Baltimore and Ohio class S information

Specifications
Specifications
Configuration:;
• Whyte	2-10-2
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.	58 in:1473 mm(S class) 64 in:1626 mm(S-1 class)
Wheelbase:
• Engine	436.510 Ib(198.0 t : S-1 class) (184.16 : S Class)
• Drivers	347.230 Ib(157.5 t S-1 class) (152.77 t : S class)
Boiler:;
• Diameter	90 in to 100 in (2286 mm to 2540 mm : S-1 class)
Boiler pressure	220 Ib:15.5 kg/cm2(S-1 class) 200 Ib:14.1 kg/cm2(S Class )
Heating surface:
• Firebox	262 sq.ft(S-1 class)
• Tubes	4881 sp.ft(140.5 m2 : S-1 class)
• Total surface	5270 sq.ft(489.6 m2 : S-1 class) (517.8 m2 : S class)
Superheater:;
• Heating area	1512 sq.in(140.5 m2 : S-1 class) (123.5 m2 : S class)
Cylinder size	30 in x 32 in (762 mm x 813 mm : S-1 class) 30 in x 32 in (762 mm x 813 mm : S class)

Type and origin
Type and origin
Power type	Steam
Builder	Baldwin Locomotive Works; Lima Locomotive Works
Build date	1914,1923–1926
Total produced	31 (Class S) 75 (Class S-1) 50 (Class S-1a)
Rebuilder	B&O
Rebuild date	1925
Number rebuilt	2 (6009 and 6030)

S class S-1 and S-1a Class
S class S-1 and S-1a Class
	B&O S-1a class #6206 in 1928
Power type
Type and origin
Power type	Steam
Builder	Baldwin Locomotive Works; Lima Locomotive Works
Build date	1914,1923–1926
Total produced	31 (Class S) 75 (Class S-1) 50 (Class S-1a)
Rebuilder	B&O
Rebuild date	1925
Number rebuilt	2 (6009 and 6030)
Configuration:;
Specifications
Configuration:;
• Whyte	2-10-2
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.	58 in:1473 mm(S class) 64 in:1626 mm(S-1 class)
Wheelbase:
• Engine	436.510 Ib(198.0 t : S-1 class) (184.16 : S Class)
• Drivers	347.230 Ib(157.5 t S-1 class) (152.77 t : S class)
Boiler:;
• Diameter	90 in to 100 in (2286 mm to 2540 mm : S-1 class)
Boiler pressure	220 Ib:15.5 kg/cm2(S-1 class) 200 Ib:14.1 kg/cm2(S Class )
Heating surface:
• Firebox	262 sq.ft(S-1 class)
• Tubes	4881 sp.ft(140.5 m2 : S-1 class)
• Total surface	5270 sq.ft(489.6 m2 : S-1 class) (517.8 m2 : S class)
Superheater:;
• Heating area	1512 sq.in(140.5 m2 : S-1 class) (123.5 m2 : S class)
Cylinder size	30 in x 32 in (762 mm x 813 mm : S-1 class) 30 in x 32 in (762 mm x 813 mm : S class)
Maximum speed
Performance figures
Maximum speed	55-75 Mph
Operators
Career
Operators	Baltimore and Ohio Railroad
Class	S,S-1 and S-1a
Number in class	31 (S class) 125 (S-1)
Numbers	6000–6030 (S class) 6100-6224 (S-1 Class)
Nicknames	"big sixes"
Locale	Eastern United States
Retired	1926 (2) 1938 (15) 1953-1959 (Remainder)
Preserved	0
Scrapped	1926,1938,1953-1959
Disposition	All Scrapped by 1959.

Baltimore and Ohio Class S comprised three classes of 2-10-2 locomotives.

The S class proper were 31 locomotives built in 1914 by Baldwin Locomotive Works and numbered 6000–6030. The S-1 class comprised 50 locomotives numbered 6100–6149, and 25 locomotives numbered 6150-6174. They were built between 1923 and 1924, 75 by Baldwin and by Lima Locomotive Works . The Class S-1a’s were built in 1926. The first batch of 25 were built by Lima, and numbered 6175-6199. The second batch was built by Baldwin, and numbered 6200-6224. They were nicknamed "big sixes" because until renumbering in 1954 their road numbers all began with 6. Locomotives numbered 6009 and 6030 were scrapped in 1925, and their boilers used to build new Class T 4-8-2 Mountain Type locomotives numbered 5500 & 5501. 15 of the Class were retired and scrapped in 1938. The remainder of S-1's/S-1a's continued service until 1953-1959.

None of the B&O Class S 2-10-2’s were preserved.

Baltimore and Ohio class S information

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