The GWR 5700 Class is a class of 0-6-0PT steam locomotive built by the Great Western Railway (GWR) and British Railways (BR) between 1929 and 1950. With 863 built, they were the most prolific class of the GWR, and one of the most numerous classes of British steam locomotive.
4634 at Newport High Street Station in 1954
No. 9701 at Paddington, showing the modified tanks and condensing apparatus
No. 3620 with a typical goods train at Southall station
No. 4601 with spark arresting chimney for shunting at the WD sidings at Milton
A tank locomotive or tank engine is a steam locomotive which carries its water in one or more on-board water tanks, instead of a more traditional tender. Most tank engines also have bunkers to hold fuel; in a tender-tank locomotive a tender holds some or all of the fuel, and may hold some water also.
LB&SCR J1 class
A typical side tank locomotive from 1897
An example with a tapered front and cut-out to give access to the valve gear
Large USA 2-8-2ST. Note the short tank, avoiding both firebox and smokebox