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Specifications
Specifications
Configuration:;
• Whyte	2-8-2
• UIC	1′D1′ v, later 1′D1′ h
Gauge	3 ft (914 mm)
Leading dia.	28 in (711 mm)
Driver dia.	40 in (1,016 mm)
Trailing dia.	28 in (711 mm)
Wheelbase	24.5 ft (7.47 m)
Length	33.7 ft (10.27 m)
Adhesive weight	105,425 lb (47,820 kg; 48 t)
Loco weight	136,650 lb (61,983 kg; 62 t)
Fuel type	Coal
Superheater	yes, later
Cylinders	Original: Four Vauclain compound,; Later: Two, simple
Cylinder size	Original: 13 in × 22 in (330 mm × 559 mm); and 22 in × 22 in (559 mm × 559 mm); Later: 17 in × 22 in (432 mm × 559 mm)
Valve gear	Walschaerts
Valve type	Original: slide valves; Later: piston valves

Type and origin
Type and origin
	References:
Power type	Steam
Builder	Baldwin Locomotive Works
Serial number	21788
Build date	April 1903
Rebuild date	2009–May 2013

D&RGW 463
D&RGW 463
	463 on the Cumbres and Toltec in 2021
Power type
Type and origin
	References:
Power type	Steam
Builder	Baldwin Locomotive Works
Serial number	21788
Build date	April 1903
Rebuild date	2009–May 2013
Configuration:;
Specifications
Configuration:;
• Whyte	2-8-2
• UIC	1′D1′ v, later 1′D1′ h
Gauge	3 ft (914 mm)
Leading dia.	28 in (711 mm)
Driver dia.	40 in (1,016 mm)
Trailing dia.	28 in (711 mm)
Wheelbase	24.5 ft (7.47 m)
Length	33.7 ft (10.27 m)
Adhesive weight	105,425 lb (47,820 kg; 48 t)
Loco weight	136,650 lb (61,983 kg; 62 t)
Fuel type	Coal
Superheater	yes, later
Cylinders	Original: Four Vauclain compound,; Later: Two, simple
Cylinder size	Original: 13 in × 22 in (330 mm × 559 mm); and 22 in × 22 in (559 mm × 559 mm); Later: 17 in × 22 in (432 mm × 559 mm)
Valve gear	Walschaerts
Valve type	Original: slide valves; Later: piston valves
Tractive effort
Performance figures
Tractive effort	27,000 lbf (120 kN)
Operators
Career
Operators	Denver and Rio Grande Railroad (D&RG); → Denver and Rio Grande Western Railroad (D&RGW); → Cumbres and Toltec Scenic Railroad (C&TSRR);
Class	D&RG: 125; D&RGW: K-27;
Number in class	14 of 15
Numbers	D&RG 463; D&RGW 463; C&TSRR 463; RGS 455;
Nicknames	Mudhen
Retired	1950s (revenue service); 2002 (1st excursion service)
Restored	1994 (1st restoration); May 2013 (2nd restoration)
Disposition	Operational, in service on the Cumbres and Toltec Scenic Railroad
	Engine No. 463
	U.S. National Register of Historic Places
	Colorado State Register of Historic Properties
Location	C&TS shops, Chama, New Mexico
Coordinates	36°54′10.4″N 106°34′40.7″W / 36.902889°N 106.577972°W
Area	0 acres (0 ha)
Built	1903
Architect	Baldwin Locomotive Works
NRHP reference No.	75000502
CSRHP No.	5CN.68
Added to NRHP	May 12, 1975

Cumbres and Toltec Scenic Railroad (Denver and Rio Grande Western) No. 463 is a 3-foot narrow-gauge class "K-27" 2-8-2 "Mikado" type steam locomotive built for the Denver and Rio Grande Railroad (D&RG) by the Baldwin Locomotive Works in 1903. It is one of two remaining Rio Grande K-27 locomotives, the other one being No. 464 at the Huckleberry Railroad in Genesee Township, Michigan. The class eventually became known by the nickname "Mudhens". Today, No. 463 is operational on the Cumbres and Toltec Scenic Railroad between Chama, New Mexico and Antonito, Colorado.

Fifteen locomotives were built, originally class 125, then reclassified K-27 in 1924 when the D&RG became the Denver and Rio Grande Western Railroad (D&RGW). The K-27s were built as Vauclain compounds, with two cylinders on each side, expanding the steam once in the smaller cylinder and then a second time in the larger one. The extra maintenance costs of the two cylinders were greater than the fuel saving, so they were converted to simple expansion in 1907–1909.^[2] They were Rio Grande's last purchase of compound locomotives. They pulled freight, passenger and mixed trains on the D&RGW in and over the Colorado Rocky Mountains, traversing the entire length of the railroad. They were built with their main structural frames outside the driving wheels, with the counterweights and rods attached outside the frames.

No. 463 was sold to cowboy actor and singer Gene Autry in May 1955.^[5] Autry never used the engine and donated it to the town of Antonito, Colorado. It was restored by and entered into service on the Cumbres and Toltec Scenic Railroad in 1994. It was taken out of service with a broken side rod in late 2002. In 2009, it was moved to the railroad's shop at Chama, New Mexico where a major rebuild was taken until completion in Spring 2013.^[6] On May 20, 2013, the restored locomotive made its inaugural run on the C&TSRR.^[7]

No. 463 was added to the National Register of Historic Places in 1975 as Engine No. 463.

References

^ Official Roster No. 11 of the Denver and Rio Grande Western Railroad System. Denver: The Denver and Rio Grande Western Railroad System. April 1, 1923. p. 94.
^ ^a ^b Brewster, Allen J. "D&RG's K-27, parts 1 and 2". Model Railroader. March and June, 1973. Milwaukee: Kalmbach.
^ Steamlocomotive.info
^ "National Register Information System". National Register of Historic Places. National Park Service. March 13, 2009.
^ "Denver & Rio Grande Locomotive History: 463". Rio Grande Modeling and Historical Society. Retrieved January 28, 2010.
^ "A chronicle of the rebuilding of D&RGW locomotive #463". DRGW463.COM. Archived from the original on September 17, 2009. Retrieved February 6, 2010.
^ Miller, Janneli (July 1, 2013). "Going loco over locomotives". Four Corners Free Press. Retrieved March 15, 2016.