the Aviation Dictionary

navigable airspace . negative feedback
navigable airspace - Airspace at and above the needle valve - A tapered
minimum flight altitudes prescribed in the FARs end fluid control needle
including airspace needed for safe takeoff and landing. valve that fits into a seat or
recess to control or restrict
navigate - To move between sites on the Internet. Often
a flow of fluid through an
done by means of links or connections between sites.
orifice.
navigation lights - Lights on an aircraft consisting of a
negative - 1. A condition in
red light on the left wing, a green light on the right
which there is an excess of
wing, and a white light on the tail. FARs require that
electrons. 2. An accepted
these lights be displayed in flight during the hours of
name for the terminal of a
darkness.
battery or power source from which the electrons flow.
navigational aid (NAVAID)- Any visual or electronic 3. During communications, this indicates: "No,"
device, airborne or on the surface, that provides point- "Permission not granted," or "That is not correct."
to-point guidance information, or data, to
negative acceleration - Deceleration; slowing down.
aircraft in flight. - NAVAIDs include VORs, ILSs, and
DMEs. negative angle of
attack - A flight
NBCAP (National Beacon Code Allocation Plan)
condition where the
airspace - Airspace over United States territory
angle of attack
located within the North American continent between
formed between the relative wind and the chord line of
Canada and Mexico, including adjacent territorial
the airfoil is formed with the relative wind being the
waters outward to about boundaries of oceanic control
top leg in relation to the chord line and the so-called
areas (CTA)/Flight Information Regions (FIR).
top surface of the aircraft. An aircraft in inverted, level
N-channel field effect transistor (FET)- A device flight would have a negative angle of attack.
with a conducting channel of N-type material that is on
negative battery terminal - The terminal of a battery
a P-type substrate. It can conduct in either direction,
from which the electrons leave and enter the circuit.
thus it can Dass AC. One end of the channel is called a
"drain" and the other a "source." These are brought out negative buoyancy - The tendency of an object, when
to pins for connection into an external circuit. A third placed in a fluid, to sink because it is heavier than the
connection is to the "gate." The gate can be P-type fluid it displaces.
material. When the gate is made negative in respect to
negative condition - One in which there is an excess of
the channel, a depletion area is formed that reduces the
electrons.
channel current and allows control of it. The input
impedance of any FET is very high.
negative contact - Used by pilots to inform ATC one of
two things. Either that previously issued traffic is not in
neck - 1. A portion of a fastener's body near the head
sight or that they were unable to contact ATC on a
that performs a definite function such as preventing
particular frequency. The first instance might be
rotation, etc. 2. A reduced diameter of a portion of a
followed by the pilot's request for the controller to
fastener's shank required for design or manufacturing
provide assistance in avoiding the traffic.
reasons.
negative dihedral - A downward inclination of a wing
needle and ball indicator - A flight instrument
or other surface. It is the downward angle that is
consisting of a rate gyro that indicates the rate of yaw
formed between the wings and the lateral axis of the
and a curved glass clinometer that indicates the
airplane.
relationshiv between gravity and centrifuna1 force. It
indicates the relationship bktween angle if bank and negative electrical charge - An unbalanced electrical
rate of yaw. Also referred to as a turn and slip condition caused by an atom having more electrons
indicator.
than protons.
needle bearings - An anti-friction bearing made of
hardened steel. The bearing consists of a series of small
diameter rollers that ride between two hardened and
polished steel races. One race is pressed into the
housing, and the other race is pressed onto the rotating
shaft.
negative electrical condition - A condition in which
there are more negative charges than there are positive
charges.
negative electrical resistance - A decrease in current
through a device when there is an increase in voltage.
negative feedback - Information or a signal that is fed
back into a circuit or device that tends to cause a
decrease in the output.
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