By chicken wings
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it is a old fashion way of traveling on air before they made planes and helicopters.
According to NASA, future helicopters may be probably made of shape-changing materials.
Heinkel made the first for Nazi Germany, but now Boeing and Sikorsky are well-known companies for building helicopters
nobody knows
dura alminium
Made in America - 2003 Sikorsky Helicopters - 1.10 was released on: USA: 2004
There were helicopters in the good old days. They were more advanced than what we have today, they were 10x bigger they had about 200 seats
Helicopters are made with sophisticated specialized engines and heavy materials which is fueled with special gas. They are also made of steel which makes it really heay.
Made in America - 2003 Sikorsky Helicopters 1-10 was released on: USA: 2004
There have been hundreds of helicopters made in the US
Because it made transport easier.