Absolute Altitude correct answers The actual distance an object is above the ground.
Absolute Pressure correct answers Pressure measured from the reference of zero pressure, or a vacuum.
Acceleration correct answers Force involved in overcoming inertia; may be defined as a change in velocity ...
ASTB-E || A Verified A+ Pass.
Absolute Altitude correct answers The actual distance an object is above the ground.
Absolute Pressure correct answers Pressure measured from the reference of zero pressure, or a
vacuum.
Acceleration correct answers Force involved in overcoming inertia; may be defined as a change
in velocity per unit of time
Accelerometer correct answers A part of an inertial navigation system (INS) that accurately
measures the force of acceleration in one direction.
Adjustable-pitch propeller correct answers A propeller with blades whose pitch can be adjusted
on the ground with the engine not running, but which cannot be adjusted in flight. Also referred
to as a ground adjustable propeller. Sometimes also used to refer to constant-speed propellers
that are adjustable in flight.
Advancing blade correct answers A rotor blade that experiences an increase in relative wind
because of airspeed.
Adverse Yaw correct answers A condition of flight in which the nose of the airplane tends to
yaw toward the outside of the turn. This is caused by the higher induced drag on the outside
wing, which is also producing more lift. Induced drag is a byproduct of the lift associated with
the outside wing.
Ailerons correct answers Primary flight control surfaces mounted on the trailing edge of an
airplane wing, near the tip. Ailerons control roll about the longitudinal axis.
air density correct answers The density of the air in terms of mass per unit volume. Dense air has
more molecules per unit volume than less dense air. The density of air decreases with altitude
above the surface of the earth and with increasing temperature.
Airfoil correct answers Any surface, such as a wing, which provides aerodynamic force when it
interacts with a moving stream of air.
Airspeed correct answers Rate of the aircraft's progress through the air.
Airspeed Indicator correct answers A differential pressure gauge that measures the dynamic
pressure of the air through which the aircraft is flying. Displays the craft's airspeed, typically in
knots, to the pilot.
Altimeter correct answers An instrument that indicates flight altitude by sensing pressure
changes and displaying altitude in feet or meters
, Ambient Pressure correct answers The air pressure in the area immediately surrounding the
aircraft
Ambient Temperature correct answers The temperature of the air immediately surrounding the
aircraft.
Angle of Attack correct answers The angle formed between the wing chord line and the relative
wind.
Angle of Incidence correct answers For an airplane, the angle formed by the chord line of the
wing and a line parallel to the longitudinal axis of the airplane. For a helicopter, it is between the
blade chord line and the plan of rotation of the rotor system. In the absence of induced flow
and/or aircraft airspeed, angle of attack and incidence are the same.
Antitorque pedal correct answers The pedal used to control the pitch of the tail rotor or air
diffuser in a NOTAR® system
Approach lighting system (ALS) correct answers Provides lights that will penetrate the
atmosphere far enough from touchdown to give directional, distance, and glidepath information
for safe transition from instrument to visual flight.
Articulated Rotor correct answers A rotor system in which each of the blades is connected to the
rotor hub in such a way that it is free to change its pitch angle, and move up and down and fore
and aft in its plane of rotation
Asymmetric Thrust correct answers Also known as P-factor. A tendency for an aircraft to yaw to
the left due to the descending propeller blade on the right producing more thrust than the
ascending blade on the left. This occurs when the aircraft's longitudinal axis is in a climbing
attitude in relation to the relative wind. The P-factor would be to the right if the aircraft had a
counterclockwise rotating propeller.
Altitude Indicator correct answers An instrument that reflects the airplane's attitude in relation to
the horizon
Autopilot correct answers An automatic flight control system which keeps an aircraft in level
flight or on a set course. Automatic pilots can be directed by the pilot, or they may be coupled to
a radio navigation signal.
Autorotation correct answers The condition of helicopter flight during which the main rotor is
driven only by aerodynamic forces, with no power from the engine.
Axes of an aircraft correct answers Three imaginary lines that pass through an aircraft's center of
gravity. The axes can be considered as imaginary axles around which the aircraft rotates. The
three axes pass through the center of gravity at 90° angles to each other. The axis from nose to
tail is the longitudinal axis (pitch), the axis that passes from wingtip to wingtip is the lateral axis
(roll), and the axis that passes vertically through the center of gravity is the vertical axis (yaw).
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