Flapping
81delta-three hinge — A hub hinge arrangement that is a coupling effect between either the flapping or lead lag hinge and a blade pitch. A blade has a delta three hinge if the movement of the blade in either axis causes the blade pitch to change. Pitch change rod… …
82offset hinge — A helicopter main rotor hinge at a substantial distance from the axis of rotation. As compared with flapping hinges, offset flapping hinges provide better longitudinal and lateral stability and a wider center of gravity limits and permit the… …
83flap — [flap] n. [ME flappe < the v.] 1. anything flat and broad that is attached at one end and hangs loose or covers an opening [the flap of a pocket] 2. the motion or slapping sound of a swinging flap [the flap of an awning] 3. Archaic a blow with …
84fluttering — noun the motion made by flapping up and down • Syn: ↑flap, ↑flapping, ↑flutter • Derivationally related forms: ↑flutter, ↑flap (for: ↑flapping), ↑flap …
85flap — I. noun Etymology: Middle English flappe Date: 14th century 1. a stroke with something broad ; slap 2. obsolete something broad and flat used for striking 3. something that is broad, limber, or flat and usually thin and that hangs loose or… …
86waif — I. noun Etymology: Middle English weif, waif, from Anglo French, from waif, adjective, stray, unclaimed, probably of Scandinavian origin; akin to Old Norse veif something flapping, veifa to be in movement more at wipe Date: 14th century 1. a. a… …
87Autism — This article is about the classic autistic disorder; some writers use the word autism when referring to the range of disorders on the autism spectrum or to the various pervasive developmental disorders.[1] Autism …
88American English — US English redirects here. For the political organization, see U.S. English (organization). For other uses, see American English (disambiguation). English language prevalence in the United States. Darker shades of blue indicate higher… …
89Australian English — (AusE, AuE, AusEng, en AU[1]) is the name given to the group of dialects spoken in Australia that form a major variety of the English language. English is the primary language spoken throughout Australia …
90Butterfly effect — For other uses, see Butterfly effect (disambiguation). Point attractors in 2D phase space. In chaos theory, the butterfly effect is the sensitive dependence on initial conditions; where a small change at one place in a nonlinear system can result …
