In 1937, an order of 30 Class S-2s was delivered from Baldwin. These were given road numbers 201 through 230. A second order of 10 Class S-2s were delivered from Baldwin in 1940 (road numbers 231 through 240). The Class S-2 Northerns weighed 490,450 lbs, had 74" drivers, 26 x 32 cylinders, 285 lbs psi and had a tractive effort of 70,800 lbs.
Because of wartime needs, another order of 10 (road numbers 260 through 269) Class S-3 Northerns was delivered in 1943 from the American Locomotive Company. This class was designed to have 74" drivers, 26 x 32 cylinders, 250 lbs psi boiler pressure and weighed 460,000 lbs and had a tractive effort of 62,040 pounds.
There are two survivors: number 261, which is operational and number 265 at the Illinois Railway Museum in Union, IL. When 261 is not running, it is stored at the old GN Shops near Minneapolis Junction in Minneapolis, MN.
| Class | Road Numbers | Year Built | Builder |
|---|---|---|---|
| S-1 | 250 (ex 9700) | 1930 | Baldwin |
| S-1 | 251 | 1938 | CMStP&P |
| S-2 | 201-230 | 1937 | Baldwin |
| S-2 | 231-240 | 1940 | Baldwin |
| S-3 | 260-269 | 1943 | ALCO |
| Specifications | |||
|---|---|---|---|
| Class S-1 | Class S-2 | Class S-3 | |
| Wheel Arrangement: | 4-8-4 | 4-8-4 | 4-8-4 |
| Length: | |||
| Drivers: | 74" dia. | 74" dia. | 74" dia. |
| Weight on Drivers: | 258,815 lbs | 289,147 lbs | |
| Locomotive Weight: | 450,840 lbs | 493,550 lbs | 460,000 lbs |
| Locomotive & Tender Weight: | 740,000 lbs | 885,850 lbs | |
| Grate Area: | 103 sq ft | 106 sq ft | |
| Cylinders (dia. x stroke): | (2) 28" x 30" | (2) 26" x 32" | (2) 26" x 32" |
| Boiler Pressure: | 230 psi | 285 psi | 250 psi |
| Tractive Effort: | 60,000 lbs | 70,800 lbs | 62,040 lbs |
| Tender Capacity | |||
| Water: | 15,000 gals. | 20,000 gals. | |
| Coal: | 20 tons | 25 tons | |
| This page last modified: Thursday, 15-May-2008 23:26:54 CDT. | [Contact] | All material © 1999-2008 SteamLocomotive.com |
