Baltimore and Ohio class S

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 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.^[1] They were nicknamed "big sixes" because until renumbering in 1954 their road numbers all began with 6.^[1] 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-1a continued service until 1953-1959.

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

References

^ ^a ^b Stover, John F. (1987). History of the Baltimore and Ohio Railroad. West Lafayette, IN: Purdue University Press. p. 256. ISBN 1-55753-066-1 – via Google Books.

[Stover-1] Stover, John F. (1987). History of the Baltimore and Ohio Railroad. West Lafayette, IN: Purdue University Press. p. 256. ISBN 1-55753-066-1 – via Google Books.

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