Helicopters
Dear HIW, How does a helicopter work? How do the propellers drive it forward when it’s spinning?
As the helicopter’s propellers rotate they slice through the air and generate lift. If the rotor disc is parallel to the ground the helicopter will hover, but attached to the rotors is a swash plate that changes the angle of the blades and causes them to tilt, so the vehicle is propelled forwards. A small tail rotor is positioned at the back to prevent the main body from rotating.