MTH Premier 20-21735-1 O Scale GE AC4400 Diesel Union Pacific UP 6297 PS3 Era_1949+ To bring its dynamic performance

To bring its dynamic performance to even more drivers

Large monster truck tires

High-strength glue and bead design

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Looking for a cool holiday gift for kids aged 10+

MTH Premier 20-21735-1 O Scale GE AC4400 Diesel Union Pacific UP 6297 PS3 Era_1949+ To bring its dynamic performanceMTH Premier 20 21735 1 O Scale GE AC4400 Diesel Union Pacific UP 6297 PS3 From the dawn of dieselization through its first six decades, virtually every American diesel locomotive used DC traction motors. By the early 1990s, however, a series of technological advances allowed designers to tap the inherent superiority of AC traction namely, the ability of an AC motor to start a heavier load than a DC motor, with the same prime mover. The superior