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Aeronautical Technical Institute
Aeronautical Technical Institute ( sr, Ваздухопловнотехнички институт, Vazduhoplovnotehnički institut) was a Yugoslav design bureau for aeronautical research and design of military aircraft. It was established on August 10, 1946, by an order of the Supreme Commander of the Armed Forces of Yugoslavia, and was located in Žarkovo, Belgrade. It existed from 1946 to 1992 and was responsible for the design of the majority of Yugoslav military aircraft. Aircraft designed by the institute include the J-20 Kraguj, the G-2 Galeb, the G-4 Super Galeb, the J-22 Orao, the Lasta and the (cancelled) Novi Avion. After the dissolution of Yugoslavia and the Yugoslav People's Army (JNA), the Aeronautical Technical Institute was dissolved and assimilated into the Military Technical Institute ( sr, Војнотехнички институт, Vojnotehnički institut; abbr. {{lang, sr-Latn, VTI) in an effort to reduce developing cost and maintenance since both institute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Logo Of VTI Zarkovo
A logo (abbreviation of logotype; ) is a graphic mark, emblem, or symbol used to aid and promote public identification and recognition. It may be of an abstract or figurative design or include the text of the name it represents as in a wordmark. In the days of hot metal typesetting, a logotype was one word cast as a single piece of type (e.g. "The" in ATF Garamond), as opposed to a ligature, which is two or more letters joined, but not forming a word. By extension, the term was also used for a uniquely set and arranged typeface or colophon. At the level of mass communication and in common usage, a company's logo is today often synonymous with its trademark or brand.Wheeler, Alina. ''Designing Brand Identity'' © 2006 John Wiley & Sons, Inc. (page 4) Etymology Douglas Harper's Online Etymology Dictionary states that the term 'logo' used in 1937 "probably a shortening of logogram". History Numerous inventions and techniques have contributed to the contemporary logo, includ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Utva Aviation Industry
Utva Aviation Industry (commonly known as UTVA) is a Serbian manufacturer of general aviation aircraft, subsidiary of Yugoimport SDPR, headquartered in Pančevo. History Utva was founded on 5 June 1937 in Zemun, since 1940 located in Pančevo, produced simple gliders. In 1939 Utva began manufacturing light piston engine aircraft. During the NATO bombing of Yugoslavia in 1999, the factory was heavily damaged. In 2017, Serbian defence company Yugoimport SDPR became the majority stakeholder of Utva with around 96% of total shares. Products Aircraft Gliders Unmanned aerial vehicles See also * Aero East Europe Sila * Defense industry of Serbia The defense industry of Serbia is the largest in the Western Balkans. For the 2018 calendar year, Serbia's export of weapons and military equipment was valued at $897 million (€796 million). It consists of around 200 companies, both public and pr ... * Aircraft industry of Serbia References Footnotes Notes External lin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Missiles
In military terminology, a missile is a guided airborne ranged weapon capable of self-propelled flight usually by a jet engine or rocket motor. Missiles are thus also called guided missiles or guided rockets (when a previously unguided rocket is made guided). Missiles have five system components: targeting, guidance system, flight system, engine and warhead. Missiles come in types adapted for different purposes: surface-to-surface and air-to-surface missiles (ballistic missile, ballistic, cruise missile, cruise, anti-ship missile, anti-ship, anti-submarine missile, anti-submarine, anti-tank missile, anti-tank, etc.), surface-to-air missiles (and anti-ballistic missile, anti-ballistic), air-to-air missiles, and anti-satellite weapons. Airborne explosive devices without propulsion are referred to as shell (projectile), shells if fired by an artillery piece and bombs if dropped by an aircraft. Unguided jet- or rocket-propelled weapons are usually described as rocket artillery. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Supersonic Wind Tunnel
A supersonic wind tunnel is a wind tunnel that produces supersonic speeds (1.2< M<5) The Mach number and flow are determined by the nozzle geometry. The Reynolds number is varied by changing the density level (pressure in the settling chamber). Therefore, a high pressure ratio is required (for a supersonic regime at M=4, this ratio is of the order of 10). Apart from that, condensation of moisture or even gas liquefaction can occur if the static temperature becomes cold enough. This means that a supersonic wind tunnel usually needs a drying or a pre-heating facility. A supersonic wind tunnel has a large power demand, so most are designed for intermittent instead of continuous operation. Restrictions for supersonic tunn ...
