the Aviation Dictionary

overshootm ozone
aircraft or partly by aircraft and partly by other forms
of transportation.
oxidation - A chemical action in which a metallic
element is combined with oxygen. Electrons are
removed from the metal in this process.
overshoot - Overshoot is caused by rapid increase in
throttle, which causes the controller to overshoot the
requirement for the engine boost, resulting in combined with another element.
overboost.
overshooting tops - In thunderstorms, very strong
updrafts that penetrate the otherwise smooth top of the
anvil cloud.
oxide - A chemical combination in which oxygen is
oxide film - A layer, coating, or metallic oxide on the
surface of a material.
oxidized - 1. Combined with oxygen. 2. A substance
that causes another to combine with oxygen.
oversize - A question with many possible correct
oxidizing flame - An oxyacetylene welding flame in
answers.
which there is an excess of oxygen -- - passing through the
oversized stud - A stud having a greater diameter than torch. An oxidizing flame can be recognized by its
standard for the portion that is or threaded into sharp-pointed inner-cone and a hissing noise made by
the stud boss. The external diameter and thread pitch the torch.
are the same as original standard stud.
oxyacetylene - Gas welding that uses oxygen and
overspeed - 1. A condition in which an engine has acetylene.
produced more RPM than the manufacturer
oxy-gas welding - Gas welding that uses oxygen and a
recommends. 2. The condition in which the actual
gas such as acetylene.
engine speed is higher than the desired engine speed as
seton the propeller control. oxygen
.-
- One of the basic elements with a symbol of 0
and an atomic weight of 8. In the free gas state, it is
overspeed condition - A condition of the propeller
always O2 because two atoms of oxygen must combine
operating system in which the propeller is operating
to form one molecule of oxygen gas. Oxygen is a
above the RPM for which the governor control is set.
colorless, odorless, tasteless, gaseous chemical element
This causes the propeller blades to be at a lower angle
that makes up about 21% of the Earth's atmosphere. It
than that required for the desired speed.
will not bum but suvvorts combustion and is essential
overspeed governor - A speed-limiting device. to life processes.
Governors regulate speed through the fuel control.
oxygen bottle - Special, high-strength steel cylinder
overspeeding - Exceeding the maximum RPM limits of
the engine. Adjusting pitch stops in the prop governor
allow RPM limits to be set.
overtemperature - 1. A condition in which a device has
reached a temperature above that approved by the
manufacturer. 2. Any exhaust temperature that exceeds
the maximum allowable for a given operating condition
or time limit.
overtemperature warning system - A warning system
that warns the pilot of an overheat condition. If the
temperature rises above a set value in any one section
of the overheat sensing circuit, the sensing device turns
on a cockpit light indicating the location of the
overtemperature.
over-the-top - Above the layer of clouds or other
obscuring phenomena forming the ceiling.
overview - A concise presentation of the objective and
key ideas, supplemented with appropriate visual aids,
to give students a clear picture of what is to come.
overvoltage protector - An electrical circuit protection
device used to protect components from damage
caused by high voltage surges. If the voltage is
excessive, the overvoltage protector opens and protects
the component.
used to store gaseous oxygen under pressure.
oxygen cell corrosion - Corrosion that results from a
deficiency of oxygen in the electrolyte.
oxygen concentration cell corrosion - Corrosion that
forms between the lap joints of metal where moisture
gets trapped.
oxygen manifold - A device for connecting several
oxygen masks into one oxygen supply or several
oxygen sources into a master manifold.
oxygen mask - A small face mask with special
attachments for breathing oxygen.
oxygen plumbing - Tubing and fittings used in the
oxygen system to connect the various components.
oxyhydrogen - Gas welding that uses oxygen and
hydrogen.
ozone -A variety of oxygen that contains three atoms of
oxygen per molecule rather than the usual two. The
major portion of ozone in the atmosphere is formed by
the interaction of oxygen with the sun's rays near the
top of the ozone layer. It is also produced by electrical
discharges (lightning storms). Ozone is important to
living organisms because it filters out most of the sun's
ultraviolet radiation.
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