first helis had wooden rotor blades and heavy steel/ wooden frames. obviously this didn't do the trick so now we got composite blades, aluminum skids, monocoque or semi monocoque or truss style construction
Originally to take off and land where there were no runways.
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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
By chicken wings
Made in America - 2003 Sikorsky Helicopters - 1.10 was released on: USA: 2004
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.