>The earlier ones hit a crane which one could argue was an edge case as a temporary structure.

I would expect them not to fly into any kind of structure. That they'd hit a crane is pretty insane considering what the results of something like that could be.

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hermannj314 3 hours ago | parent | next [-]

Zero? I think the expected number of collisions can be larger than zero. Jimmy Johns sandwich delivery by bicycle has resulted in more collisions than zero and that is arguably safe.

You are setting an impossible standard.

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sejje 3 hours ago | parent | prev [-]

I would expect the result to be the same as running into anything else: drone and any payload crash into the ground.

Drones are lightweight, they're not going to do much to heavy machinery. Basically the same as a brick wall.

The real fear is propellers hitting a human. The result is not good at all.

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ncallaway 3 hours ago | parent | next [-]

Also drone and payload falling to the ground from any kind of height could cause serious injury or death if it falls on someone.

	▲	coldcode 2 hours ago \| parent \| next [-]
		Which is the argument against flying cars. Uncontrolled flying car crashes over populated areas could be catastrophic.
	▲	ares623 2 hours ago \| parent \| prev [-]
		Easy, don't walk near buildings then! /s

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BurningFrog 2 hours ago | parent | prev | next [-]

I expect some kind of automatic drone parachute system to develop.

	▲	sejje 7 minutes ago \| parent [-]
		I think parachutes take more height to work properly, compared to building heights. Maybe if they fly at much higher altitudes for most of the flight.

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DasIch 2 hours ago | parent | prev [-]

They weigh 80-85lbs and travel at speeds of around 50mph.

The impact would be quite serious, if they crash at speed but even falling on a car or a human would be quite serious, possibly deadly, even if the propellers don't spin.