helicopter rotor blade
51Downwash — The effect of downwash from a hovering helicopter is clearly visible on the surface of water below. In aeronautics downwash is the air forced down by the aerodynamic action of a wing or helicopter rotor blade in motion, as part of the process of… …
52C-spar — A spanwise structural member along a helicopter rotor blade between the D nose and the main spar, closed at the front and open at the rear. The D nose is the strong airfoil leading edge of a rotor, formed from heavy skin and spar. See also D nose …
53alpha hinge — The hinge at the root of a helicopter rotor blade with its axis perpendicular to the plane of rotation. It allows the blade tip to move back and forth in its plane of rotation. Movement about the alpha hinge is called drag. Drag dampers oppose… …
54lead-lag hinge — The hinge at the root of a helicopter rotor blade with its axis perpendicular to the plane of rotation. It allows the blade tip to move back and forth in its plane of rotation. Movement about the lead lag is called drag. Drag dampers oppose this… …
55Deicing — An Aeroflot Airbus A330 being de iced at Sheremetyevo International Airport …
56Ludwig (cartoon) — Ludwig was a surreal 1977 British made children s cartoon animation about a magical egg shaped gemstone who lived in a forest. The programme was produced by father and son team, Mirek and Peter Lang. Peter went on to co produce Pigeon Street.The… …
57feather — i. The rotation of a helicopter rotor blade about its pitch change axis. ii. Turning propeller blades to a feathering angle to minimize drag and prevent further damage that could lead to engine failure. Position of propeller at various stages of… …
58feathering axis — The axis about which the pitch angle of a helicopter rotor blade is varied. The feathering axis is the same as a spanwise axis …
59flap — i. Auxiliary controls built into the wings and used to increase the camber. Flaps may be on the leading or the trailing edges. Trailing edge flaps reduce the stalling angle, whereas leading edge flaps increase the stalling angle when referred to… …
60pressure face — The side of a propeller or a helicopter rotor blade formed by the lower surfaces of airfoil elements, over which pressure is usually greater than the atmosphere …
