40 820 Feet Flight! | Incredible HELICOPTERS

In fact, it took several decades not only to fly a helicopter, but to allow the pilot to control it. It's hard to believe when we look at the flying machines we have today. These incredible helicopters use cutting-edge technology and have become so useful and powerful that it is difficult to imagine an air force without them. From powerful civilian luxury helicopters to fearsome military machines, check out these incredible helicopters.