i think you are trying to make circuit that can fly like a helicoptor. many factors affect to make that circuit fly. rpm of motor, weight of circuit, diameter of propeller also balancing of circuit is great problem as change in torque of motor or wind can imbalance it. it is difficult to make this type of project. some type of gyro mechanism is required to balance it. balsa is lightest wood. search for rc helicoptor motor rpm to get some idea. rpm can be increased by gear mechanism.