Delivery firm changes drone design after propeller detaches and hits man's head

The operator has redesigned the propeller hub, and has committed to changing from the current configuration to a new design consisting of a single propeller mounted on each arm. File picture: Dan Linehan

A delivery company has had to re-design its drones after a propeller came off and hit a man in the head, narrowly missing his eyes.

A report by the Department of Transport’s Air Accident Investigation Unit (AAIU) concluded the wrong type of propellers were being used and a propeller bolt hadn’t been on tight enough.