The equation for calculating helicopter lift is Lift = 1/2 x Air Density x Blade Area x Coefficient of Lift x Velocity^2. This equation takes into account the air density, the size of the helicopter blades, the coefficient of lift, and the velocity of the helicopter.
Torque is a measure of the force that causes an object to rotate around an axis. In a helicopter, torque is generated by the rotation of the blades. This torque is counteracted by the tail rotor, which keeps the helicopter from spinning. The amount of torque produced by the blades affects the amount of lift the helicopter can generate.
RPMs, or revolutions per minute, refer to the speed at which the helicopter blades rotate. The higher the RPM, the faster the blades are rotating, and the more lift the helicopter can generate. However, there is a limit to how fast the blades can rotate before they become unstable, so pilots must carefully control the RPMs to maintain stability and control of the helicopter.
Air density is a measure of how much air is present in a given volume. In general, the higher the air density, the more lift a helicopter can generate. This is because the blades are able to push against more air molecules, creating more lift. However, air density can be affected by factors such as altitude and temperature, so pilots must take these into consideration when calculating lift.
The coefficient of lift is a measure of how efficiently a helicopter's blades are able to generate lift. It takes into account the shape and angle of the blades, as well as the airfoil design. A higher coefficient of lift means the blades are able to generate more lift with less effort, resulting in a more efficient and effective helicopter lift.