NZR BA class

Specifications
Specifications
Configuration:;
• Whyte	4-8-0
Gauge	3 ft 6 in (1,067 mm)
Driver dia.	42.5 in (1,080 mm)
Length	52 ft 3 in (15.93 m)
Adhesive weight	32.3 long tons (32.8 t)
Loco weight	43.9 long tons (44.6 t; 49.2 short tons)
Tender weight	25.5 long tons (25.9 t; 28.6 short tons)
Total weight	69.4 long tons (70.5 t; 77.7 short tons)
Fuel type	Coal
Fuel capacity	4.0 long tons (4.1 t; 4.5 short tons)
Water cap.	1,700 imp gal (7,700 L; 2,000 US gal)
Firebox:
• Grate area	16.7 square feet (1.55 m2) original ; 26.4 square feet (2.45 m2) rebuild
Boiler pressure	175 psi (1,210 kPa) original ; 200 psi (1,400 kPa) rebuild
Superheater:;
• Heating area	206 square feet (19.1 m2)
Cylinders	Two
Cylinder size	16 in × 22 in (406 mm × 559 mm)

NZR B^A class
NZR BA class
	BA 552 at Mainline Steam's former Parnell depot in 2010.
Power type
Type and origin
Power type	Steam
Builder	NZR Addington Workshops
Build date	1911 - 1913
Configuration:;
Specifications
Configuration:;
• Whyte	4-8-0
Gauge	3 ft 6 in (1,067 mm)
Driver dia.	42.5 in (1,080 mm)
Length	52 ft 3 in (15.93 m)
Adhesive weight	32.3 long tons (32.8 t)
Loco weight	43.9 long tons (44.6 t; 49.2 short tons)
Tender weight	25.5 long tons (25.9 t; 28.6 short tons)
Total weight	69.4 long tons (70.5 t; 77.7 short tons)
Fuel type	Coal
Fuel capacity	4.0 long tons (4.1 t; 4.5 short tons)
Water cap.	1,700 imp gal (7,700 L; 2,000 US gal)
Firebox:
• Grate area	16.7 square feet (1.55 m2) original ; 26.4 square feet (2.45 m2) rebuild
Boiler pressure	175 psi (1,210 kPa) original ; 200 psi (1,400 kPa) rebuild
Superheater:;
• Heating area	206 square feet (19.1 m2)
Cylinders	Two
Cylinder size	16 in × 22 in (406 mm × 559 mm)
Maximum speed
Performance figures
Maximum speed	30 mph (48 km/h)
Tractive effort	18,550 lbf (82,500 N) original ; 21,200 lbf (94,000 N) rebuild
Number in class
Career
Number in class	10
Numbers	148, 497 - 500, 551 - 555
Locale	Otago and Southland
First run	November 1911
Last run	June 1969
Preserved	One (BA 552)
Disposition	One preserved, remainder scrapped

The B^A class was a class of steam locomotive built by the New Zealand Railways Department (NZR) for use on New Zealand's national rail network. The first B^A entered service in November 1911, with the last of the 11 class members introduced on 14 May 1913.^[1]