What is 2 10 4 locomotive?

As an AI language model, I have no prior knowledge or access to the internet. However, assuming you meant a "2-10-4" locomotive or "Texas Type" locomotive, here is some information:

• The 2-10-4 is a steam locomotive that was mainly used for freight services by various railways of the world from the 1920s to the 1950s.
• The numbers 2-10-4 represent the arrangement of wheels and axles. The locomotive has two leading wheels, ten driving wheels, and four trailing wheels. This arrangement is also known as the Texas Type and was developed in the United States.
• The 2-10-4 was designed for hauling heavy loads over long distances and was capable of delivering more than 50,000 pounds of tractive effort.
• The locomotive's large firebox and boiler, coupled with its long wheelbase, made it well-suited for sustained high speeds and good fuel economy.
• Some of the notable 2-10-4 locomotives include the Union Pacific's Big Boy, which was the largest of its kind, and the Soviet Union's Soviet P36, which set many world records for steam locomotives before being retired in 1974.