3 ms·
I take it only cars and trains can use regenerative breaking. Or maybe ships and planes could use it to reduce speed, as when an aircraft comes into land, or a
by zeristor 5y ago
I take it only cars and trains can use regenerative breaking.
Or maybe ships and planes could use it to reduce speed, as when an aircraft comes into land, or a ship coming into port.
Though with that amount of power batteries wouldn’t be able to charge fast enough, and super capacitors would be added complexity.
- jodrellblank 5y agoSailboats with electric motors instead of diesel engines can use the motors to regenerate power; when under sail the motors are dragged backwards through the water forcing them to turn. (I don't know if that's useful enough for 'braking' as boats have fairly high mass and lots of inertia and travel slowly as it is, so gradually slowing down over a very long distance would just be annoying compared to a burst of reverse thrust to slow them down sharply)
- Chris2048 5y agoMaybe a space elevator could, But I'm not sure how a rocket would reclaim energy - from air drag on the way down?
- LargoLasskhyfv 5y agoWhy not? https://en.wikipedia.org/wiki/Ram_air_turbine https://en.wikipedia.org/wiki/Ram_air_turbine s exist :-)
- H8crilA 5y agoAirplanes already use "regenerative braking". When you're coming in to land the airspeed and altitude is used to move the aircraft forward, with reduced throttle on the engine. In fact it could be reduced to exactly idle, but that's just not the optimal setting, and in the final phase of the flight also not the safest setting (spooling up time of a turbojet engine depends a lot on the initial rpm, in case you need to go-around). There's no need for a capacitor when you have gravity and altitude.