NZR K class (1877)

Specifications
Specifications
Configuration:;
• Whyte	2-4-2
• UIC	1′B1′ n2
Gauge	3 ft 6 in (1,067 mm)
Leading dia.	30.25 in (768 mm)
Driver dia.	48 in (1,219 mm)
Trailing dia.	30.25 in (768 mm)
Length	45 ft 7 in (13.89 m)
Adhesive weight	14.8 long tons (15.0 t; 16.6 short tons)
Loco weight	23.3 long tons (23.7 t; 26.1 short tons)
Tender weight	19.2 long tons (19.5 t; 21.5 short tons)
Total weight	42.5 long tons (43.2 t; 47.6 short tons)
Fuel type	Coal
Fuel capacity	2.2 long tons (2.24 t; 2.46 short tons)
Water cap.	1,250 imp gal (5,700 L; 1,500 US gal)
Firebox:
• Grate area	8.8 sq ft (0.82 m2) (Original) 10.2 sq ft (0.95 m2) (Re-boilered)
Boiler pressure	130 psi (896 kPa) (Original) 160 psi (1,103 kPa) (Re-boilered)
Heating surface	589 sq ft (54.7 m2)
Cylinders	Two
Cylinder size	12 in × 20 in (305 mm × 508 mm)
Valve gear	Stephenson link motion
Valve type	Slide valves
Valve travel	4 in (102 mm)
Valve lap	0.9375 in (24 mm)
Valve lead	0.09375 in (2 mm)

Type and origin
Type and origin
Power type	Steam
Builder	Rogers Locomotive Works, New Jersey, USA
Serial number	2454 - 2455 ; 2469 - 2474
Build date	1877 – 1878
Total produced	8

NZR K class (1877)
NZR K class (1877)
	K 88 at The Plains Railway in 2013.
Power type
Type and origin
Power type	Steam
Builder	Rogers Locomotive Works, New Jersey, USA
Serial number	2454 - 2455 ; 2469 - 2474
Build date	1877 – 1878
Total produced	8
Configuration:;
Specifications
Configuration:;
• Whyte	2-4-2
• UIC	1′B1′ n2
Gauge	3 ft 6 in (1,067 mm)
Leading dia.	30.25 in (768 mm)
Driver dia.	48 in (1,219 mm)
Trailing dia.	30.25 in (768 mm)
Length	45 ft 7 in (13.89 m)
Adhesive weight	14.8 long tons (15.0 t; 16.6 short tons)
Loco weight	23.3 long tons (23.7 t; 26.1 short tons)
Tender weight	19.2 long tons (19.5 t; 21.5 short tons)
Total weight	42.5 long tons (43.2 t; 47.6 short tons)
Fuel type	Coal
Fuel capacity	2.2 long tons (2.24 t; 2.46 short tons)
Water cap.	1,250 imp gal (5,700 L; 1,500 US gal)
Firebox:
• Grate area	8.8 sq ft (0.82 m2) (Original) 10.2 sq ft (0.95 m2) (Re-boilered)
Boiler pressure	130 psi (896 kPa) (Original) 160 psi (1,103 kPa) (Re-boilered)
Heating surface	589 sq ft (54.7 m2)
Cylinders	Two
Cylinder size	12 in × 20 in (305 mm × 508 mm)
Valve gear	Stephenson link motion
Valve type	Slide valves
Valve travel	4 in (102 mm)
Valve lap	0.9375 in (24 mm)
Valve lead	0.09375 in (2 mm)
Tractive effort
Performance figures
Tractive effort	6,240 lbf (27.8 kN) (Original) 7,500 lbf (33 kN) (Re-boilered)
Class
Career
Class	K
Numbers	87 - 88 ; 92 - 97
First run	9 March 1878
Last run	June 1927
Preserved	3
Disposition	3 preserved, 5 scrapped

The NZR K class of 1877 was the first example of American-built locomotives to be used on New Zealand's rail network. Their success coloured locomotive development in New Zealand until the end of steam.

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