conical surface


conical surface
A surface extending from the periphery of the horizontal surface outward and upward at a slope of 20 horizontal to 1 vertical for a horizontal distance of 4000 ft. It is an imaginary surface, in which any object that projects above the surface is considered an obstruction to air navigation.

Aviation dictionary. 2014.

Look at other dictionaries:

  • Conical surface — A circular conical surface In geometry, a (general) conical surface is the unbounded surface formed by the union of all the straight lines that pass through a fixed point the apex or vertex and any point of some fixed space curve the directrix… …   Wikipedia

  • Conical surface — Conic Con ic, Conical Con ic*al, a. [Gr. ?: cf. F. conique. See {Cone}.] 1. Having the form of, or resembling, a geometrical cone; round and tapering to a point, or gradually lessening in circumference; as, a conic or conical figure; a conical… …   The Collaborative International Dictionary of English

  • conical surface — noun mathematics : the surface generated by a moving straight line which always passes through a fixed point and intersects a fixed curve …   Useful english dictionary

  • Conical — Conic Con ic, Conical Con ic*al, a. [Gr. ?: cf. F. conique. See {Cone}.] 1. Having the form of, or resembling, a geometrical cone; round and tapering to a point, or gradually lessening in circumference; as, a conic or conical figure; a conical… …   The Collaborative International Dictionary of English

  • Conical pendulum — Conic Con ic, Conical Con ic*al, a. [Gr. ?: cf. F. conique. See {Cone}.] 1. Having the form of, or resembling, a geometrical cone; round and tapering to a point, or gradually lessening in circumference; as, a conic or conical figure; a conical… …   The Collaborative International Dictionary of English

  • Conical projection — Conic Con ic, Conical Con ic*al, a. [Gr. ?: cf. F. conique. See {Cone}.] 1. Having the form of, or resembling, a geometrical cone; round and tapering to a point, or gradually lessening in circumference; as, a conic or conical figure; a conical… …   The Collaborative International Dictionary of English

  • conical projection — /ˌkɒnɪkəl prəˈdʒɛkʃən/ (say .konikuhl pruh jekshuhn) noun a map projection based on the concept of projecting the earth s surface on a conical surface, which is then unrolled to a plane surface. Also, conic projection …   Australian English dictionary

  • Surface of revolution — A surface of revolution is a surface created by rotating a curve lying on some plane (the generatrix) around a straight line (the axis of rotation) that lies on the same plane. Examples of surfaces generated by a straight line are the cylindrical …   Wikipedia

  • Conical intersection — Ideal Conical Intersection In quantum chemistry, a conical intersection of two potential energy surfaces of the same spatial and spin symmetries is the set of molecular geometry points where the two potential energy surfaces are degenerate… …   Wikipedia

  • Conical mill — A conical mill (or conical screen mill) is a machine used to reduce the size of material in a uniform manner. It is an alternative to the hammermill or other forms of grinding mills. The conical mill operates by having the product being fed into… …   Wikipedia