the Aviation Dictionary

storm detection radar. streamlined
can be stored under specified temperature conditions
and remain suitable for use. The storage life should be
printed on the label. Also referred to as shelf life.
storm detection radar - A radar optimized to show
returns of precipitation rather than clouds as in a
normal weather radar.
straight mineral oil - Oil, such as petroleum, derived
from a mineral source as opposed to oils derived from
plants and animals. Straight mineral oil would have no
additives. Often used during break-in of an engine.
straight peen hammer - A metal beading hammer with
one flat face and one face with a vertical edge.
straight roller bearings - Roller bearings used where
the bearing is subjected to radial loads only.
straight shank drill - A twist drill with a straight shank,
distinguishable from a twist drill with a tapered shank.
straightedge - Wood, metal, or plastic having a
perfectly straight edge used in drawing straight lines, or
to check for the straightness of a piece of material.
strain gauge - An extremely tiny conductor bonded to
the surface of a component on which strain is to be
measured. When the surface stretches the cross section
of the strain gauge becomes smaller and its resistance
increases. The strain gauge is extremely sensitive and
measures the change.
strain hardening - The increase in strength and
hardness of a metal by work hardening or cold
working. Strain hardening is normally done after a
piece of material has been heat treated. If an aluminum
alloy is not heat-treatable, strain hardening is the only
way it can be hardened.
strainer - A very fine mesh screen located in the fuel
system and used to remove impurities.
strand - Normally, an untwisted bundle or assembly of
continuous filaments used as a unit. Sometimes a single
fiber or filament is referred to as a strand.
stranded conductor - An electrical conductor made up
of many strands of wire covered with an insulating
material.
straight-in approach-IFR - An instrument approach stranded wire - Electrical wire made up of many
wherein final approach is begun without first having smaller wire strands.
.. -
executed a procedure turn, not necessarily completed
strap pack - A tension-torsion system using sheet steel
with a straight-in landing or made to straight-in landing
lamination to carry the loads of the rotor blades to the
minimums.
head. Used by
.
Hughes Helicopters.
-
straight-in - into the traffic strategic planning - planning whereby solutions are
pattern by interception of the extended runway
sought to resolve potential conflicts.
centerline (final approach course) without executing
any other portion ofihe traffic pattern.
stratification - Formed in layers.
straight-in landing - A landing made on a runway
aligned within 301 of the final approach course
following completion of an instrument approach.
straight-in landing minimums - A statement of MDA
and visibility, or DH and visibility, required for
straight-in landing on a specified runway.
stratiform - Descriptive of clouds of extensive
horizontal development, as contrasted to vertically
developed cumuliform clouds; characteristic of stable
air.
stratiform cloudsClouds formed in layers.
stratocumulus - Stratified cumulus consisting of low
straight-in minimums - See straight-in landing gray clouds, which are formed in layers, and that often
minimums.
cover the whole sky especially in winter.
straight-polarity arc welding - Electric arc welding
where the electrode is connected to the negative
terminal of the power supply.
straight-run gasoline - Gasoline that is refined from
crude oil using the fractional distillation process to
produce straight-run gasoline' In this method? the crude
oil is heated at atmospheric pressure in a heating
container. The various hydrocarbon liquids in the crude
oil vavorize fist. followed by those of higher - boiling -
points. Straight-run gasoline has an octane rating of
approximately 70.
strain - 1. Deformation in a material caused by stress. 2.
The process of exerting a force beyond the normal
physical capacity of the material.
stratopause - The top stratosphere, approximately
160,000 feet MSL.
stratosphere - The first layer above the troposphere
extending to a height of approximately 160,000 feet,
with a composition much like the troposphere.
stratus - Low gray uniform clouds that generally extend
over a large area at altitudes of 2000 to 7000 feet (600
to 2100 meters).
streamline flow - A fluid flow without turbulence. All
lines of flow are in straight lines.
streamlined - Having a shape or contour that presents a
minimum resistance to the air with a minimum of
turbulence.
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