NBR H class

Specifications
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 ft (18 m)
Loco weight	119 long tons 8 cwt (267,500 lb or 121.3 t)
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)

Type and origin
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

NBR Class I (LNER Class C10)
NBR Class H (LNER Class C11)
NBR Class I (LNER Class C10) ; NBR Class H (LNER Class C11)
	NBR H class No. 868 Aberdonian
Power type
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
Configuration:;
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 ft (18 m)
Loco weight	119 long tons 8 cwt (267,500 lb or 121.3 t)
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)
Tractive effort
Performance figures
Tractive effort	C10: 22,331 lbf (99.33 kN); C11: 23,324 lbf (103.75 kN)
Operators
Career
Operators	North British Railway; London and North Eastern Railway
Nicknames	North British Atlantic
Withdrawn	1933-1937
Disposition	All scrapped

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 They had a long service life, but most were withdrawn during 1936 and 1937, with none surviving into the nationalized British Railways system.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).