NZR H class

Specifications
Specifications
Configuration:;
• Whyte	0-4-2T
Gauge	3 ft 6 in (1,067 mm)
Wheel diameter	32 in (813 mm) driving ; 23.5 in (597 mm) adhesion
Wheelbase	14 ft 3 in (4.34 m)
Length	24 ft 1 in (7.34 m)
Width	8 ft 6 in (2.59 m)
Adhesive weight	32.4 long tons (32.9 t; 36.3 short tons)
Loco weight	39.8 long tons (40.4 t; 44.6 short tons)
Fuel type	Coal
Fuel capacity	0.5 long tons (0.51 t; 0.56 short tons)
Water cap.	714 imp gal (3,250 L; 857 US gal)
Firebox:
• Grate area	16.8 sq ft (1.6 m2)
Boiler pressure	160 psi (1,100 kPa)
Heating surface	794 sq ft (73.8 m2)
Cylinders	Four total ; two driving, two adhesion
Cylinder size	14 in × 16 in (356 mm × 406 mm) driving ; 12 in × 14 in (305 mm × 356 mm) adhesion
Valve gear	Stephenson (199 - 202) ; Joy (203 - 204)

Type and origin
Type and origin
Power type	Steam
Builder	Avonside Engine Co., England (4) ; Neilson & Co., Scotland (2)
Serial number	Avonside 1072–1075 ; Neilson 3468–3469
Build date	1875 (4) ; 1886 (2)

NZR H class
NZR H class
	H class 204, pictured in 1904
Power type
Type and origin
Power type	Steam
Builder	Avonside Engine Co., England (4) ; Neilson & Co., Scotland (2)
Serial number	Avonside 1072–1075 ; Neilson 3468–3469
Build date	1875 (4) ; 1886 (2)
Configuration:;
Specifications
Configuration:;
• Whyte	0-4-2T
Gauge	3 ft 6 in (1,067 mm)
Wheel diameter	32 in (813 mm) driving ; 23.5 in (597 mm) adhesion
Wheelbase	14 ft 3 in (4.34 m)
Length	24 ft 1 in (7.34 m)
Width	8 ft 6 in (2.59 m)
Adhesive weight	32.4 long tons (32.9 t; 36.3 short tons)
Loco weight	39.8 long tons (40.4 t; 44.6 short tons)
Fuel type	Coal
Fuel capacity	0.5 long tons (0.51 t; 0.56 short tons)
Water cap.	714 imp gal (3,250 L; 857 US gal)
Firebox:
• Grate area	16.8 sq ft (1.6 m2)
Boiler pressure	160 psi (1,100 kPa)
Heating surface	794 sq ft (73.8 m2)
Cylinders	Four total ; two driving, two adhesion
Cylinder size	14 in × 16 in (356 mm × 406 mm) driving ; 12 in × 14 in (305 mm × 356 mm) adhesion
Valve gear	Stephenson (199 - 202) ; Joy (203 - 204)
Maximum speed
Performance figures
Maximum speed	15 mph (24 km/h)
Tractive effort	12,550 lbf (55.8 kN) driving ; 11,000 lbf (49 kN) adhesion
Number in class
Career
Number in class	6
Numbers	199 – 204
Locale	Rimutaka Incline, Wairarapa, North Island
First run	1878
Last run	29 October 1955
Retired	March 1956
Preserved	One (H 199)
Restored	1981 - 1989
Scrapped	1956
Current owner	Fell Engine Museum
Disposition	5 scrapped ; 1 preserved ; 2 replicas planned.

The NZR H class steam locomotive was a unique class of Fell locomotive used by New Zealand Railways (NZR) on the Rimutaka Incline, the 3-mile (4.8 km) section of 1 in 15 (6.67 %) gradient between Cross Creek and Summit, over the Rimutaka Ranges.^[1]