The Fairy Rotodyne was a design intended for city centre operation that thanks to a rotor driven by tip jets was so noisy it presented a real danger to the hearing of anybody in its vicinity who was not wearing ear defenders.
O he who does it vertically
Before your time there but I was in the maintainance hangar @ Bedford when the rotodyne landed on the threashold of 09.
conversation was imposible and the vibration was amazing