Relation between lift force and torque produced in propeller used for vertical take-off and landing aircrafts
The relationship of torque produced by the engine and lift force will be the drag of the rotor.  Increase in lift force by increasing rpm or AOA will require a proportional increase in power output from the engine.  Air density also plays a role.
With a common helicopter, torque is counter balanced by increasing or decreasing torque of the tail rotor.