One of world’s largest steam engines converted from coal to oil

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One of world’s largest steam engines converted from coal to oil

A worker walks past the wheels on the Big Boy No. 4014 at a Union Pacific restoration shop at the Cheyenne Depot Museum in Cheyenne, Wyo. The locomotive will tour the Union Pacific system throughout 2019 in honor of the Transcontinental Railroad’s 1869 completion.

One of world’s largest steam engines converted from coal to oil

A worker walks past the wheels on the Big Boy No. 4014 at a Union Pacific restoration shop at the Cheyenne Depot Museum in Cheyenne, Wyo. The locomotive will tour the Union Pacific system throughout 2019 in honor of the Transcontinental Railroad’s 1869 completion.

One of world’s largest steam engines converted from coal to oil

The Big Boy No. 4014 leaves a Union Pacific restoration shop at the Cheyenne Depot Museum on May 4 in Cheyenne, Wyo.