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Jettison (aviation)
In aviation, to jettison is to discard fuel, external stores or other expendable items.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', page 292. Aviation Supplies & Academics, 1997. The item is usually jettisoned by operating a switch or handle; external stores may be separated from the aircraft by use of explosive bolts or a mechanism. ;Fuel jettison : Fuel jettisoning or fuel dumping is an emergency procedure used by crews of to reduce an aircraft's weight in an emergency when the aircraft meet its maximum landing weight. ;External stores jettison :Some military aircraft can carry weapons (for example bombs or rockets) and fuel tanks on external hardpoints. The pilot can jettison them if necessary, so they do not inhibit actions during combat or in an emergency. Airports may establish specific safe areas for the jettison of external stores, when required. See also *Fuel dumping Fuel dumping (or a fuel jettison) is a procedure used by aircraft in certa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drop Tank
In aviation, a drop tank (external tank, wing tank or belly tank) is used to describe auxiliary fuel tanks externally carried by aircraft. A drop tank is expendable and often capable of being jettisoned. External tanks are commonplace on modern military aircraft and occasionally found in civilian ones, although the latter are less likely to be discarded except in an emergency. Overview The primary disadvantage with drop tanks is that they impose a drag penalty on the aircraft. External fuel tanks will also increase the moment of inertia, thereby reducing roll rates for air maneuvers. Some of the drop tank's fuel is used to overcome the added drag and weight of the tank. Drag in this sense varies with the square of the aircraft's speed. The use of drop tanks also reduces the number of external hardpoints available for weapons, reduces the weapon-carrying capacity and increases the aircraft's radar signature. Usually the fuel in the drop tanks is consumed first, and only when a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JDAM GBU30 MER
The Joint Direct Attack Munition (JDAM) is a guidance kit that converts unguided bombs, or "dumb bombs", into all-weather precision-guided munitions. JDAM-equipped bombs are guided by an integrated inertial guidance system coupled to a Global Positioning System (GPS) receiver, giving them a published range of up to . JDAM-equipped bombs range from . The JDAM's guidance system was jointly developed by the United States Air Force and United States Navy, hence the "joint" in JDAM. When installed on a bomb, the JDAM kit is given a GBU (Guided Bomb Unit) identifier, superseding the Mark 80 or BLU (Bomb, Live Unit) nomenclature of the bomb to which it is attached. The JDAM is not a stand-alone weapon; rather it is a "bolt-on" guidance package that converts unguided gravity bombs into precision-guided munitions (PGMs). The key components of the system consist of a tail section with aerodynamic control surfaces, a (body) strake kit, and a combined inertial guidance system and GPS guidance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
