--The advancing transverse section of an aeroplane.
Aeroplane.--A flying machine of the glider pattern,
used in contra-distinction to a dirigible balloon.
Aeronaut.--A person who travels in the air.
Aerostat.--A machine sustaining weight in the air. A
balloon is an aerostat.
Aerostatic.--Pertaining to suspension in the air; the
art of aerial navigation.
Ailerons.--Small stabilizing planes attached to the main
planes to assist in preserving equilibrium.
Angle of Incidence.--Angle formed by making comparison
with a perpendicular line or body.
Angle of Inclination.--Angle at which a flying machine
rises. This angle, like that of incidence, is obtained
by comparison with an upright, or perpendicular line.
Auxiliary Planes.--Minor plane surfaces, used in conjunction
with the main planes for stabilizing purposes.
Biplane.--A flying-machine of the glider type with two
surface planes.
Blade Twist.--The angle of twist or curvature on a
propeller blade.
Cambered.--Curve or arch in plane, or wing from port
to starboard.
Chassis.--The under framework of a flying machine; the
framework of the lower plane.
Control.--System by which the rudders and stabilizing
planes are manipulated.
Dihedral.--Having two sides and set at an angle, like
dihedral planes, or dihedral propeller blades.
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