Friday, February 13, 2015

Some info about the Big Boy locomotives


The Big Boys were 132 feet long and weighed 1.2 million pounds (engine and tender) in working order.

the 4014’s 14-wheel tender can hold 24,000 gallons of water and 28 tons (56,000 pounds) of coal.

The drive wheels in this locomotive class are 68“ tall, that's 5 feet 8 inches.

If a Big Boy was stood upright, it would be approximately as tall as a thirteen story building.

The Big Boy class measured just short of 133 feet long, weighed 1,208,750 pounds, averaged about 6,100 horsepower at speed.

For additional comparison purposes, the most powerful diesel engine was the EMD DDA40X, with 6600 horsepower. This class was also the longest and heaviest, at 98 feet and 521,980 pounds.

The longest class of locomotive ever built was the Norfolk and Western’s “Jawn Henry” steam- electric turbine prototype, which measured in at a massive 166 feet.
the Jawn Henry

The Chesapeak and Ohio’s M1 turbine, was a close contender, at 154 feet in length, and going by measurements in which the boiler is assumed to be full, but the tender is assumed to be empty, the CandO M1 at 1,233,970 pounds class is the heaviest steam locomotive.

the M1

 as was as the Pennsylvania Railroad’s failed S1 class at slightly more than 140 feet.

By these measurements, the Big Boy lacked 33 feet on the Jawn Henry class and come in fourth in terms of length. However, the three longest models were all prototypes. The railroads that owned them ordered only a handful of each class, and assigned them to very limited road service. In contrast, the Union Pacific ordered twenty five Big Boys, and used each of them frequently.


Going by measurements in which the boiler is assumed to be full, but the tender is assumed to be empty, the C&O M1 at 1,233,970 pounds class is the heaviest steam locomotive. The Big Boy class came in second, closely tailed by the Virginian AG “Allegenhy" class at 1,195,000 pounds.
http://www.friendsoftheflange.com/2014/11/bigger-boys.html#more
http://en.wikipedia.org/wiki/Steam_turbine_locomotive

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