it is the big boy people
The Union Pacific Big Boy is often considered one of the strongest steam locomotives ever built. It was designed to handle steep mountain grades and heavy freight trains.
The heaviest steam locomotive ever built is the Union Pacific Big Boy, which weighed around 1.2 million pounds (540 metric tons). It was designed for hauling heavy freight trains over steep mountain passes.
Big boy
In steam it was either the UP "big boy" or the C&O 2-6-6-6. But the UP built some gas-turbines that were monsters.
The Big Boy Developed 6290 HP @ only 30 MPH
The largest locomotive in the world is the Union Pacific Big Boy, specifically the Big Boy 4014. It is a steam-powered locomotive with a 4-8-8-4 wheel arrangement, making it one of the largest and most powerful steam locomotives ever built.
Significantly. In the last 200 years the railroads, the locomotive builders, and significant industrial designers have all left a mostly beneficial mark upon the colorful history of steam locomotion. However the basic principals of boiling water to make steam, then forcing it into the pistons where the steam expands 40 times to push the piston back and forth haven't changed from the beginning. Most notably, the means of producing good steel helped boilers carry higher pressure steam, valve gears to regulate steam into the cyliners, wheel arrangements and major design changes for improved tractive effort, speed, ease of maintenence or reliability have all been implemented since the birth of the locomotive in 1804. To see the most drastic comparison, compare stephenson's rocket to a UP 4-8-8-4 big boy.
the union pacific big boy and the union pacific challenger
Significantly. In the last 200 years the railroads, the locomotive builders, and significant industrial designers have all left a mostly beneficial mark upon the colorful history of steam locomotion. However the basic principals of boiling water to make steam, then forcing it into the pistons where the steam expands 40 times to push the piston back and forth haven't changed from the beginning. Most notably, the means of producing good steel helped boilers carry higher pressure steam, valve gears to regulate steam into the cyliners, wheel arrangements and major design changes for improved tractive effort, speed, ease of maintenence or reliability have all been implemented since the birth of the locomotive in 1804. To see the most drastic comparison, compare stephenson's rocket to a UP 4-8-8-4 big boy.
William W. Kratville has written: 'The Union Pacific type' -- subject(s): Union Pacific (Locomotive), Union Pacific Railroad Company 'Little look at Big Boy' -- subject(s): Big Boy (Locomotive), Union Pacific Railroad Company 'The war engines' -- subject(s): Locomotives, Union Pacific Railroad Company 'Little look at the Challengers' -- subject(s): Challenger (Locomotive), Union Pacific Railroad Company
It is generally regarded the Union Pacific (UP) Big Boys where the largest steam locomotives. They had a 4-8-8-4 wheel arrangement, with a overall length of 132 ft 9 1⁄4 in (40.47 m), and a total weight of 1,250,000 lb (762,000 lb locomotive, 342,200 lb tender). They had a traction effort of 135,375 lbf and a adhesion factor of 4.1, and burned coal. It last ran in July of 1959. There is some disagreement on the size, there where other locomotives with higher wheel arrangements, but these were not as heavy or as powerful. UP holds the claim though that their Big Boy was the largest.