U.S. Centennial of Flight Commission home page
This design of Castel in 1878 consisted of eight double screws that rotated in opposite directions by a double-cylinder compre

This design of Castel in 1878 consisted of eight double screws that rotated in opposite directions by a double-cylinder compressed-air engine. It lifted off but smashed against a wall and was destroyed.

Credits - Gary Bradshaw; To Fly Is Everything