|
Man-portable Air-defense Systems
Man-portable air-defense systems (MANPADS or MPADS) are portable shoulder-launched surface-to-air missiles. They are guided weapons and are a threat to low-flying aircraft, especially helicopters and also used against low-flying cruise missiles. These short-range missiles can also be fired from vehicles, tripods, weapon platforms, and warships. Overview MANPADS were developed in the 1950s to provide military ground forces with protection from jet aircraft. They have received a great deal of attention, partly because armed terrorist groups have used them against commercial airliners. These missiles, affordable and widely available through a variety of sources, have been used successfully over the past three decades, both in military conflicts, by militant groups, and by terrorist organizations. Twenty-five countries, including China, Iran, Poland, Russia, Sweden, the United Kingdom and the United States produce man-portable air defense systems.CRS RL31741 page 1 Possession, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Infrared Signature
Infrared signature, as used by defense scientists and the military, is the appearance of objects to infrared sensors. An infrared signature depends on many factors, including the shape and size of the object, temperature, and emissivity, reflection of external sources ( earthshine, sunshine, skyshine) from the object's surface, the background against which it is viewed and the waveband of the detecting sensor. As such there is no all-encompassing definition of infrared signature nor any trivial means of measuring it. For example, the infrared signature of a truck viewed against a field will vary significantly with changing weather, time of day and engine loading. Two fairly successful examples of defining the infrared signature of an object are the apparent temperature difference at the sensor and the contrast radiant intensity (CRI) definitions. Apparent temperature difference The apparent temperature difference method of defining infrared signature gives the physical temperat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FIM-92 Stinger
The FIM-92 Stinger is an American man-portable air-defense system (MANPADS) that operates as an infrared homing surface-to-air missile (SAM). It can be adapted to fire from a wide variety of ground vehicles, and from helicopters and drones as the Air-to-Air Stinger (ATAS). It entered service in 1981 and is used by the militaries of the United States and 29 other countries. It is principally manufactured by Raytheon Missiles & Defense and is produced under license by Airbus Defence and Space in Germany and by Roketsan in Turkey. Description The FIM-92 Stinger is a passive surface-to-air missile that can be shoulder-fired by a single operator (although standard military procedure calls for two operators team chief and gunner). The Stinger was intended to supplant the FIM-43 Redeye system, the principal difference being that, unlike the Redeye, the Stinger can acquire the target from head-on, giving much more time to acquire and destroy the target. The FIM-92B missile can also be f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
9K38 Igla
The 9K38 Igla (, "needle", NATO reporting name SA-18 Grouse) is a Soviet/Russian man-portable infrared homing surface-to-air missile (SAM) system. A simplified, earlier version is known as the 9K310 Igla-1 (NATO: SA-16 Gimlet), and the latest variant is the 9K338 Igla-S (SA-24 Grinch). The Igla-1 entered service in 1981, the Igla in 1983, and the Igla-S in 2004. The Igla has been supplemented by the 9K333 Verba since 2014.New Russian Verba MANPADS will replace Igla-S - Armyrecognition.com, 15 September 2014 History The development of the Igla short-range man-portable air defense system ( |
Mistral Missile
The Missile Transportable Anti-aérien Léger (English: Transportable lightweight anti-air missile), commonly called Mistral, is a French infrared homing short range air defense system manufactured by MBDA France (formerly by Matra Défense and then Matra BAe Dynamics). Based on the French SATCP (''Sol-Air à Très Courte Portée''), the development of the portable system later to become the Mistral began in 1974. The first version of the system was introduced in 1988 (S1), the second in 1997 (Mistral 2), and the third in 2018 (Mistral 3). Description Mistral is a short-range air defence (SHORAD) missile system that can be used from vehicles, surface ships, and helicopters, as well as in a portable configuration. The "Mistral" missile is transported in a transport and launch container (MPC) together with "friend or foe" interrogator, power source and tripod with its sighting devices. It differs from MANPADS systems in that it is necessarily fired from a structure bringing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
9K34 Strela-3
The 9K34 Strela-3 (, 'arrow', NATO reporting name: SA-14 Gremlin) is a man-portable air defense missile system (MANPADS) developed in the Soviet Union as a response to the poor performance of the earlier 9K32 Strela-2 (SA-7 Grail) system. The missile was largely based on the earlier Strela 2, and thus development proceeded rapidly. The new weapon was accepted into service in the Soviet Army in January 1974. Description The most significant change over the Strela 2 was the introduction of an all-new infra-red homing seeker head. The new seeker worked on FM modulation (con-scan) principle, which is less vulnerable to jamming and decoy flares than the earlier AM (spin-scan) seekers, which were easily fooled by flares and even the most primitive infrared jammers. The new seeker also introduced detector element cooling in the form of a pressurized nitrogen bottle attached to the launcher. The effect of cooling was to expand the seeker's lead sulfide detector element's sensitivi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ahfad Al-Rasul Brigades
