Grand Canyon Railway 4960 information

Specifications
Specifications
Configuration:;
• Whyte	2-8-2
• UIC	1'D1
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Leading dia.	33 in (0.838 m)
Driver dia.	64 in (1.626 m)
Trailing dia.	42+1⁄2 in (1.080 m)
Tender wheels	33 in (0.838 m)
Wheelbase	70 ft 0 in (21.34 m)
• Engine	33 ft 9+1⁄2 in (10.30 m)
• Drivers	15 ft 21 in (5.11 m)
Height	15 ft 10+1⁄2 in (4.84 m)
Adhesive weight	233,850 lb (106,070 kg)
Loco weight	310,780 lb (140,970 kg)
Tender weight	195,300 lb (88,600 kg)
Total weight	506,080 lb (229,550 kg)
Fuel type	Recycled vegetable oil, originally coal
Fuel capacity	Old tender: 42,000 lb (19,000 kg); New tender: 3,800 US gal (14,000 L; 3,200 imp gal)
Water cap.	Old tender: 10,000 US gal (38,000 L; 8,300 imp gal); New tender: 18,000 US gal (68,000 L; 15,000 imp gal)
Firebox:
• Grate area	59 sq ft (5.5 m2)
Boiler:;
• Small tubes	2+1⁄4 in (57 mm)
• Large tubes	5+1⁄2 in (140 mm)
Boiler pressure	200 psi (1,400 kPa)
Feedwater heater	Worthington
Heating surface:
• Firebox	254.00 sq ft (23.597 m2)
• Tubes	2,179.00 sq ft (202.436 m2)
• Arch tubes	33.00 sq ft (3.066 m2)
• Flues	905.00 sq ft (84.077 m2)
• Tubes and flues	3,409.00 sq ft (316.706 m2)
• Total surface	4,178.00 sq ft (388.149 m2)
Superheater:;
• Heating area	769.00 sq ft (71.442 m2)
Cylinders	Two
Cylinder size	27 in × 30 in (690 mm × 760 mm)
Valve gear	Walschaerts

Type and origin
Type and origin
	Reference:
Power type	Steam
Builder	Baldwin Locomotive Works
Serial number	56809
Build date	August 1923

Grand Canyon Railway 4960
Grand Canyon Railway 4960
	GCRY No. 4960 idling at the Grand Canyon Village during its centenary celebration, on August 12, 2023
Power type
Type and origin
	Reference:
Power type	Steam
Builder	Baldwin Locomotive Works
Serial number	56809
Build date	August 1923
Configuration:;
Specifications
Configuration:;
• Whyte	2-8-2
• UIC	1'D1
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Leading dia.	33 in (0.838 m)
Driver dia.	64 in (1.626 m)
Trailing dia.	42+1⁄2 in (1.080 m)
Tender wheels	33 in (0.838 m)
Wheelbase	70 ft 0 in (21.34 m)
• Engine	33 ft 9+1⁄2 in (10.30 m)
• Drivers	15 ft 21 in (5.11 m)
Height	15 ft 10+1⁄2 in (4.84 m)
Adhesive weight	233,850 lb (106,070 kg)
Loco weight	310,780 lb (140,970 kg)
Tender weight	195,300 lb (88,600 kg)
Total weight	506,080 lb (229,550 kg)
Fuel type	Recycled vegetable oil, originally coal
Fuel capacity	Old tender: 42,000 lb (19,000 kg); New tender: 3,800 US gal (14,000 L; 3,200 imp gal)
Water cap.	Old tender: 10,000 US gal (38,000 L; 8,300 imp gal); New tender: 18,000 US gal (68,000 L; 15,000 imp gal)
Firebox:
• Grate area	59 sq ft (5.5 m2)
Boiler:;
• Small tubes	2+1⁄4 in (57 mm)
• Large tubes	5+1⁄2 in (140 mm)
Boiler pressure	200 psi (1,400 kPa)
Feedwater heater	Worthington
Heating surface:
• Firebox	254.00 sq ft (23.597 m2)
• Tubes	2,179.00 sq ft (202.436 m2)
• Arch tubes	33.00 sq ft (3.066 m2)
• Flues	905.00 sq ft (84.077 m2)
• Tubes and flues	3,409.00 sq ft (316.706 m2)
• Total surface	4,178.00 sq ft (388.149 m2)
Superheater:;
• Heating area	769.00 sq ft (71.442 m2)
Cylinders	Two
Cylinder size	27 in × 30 in (690 mm × 760 mm)
Valve gear	Walschaerts
Tractive effort
Performance figures
Tractive effort	58,090 lbf (258.40 kN)
Factor of adh.	3.85
Operators
Career
Operators	Chicago, Burlington and Quincy Railroad; Bristol and North Western Railroad; Grand Canyon Railway
Class	CB&Q O-1A
Numbers	4960
Nicknames	The Great Teacher (When hauling school trains); Tenshodo Mikado (When painted brass); The Green Machine
Retired	July 17, 1966 (1st excursion service); March 1985 (2nd excursion service)
Restored	March 1, 1981 (2nd excursion service); July 27, 1996 (3rd excursion service)
Current owner	Grand Canyon Railway
Disposition	Operational

Grand Canyon Railway 4960 is a preserved O-1A class 2-8-2 "Mikado" type steam locomotive built in August 1923 by the Baldwin Locomotive Works for the Chicago, Burlington and Quincy (CB&Q) Railroad. It was used by the CB&Q to pull freight trains, until 1958, when the locomotive pulled its first excursion fantrip, as part of the railroad's steam excursion program.

No. 4960, along with 4-8-4 No. 5632, went on to pull several more trains for the steam program, including a train that was dedicated to the CB&Q's connection to Casper, Wyoming. In July 1966, the CB&Q discontinued their steam program, following a rise in insurance costs, a loss of experienced steam-age mechanics, and a change of management.

No. 4960 was subsequently donated to the Circus World Museum (CWM) of Baraboo, Wisconsin, who in turn donated it to the Mid-Continent Railway Museum (MCRM) of North Freedom, Wisconsin. In the early 1980s, the Bristol and North Western (B&NW) Railroad leased the locomotive for use on their tourist operation between Benhams and Bristol, Virginia. No. 4960's time on the B&NW was short-lived, and in 1985, the locomotive was moved to New Haven, Indiana for storage.

In 1989, the Grand Canyon Railway (GCR) purchased No. 4960 at an undisclosed cost, and a few years later, it was moved to the Railway's location in Williams, Arizona. At Williams, No. 4960 was extensively reconditioned with multiple modifications to improve its performance and cosmetics, abandoning its original CB&Q livery. It entered service for GCR in July 1996, and No. 4960 began pulling the Railway's passenger trains between Williams and the South Rim of the Grand Canyon.

In 2008, GCR's new owner, Xanterra, discontinued steam operations, but they resumed for limited service the following year, with No. 4960 being converted to burn waste vegetable oil. As of 2024, No. 4960 remains operational at GCR, and it serves as a stablemate to Ex-Lake Superior and Ishpeming (LS&I) 2-8-0 No. 29. Additionally, No. 4960 is the only ex-CB&Q steam locomotive in operation.

^ Stowe (1966), p. 5

[Overview-1] Stowe (1966), p. 5

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