[cmurf]

Composite propellers aren't assured of surviving a drone strike. If any propeller were to crack essentially anywhere along its length, you're talking about tens of thousands of pounds of shearing force in operation. If the propeller separates, the imbalance very easily could cause the engine to dismount. If the engine departs the plane, the plane is no longer properly weight & balanced and will not be glidable, it will tail spin into the ground uncontrollable. So I completely reject the "is going to destroy the drone" comment.

Read FAR 33 and 35, and then also do a simple Google search about engine containment failures. They can be catastrophic despite the design and testing done. So I reject the "will contain" comment.

The difference with drones and hobby model aircraft is a moron can get and keep a drone airborne, model airplanes have analog input by a human and if you don't know how to fly "by the stick" with such airplanes, it's an expensive mistake very quickly.

In theory I have little problem with the idea of property owners being able to destroy overflying drones, but in practice this is covering vigilantism and is not compatible with civil society.

Inevitably there will have to be some regulation requiring drones to identify themselves (there's a color coded flashing LED proposal, that's like a license plate); from which police can look up the owner and operator and current flight plan; and then issue directly to the operator in real time either an order to cease current operation (return to home) or reveal operator location/ID.

We just can't have people shooting things out of the sky, and having them drop on someone's dog or kid in the back yard. It'll start neighborhood feuds that will not end well at all.