Very smart design. No moving parts other than the motors.
Still, hitting one of these in a 152 could be fatal. Pilots are wary of drones for a reason. However, I think they'd be more receptive to the idea of Amazon using them than a random person (assuming Amazon cooperates with the FAA).
Still, hitting one of these in a 152 could be fatal. Pilots are wary of drones for a reason. However, I think they'd be more receptive to the idea of Amazon using them than a random person (assuming Amazon cooperates with the FAA).