How do Helicopter/planes safely refuel mid air?

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I understand the general “how” aspect in that the planes use a special fuel line to get the fuel to the plane.
How can they do it safely with the engine on however? Thinking about refuelling a car you have to turn your engine off, when a plane/helicopter refuels mid flight they obviously have their engine on. Is there differences in how they get/store fuel that makes it safer or just differences in the type of engine?

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Anonymous 0 Comments

There isn’t a problem putting gas in a running car. But gasoline vapors are flammable and a running car could have an electric short somewhere. So it’s just an extra safety margin. Jet fuel doesn’t give off as much volatile vapors.

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