Angle of Incidence, Maximum--The greatest angle of incidence at
which, for a given power, surface (including detrimental surface),
and weight, horizontal flight can be maintained.
Angle of Incidence, Minimum--The smallest angle of incidence at
which, for a given power, surface (including detrimental surface),
and weight, horizontal flight can be maintained.
Angle of Incidence, Best Climbing--That angle of incidence at which
an aeroplane ascends quickest. An angle approximately halfway
between the maximum and optimum angles.
Angle of Incidence, Optimum--The angle of incidence at which the
lift-drift ratio is the highest.
Angle, Gliding--The angle between the horizontal and the path along
which an aeroplane at normal flying speed, but not under engine
power, descends in still air.
Angle, Dihedral--The angle between two planes.
Angle, Lateral Dihedral--The lifting surface of an aeroplane is said to
be at a lateral dihedral angle when it is inclined upward towards
its wing-tips.
Angle, Longitudinal Dihedral--The main surface and tail surface are
said to be at a longitudinal dihedral angle when the projections
of their neutral lift lines meet and produce an angle above them.
Angle, Rigger's Longitudinal Dihedral--Ditto, but substituting
``chords'' for ``neutral life lines.''
Angle, Pitch--The angle at any given point of a propeller, at which
the blade is inclined to the direction of motion when the propeller
is revolving but the aeroplane stationary.
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