I believe the first minecraft Rotodyne ever made. Don't quote me on this but I had massive difficulty with this thing. It was produced in Britain in the 50s and 60s to combat traffic to airports in urban enviroments. Unfortunately the aircraft couldn't get funded by the government to get off the ground (no pun intended). Any info can be found in this video: https://www.youtube.com/watch?v=dkJOm1V77Xg