I get that the spinny fan like pulls it up but like how does it spin because if I theoretically have a massive fan that spun at extreme speeds will my house fly?
Plus why do helicopters need spinny things when literally every other thing that flies just has wings and an engine. Also if the fan spins why does it spinning pull it up like when it’s on the ground it stays still but when it’s in the sky u can like manoeuvre it 360 like what.
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> but like how does it spin
Helicopters have powerful engines which spin the main rotor as well as the tail rotor. This is one of the main hurdles to getting helicopters to work at all, and what makes them consume more fuel than a traditional airplane.
> if I theoretically have a massive fan that spun at extreme speeds will my house fly?
Yes, that could work in concept. Basically you are just describing a massive helicopter.
> why do helicopters need spinny things when literally every other thing that flies just has wings and an engine.
For a traditional airplane the engine pushes the aircraft through the air and the movement over the airfoil of the wings creates lift to make it fly. With a helicopter the airfoil is the blades of the main rotor and they are moved through the air by its rotation, creating lift that way. One of the main aims of helicopters is to be able to keep the craft relatively stationary so instead of moving the entire vehicle they just move the airfoil.
> if the fan spins why does it spinning pull it up like when it’s on the ground it stays still but when it’s in the sky u can like manoeuvre it 360 like what.
The blades on the main rotor change their orientation or “angle of attack”, allowing the amount of lift they generate to be altered. This can happen with all the blades at once by something called the “collective”, allowing the pilot to adjust overall lift. It also happens mid-rotation by a mechanism called a “swashplate” controlled by the joystick of the pilot, allowing a blade of the rotor to for example produce more lift when it is in the rear and less when at the front. By changing the angle of attack of the airfoils at different points in their rotation the pilot can steer the helicopter around.
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