A helicopter, or chopper, 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.
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First draw a flat circle. This is the rotating rotor blades.
Draw the fuselage with an unclosed oval. And connect the rotor blades to the fuselage.
Draw the tail of the helicopter. The shape is a bit like a lying leg.
Draw a curve like the letter V across the fuselage to separate the cockpit from the body.