the Aviation Dictionary

line voltage - lithium cell
line voltage - The main power line voltage that operates
a system.
line voltage regulator - The device used to stabilize the
line voltage by sensing and regulating the voltage
demands supplied to a piece of electrical or electronic
equipment.
linear accelerometer - A device that measures
acceleration of a body in a straight line.
linear actuator - An actuator that changes hydraulic or
pneumatic pressure into linear motion.
linear amplification - In electronics, an amplifier in
which the change in output is proportional to the
change in input.
linear control - In electronics, a control device in which
the change in output is proportional to the amount the
control's adjustment is changed.
linear integrated circuit - In electronics, an integrated
circuit (IC) in which the change in output is
proportional to the change in input.
linear movement - A movement or progression in
which the output or result is directly proportional to the
input.
linear operation - The operation in which the output of
a device is directly proportional to its input. If the input
increases by 10 percent, the output will also be
increased by 10 percent.
linear resistance curve - The characteristic illustrated
by a load when any increase or decrease in the voltage
across the load results in a proportional change in the
current through the load.
linen - A fabric made from flax that was a favorite
covering material for truss-type airplanes. In the United
States, it has been almost totally replaced by grade-A
cotton and synthetic fiber.
lines of flux - The lines of magnetic force connecting
the poles of a magnet.
link - 1. A short connecting rod used for transmitting
power and/or force. 2. On the Internet, an identifier
indicating connection with another similarly identified
element. Links are usually identified by a different
color of text, underlining, or button and can be
accessed merely by clicking on them with a mouse.
The mouse pointer also will usually change from an
arrow to a hand when it hovers over a link.
link rod -An articulated rod that connects the pistons in
a radial engine to the master rod. There is one less
articulated rod than there are cylinders in each row of
cylinders in a radial engine - since one piston is attached
ti the master rod.
linseed oil - A solvent used in some aircraft finishes.
Also used to coat the inside of steel tubing to prevent
rusting. Linseed oil is obtained from flaxseed.
liquid -A fluid that assumes the shape of the container
in which it is held.
liquid air -A slightly bluish, transparent liquid that has
been changed into a liquid by lowering its temperature
to -31Z°F (-191" C, 81" Kelvin). It is used chiefly as a
refrigerant.
liquid crystal - A liquid whose reflectivity varies
according to the voltage applied to it.
liquid crystal display - A constantly activated display
that consists of segments of a liquid crystal. Uses very
low current levels, making it more suitable for displays
than light emitting diodes (LED'S).
liquid lock - A condition that occurs in reciprocating
engines that have the cylinders below the crankcase.
Oil leaks past the piston rings and tills the cylinder.
The engine cannot be rotated without damage. Also
referred to as a hydraulic lock.
liquid nitrogen - Nitrogen that has been changed into
its liquid state by lowering its temperature to -195°C
(78" Kelvin) or lower.
liquid oxygen (LOX)- Oxygen that has been changed
into its liquid state by lowering its temperature to -
113°C (160" Kelvin) or lower.
liquid-cooled - A device or machine that is cooled by
the use of liquid.
liquid-cooled engine - A reciprocating engine that uses
a mixture of water and ethylene glycol to remove
excess heat. This mixture flows around the cylinders in
jackets and absorbs the heat created by the combustion
in the cylinders. This heat is released to the outside air
through a radiator.
listening - Hearing your students talk and listening to
what they are saying are two different things.
Instructors can use a variety of techniques or tools to
become better listeners, including do nit interrupt, do
not judge, think before answering, be close enough to
hear, watch nonverbal behavior, be aware of biases,
look for underlying feelings, concentrate, avoid
rehearsing answers while listening, do not insist on the
last word.
liter - A metric unit of volume (1.0567 qt.) used for
gaseous or liquid measurement.
Uthium - An alkaline-metal element with a symbol of Li
and an atomic number of 3. The lightest metallic
element known.
lithium cell - One of a family of chemical cell types
incorporating lithium in one pole.
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