The Pollitt X4 (GCR Class 13) 4-2-2 Singles "Singles", locomotives with single driving axles, were a popular design for express passenger locomotives during the middle of the 19th Century. As train loads grew, they went out of fashion, but had a brief renaissance after steam sanding gear appeared in 1886.

The LNER used the designation "X" for all of the single-driver locomotives that it inherited. These had 4-2-2 and 2-2-4T wheel arrangements. Three types (X1, X2, and X3) of 2-2-4T tank engines came from the North Eastern Railway (NER) and were used to …

After the grouping both the Class X and Class Y became LNER Class Z5. This was changed in 1927 when the Class X was redesignated LNER Class Z4. [2]

A number of different numbering and classification schemes were used for the locomotives owned by the London and North Eastern Railway (LNER) and its constituent companies. This page explains the principal systems that were used.

The London and North Eastern Railway (LNER) produced several classes of locomotive, mostly to the designs of Nigel Gresley, characterised by a three-cylinder layout with a parallel boiler and round-topped firebox.

Class X4. Class Details Pollitt GCR Class 13, 6 engines. Weight: 49 tons 17 cwt; Pressure: 160psi; Cyls: 19 x26; DW: 7ft 9; TE: 14,457 lbs. Last 'singles' class introduced in the UK, and the only 'singles' class to be later superheated.

This locomotive was originally built in 1874 as an 0-4-4T B.T.P (Bogie Tank Passenger) locomotive (LNER G6). It was given the number 957, which it kept for its entire life. It was rebuilt into a 2-2-4T in April 1903 specifically for hauling an officer's saloon. This rebuild included a new boiler and cylinders.

This download shows the number of locomotives built for LNER stock for each year from 1923 to 1947, plus locomotives of LNER design built after nationalisation. It combines the annual figures given in the Locomotive Policy and Construction section of Volume 1 (pp15-21).

GCR Class 13 4-2-2 No. 967 (LNER X4). The class 13 single was the only true Pollitt engine for passenger work. Most of the other engin...

Class: Wheel Arr. Dr. Dia. Cylinders Dia. x Stroke: Boiler Press. Ad. Wt. EW WO: Grate Area: Evap. Surface: Sup. Surface: Remarks: 1: 4-6-0: 81in: 21½x26in: 180psi ...