Each blade of the main rotor(s) acts like a wing and generates lift. The angle of the blades can be adjusted to alter the amount of lift generated. This is done using the "collective pitch control", so-called because it collectively controls the pitch or angle of all the blades together. Pulling on the collective lever and at the same time increasing the throttle causes the helicopter to rise.
The blades of the fan of dh Helicopter rotate & create a lots of air pressure ....then the piolt turns dh Helicopter in an angle tht pushes the air pressure downwards and lifts the helicopter upwards
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Each blade of the main rotor(s) acts like a wing and generates lift. The angle of the blades can be adjusted to alter the amount of lift generated. This is done using the "collective pitch control", so-called because it collectively controls the pitch or angle of all the blades together. Pulling on the collective lever and at the same time increasing the throttle causes the helicopter to rise.
The blades of the fan of dh Helicopter rotate & create a lots of air pressure ....then the piolt turns dh Helicopter in an angle tht pushes the air pressure downwards and lifts the helicopter upwards
simp'le big fan push air down . if some thing go down some thing go up so the heli goes up .