L Flashcards
Lag
The delay that occurs before an instrument needle attains
a stable indication.
Land breeze
A coastal breeze flowing from land to sea
caused by temperature differences when the sea surface is
warmer than the adjacent land. The land breeze usually occurs
at night and alternates with the sea breeze that blows in the
opposite direction by day.
Land as soon as possible
Land without delay at the nearest
suitable area, such as an open field, at which a safe approach
and landing is assured.
Land as soon as practical
The landing site and duration of
flight are at the discretion of the pilot. Extended flight beyond
the nearest approved landing area is not recommended.
Land immediately
The urgency of the landing is paramount.
The primary consideration is to ensure the survival of the
occupants. Landing in trees, water, or other unsafe areas
should be considered only as a last resort.
Lateral axis
. An imaginary line passing through the center
of gravity of an airplane and extending across the airplane
from wingtip to wingtip.
Lateral stability (rolling)
The stability about the
longitudinal axis of an aircraft. Rolling stability or the ability
of an airplane to return to level flight due to a disturbance
that causes one of the wings to drop.
Latitude
Measurement north or south of the equator in
degrees, minutes, and seconds. Lines of latitude are also
referred to as parallels.
Lead radial
The radial at which the turn from the DME arc
to the inbound course is started.
Leading edge
The part of an airfoil that meets the airflow first.
Leading edge devices
High lift devices which are found
on the leading edge of the airfoil. The most common types
are fixed slots, movable slats, and leading edge flaps.
Leading-edge flap
A portion of the leading edge of an
airplane wing that folds downward to increase the camber,
lift, and drag of the wing. The leading-edge flaps are
extended for takeoffs and landings to increase the amount of
aerodynamic lift that is produced at any given airspeed
Leans, The.
A physical sensation caused by an abrupt
correction of a banked attitude entered too slowly to
stimulate the motion sensing system in the inner ear. The
abrupt correction can create the illusion of banking in the
opposite direction.
Licensed empty weight
The empty weight that consists
of the airframe, engine(s), unusable fuel, and undrainable
oil plus standard and optional equipment as specified in the
equipment list. Some manufacturers used this term prior to
GAMA standardization.
Lift
A component of the total aerodynamic force on an airfoil
and acts perpendicular to the relative wind.
Limit load factor
Amount of stress, or load factor, that an
aircraft can withstand before structural damage or failure
occurs.
Lines of flux
Invisible lines of magnetic force passing
between the poles of a magnet.
Load factor
r. The ratio of a specified load to the total weight
of the aircraft. The specified load is expressed in terms of
any of the following: aerodynamic forces, inertial forces, or
ground or water reactions.
Loadmeter
A type of ammeter installed between the generator
output and the main bus in an aircraft electrical system.
Local Area Augmentation System (LAAS)
A differential
global positioning system (DGPS) that improves the accuracy
of the system by determining position error from the GPS
satellites, then transmitting the error, or corrective factors,
to the airborne GPS receiver.
Localizer (LOC)
The portion of an ILS that gives left/right
guidance information down the centerline of the instrument
runway for final approach.
Localizer-type directional aid (LDA)
A NAVAID used
for nonprecision instrument approaches with utility and
accuracy comparable to a localizer but which is not a part
of a complete ILS and is not aligned with the runway. Some
LDAs are equipped with a glideslope.
Locator Middle Marker (LMM)
Nondirectional radio
beacon (NDB) compass locator, collocated with a middle
marker (MM).
Locator Outer Marker (LOM)
NDB compass locator,
collocated with an outer marker (OM).
