NBR H class

NBR Class I (LNER Class C10) NBR Class H (LNER Class C11)
Locomotive 872 Auld Reekie departs Edinburgh with an express passenger service.
Type and origin Power type Steam Designer William Paton Reid Builder North British Locomotive Co. (16) Robert Stephenson & Co. (6) Build date 1906 (1st batch) 1911 (2nd batch) 1921 (3rd batch) Total produced 22
Specifications Configuration: ​  • Whyte 4-4-2 Gauge 4 ft 8+1⁄2 in (1,435 mm) Leading dia. 3 ft 6 in (1.07 m) Coupled dia. 6 ft 9 in (2.06 m) Trailing dia. 4 ft 3 in (1.30 m) Length 59 feet Loco weight 119 tons 8cwt Fuel type coal Boiler pressure 190 psi (1,300 kPa) (C10) 180 psi (1,200 kPa) (C11) Cylinders two outside Cylinder size 20 in × 28 in (510 mm × 710 mm) (C10) 21 in × 28 in (530 mm × 710 mm) (C11)
Performance figures Tractive effort C10: 22,331 lbf (99.33 kN) C11: 23,324 lbf (103.75 kN)
Career Operators North British Railway London and North Eastern Railway Nicknames North British Atlantic Disposition One briefly preserved but then scrapped. None ultimately survived.

The North British Atlantic, later known as NBR Class H, and then as LNER Class C11 was a class of 4-4-2 steam locomotive of the North British Railway. The class was designed by William P. Reid, Locomotive Superintendent of the NBR, and entered service under his direction. They were the heaviest, longest, and most powerful (by tractive effort) locomotives ever employed on the North British Railway.

The locomotives passed to the London and North Eastern Railway in 1923. They enjoyed long service, but most were withdrawn during 1936 and 1937, with none surviving into the nationalised British Railways system.

The NBR Class I, later known as LNER Class C10, was a temporary designation of some engines in this class (see below).