The Great Northern Railway (GNR) Class O2 was a class of three-cylinder 2-8-0 steam locomotives designed by Nigel Gresley for freight work and built by the GNR from 1921. Further examples were built by the London and North Eastern Railway (LNER) from 1924.

A GNR version is expected in 2023. PDK sell etched kits of most variants of the O2 for 4mm scale (OO gauge). 4mm scale whitemetal kits are also available from Nu-Cast for the O2/2 and O2/3 forms.

The GNR O2 was development of the O1, which initially differed almost only in the number and arrangement of the cylinders. Instead of the previous two cylinders, three smaller ones were now used to improve power transmission and smooth running.

The Great Northern Railway (GNR) Class O2 was a class of three-cylinder 2-8-0 steam locomotives designed by Nigel Gresley for freight work and built by the GNR from 1921. Further examples were built by the London and North Eastern Railway (LNER) from 1924.

Robinson launched his design for the GCR in 1911, while Gresley 's two-cylinder 1913 design on the GNR was followed by a three-cylinder version five years later. At Grouping (1923), the LNER inherited 179 2-8-0s.

No. 3841 was a class O2 2-8-0 steam locomotive that was built for the London, North Eastern Railway by Doncaster Works in 1942. BRDatabase.

Alongside on the right is O2/2 No. 63941 with its distinctive GNR-type cab and GNR tender. The O2 locomotives were powerful three-cylinder heavy mineral engines with a 2-8-0 wheel arrangement. The first, a prototype, was completed in May …

Gresley design GNR class O2. Weight 74-79 tons; Pressure: 180psi; Cyls(3): 18 x26; DW: 4 ft 8; TE: 36,470 lbs.

An O2 Prototype Engine Named Regaby. He Was Rebuilt Into O2 Prototype, Since He Was Built An B17 Engine. He Arrived On The Island Of Sodor For 1922. And He S...