When the GN superheated their only Atlantics--Vauclain balanced compounds (Locobase 6945)--i the mid-teens, at least two of the engines (1706-1707) retained the four-cylinder layout. This entry describes the superheated update once it included simple expansion. The heating surface areas in the modified 4-4-2 were identical those in the J-1S.

Class H-2-S/H-3-S - 2 1/4" tubes (Locobase 8820) Data from GN 1-1929 locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Locobase 8819 shows the original configuration of the GN's H-2 Pacifics.

GN's signature improved Belpaire firebox was joined to a combustion chamber that contributed 108 sq ft (10.03 sq m) to the firebox heating surface. Charles Wood described the S-1's face as "pump-heavy" with a low-mounted headlight.

In 1923, the GN received 28 Class P-2 "Mountains" from the Baldwin Locomotive Works. These locomotives were assigned road numbers 2500 through 2527 and had 29 x 28 cylinders, 73" drivers, a 200 psi boiler pressure, a tractive effort of 54,823 lbs …

Feb 22, 2004 · Described as rebuilds of M&GN 4-4-0s, these were in fact new engines delivered in 1904, 1909, and 1910 from a design by GB Clarke (Chief Draughtsman) at the direction of a Mr. Marriott, the joint line's Locomotive Engineer.

Class G-2 (Locobase 8847) Data from GN 1916 locomotive diagram book supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Brooks produced these in June (2973-2975), July (2982-2990), August (3045-3048), and September (3049-3052). Like all GN 4-8-0s, the G-2s had small drivers and Belpaire fireboxes.

It was further rebuilt by the GN as a 2-4-0T and last was used in late 1910 but survived long enough to have a diagram sheet made of it as part of the Valuation in 1915." Locobase notes how much bigger this steam motor than virtually all others, especially in its rebuilt configuration.

Sep 5, 2006 · Designed by Samuel Waite Johnson, this class of 4-4-0s served the jointly operated M&GN on the metals west of Lynn in East & Midland Railway territory. Sharp, Stewart produced the first 26 in 1894 and added seven in 1896.

In 1928, the Great Northern built fifteen 2-10-2s from fifteen Lima-built 4-8-2s which were GN numbers 1750 through 1764. These new "Santa Fes", numbered 2175 through 2189, had 63" diameter drivers, 29" x 32" cylinders, a 210 psi boiler pressure, they exerted 76,250 pounds of tractive effort and each weighed 364,000 pounds.

Number 900 (GN number 4000) returned in 1946 and number 901 (GN number 4001) returned in 1950, both being deemed surplus on the parent railroad. The two ALCO-built 4-6-6-4s received in 1944 were also oil burners and were designated Class Z-8 and given road numbers 910 and 911.