the Aviation Dictionary

single-engine service ceiling - The maximum density
altitude at which the single-engine best rate-of-climb
airspeed (VYSE) produces a 50 f.p.m. rate of climb. The
ability to climb 50 f.p.m. in calm air is necessary
simply to maintain level flight for long periods in
turbulent air. This ceiling assumes the airplane is at
maximum gross weight in the clean configuration, the
critical engine (if appropriate) is inoperative, and the
propeller is feathered. In comparison,-the multi-engine
service ceiling is the density altitude at which the best
rate-of-climb airspeed (VY) will produce a 100 f.p.m.
rate of climb at maximum gross weight in the clean
configuration.
single-face repair - A repair to a bonded structure in
which the damage extends through one face sheet and
into the core material.
single-loop rib-stitching - A method of attaching fabric
covering to the ribs of an aircraft using
-
only
.
one loop
of ribstitch cord per stitch.
single-piloted aircraft - A military turbojet aircraft
possessing one set of flight controls, tandem cockpits,
or two sets of flight controls but operated by one pilot.
C-onsidered single-piloted by ATC when determining
the appropriate air traffic service to be applied.
single-point fueling - A method of fueling the aircraft
from a single point. It consists of a pressure fueling
hose and a panel of controls and gauges that permit one
person to load or unload any of the fuel tanks of an
aircraft. The panel has valves connecting the various
tanks to the main heling manifold. Fuel flows to each
tank until the tank has reached the desired level. Also
referred to as pressure fueling.
single-point grounding - A method of electrically
grounding a circuit by connecting all of the ground
wires to a single point.
single-servo brakes - Brakes that use the momentum of
the aircraft to wedge the lining against the drum and
assist in braking when the aircraft is rolling forward.
single-sideband - A radio transmission in which only
one of the sidebands in a signal is used.
single-spool compressor - An axial flow compressor
with a single rotating mass.
single-spool turbine engine -A jet engine that has only
one turbine section connected to the compressor
section. Twin-spool turbines have two sections of each,
operating at different speeds.
single-throw switch - In electricity, a switch that has
two positions, ON and OFF. Can have multiple poles to
turn ON and OFF multiple circuits simultaneously.
sintered material - A heated material that has become a
coherent mass without melting. Used as an alternative
to casting for small parts.
Aircraft Technical Book Company
P.O. Box 270
Tabernash, CO 80478
http:llwww.ACTechbooks.com
single-engine service ceiling . skills and procedures
sintered metal - A porous material made by fusing
powdered metal under heat and pressure.
sinusoidal curve - In mathematics, a curve with angle
degrees along the horizontal axis and sines of the
angles along the vertical axis. This curve generally
illustrates the varying output voltage values of an AC
generator as it turns through 360".
siphon - A device that moves liquid from one container
to a lower point. It consists of a flex tube in the liquid
and a suction device to start the flow of liquid. Gravity
and atmospheric pressure on the surface of the liquid
carry the liquid from the container to a point below the
container.
siphon tube - A tube installed in a C02 fire extinguisher
cylinder assuring that C02 directed to the discharge
nozzle remains in its liquid state.
sites - Internet addresses that provide information and
often are linked to other similar sites.
Sitka spruce - A tall spruce tree that has needle-shaped
leaves, drooping cones, and berry-like fruit. In the
selection of wood for aircraft repairs, spruce is
considered the standard to which other woods are
compared.
situational awareness - The accurate perception and
understanding of all the factors and conditions within
the four fundamental risk elements that affect safety
before, during, and after the flight.
suing - Material used in the manufacture of some
fabrics to stiffen the yarn for ease of weaving. Aircraft
fabric should not contain sizing.
suing up a situation - A colloquial term used to denote
the process of analyzing a situation and deciding what
should be done.
sketch - A simple drawing made without the use of
drafting instruments. It usually shows a minimum of
detail and lacks precision.
ski plane - An airplane whose wheels have been
replaced with skis for operation in snow or ice.
skid - In a skid, the rate of turn is too great for the angle
of bank, and the ball moves to the outside of the turn.
skid fin - A longitudinal vertical airfoil usually placed
above the upper wing of a biplane to increase its lateral
stability.
skid shoes - Plates attached to the bottom of a helicopter
skid-type landing gear to protect the skid.
skills and procedures - The procedural, psychomotor,
and perceptual skills used to control a specific aircraft
or its systems. They are the stick and rudder or
airmanship abilities that are gained through
conventional training, are perfected, and become
almost automatic through experience.