how does the turning rotor make a helicopter move upwards? and talk about auto rotation please?

Question

I am doing my gcse ocr gateway physics controlled assessment. I cant find anything suitable with it involving auto rotation. Any help?

Answer 1

blades angle ...a sort of screw into the air.....

Answer 2

Each of the rotor blades is actually and aerofoil or wing. As the rotor cuts through the air it generates lift which pushes the aircraft up. A fixed wing plane has to have a take-off run to get enough lift.

An auto gyro uses a motor to push the aircraft forward which makes the rotor spin round which in turn generates lift.

Answer 3

See the following for the operation of the collective:



http://science.howstuffworks.com/transport/flight/modern/helicopter5.htm



Autorotation see:



http://en.wikipedia.org/wiki/Autorotation_(helicopter)



Hope this helps,



Newton1Law