 lbs	125700 lbs	111875 lbs	112000 lbs	122760 lbs	138700 lbs	90000 lbs	92000 lbs
Engine Weight	146000 lbs	162600 lbs	144500 lbs	144500 lbs	164600 lbs	184300 lbs	120000 lbs	120000 lbs
Tender Light Weight	90000 lbs	11000 lbs	90000 lbs	106000 lbs	101370 lbs	145000 lbs	76900 lbs	106000 lbs
Total Engine and Tender Weight	236000 lbs	173600 lbs	234500 lbs	250500 lbs	265970 lbs	329300 lbs	196900 lbs	226000 lbs
Tender Water Capacity	4000 gals	4000 gals	4000 gals	5000 gals	5000 gals	7500 gals	3900 gals	5000 gals
Tender Fuel Capacity (oil/coal)	7 tons	7 tons	7 tons	9 tons	8 tons	12 tons	5 tons	9 tons
Minimum weight per yard of rail on which locomotive could run	62.78 lb rail	69.83 lb rail	62.15 lb rail	62.22 lb rail	68.20 lb rail	77.06 lb rail	50 lb rail	51.11 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	69"	69"	63"	63"	63"	63"	67"	69"
Boiler Pressure	190 psi	200 psi	180 psi	180 psi	200 psi	175 psi	155 psi	190 psi
Cylinders (dia x stroke)	19" x 26"	19.5" x 26"	20" x 26"	20" x 26"	20" x 26"	22.5" x 26"	18" x 24"	18" x 24"
Tractive Effort	21969 lbs	24358 lbs	25257 lbs	25257 lbs	28063 lbs	31078 lbs	15291 lbs	18200 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	5.14	5.16	4.43	4.43	4.37	4.46	5.89	5.05
	Heating Ability
Firebox Area	216 sq. ft	180 sq. ft	166 sq. ft	166 sq. ft	166 sq. ft	178 sq. ft		150 sq. ft
Grate Area	27.40 sq. ft	27.90 sq. ft	27.25 sq. ft	27.25 sq. ft	27.25 sq. ft	44.54 sq. ft	18.90 sq. ft	27.25 sq. ft
Evaporative Heating Surface	2136	2016	2136	2136	1783	2322	1790	1695
Superheating Surface		369			388	465
Combined Heating Surface	2136	2385	2136	2136	2171	2787	1790	1695
Evaporative Heating Surface/Cylinder Volume	250.35	224.32	225.94	225.94	188.60	194.07	253.23	239.79
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	5206	5580	4905	4905	5450	7794.50	2929.50	5177.50
Same as above plus superheater percentage	5206	6443.32	4905	4905	6424.02	9094.98	2929.50	5177.50
Same as above but substitute firebox area for grate area	41040	41569.81	29880	29880	39133.49	36347.26	0	28500
Power L1	8235.89	15961.91	5929.57	5929.57	13561.12	11359.74	0	7557.84
Power MT	482.04	839.86	350.55	350.16	730.62	541.69	0	543.33