back

back
i. The curved surface of a propeller blade. It corresponds to the upper surface of the airplane’s wing. Also called a blade back.
ii. The back of the power curve, where any decrease in speed results in a disproportional increase in drag. A stage may be reached when even with full power the aircraft may continue to sink. Also referred to as behind the power curve and backside of the power curve.
iii. The top part or the upper surface area of an airplane, especially of an airplane’s fuselage, referred to in such contexts as “to fly on its back.”
iv. The back seat (rear cockpit) of a two-seater combat or trainer aircraft.
v. The changing of wind direction in the anticlockwise direction. When the wind direction changes in the anticlockwise direction, it is called backing; when the change is clockwise, it is called veering.

Aviation dictionary. 2014.

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  • Back — (b[a^]k), v. t. [imp. & p. p. {Backed} (b[a^]kt); p. pr. & vb. n. {Backing}.] [1913 Webster] 1. To get upon the back of; to mount. [1913 Webster] I will back him [a horse] straight. Shak. [1913 Webster] 2. To place or seat upon the back. [R.]… …   The Collaborative International Dictionary of English

  • Back — (b[a^]k), n. [AS. b[ae]c, bac; akin to Icel., Sw., & LG. bak, Dan. bag; cf. OHG. bahho ham, Skr. bhaj to turn, OSlav. b[=e]g[u^] flight. Cf. {Bacon}.] 1. In human beings, the hinder part of the body, extending from the neck to the end of the… …   The Collaborative International Dictionary of English

  • Back — Back, adv. [Shortened from aback.] 1. In, to, or toward, the rear; as, to stand back; to step back. [1913 Webster] 2. To the place from which one came; to the place or person from which something is taken or derived; as, to go back for something… …   The Collaborative International Dictionary of English

  • Back — eines kleineren Schiffes Back eines Massengutfrachters Back ist ein s …   Deutsch Wikipedia

  • Back — Back, a. 1. Being at the back or in the rear; distant; remote; as, the back door; back settlements. [1913 Webster] 2. Being in arrear; overdue; as, back rent. [1913 Webster] 3. Moving or operating backward; as, back action. [1913 Webster] {Back… …   The Collaborative International Dictionary of English

  • Back In... — Back In... is a retrospective documentary series currently broadcasting on the Canadian music video channel MuchMoreMusic. The series also airs on Star! and some Citytv stations. 20 episodes have been broadcast, each profiled by a different year …   Wikipedia

  • Back — Back, n. [F. bac: cf. Arm. bag, bak a bark, D. bak tray, bowl.] 1. A large shallow vat; a cistern, tub, or trough, used by brewers, distillers, dyers, picklers, gluemakers, and others, for mixing or cooling wort, holding water, hot glue, etc.… …   The Collaborative International Dictionary of English

  • Back — Back, v. i. 1. To move or go backward; as, the horse refuses to back. [1913 Webster] 2. (Naut.) To change from one quarter to another by a course opposite to that of the sun; used of the wind. [1913 Webster] 3. (Sporting) To stand still behind… …   The Collaborative International Dictionary of English

  • Back on My B.S. — Back on My B.S. Album par Busta Rhymes Sortie 19 mai 2009 Enregistrement 2006 – 2009 Durée 53:59 Genre Rap East C …   Wikipédia en Français

  • Back-On — Pays d’origine Japon, Tokyo, Adachi Genre musical Rock, Nu métal, Rap Années d activité …   Wikipédia en Français

  • back up — {v.} 1. To move backwards. * /The train was backing up./ 2. To help or be ready to help; stay behind to help; agree with and speak in support of. * /Jim has joined the Boy Scouts and his father is backing him up./ * /The principal backs up the… …   Dictionary of American idioms

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