The words and phrases contained herein shall have the following meanings ascribed to them unless the context states otherwise:
ACROBATIC FLYING: Any intentional airplane maneuver or stunt not necessary to air navigation, or operation of aircraft in such manner as to endanger human life or safety by the performance of unusual or dangerous maneuvers.
AIRCRAFT: Any aeroplane, airplane, gas bag, flying machine, balloon, any contrivance now known or hereafter invented, used or designed for navigation of or flight in the air, except a parachute or other contrivance used primarily as safety equipment. (Revised Code 1958)