Helicopter Forces: What Force Keeps Helicopter Aloft?

[mathewings]

In a free-body diagram of a helicopter carrying a suspended object, what force exists to keep the helicopter aloft? Is there a normal force from the rotors? Any help would be appreciated.

 

[Stevedye56]

Hint: What is the purpose of the rotors? What force to they provide?

 

[indoforce]

while the rotors rotate, they apply a force on the air. What does an object do to you when you apply a force on it?

 

[Stevedye56]

If blades push air then...

(Newton's Third Law)