NER 1001 Class

NER 1001 Class
Power type	Steam
Builder	NER Darlington and Shildon
Build date	1852-1875
Total produced	192
Configuration	0-6-0
Driver diameter	5 ft ½ in (1.537 m)
Wheelbase	11 ft 10 in (3.61 m) locomotive 11 ft 0 in (3.35 m) tender 36 ft 2 in (11.02 m) total
Axle load	14.1 long tons (14.3 t)
Locomotive weight	35.2 long tons (35.8 t)
Tender weight	22.1 long tons (22.5 t)
Locomotive & tender combined weight	57.3 long tons (58.2 t)
Boiler	4 ft 3 in (1.30 m) diameter
Boiler pressure	140 psi (0.97 MPa)
Firegrate area	13.3 sq ft (1.24 m2)
Heating surface: Tubes	1,229.25 sq ft (114.201 m2)
Heating surface: Firebox	92.5 sq ft (8.59 m2)
Heating surface: Total	1,321.75 sq ft (122.795 m2)
Cylinders	2 (inside)
Cylinder size	17 × 26 in (430 × 660 mm)
Valve gear	Stephenson
Tractive effort	14,750 lbf (65.6 kN)
Career	North Eastern Railway London & North Eastern Railway
Retired	all retired by 1923
Disposition	1 preserved (No. 1275), remainder scrapped

The North Eastern Railway (NER) 1001 Class was a class of "long-boiler" 0-6-0 steam locomotive designed in Britain.

Technical data

A NER 1001 class locomotive weighed about 35 tons, with a wheelbase of 11 ft 10 in (3.61 m) and 5 ft 0.5 in (1.537 m) diameter driven wheels. Its 4 ft 3 in (1.30 m) diameter boiler produced over 7 tons of tractive effort at 140 psi.

History

The "long boiler" design dated back to a Stephenson design of 1842. At that time there was a controversy about keeping the centre of gravity low. Another point of view was espoused by John Gray who set out to improve efficiency and increase the pressure in shorter boilers using single drivers instead of coupled wheels. His ideas led to the design of the highly successful Jenny Lind locomotive.

The long boiler design with coupled wheels continued for slower heavier work. A total of 192 NER 1001 class locomotives were built from 1852 by a number of private manufacturers, as well as the NER's own works at Darlington and Shildon.

The small size of the firebox would seem remarkable in later years, but the engines were ideal where trains might spend long periods standing, waiting for a path, or when shunting. A minimum amount of fuel would have delivered sufficient heat to the large boiler to start heavy loads.

The last ten NER 1001's were delivered in 1875. Many were rebuilt in the following twenty five years. The last was withdrawn in 1923.

Having travelled an official mileage of 908,984 miles (1,462,868 km), locomotive number 1275 is preserved at the National Railway Museum in York.

External links

• The Bouch NER '1001' Class 0-6-0 Locomotives
• The Great Western Archive