Page:Dictionary of aviation.djvu/72

 48 DICTIONARY OF AVIATION

boundary-circulation / baun-dri-SBzkc.u,lee-$3n n. the

circulation of a fluid along or around a boundary. boundary-surface 'baun-dn,sBzfis w. the surface forming

the boundary between the live stream and the ded#water in

the rear of an advancing aerofoil. bow bao n. [often used in the plural] the front or forward

end of an airship. bowsprit / boo / sp3it n. a large spar or boom which projects

forward from the stem or front of an airship. bow-stick 'boo,stik n. the elastic stick which forms the ,bow

of a bow kite. bow-string 'boo,stirj n. one of the strings, cords, or lines

which is attacht to the bow of a bow kite. box-kite 'boks,kait n. same meaning as box kite, see under

kite. box-kite 'boks,kait adj. of, or consisting of, a box kite, see

under kite.

box-plane 'beks,pz,een n. an aeroplane flying?machine hav- ing planes arranged in bex^like form. brace bzees n. a prep or support; a diagonal compression?

member in the frame of an aerial vehicle. brace-line 'bzees^am n. one of the lines or cords of the

bridle of a kite; a brace. bracing-wire 'bzee-sin/waiz n. a wire used for bracing or

preventing deformation, as in the structure of an aeroplane

flying?machine. brake-rope 'bzeek,zoop n. a rope hanging from a balloon

and used as a brake or to retard the motion of the craft

thru the air. breeze bziiz n. a moderately brisk wind; a movement of the

air not so strong as a gale : as, a stiff *breeze.

fresh breeze, a breeze (numberd 5 in Beaufort's wind?

scale) having a velocity of about 8.8 meters per second. gentle breeze, a breeze (numberd 3 in Beaufort's wind*

scale) having a velocity of about 4.8 meters per second. light breeze, a breeze (numberd 2 in Beaufort's wind?

scale) having a velocity of about 3.1 meters per second. moderate breeze, a breeze (numberd 4 in Beaufort's

wind^scale) having a velocity of about 6.7 meters per sec- ond.

mountain breeze, same meaning as mountaintbreeze. stiff breeze, a breeze of considerable strength or veloc- ity; a strong breeze.

strong breeze, a breeze (numberd 6 in Beaufort's winds

scale) having a velocity of about 10.7 meters per second. bridle 'bzai-dl n. that portion of the gear of a kite by which

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