Big Boy’s roaring up the ceremonial rails seemed improbable, considering that all eight existing units of the Big Boy–class steam engines had been decommissioned long ago. The 4014, built in 1941, went to bed in 1961, and spent the next 52 years resting at RailGiants Train Museum in Pomona, California.
At 132 feet long, the Big Boys’ frames had to be hinged so they could navigate curves. They weighed 1.2 million pounds, meaning any long-term forward motion necessitated that their 56,000-pound coal capacity and their 24,000-gallon water capacity be full to push those massive pistons with steam.
Its girth requires a 4-8-8-4 wheel configuration to keep it rock-steady on the rails. With a puny 7,000 horsepower, Big Boys had a maximum tractive power of 135,375 pounds, all to pull huge loads of freight across steep grades in Utah’s Wasatch Mountains and the Rockies.
Denne historien er fra October 2019-utgaven av Popular Mechanics.
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Denne historien er fra October 2019-utgaven av Popular Mechanics.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
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ONE OF THE 'GREATEST THREATS' TO THE PACIFIC NORTHWEST ISN'T WHAT YOU THINK.
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THE WORLD'S TOUGHEST ROW
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Quantum Entanglement in Our Brains
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The Tools of Copernicus
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This Ancient Fossil With a Brain and Guts
WE KNOW WHAT FOSSILS LOOK like. For example, typical dinosaur fossils are bones turned to stone and preserved from the passage of time, located, if we're particularly lucky, in large collections that can be reassembled to represent the beast they used to prop up in their entirety.