belt-driven generator /belt dr.v(.)n den.re.t./ noun a genera-tor whose pulley is turned by a belt attached to an engine-driven pulley
bend /bend/ noun a curve . verb to curve from a straight shape (NOTE: bending – bent) . to bend down-wards to curve down from a horizontal position . to bend upwards to curve up from a horizontal position . The wings support the weight of the aircraft and they bend upwards in flight.
bending load /bend.. l.υd/ noun a
load that causes a structure to bend
Bernoulli’s principle /bnuliz
pr.ns.p(.)l/ noun . lift beware /b.we./ verb to be careful or to watch out for . Beware of carburettor icing. . Beware of other aircraft in the circuit.
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beyond /b.j.nd/ preposition further away than . The radio horizon extends beyond the visible horizon. . it is beyond his understanding he cannot understand it at all, it is too difficult for him to understand
bi-/ba./ prefix 1. two 2. twice biannual /ba.nju.l/ adjective hap-
pening two times a year . biannual inspection an inspection done twice every year
bill /b.l/ noun US same as note noun 4 bimetallic /ba.metl.k/ adjective
made of two metals
bimetallic strip /ba.metl.k
str.p/ noun a strip made of two sepa-rate metals with different rates of expansion, joined together side by side so that when the strip is heated, it bends and makes, or breaks, electrical contact
. Circuit breakers use a bimetallic strip as the sensing element.
binary /ba.n.ri/ adjective referring to a number system used in computers that only uses the digits 0 and 1 . Logic gates work with binary data. . Comput-ers only process binary information.
biplane /ba.ple.n/, bi-plane noun an
old aeroplane design with two pairs of wings, one above the other . Most of the aircraft used in the 1914–18 war were biplanes.
bird strike /bd stra.k/ noun a col-lision between a bird or birds and an air-craft that is flying
black box /blk b.ks/ noun same as flight data recorder (NOTE: It is often called the black box, although it is not black.)
blade /ble.d/ noun a flattened part of a propeller or rotor . blade tip the end of the blade furthest from the centre of rotation . turbine blade a flat part in a turbine, which has an aerodynamic effect on the air
blade angle /ble.d .(.)l/ noun
the angle between the blade axis and the axis of rotation . With a variable pitch propeller, the blade angle may be changed in flight.
blade slip /ble.d sl.p/ noun a loss of propulsive power from a propeller caused by the difference between geo-metric and effective pitch
blade twist /ble.d tw.st/ noun 1. a
reduction in propeller blade angle from root to tip 2. the unwanted variation in propeller blade pitch from root to tip caused by aerodynamic loads
blank /bl.k/ adjective 1. with noth-ing written, printed or drawn on it . a blank sheet of paper . a blank form a form without the details filled in 2. (of a TV, computer or video screen) with nothing appearing on it . When he returned to his computer, the screen was blank.
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