the Aviation Dictionary

measuring the height above sea level. The two
principle types are mercury and aneroid.
barometric altimeter . basket weave
hydraulic fluid, unusable fuel, and full engine oil, in
addition to optional and special equipment that has
been installed. (Except aircraft certified under CAR
Part 3, the standard empty weight does not include oil.)
barometric altimeter - An instrument that measures
altitude above mean sea level using an internal aneroid
barometer to compare pressure of the ambient air in
relation to known lapse rates of pressure as altitude
varies with height. Also referred to as a pressure operating fluids, including full engine oil.
altimeter.
barometric pressure - Pressure existing above zero
pressure. Measured in millibars or inches of mercury.
basic empty weight - The weight of the standard
aircraft, operational equipment, unusable he], and full
basic fuel system - The tanks, booster pumps, lines,
selector valves, strainers, engine-driven pumps, and
pressure gauges that make up an aircraft's basic fuel
system.
barometric tendency - The change in barometric
pressure over a set period of time. For example, "The basic ground instructor - A person authorized by the
barometric tendency in the past three hours has been a FAA to provide: ground training in the aeronautical
1 mb rise" Also referred to as pressure tendency. knowledge areas required for issuance of a recreational
pilot certificate, piiate pilot certificate, or associated
barrel - The part of a reciprocating engine cylinder
ratings under Part 61; ground training required for a
made of a steel alloy forging. The inner surface of the
recreational pilot and private pilot flight review; and
barrel is hardened to resist wear of the piston and the
recommendation for a knowledge test required for
piston rings which bear against it during operation. In
issuance of a recreational pilot certificate or private
some instances the barrel will have threads on the
pilot certificate under Part 6 1.
outside surface at one end so that it can be screwed into
the cylinder head.
basic load - The load on a structural member or part in
any condition of static equilibrium of an airplane.
barrel roll - An airplane flight maneuver in which the
When a specific basic load is expressed, the particular
airplane rolls around a distant visual point with a
condition of equilibrium must be indicated in the
constant angular displacement from the point
context.
throughout - the roll.
basic magneto - A high-voltage generating device in a
barriers to effective communication - Things which
reciprocating engine. It is adjusted to give maximum
impede communication, such as lack of common
voltage at the time the points break and ignition occurs.
experience, or confusion between the symbol and the
It must also be synchronized accurately to the firing
symbolized object. Other examples include overuse of
position of the engine.
abstractions and interference.
basic maneuvers - Straight-and-level flight, climbs,
base - 1. The center electrode of a transistor. The signal
descents, and turns. These four maneuvers form the
is normally applied to the base. 2. The electrode
foundation of the development of all piloting skills.
between the emitter and the collector in a bipolar
Each flight maneuver, regardless of its complexity, is
transistor. 3. A bipolar transistor electrode that
composed of combinations of the basic maneuvers.
normally receives the signal. -
basic need - A perception factor that describes a
base leg - A flight path at right angles to the landing
person's ability to maintain and enhance the organized
runway off its approach end. The base leg normally
self.
extends from the downwind leg to the intersection of
the extended runway centerline.
basic radar service - A radar service for VFR aircraft
base line - A line used as a basis for measuring.
that includes safety alerts, traffic advisories and limited
radar vectoring, as well as aircraft sequencing at some
base metal - The metal to which alloying agents are terminal locations.
added.
basic size - The size from which the limits of size are
baseball stitch - A hand stitch similar to that used to derived by the application of allowances and
sew the cover on a baseball. It is used for hand sewing tolerances.
of aircraft fabric.
basic weight - The weight of an aircraft, its power plant,
BASIC (computer)- A programming language used by and all of the fixed equipment. It includes unusable
digital computers. BASIC is an acronym for Beginners fuel and undrainable oil for aircraft not certified under
All-purpose - Symbolic Instruction Code. FAR Part 23 (aircraft certified under FAR Part 23
include full oil as part of empty weight).
basic empty weight (GAMA)- Standard empty weight
(airframe, engines, and all items of operating basket weave -
- -
In composites, a woven reinforcement
equipment that have fixed locations and are where two or more warp threads go over and under two
& A
permanently installed, including fixed ballast, or more filling threads in a repeat pattern. The basket
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