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Words_Are_Hrad t1_j5844xb wrote

Reply to comment by path_name in Successful test flight of Hydrogen-Electric Airplane could be key to zero-carbon flying. Aim for commercial 700 mile flight with 40-80 seater aircraft by 2027. by DisasterousGiraffe

They aren't possible... That's like saying we could put wind turbines on electric vehicles to power them forever and ever. That's not how thermodynamics works.

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path_name t1_j584g0b wrote

sorry i didn’t realise u were a physicist

  • i was referring to words not being that hard
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Knichols2176 t1_j587x4f wrote

Ok ELI5 please. I sincerely don’t understand why there can’t be a wind driven simple magnetic motor on an EV to recharge batteries understanding that there needs to be a switch and 2 systems of batteries. One charging while other is in use. This inability has been hard for me to grasp.

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Words_Are_Hrad t1_j58btq6 wrote

The wind turbine reducing the aerodynamics of the vehicle. Now your electric motor is having to put more power out to overcome the greater resistance the air is putting on the vehicle. If you had a wind turbine that captured energy with 100% efficiency and a motor that used that energy with 100% efficiency you would end up with the energy the wind turbine is making being exactly enough to overcome the additional air resistance the wind turbine puts on the vehicle. So at best you end up where you started but since those things can't be 100% efficient you only end up losing energy.

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