stalling speed /st.l.. spid/ noun
the speed at which the angle of attack is such that lift over the wing surface breaks down
COMMENT: Traditionally, an aircraft can stall at any airspeed, providing the angle of attack is great enough. Stalling speed is often used to refer to the speed below which the aircraft cannot remain airborne.
stall warning system /st.l w.n.. s.st.m/ noun a system to warn the pilot that the aircraft is about to stall
standard 218
standard /stnd.d/ noun some-thing, e.g. a quality or measure, that is officially recognised as an example that others must conform with . Water is the standard for determining relative den-sity. . a high standard of skill a high level of skill . adjective normal, offi-cially or generally accepted . standard procedure normal procedure
standard atmosphere /stnd.d
tm.sf../ noun a unit of pressure defined as the pressure that will support a 760 mm column of mercury at 0°C at sea level, equal to 1.01325 x 105 new-tons per square metre
standard instrument departure
/stnd.n .nstrυm.nt d.pɑt../
noun a published navigational chart showing the route an aircraft must take as it takes off and climbs away from an airport. Abbreviation SID
standard parallels /stnd.d pr.lelz/ plural noun (in a conical pro-jection) the parallels of latitude where the cone cuts the surface
standard pressure setting
/stnd.d pre.. set../ noun 1013.25
millibars. Abbreviation SPS standard rate turn /stnd.d re.t tn/ noun a turn made at a precise number of compass degrees per second
COMMENT: Rate 1 turn = 180 ° in 1 minute, Rate 2 turn = 360 ° in 1 minute, Rate 3 turn = 540 ° in 1 minute, Rate 4 turn = 720 ° in 1 minute. Standard rate turns are made using particular angles of bank for specific airspeeds and are used while flying under Instrument Flight Rules (IFR). The pilot can make accurate turns to given headings by banking at the standard rate and timing the turn.
standard time /stnd.d ta.m/
noun a universally adopted time for all countries based on zone time
standby /stndba./ adjective sec-
ondary, able to be used as a back-up .
Some aircraft use a ram air turbine that can be very useful as a standby power source in the event of failure of a com-plete main AC (alternating current) generating system.
standby ticket /stndba. t.k.t/
noun a cheaper air ticket bought just
before departure time . There are no standby tickets to Montreal.
standing agreement /stnd.. . rim.nt/ noun an agreement between controlling units in different flight information regions to allow the trans-fer of control from one sector to the next without individual coordination, pro-vided agreed parameters are met
standing wave /stnd.. we.v/
noun the motion of air downwind of a steep hill or mountain in which the high and low points of the wave do not move
STAR abbreviation standard arrival route
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