1. Round and Round They Go

2. Helicopter helicopter – a plane that gets its lift from a powered rotor

3. Helicopter a large rotating blade can produce enough lift for flight, just as a fixed-wing airplane can the blades of a helicopter have the same shape in cross section as airplane wings as these blades spin through the air, pressure differences are created (Bernoulli’s Principle) and air is also pushed downward by the blades unlike an airplane, a helicopter can hover in place because they produce their own lift

4. Helicopter as a reaction to the forces produced by the horizontal rotor of the helicopter, the main body of the helicopter spins in the opposite direction as the main rotor to provide stability, most helicopters also have a vertical rotor at the back to counterbalance the reaction force of the rotors

5. Helicopter helicopters with two rotors have them moving in opposite directions to prevent the helicopter body from spinning

6. Autogiro autogiro – an airplane with a rotating blade above it