bl0rq t1_is67xjc wrote
Reply to comment by beatthestupidout in NASA has invented a new type of high-performance battery that researchers claim could be used to power fully electric airplanes. by phife_is_a_dawg
Modern jet engines are closer to 50%. And yes fuel pumps and whatnot have mass too. But so do the supporting things for the electric version. A electric motor about equal to a 787 engine output weighs at least as much. And both it and the battery would need cooling.
> The batteries are catching up in real terms faster than a simple comparison of densities would suggest
They are not. They are dense enough for many things (commuter cars) but not airplanes.
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