NZR F class

New Zealand F class
F Class steam locomotive NZR 248 "McCallum Mhor", 0-6-0T type. Godber Collection, Alexander Turnbull Library.[1]
Type and origin Power type Steam Builder Neilson & Co. (12); Dübs & Co. (21); Vulcan Foundry (5); Avonside Engine Co. (26); Robert Stephenson and Company (12); Yorkshire Engine Company (11); Black, Hawthorn & Co (1) Total produced 88
Specifications Configuration: ​  • Whyte 0-6-0ST Driver dia. 36 in (914 mm) Wheelbase 10 ft 6 in (3,200 mm) Length 23 ft 3+1⁄2 in (7,099 mm) Loco weight 19.2 long tons (21.5 short tons; 19.5 tonnes) Fuel type Coal Fuel capacity 0.95 long tons (1.06 short tons; 0.97 tonnes) Water cap. 350 imp gal (1,600 L; 420 US gal) Firebox: ​  • Grate area 9.5 sq ft (0.88 m2) Boiler pressure 130 psi (0.90 MPa) Heating surface 486 sq ft (45.2 m2) Cylinders Two, outside Cylinder size 10.5 in × 18 in (267 mm × 457 mm)
Performance figures Tractive effort 5,733 lbf (25.50 kN)
Career Nicknames Peveril/Edie Ochiltree (13) Meg Merrilies (180) Rob Roy (111) Ada (233) McCallum Mhor (248) Disposition 15 preserved, remainder scrapped

The NZR F class was the first important class of steam locomotive built to operate on New Zealand's railway network after the national gauge of 3 ft 6 in (1,067 mm) was adopted. The first locomotives built for the new gauge railways were two E class double Fairlies for the Dunedin and Port Chalmers Railway Company. The F class was the first class ordered by the central government, and between 1872 and 1888, a total of eighty-eight members of the class were constructed.^[2]