(27A)[ "Gyroplane" means a rotorcraft whose rotors are not engine-driven, except for initial starting, but are made to rotate by action of the air when the rotorcraft is moving; and whose means of propulsion, consisting usually of conventional propellers, is independent of the rotor system;] [Inserted by Notification No. G.S.R. 1358(E), dated 01.11.2017 (w.e.f. 23.3.1937).]
