https://livinghistoryworldwide.com/a-fascinating-history-of-helicopters/
The history of the helicopters dates back into the dark ages or maybe more notably the 15 th century when Leonardo DaVinci released the sketch of their air screw. However, this medieval helicopter using parts for rotary wing air craft was never generated and also remained just over the sketch. Although, the first aircraft were developed from the 1930’s before World War II. Some of the most famous helicopters are the Focke Wulf Fw 6-1, Sikorsky R 4, Bell Product 47tt along with Mil Mi-1.
Afterward, most those aircraft models developed and have been followed closely with their bigger variants. A few of those famous helicopters from the 60 S were the Bell AH-1 Cobra, Boeing CH47 Chinook, Mil Mi-24″Hind”, Black Hawk and also many more. The principal aim of most of those helicopters was to help you to carry large loads, along with military troops and also to carry out properly in battlefields.
Now, helicopters are mostly used for emergency aid and medical evacuation, but also take part in some military functions around the globe. k6yoprvz7f.