plane of symmetry
121Wells turbine — The Wells turbine is a low pressure air turbine that rotates continuously in one direction in spite of the direction of the air flow. Its blades feature a symmetrical airfoil with its plane of symmetry in the plane of rotation and perpendicular… …
122Stagger (aviation) — Stagger Positive wing stagger of a de Havilland Tiger Moth …
123rake — rake1 rakable, rakeable, adj. raker, n. /rayk/, n., v., raked, raking. n. 1. an agricultural implement with teeth or tines for gathering cut grass, hay, or the like or for smoothing the surface of the ground. 2. any of various implements having a …
124yaw — yaw1 /yaw/, v.i. 1. to deviate temporarily from a straight course, as a ship. 2. (of an aircraft) to have a motion about its vertical axis. 3. (of a rocket or guided missile) to deviate from a stable flight attitude by oscillation of the… …
125activity — 1. In electroencephalography, the presence of neurogenic electrical energy. 2. In physical chemistry, an ideal concentration for which the law of mass action will apply perfectly; the ratio of the a. to the true concentr …
126downwash — i. Fluid flow moving at a deflected angle after deflection by helicopter rotors and measured parallel to the disc. ii. Fluid flow deflected at an angle more perpendicular to the motion of the airfoil, measured in the plane parallel to the plane… …
127principal axis — i. The lateral, vertical, and longitudinal axes. ii. The axis of relative wind. iii. The principal inertial axis: that line passing through the center of gravity in a plane of symmetry about which a long, slender body tends to rotate when rolling …
128yaw — I [[t]yɔ[/t]] v. i. 1) naut. navig. to deviate temporarily from a straight course, as a ship 2) aer. (of an aircraft) to have a motion about its vertical axis 3) rkt (of a rocket or guided missile) to deviate from a stable flight attitude by… …
