netcurmudgeon (netcurmudgeon) wrote,
netcurmudgeon
netcurmudgeon

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For comparrison's sake

Here's a little perspective for you. This titanic strip-mining machine, one of the largest mobile machines on Earth, needs just over 22,000 HP to run. It can move 240,000 tons of earth a day. This nimble jet fighter, the F-35B Joint Strike Fighter, has a vertical landing capability. Half of the vertical thrust comes from a lifting fan just behind the cockpit (the other half coming from aiming the jet exhaust down) -- the fan is driven by a shaft running from the jet engine. That drive shaft, and the 90° gearbox that drives the fan have to handle 26,000 HP.

...Move a quarter of a million tons of soil in a day, or hover a jet fighter; both take the same rough order of horsepower.
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