A heavier than air machine supported by one or more fixed planes.
The science of aerostation, or of buoyancy caused by displacement, ballooning.
The science of lighter than air or gas-born machines.
The outer edge or tip of a plane, usually adjustable, used to balance or stabilize.
Commonly used to denote both heavier and lighter than air machines; correctly a dirigible balloon.
The angle of the plane with the line of travel.
In the case of planes, the extent of surface measured on both the upper and lower sides. An area of one square foot comprises the actual surface of two square feet.
The relation of a surface crossing the direction of flight with that paralleling the line of flight.
Stability secured by fins, the angle of the planes and similar devices.
One engaged in aviation.