Class J (Locobase 4093)

Taken from a table in Paul T Warner's article on Atlantics in the Railway & Locomotive Historical Society Bulletin #62 (1943, p 20), with additional information from

Angus Sinclair (ed), Railway and Locomotive Engineering, March 1903, p. 134. Works numbers were 22178, 22180, 22254, 22292 in May 1903; 22309, 22367 in June; and 23922

in March 1904.

This was a relatively small Atlantic designed by Superintendent of Motive Power W H Lewis that was delivered to the N&W in small numbers. Equalization was continuous along all 5 axles; adhesion weight could be adjusted by shifting the position of a spring that bore a casting that spanned the frame under the firebox.

See excerpt from article reproduced on http://www.usgennet.org/usa/topic/preservation/educator/book4/pg438.htm (4 April 2004). The N&W J is used as an example of the gains made when the builder put a trailing axle under the boiler.