Is there any relationship between Helicopter rotor propulsion and buoyancy?
The forces that make a helicopter lift is the shape of its rotor blades. The tops are curved and the bottoms are flat, causing a venturi effect as the blades slice through the air, where the air moving over the top of the blades moves faster than the air moving underneath, which causes lift. Like when you stick your hand out of a car traveling on the freeway and you change your pitch angle to make the hand go up or down. Buoyancy is the difference in the displacement of the liquid body by the object put in it. Steel ships displace more water than their weight, so they float, whereas a piece of steel, by itself, definitely does not float.
