Page:Dictionary of aviation.djvu/249

 DICTIONARY OF AVIATION 225

attacht to or intersecting the rear rudder; a rear directiv organ or balancer; a trailer: as, a cellular *tail.

negative tail, a tail, in an aircraft, which is conceivd as acting in a negativ manner, distinguisht from positive tail.

positive tail, a tail, in an aircraft, which is conceivd as acting in a pesitiv manner, distinguisht from negative tail.

4. the neck of the gasbag of a balloon.

5. the part of a streamline body behind the buttock; the posterior extremity of a streamline body.

tail-area 'tee},e:-zi-9 n. the area of the tail of a bird, as at maximum or minimum spred.

tail-boom 'teel,boum n. the boom, spar, or pole which ex- tends rearward behind a flying^machine and constitutes or carries the tail : as, the upper and lower *tail^booms con- verge to a peint.

tail-cord 'teel,ke:zd n. a cerd serving as, or attacht to, the tail of a kite.

tail-covert 'teel,kAv9zt n. one of the covertsfethers of a bird's tail.

tailed teeld adj. [also spelt taild] furnisht with a tail : as, a
 * taild monoplane.

tail-feather 'tee^fectez n. [also spelt tailzf ether] one of the main f ethers of a bird's tail; a rectrjx, a rudder.

tail-length 'teel,lerj9 n. the length of the tail of an aero- done : as, positiv, neutral, or negativ *taiWength.

tail-like 'tee^laik adj. like a tail; resembling a tail in form or position.

tail-piece 'teel,piis n. the piece or part in a flying^machine which occupies the position f, or acts as, a tail; the tail of an airship.

tail-plane 'teel,pteen n. a plane or aerofoil which forms the tail of a glider or flying^machine ; a posterior directiv or- gan or stabilizer.

tail-plumage 'tee^pixm-mids n. the plumage of a bird's tail.

tail-skid 'tee},skid n. a small skid or runner attacht under the tail or hinder extremity of a flyingsmachine in order to keep the tail off the ground or facilitate its motion along the ground, as in landing, compare wingtskid.

tail-steerage 'tee!,sti:-zid3 n. steerage or steering by means of a tail.

tail-wheel 'teel,uml n. a wheel attacht under the tail of a flying^machine to support it, or keep it eff the ground.

tandem 'taendam adv. one behind the other; in single file: as, two aerofoils placed *tandem.

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