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>I heard that airliners can't land with a full load of fuel and they have to dump it to land in an emergency

I think the main reason they do that is that way there's less stuff to burn if there's a fire or explosion.




No the main reason is with equal weight it is way harder on the airframe to land than take off.

Electric airplanes are small so it's not as a big of a deal, but it will limit their ability to scale.




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