54 DICTIONARY OF AVIATION
whole amount of resistance to the translatory motion of an aerofeil may be concentrated with the same effect as when distributed; the point at which the center of thrust or of effort must be located, in order that a flymg^machine be in equilibrium.
center of thrust, the center or point at which the whole amount of propulsiv thrust or effort of one or more pro- pellers may be applied with the same effect as when distributed ; the point at which a flyingsmachine would have to be supported in order to remain in equilibrium when the propellers were in action; the center of effort.
centric 'sentric adj. having the center of resistance coinci- dent with the line of flight : opposed to acentric : as, a
- centic aerodone.
channel-flying 't$senl,f^ai-ir) n. the action of flying across a channel of water, as the English Channel, in a machine.
charliere ,$azli'e:z n. [also spelt Charliere, charliere] a hydrogen balloon.
chart t$a:zt n. a map or draft, as of the currents of the at- mosfere.
meteorological chart, a chart or map of meteorological fenemena; a wether^map.
thermal chart, a chart or map showing thermal con- ditions, or the temperature of the air, land, or water, as by isothermal lines.
chassis '$aesis, '$a:-si, ,$ae'sri n. [ploral chassis} the central or essential frame of an aeroplane or other flying^machine, to which the motor, rudders, propellers, seats, wheels, etc., are attacht; the under^stjucture of an aeroplane.
chassis-wheel '$aesis,wiil n. one of the wheels attacht to the under part of the . chassis of a flying^machine, consti- tuting a part of the running-gear or landing^apparatus. compare skidiwheel.
chemise $i'miiz n. a covering of unvarnisht silk enveloping a balloon in place of the ordinary net.
chiroptera ,kai'zept9-z9 n. pi. the wing^handed creatures, or bats.
chord ko:zd n. the straight line joining the ends of the arc of a circle or other curv.
chute $uut n. a slide or shoot; also, a rapid downward dash or rush of an airship : as, a disastrous *chute.
cigar-shaped si'ga:z,$eept adj. having the elongated shape or form of a cigar, often somewhat pointed at one or both ends; spindle-shaped, fusiform.
ciliuin 'siH-3m n. [ploral cilia"} a hair?Hke process en the barbule of a bird's f ether; a barbicej.
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