Union Pacific
Big Boy No. 4017
The Big Boys' tenders were among the largest ever built and were carried on a fourteen wheel (4 + 10) centipede pedestal truck initially designed for use with UP's FEF 4-8-4 locomotives.
The Big Boys' tenders were among the largest ever built and were carried on a fourteen wheel (4 + 10) centipede pedestal truck initially designed for use with UP's FEF 4-8-4 locomotives.