New York, Chicago & St Louis 4-6-2 "Pacific" Locomotives in the USA

Class K-1A/K-1B (Locobase 1385)

Data from NKP 5 - 1950 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Lima delivered four K-1A (works numbers were 6317-6320 in December 1922), Alco-Brooks six K-1B (works numbers were 64631-64636 in August 1923).

George Drury (1993) wrote that these were smaller and lighter than the USRA designs. All had 14" (356 mm) piston valves. The K-1As had slightly less evaporative heating surface and the firebox heating surface, which eventually included both arch tubes and thermic syphons and measured 239 sq ft (22.20 sq m) altogether, also amounted to less than the K-1Bs.

Boilers in three of the K-1Bs lost their Type As in favor of Type Es; this variant appears in Locobase 15630.

The other seven remained on the roster into the early 1950s when they were sold for scrap.

Class K-1B - Type E superheater (Locobase 15630)

Data from NKP 5 - 1931 and 2 - 1944 Locomotive Diagrams supplied in August 2013 by Allen Stanley from his extensive Rail Data Exchange.

The Nickel Plate took three of its Schenectady K-1B Pacifics and substantially altered the boiler by replacing the original Type A superheater with a Type E design that nominally offered 76% more superheater area.

Serving the NKP throughout the 1940s, the trio was disposed of in the early 1950s. 168 went to the ferro-knacker in August 1952, 164 followed in February 1953, and 169 closed the ledger when it was sold for scrap in June 1954.