A rotorcraft comprising: - rotors for obtaining lift at different positions; - a fuselage coupled to the rotors ; - at least three rods that support the fuselage ; - a load sensor attached to each of the at least three rods and configured to detect loads (F1, F2, F3, F4) applied on the at least three rods before a takeoff of the rotorcraft ; and - a control device that is configured to automatically control the rotors so that measured values (Fm) of the loads (F1, F2, F3, F4) detected by the at least one load sensor are brought to targeted values (Ft) of the loads (F1, F2, F3, F4), characterised by : the control device is configured to set the targeted values (Ft) of the loads (F1, F2, F3, F4) before the takeoff of the rotorcraft , automatically control the rotation numbers and pitch angles of the rotors so that the outputs (P1, P2, P3, P4) of the rotors become initial values (Pi), and thereby generate a lift by which the rotorcraft cannot take off by rotating the rotors , performing feedback control that changes at least one of rotation numbers and pitch angles of the rotors so that the measured values of the loads (F1, F2, F3, F4) are brought close to the targeted values (Ft) of the loads (F1, F2, F3, F4), and increasing the outputs (P1, P2, P3, P4) of the rotors so that the rotorcraft takes off when all of the deviation amounts of the measured values (Fm) from the targeted values (Ft) are each within an allowable range. - rotors for obtaining lift at different positions; - a fuselage coupled to the rotors ; - at least three rods that support the fuselage ; - a load sensor attached to each of the at least three rods and configured to detect loads (F1, F2, F3, F4) applied on the at least three rods before a takeoff of the rotorcraft ; and - a control device that is configured to automatically control the rotors so that measured values (Fm) of the loads (F1, F2, F3, F4) detected by the at least one load sensor are brought to targeted values (Ft) of the loads (F1, F2, F3, F4), the control device is configured to set the targeted values (Ft) of the loads (F1, F2, F3, F4) before the takeoff of the rotorcraft , automatically control the rotation numbers and pitch angles of the rotors so that the outputs (P1, P2, P3, P4) of the rotors become initial values (Pi), and thereby generate a lift by which the rotorcraft cannot take off by rotating the rotors , performing feedback control that changes at least one of rotation numbers and pitch angles of the rotors so that the measured values of the loads (F1, F2, F3, F4) are brought close to the targeted values (Ft) of the loads (F1, F2, F3, F4), and increasing the outputs (P1, P2, P3, P4) of the rotors so that the rotorcraft takes off when all of the deviation amounts of the measured values (Fm) from the targeted values (Ft) are each within an allowable range. set the targeted values (Ft) of the loads (F1, F2, F3, F4) before the takeoff of the rotorcraft , automatically control the rotation numbers and pitch angles of the rotors so that the outputs (P1, P2, P3, P4) of the rotors become initial values (Pi), and thereby generate a lift by which the rotorcraft cannot take off by rotating the rotors , performing feedback control that changes at least one of rotation numbers and pitch angles of the rotors so that the measured values of the loads (F1, F2, F3, F4) are brought close to the targeted values (Ft) of the loads (F1, F2, F3, F4), and increasing the outputs (P1, P2, P3, P4) of the rotors so that the rotorcraft takes off when all of the deviation amounts of the measured values (Fm) from the targeted values (Ft) are each within an allowable range. <EOS>