It was in the fifteenth century that Leonardo Da Vinci first put forward the idea that vertical flight (flying straight up into the sky) was possible. But it was in 1940 that Igor Sikorsky, an American, invented the modern helicopter.
Today, helicopters are used as air-taxis, carrying people from one place to another.
Today, helicopters are used as air-taxis, carrying people from one place to another.
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| A Helicopter |
