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Comment by DonHopkins

9 hours ago

Much worse, obviously.

That's not at all obvious to me. Please explain. Both are approximately car sized and both are likely to hit pedestrians.

In a place with fewer pedestrians I'd buy that airborne vehicles might have a higher chance of hitting a person because they could crash somewhere that a traditional taxi couldn't. But when the place is packed wall to wall with people an arms length away I don't think that applies anymore. At least it doesn't seem self evident to me.

  • Consider that not all malfunctions of a car leads it to crashing into things. The fuel system, the engine, the transmission and even the steering can completely break down and the car will still came to a stop. They are equipped with redundant brakes, and are always supported by the ground.

    At the same time an aircraft is much more precarious. If anything in the fuel, engine, transmission, props, or control surfaces go wrong it will come down and fast. They have much more potential energy than a car (because they are high up). They also typically have much more kinetic energy because they have to move faster to maintain lift if they are fixed winged, or they have to have fast rotating parts if they are rotary winged.

  • In crowded streets cars obviously go slow, and in any case most traffic accidents don't result in a car starting accelerating uncontrollably until it runs into a building.

    Even a 20 m flight height means the taxi will reach 72 km/h before it hits the ground.

  • > Both are approximately car sized and both are likely to hit pedestrians.

    Would you rather be hit by Skoda Octavia travelling at around 20mph out of control, or a "flying taxi" travelling at 110mph out of control?

    Because that's how fast it would be travelling when it fell on you.