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Made in the 2nd millennium BC
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The word helicopter came from the French language.
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which originates from the Greek "twisted, curved"
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While hovering, the air copressed onto the ground in similar to what an arch uses. Instead of air the arches walls are compressing.
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ARCH used helicopters to medically help people.
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Originated in 1981 for entertainment purpuses.
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For only $35 you can taje a helicopter ride through a bridge.
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The structure uses an arch structure to keep it held up. The roof is formed rounded to keep it from caving in.
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