Built: 1950 in Scotland, by The North British Locomotive Company

Configuration:

 4-8-2

Gauge:

 3ft 6in 

Bore and Stroke

18 x 26 inches

Axle loading:

11 tons

Driving Wheels:

4ft 6in (54 inches)

Heating Surface:

1469 sq feet

Superheater:

283 sq feet

Steam Pressure:

200 PSI max

Grate Area:

39 sq feet

Coal Load:

Oil fired

Water Load:

4000 gallons

Tractive Effort:

24960lbs

Valve Gear Type:

Baker

Weight:

69.1 tons (engine), 40.3 tons (tender). Total 109.4 tons

Adhesive Weight:

44.7 tons

Length:

66 feet 11½ inches

Operating Speed:

43 ½ mph

Approx Power:

 1200 hp max (under ideal operating conditions)

Ja1275 was the first of the Ja’s built by The North British Locomotive Company.  Ja1275 was retired in March 1968 and was purchased by Les Hostick. It was put into storage at Te Awamutu Railway Museum until 1994 when it was leased to Mainline Steam. It was moved to Mainline Steam's Parnell depot where it has undergone an extensive overhaul returning to service in October 2004.