How fast can a nuclear submarine go underwater?

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asked Oct 2, 2018 in Engineering by Ingridia (270 points)
How fast can a nuclear submarine go underwater?

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answered Oct 6, 2018 by Shelde (25,170 points)
The fastest a nuclear submarine can feasibly reach underwater is 46 MPH which is 40 knots.

Technically nuclear submarines could reach faster speeds but the power required to do so wouldn't be feasible since only so much fuel can be stored on board and the faster it goes the more fuel the submarine would use.

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