C&O's Allegheny Exposed — The Steam Giant That Quietly Outpowered The Big Boy
The Chesapeake and Ohio Class H-8 Allegheny was arguably the most powerful reciprocating steam locomotive ever tested in regular service, yet history largely forgot it. Built by Lima Locomotive Works, this 770,000-pound articulated giant produced 7,498 drawbar horsepower hauling coal over the Appalachians. This video examines its radical firebox design, six-wheel trailing truck, Baker valve gear, and the brutal track destruction that sealed its fate against dieselization.
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