Super Large Steam Locomotive In The United States

Locomotive that ever existed and that there is a very large United States, where due to the heavy cruising terrain. The locomotives include:

Big Boy 4-8-8-4 

In 1941 Alco Locomotive Work in America make 25 large steam locomotives were super great and powerful named Big Boy, is reputedly the largest locomotives ever in the world. This locomotive is operated by Union Pacific United States as it navigates the tough mountainous terrain. 

In 1930 the Union Pacific should have experience doing help on the path to the Wasatch Ogden (USA), which is a series of train weighing 3,600 tons and with elevation 1.14%. Therefore, the Union Pacific locomotive super strong willed. Big Boy can carry 3,600 tons, 270,000 kg of traction, so it was decided with a 4-8-8-4 configuration (artinga 8 + 8 wheel drive, or series DD), and a speed of 150 km / h, and the vapor pressure of 300 psi. 

It is said that the last data recorded that Big Boy has an average wade 1,000,000 miles traveled, the largest locomotive 4006 with the position of 1,064,625 miles, while the smallest is the position of locomotive 4024 with 811 956 miles. Code 40 means made ​​in the 40s, the last two digits are the serial number. 

One of the Big Boy X-4014 US-owned Union Pacific

Challenger 4-6-6-4

Union Pacific had also had 105 Challenger Locomotive (Union Pacific 3985), which was made in 1936 to 1943, with a length of 30 meters and weighing 500 tons, and the arrangement of 4-6-6-4 wheel configuration (meaning 6 + 6 wheel drive, or series CC) with a speed of 150 km / h, so it is smaller than Big Boy. This locomotive is mainly for goods, but also for the passengers on the mountain path in the region of California and Oregon. 

One locomotive owned by Union Pacific Challebger USA 

UP 3985 locomotive designed by chief engineer Otto Jabelmann in 1941, and is part of the second order of the second version of the Challenger. This design relies heavily on recent experience with the 4-8-8-4 Big Boy locomotive, and produce a locomotive weighing about 287,577.5 kg and is accompanied by two thirds tender load weighing up to 157,850.2 kg. 

Original goal in creating the Challenger class is accelerating the transport operations from west to east at a steep Wasatch in Utah and western Wyoming. Wasatch itself conquered by the Big Boy locomotive without assistance. Challenger and Big Boy showed up right when traffic increased in preparation for the American involvement in World War II. 

One locomotive owned by Union Pacific Northern USA