A. Aircraft defined. The term "aircraft" as used in this Chapter means any contrivance now known or hereafter invented, including balloons, airplanes, hydroplanes, helicopters and other similar or dissimilar vehicles used or designed for navigation of or flight through the air, but excluding parachutes or other contrivances designed and used primarily as safety equipment

B. Aircraft landing field. The term "aircraft landing field" as used in this Chapter means any site used for the landing or take off of any aircraft defined above.

C. Acrobatic flying defined. The term "acrobatic flying as used herein means 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.