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Helicopters are very different from planes. They're smaller than planes and have a rotor on top, they kind of look like really big dragon flies. They are used to transport things that would be too little for a plane and too much for a ground transportation vehicle and are used today for many other things and jobs. They are also able to fly and go to places planes can't go.

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We used card board, hot glue, plastic water bottles, and pop sickle sticks to build something like the model shown in the video.

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MAKE A HELICOPTER FROM CARDBOARD DIY AIRCRAFT

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When the helicopter is hovering (without any cables) the power being used is a function of the Kinetic energy change in the air.

But mechanical energy is the energy the helicopter uses to fly, it generates energy through the rotors which causes them to rotate.

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The main forces acting on a helicopter is gravity pulling it down and the thrust from the main rotor pushing it up.

And the four forces of flight: weight, lift, thrust, and drag.

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Helicopters can fly backwards, forwards, and sideways by tilting the swash plate that is controlled by the cyclic (which can be found between the pilots legs or seats) which changes pitch of the blades. They also stand still in the air by balancing the external forces, with no horizontal forces there is no drag or horizontal thrust.

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Helicopters fly at a cruising speed less than 184 mph, with their max speed being

250 mph.

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the main body of the helicopter is built in forged, extruded sheet aluminum alloys held together by steel, titanium, and aluminum fasteners.

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Helicopters soon developed an autopilot system in 1912. Early helicopters had custom built engines or rotary designed for Airplanes, but were soon replaced by more powerful automobile engines and radial engines.

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Igor Sikorsky, Paul Cornu, and

Arthur M. Young invented the first helicopter.But the french were the first to use the helicopter in the Algerian War in 1954-1962. The first helicopter was originally flown on Nov. 13th, 1907 at Ecole Coquainivillers. As time went on, an inventor of the name Herri Giffard built the first powered helicopter consisting of a steam powered engine that turned large screw-like propellers.

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After world war 2, helicopters were used in everyday careers like firefighters, police, agriculture, medical evacuation, or carrying mail and passengers. They provide better transportation of materials than other vehicles like cars or planes, unlike planes, helicopters can fly almost anywhere because they're so much smaller than planes. Helicopters are also used to help us discover, produce, and preserve natural resources.