In this video, the team continues the construction of a four-seat experimental Hummingbird helicopter. They begin by cutting out the parts for the lower fuselage using a CNC plasma table [00:08]. The ...
Found and Explained Official on MSN

The giant Soviet helicopter that was too big to build

The Mi-32 was a secret Soviet heavy lift helicopter concept designed to carry loads far beyond the capability of any helicopter before or since. Featuring a triangular layout with three fuselages and ...