Minneapolis, St. Paul & Sault Sainte Marie Northerns

The Minneapolis, St. Paul & Sault Sainte Marie Railroad purchased four Class O-20, 4-8-4s in 1938 from the Lima Locomotive Works. They were given road numbers 5000 through 5003 and were assigned to both freight and passenger trains.

These locomotives were designed with 75" drivers, 26 x 32 cylinders, a 270 psi boiler pressure, a weight of 445,550 pounds and had a tractive effort of 66,000 pounds.

There are no survivors.

Specifications for Class O-20

Wheel Arrangement: 4-8-4

Length: 101' - 10"

Drivers: 75" dia.

Weight on Drivers: 263,000 lbs

Locomotive Weight: 445,550 lbs

Locomotive & Tender Weight: 763,150 lbs

Grate Area: 88.3 sq ft

Cylinders (dia. x stroke): 26" x 32"

Boiler Pressure: 270 psi

Tractive Effort: 66,000 lbs

Tender Capacity: 17,500 gals. of water and 24 tons of coal.

Specifications for Class O-20
Wheel Arrangement:	4-8-4
Length:	101' - 10"
Drivers:	75" dia.
Weight on Drivers:	263,000 lbs
Locomotive Weight:	445,550 lbs
Locomotive & Tender Weight:	763,150 lbs
Grate Area:	88.3 sq ft
Cylinders (dia. x stroke):	26" x 32"
Boiler Pressure:	270 psi
Tractive Effort:	66,000 lbs
Tender Capacity:	17,500 gals. of water and 24 tons of coal.

Photos

References

Steam Trains of the Soo by Leslie V. Suprey (Cal Central Press)
Soo Line Historical Technical Society
3410 Kaston Court
Middleton, WI 53562