The US Navy includes a mechanical battery that could power laser weapons

THE UNITED STATES Navy includes a mechanical battery predicated on spinning flywheels, which store energy as they spin and may discharge it in an instant burst when stopped. It may be used to power laser weapons or railguns, or to store energy for homes.

Generators provide sustained power, but can’t be cranked up for the short bursts of high power that are necessary for directed energy weapons and railguns. For these, the united states Navy currently …

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