Recent content by Androo

Hey thanks for the reply, I am not talking about lift so much as he is telling me all lift, pressure, or change in force is caused by a change in density which I find impossible.

Hello all, I have been arguing about this for a few days. My friend is telling me that a helicopter flies in the air because there is a difference in density on top of the propeller and below the propeller.The air on top of the helicopter has less density and the bottom has more density. This...