The Grand Trunk Western's U-1-c Mountains, Nos. 6037-6041, had 26x30-inch cylinders, a driver diameter of 73 inches, and a boiler pressure of 210 p.s.i. Boasting a locomotive weight of 354,110 pounds, they produced 49,590 pounds of tractive force. With a grate area of 67 square feet, these engines had 4049 square feet of evaporative heating surface and a superheater surface of 1087 square feet. David V. Leonard, my late brother, snapped this image of No. 6040 at the Milwaukee Junction terminal in Detroit on September 2, 1958.