4F

Originally introduced by the Midland Railway, it says a lot that the LMS continued to produce this class of locomotive until 1941. It was intended to be an attempt to reduce the need for the Midland Railway for double-heading their freight trains; whether or not it was successful in this is debatable as compared to later LMS designs it wasn't all that powerful. It also suffered the typical Midland design weaknesses in the front end design and the axlebox bearings. However they were of a robust and simple construction and so it is perhaps not too surprising that the LMS continued with their construction, even after class

Technical Data

Introduced : 1911
Number built : 772
Wheel arrangement : 0-6-0

Class 4F Freight Locomotive

Class 4F no. 44422 on Wansford Turntable, Nene Valley Railway, 25th April, 2010

Preservation

4 of the class survive in preservation

3924 - Located at the Keighley and Worth Valley Railway, operational

4027 - Located at the Gloucestershire Warwickshire Railway, under overhaul

4123 - Located at the Avon Valley Railway, undergoing restoration

4422 - Undergoing overhaul.

5F and 8F locomotives were introduced. It was only the post-war Ivatt designs that finally removed the need for any more of this class to be constructed.

Numbers	Location Built	Year Built
3835-3826	Derby	1911
3837-3851	Derby	1917
3852-3901	Derby	1918 - 1919
3902-3936	Derby	1920 - 1921
3937-3986	Armstrong Whitworth	1921 -1922
3987-4026	Derby	1921 -1922
SDJR 57-61	Armstrong Whitworth	1921 -1922

Numbers	Location Built	Year Built
4027-4034	Derby	1924-1925
4057-4081	North British	1925
4082-4106	Kerr, Stuart	1925-1926
4107-4176	Crewe	1924 -1926
4177-4178	St Rollox	1924
4179-4206	St Rollox	1926
4207-4301	Derby	1925-1927
4302-4311	Crewe	1926
4312-4331	St Rollox	1927-1928
4332-4356	Kerr, Stuart	1926-1927
4357-4381	Andrew Barclay	1926-1927
4382-4406	North British	1926-1927
4470-4436	Derby	1927
4437-4456	Crewe	1927-1928
4457-4466	Horwich	1928
4467-4476	St Rollox	1928
4477-4506	North British	1927
4507-4556	Crewe	1928
4562-4576	Crewe	1937
4577-4606	Derby	1939-1941

Note: The locomotives built for the Somerset and Dorset Railway in the above table were taken into LMS stock in 1930 and renumbered 4557-4561 (hence the gap in the table on the right).