Union Pacific 'Challenger' Production Details 

The Challengers were equipped with a unique articulated smoke hood over the stack, it was meant to redirect the exhaust output over the top of the train rather than allowing it to roll down the side. This was one of several approaches the Union Pacific used trying to achieve the desired result. Our model faithfully reproduces this equipment to the last detail, including the interlinking chains between segment of the hood. In this photo only half of the hood has been raised.