In 1936, Montreal Locomotive Works delivered five streamlined 4-8-4s to the Canadian National, Nos. 6400-6404. These class U-4-a engines were high-speed passenger power, handling premier limiteds until the end of steam. They had 77-inch drivers, 24x30-inch cylinders, and 275 pounds per square inch of boiler pressure. Weighing 379,800 pounds without tender, they developed a tractive effort of 52,500 pounds. Their evaporative heating surface totaled 3861 square feet, and the had a superheating surface of 1530 square feet. This photo from Elwin K. Heath shows No. 6403 near the famed Turcot roundhouse at Montréal, being readied for her first run under steam when new.