helicopter

A helicopter is a type of rotorcraft in which lift and thrust are supplied by rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward, and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of VTOL (vertical takeoff and landing) aircraft cannot perform. The English word helicopter is adapted from the French word hélicoptère, coined by Gustave Ponton d'Amécourt in 1861, which originates from the Greek helix (ἕλιξ) "helix, spiral, whirl, convolution" and pteron (πτερόν) "wing". English language nicknames for helicopter include "chopper", "copter", "helo", "heli", and "whirlybird". Helicopters were developed and built during the first half-century of flight, with the Focke-Wulf Fw 61 being the first operational helicopter in 1936. Some helicopters reached limited production, but it was not until 1942 that a helicopter designed by Igor Sikorsky reached full-scale production, with 131 aircraft built. Though most earlier designs used more than one main rotor, it is the single main rotor with anti-torque tail rotor configuration that has become the most common helicopter configuration. Tandem rotor helicopters are also in widespread use due to their greater payload capacity. Coaxial helicopters, tiltrotor aircraft, and compound helicopters are all flying today.
helicopters - colorful puzzle-puzzle
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helicopters

Added year ago by andi

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Aircraft carrier - colorful jigsaw puzzle
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Aircraft carrier

Added year ago by andi

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helicopter - helicopter flight over radom
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helicopter

Added year ago by erwinek

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helicopter - road rescue helicopter
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helicopter

Added year ago by Krzysztof

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Helikopter wojskowy - Nowinki na targach w Kielcach
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Helikopter wojskowy

Added over a year ago by Iwona

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Helikoptery na lotnisku - Ciężkie wojskowe maszyny
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Helikoptery na lotnisku

Added over a year ago by Iwona

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Łowcy smoków - Łowcy Smoków Dragon Hunters
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Łowcy smoków

Added over a year ago by Karolina

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Metalowe potwory - Czołg wojskowy postrach na wojnie
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Metalowe potwory

Added over a year ago by Iwona

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helikopter na polu - Fuchs helikopter Schweizer Z269C
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helikopter na polu

Added over a year ago by iwona

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biało-czerwony helikopter - helikopter Enstrom F28 A
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biało-czerwony helikopter

Added over a year ago by iwona

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Śmigłowiec - Lądowanie śmigłowca na parkingu.
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Śmigłowiec

Added over a year ago by Zdzisław Witlewski

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Śmigłowiec - Lądowanie śmigłowca na parkingu.
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Śmigłowiec

Added over a year ago by Zdzisław Witlewski

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Śmigłowiec - Lądowanie śmigłowca przy kopcu.
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Śmigłowiec

Added over a year ago by Zdzisław Witlewski

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