Leonardo da vinci had drawings of a helicopter but it took Igor Sikorsky to build one that worked. They use rotor blades to create lift.
http://www.explainthatstuff.com/helicopter.html
They fly helicopters.
You can fly helicopters.
They fly in California.
There are many different helicopters. Most small civilian helicopters may fly for about an hour, but large passenger or military helicopters can fly for 6 hours or more.
No
so we can fly
Helicopters can fly directly up or down.
Yes, there are helicopters available.
Some experimental helicopters can fly as fast as 300 mph. However most helicopters in service fly less than 200 mph.
to fly ?
NO
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