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Broadway Limited N 8659 Clinchfield Challenger 4-6-6-4 Steam Locomotive Stealth

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While primarily used for freight service across the UP system, a few were also assigned to passenger trains like the Portland Rose. The design and operational experience of the Challengers played a crucial role in shaping the renowned Big Boy locomotive type, which in turn influenced the design of the last three orders of Challengers.

Broadway Limited N 8653 Union Pacific Challenger 4-6-6-4 Steam Locomotive

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While primarily used for freight service across the UP system, a few were also assigned to passenger trains like the Portland Rose. The design and operational experience of the Challengers played a crucial role in shaping the renowned Big Boy locomotive type, which in turn influenced the design of the last three orders of Challengers.

Broadway Limited N 8656 Union Pacific Challenger 4-6-6-4 Steam Locomotive

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While primarily used for freight service across the UP system, a few were also assigned to passenger trains like the Portland Rose. The design and operational experience of the Challengers played a crucial role in shaping the renowned Big Boy locomotive type, which in turn influenced the design of the last three orders of Challengers.

Broadway Limited N 8651 Union Pacific Challenger 4-6-6-4 Steam Locomotive

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While primarily used for freight service across the UP system, a few were also assigned to passenger trains like the Portland Rose. The design and operational experience of the Challengers played a crucial role in shaping the renowned Big Boy locomotive type, which in turn influenced the design of the last three orders of Challengers.

Broadway Limited N 8657 Rio Grande D&RGW Challenger 4-6-6-4 Steam Locomotive

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While primarily used for freight service across the UP system, a few were also assigned to passenger trains like the Portland Rose. The design and operational experience of the Challengers played a crucial role in shaping the renowned Big Boy locomotive type, which in turn influenced the design of the last three orders of Challengers.

ATHEARN GENESIS G41175 HO UNION PACIFIC U50 TSUNAMI2 DCC & SOUND RD # 41

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Onboard DCC decoder with SoundTraxx Tsunami2 sound. Consequently, in the late 1950’s the Union Pacific began seeking ways to increase the horsepower of their locomotives in order to help improve train speeds without having to add more locomotives to their trains.