blade tip
41turbine — /terr bin, buyn/, n. any of various machines having a rotor, usually with vanes or blades, driven by the pressure, momentum, or reactive thrust of a moving fluid, as steam, water, hot gases, or air, either occurring in the form of free jets or as …
42Propeller — A propeller is essentially a type of fan which transmits power by converting rotational motion into thrust for propulsion of a vehicle such as an aircraft, ship, or submarine through a mass such as water or air, by rotating two or more twisted… …
43Turbofan — [ CFM56 3 turbofan, lower half, side view.] A turbofan is a type of jet engine, similar to a turbojet. It essentially consists of a ducted fan with a smaller diameter turbojet engine mounted behind it that powers the fan. Part of the airstream… …
44Switchblade — A switchblade (also known as automatic knife, switch, or in British English flick knife) is a type of knife with a folding or sliding blade contained in the handle which is opened by a spring when a button or lever on the grip is… …
45Helicopter noise reduction — is a topic of research into designing helicopters which can be operated more quietly, reducing the public relations problems with night flying or expanding an airport. In addition, it is useful for military applications in which stealth is… …
46Hook’s joint effect — The movement of a rotor blade to reposition itself relative to the other blades when a cyclic stick is applied. This situation arises when the plane of the rotor disc and the drive shaft are not normal to each other. In I and II, the helicopter… …
47Ducted fan — Bell X 22 on the tarmac A ducted fan is a propulsion arrangement whereby a fan, which is a type of propeller, is mounted within a cylindrical shroud or duct. The duct reduces losses in thrust from the tip vortices of the fan, and varying the… …
48screwdriver — /skrooh druy veuhr/, n. 1. a hand tool for turning a screw, consisting of a handle attached to a long, narrow shank, usually of metal, which tapers and flattens out to a tip that fits into the slotted head of a screw. 2. a mixed drink made with… …
49Unconventional wind turbines — Wind turbines History Design Manufacturers Unconventional As of 2010, the most common type of wind turbine is the three bladed horizontal axis wind turbine (HAWT). This article deals with various types of wind turbine that differ from the… …
50Gas turbine — Microturbine redirects here. For turbines in electricity, see Small wind turbine. For turbines driven by the flow of gas, see Turbine. A typical axial flow gas turbine turbojet, the J85, sectioned for display. Flow is left to right, multistage… …