The Ahfad al-Rasul Brigades ( ''Al-wiat Aḥfād ar-Rasūl'', "Grandsons of the Prophet Brigades") was a Syrian rebel group fighting against the Syrian government in the Syrian Civil War. It was funded by the Qatari government. Structure and member groups Its notable subgroups included the Justice Battalion, the Golan Martyrs Battalion, the Golan Hawks Battalion, the Falcons of Mount Zawiya Brigade, and the Qalamoun Liberation Front. By August 2013, the group had coopted some 50 groups from across Syria; however, it was strongest in Idlib Governorate. Its leader, Colonel Ziad Haj Obaid, was on the Arms Committee of the Supreme Military Council. The Allahu Akbar Brigade, based in al-Bukamal in the Deir ez-Zor Governorate, was also part of Ahfad al-Rasul. In July 2013, Al Jazeera reported that the Allahu Akbar Brigade consisted of around 800 fighters. History On 11 October 2012, the Ahfad al-Rasul Brigades, in coordination with Ansar al-Islam, conducted a bombing of Syria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jet Engine
A jet engine is a type of reaction engine, discharging a fast-moving jet (fluid), jet of heated gas (usually air) that generates thrust by jet propulsion. While this broad definition may include Rocket engine, rocket, Pump-jet, water jet, and hybrid propulsion, the term typically refers to an internal combustion airbreathing jet engine, air-breathing jet engine such as a turbojet, turbofan, ramjet, pulse jet engine, pulse jet, or scramjet. In general, jet engines are internal combustion engines. Air-breathing jet engines typically feature a Axial compressor, rotating air compressor powered by a turbine, with the leftover power providing thrust through the propelling nozzle—this process is known as the Brayton cycle, Brayton thermodynamic cycle. Jet aircraft use such engines for long-distance travel. Early jet aircraft used turbojet engines that were relatively inefficient for subsonic flight. Most modern subsonic jet aircraft use more complex High-bypass turbofan, high-bypas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Infrared Homing
Infrared homing is a Missile guidance#Passive homing, passive weapon guidance system which uses the infrared (IR) light emission from a target to track and follow it seamlessly. Missiles which use infrared seeking are often referred to as "heat-seekers" since infrared is radiated strongly by hot bodies. Many objects such as people, vehicle engines and aircraft generate and emit heat and so are especially visible in the infrared wavelengths of light compared to objects in the background. Infrared seekers are passive devices, which, unlike radar, provide no indication that they are tracking a target. That makes them suitable for sneak attacks during visual encounters or over longer ranges when they are used with a forward looking infrared or similar cueing system. Heat-seekers are extremely effective: 90% of all timeline of United States military operations, United States air combat losses between 1984 and 2009 were caused by infrared-homing missiles. They are, however, subject ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HN-5
The HN-5 (; NATO reporting name: CH-SA-3) is a family of first generation Chinese man-portable air-defense systems ( MANPAD) based on Soviet technology. The HN abbreviation is used to avoid confusion with the HY (Hai Ying, or Sea Eagle) series anti-ship missiles of the Silkworm missile family. The HN-5 series in Chinese hands has been phased out in front-line and first line reserve units by QW series MANPAD, but still being used by militia units. Development The HN-5 is a reverse-engineered version of the Soviet Strela 2 (SA-7). Due to the urgent need for MANPADs, North Vietnam provided China with an original sample during the Vietnam War and asked China to produce and supply NVA with copies. However, due to the political turmoil in China, namely, the Cultural Revolution, the reverse-engineering process was slow and by the time the first small production batch was sent to Vietnam for evaluation, the results were ineffective because American aircraft has already adopt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermoelectric Cooling
Thermoelectric cooling uses the Peltier effect to create a heat flux at the junction of two different types of materials. A Peltier cooler, heater, or thermoelectric heat pump is a Solid-state physics, solid-state active heat pump which transfers heat from one side of the device to the other, with consumption of electrical energy, depending on the direction of the current. Such an instrument is also called a Peltier device, Peltier heat pump, solid state refrigerator, or thermoelectric cooler (TEC) and occasionally a thermoelectric battery. It can be used either for heating or for cooling, although in practice the main application is cooling since heating can be achieved with simpler devices (with Joule heating). It can also be used as a temperature controller that either heats or cools. This technology is far less commonly applied to refrigeration than vapor-compression refrigeration is. The primary advantages of a Peltier cooler compared to a vapor-compression refrigerator are it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
