Page:Dictionary of aviation.djvu/70

 46 DICTIONARY OF AVIATION

bird- wing 'bB:zd,wirj n. the wing of a bird; a bird's wing.

bise biiz n. a dry cold north and northeast wind similar to the mistgal, in Provence and the Rhone valley.

bird-woman 'bBizd/wuman n. a woman who flies, by arti- ficial means, in a manner comparable to that of a bird; an aviatjess. compare birdman (sense 2)

blade bleed n. one of the floats, vanes, or sails of a pro- peller or wind^tuheel; a slat or narrow sustainingzsurface, as of a Phillips flyer.

blade-angle 'bleed^rjgsl n. the angle or degree of inclina- tion of a propellers=blade to the angle of bladeztjavel ; the angle of blade^setting; the blade^inclination.

blade-length 'bleed,lerj9 n. the length of a propeller^blade.

blade-section 'bleed,sek$9n n. the section or cress^section of a propellersWade.

blade-setting 'bleed,setirj n. the setting or mode of set or pose of a propellersblade.

blade-travel 'bleed,taev9l n. the tpevel or mode of move- ment of a propeller^blade, especially tuhen the propeller has its normal tjanslatory motion thru the air.

blast bla:st n. a forcible stream or jet of air, as from a blower, sometimes proposed as a source of propulsiv power for airships.

blizzard 'bhzazd n. a gale or hurricane with intense cold and dry, driving snow, especially common in Dakota and Manitoba.

blocking-cord 'blokir^koizd n. a kind of cord used in block- ing hats, and, in late years, sometimes empleyd as kite^ string or kite^line in meteorologic work.

blood-rain 'blAd,zeen n. rain which leaves red stains due to fungi containing red exid of iron, which have been raised into the atmosfere by the wind and which the rain brings down.

blower 'bloo-az n. a machine for blowing or forcing air; an apparatus for producing blasts, as in certain schemes for airship^propulsion ; a blowingsmachine ; an air^blower : as. a *blower for ballonets.

blowing-apparatus 'bloo-irj-aepa^ee-tas n. a blowmg^ma- chine; a bellows^like apparatus; a blower.

blue blou n. the blue sky or atmosfere ; the hevens ; the asure.

bluff WA adj. having or presenting a broad or expansxv front or surface, as a sfere.

boat boot n. the boat=shaped or boatelike car of certain bal- loons or airships.

boat-car 'boot,ka:z n. a boat?like car : as, the forward *boat? car of a Zeppelin airship, compare gondola.

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