The blades actually have a "pitch" control... As the blades spin, the amount of pitch can be increased to give the helicopter more lift.. The pilot can also adjust the amount the entire rotor to make the copter move forward or backwards... Combine an increase of rotor speed and an increase in blade pitch and the copter takes off... Airplane kinds of works the same way...increase the "flaps" and increase the speed of the plane , then you're airborne!
The tail rotor is used to keep the body of the helicopter stable as the main rotor spins, otherwise the body would spin in the same direction as the blades.
The tail rotor is used to keep the body of the helicopter stable as the main rotor spins, otherwise the body would spin in the same direction as the blades.

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