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Water Tunnel (hydrodynamic)
A water tunnel is an experimental facility used for testing the hydrodynamic behavior of submerged bodies in flowing water. It functions similar to a recirculating wind tunnel, but uses water as the working fluid, and related phenomena are investigated, such as measuring the forces on scale models of submarines or lift and drag on hydrofoils. Water tunnels are sometimes used in place of wind tunnels to perform measurements because techniques like particle image velocimetry (PIV) are easier to implement in water. For many cases as long as the Reynolds number is equivalent, the results are valid, whether a submerged water vehicle model is tested in air or an aerial vehicle is tested in water. For low Reynolds number flows, tunnels can be made to run oil instead of water. The advantage is that the increased viscosity will allow the flow to be a faster speed (and thus easier to maintain in a stable manner) for a lower Reynolds number. Whereas in wind tunnels the driving force is u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cavitation
Cavitation is a phenomenon in which the static pressure of a liquid reduces to below the liquid's vapour pressure, leading to the formation of small vapor-filled cavities in the liquid. When subjected to higher pressure, these cavities, called "bubbles" or "voids", collapse and can generate shock waves that may damage machinery. These shock waves are strong when they are very close to the imploded bubble, but rapidly weaken as they propagate away from the implosion. Cavitation is a significant cause of wear in some engineering contexts. Collapsing voids that implode near to a metal surface cause cyclic stress through repeated implosion. This results in surface fatigue of the metal causing a type of wear also called "cavitation". The most common examples of this kind of wear are to pump impellers, and bends where a sudden change in the direction of liquid occurs. Cavitation is usually divided into two classes of behavior: inertial (or transient) cavitation and non-inertial c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subsonic And Transonic Wind Tunnel
Low subsonic tunnel Low-speed wind tunnels are used for operations at very low Mach number, with speeds in the test section up to 480 km/h (~ 134 m/s, M = 0.4). They may be of open-return type (also known as the Eiffel type, see figure), or closed-return flow (also known as the Prandtl type, see figure) with air moved by a propulsion system usually consisting of large axial fans that increase the dynamic pressure to overcome the viscous losses. Open wind tunnel The working principle is based on the continuity and Bernoulli's equation: The continuity equation is given by: A V = constant \Rightarrow \frac=-\frac The Bernoulli equation states:- P_=P_ + P_ = P_s + \frac\rho V^2 Putting Bernoulli into the continuity equation gives: V_m^2=2 \frac \frac \approx 2 \frac The contraction ratio of a windtunnel can now be calculated by: C = \frac Closed wind tunnel In a return-flow wind tunnel the return duct must be properly designed to reduce the pressure losses and to en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Counter-insurgency Aircraft
Counter-insurgency aircraft or COIN aircraft are a specialized variety of military light attack aircraft, designed for counter-insurgency operations, armed reconnaissance, air escort of ground forces, and ground support against "low-intensity engagements"; usually irregular groups of insurgents armed with aircraft artillery and/or portable rockets. Roles Some of the roles carried out by counter-insurgency aircraft include: *Transportation in support of combatants and civilians alike, including casualty evacuation (CASEVAC). *Intelligence gathering, surveillance, and reconnaissance. * Psychological operations (PSYOPs) through leaflet drops, loudspeakers, and radio broadcasts. *Air-to-ground attack against soft targets. For an aircraft—whether fixed-wing or rotary—to effectively carry out all these roles, it should have specification characteristics such as low loitering speed, long endurance, simplicity in maintenance, and the capability to perform short or vertical take-of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kobac
The UTVA Kobac (English: ''Sparrowhawk'') was a prototype Serbian single-engine, low-wing tandem-seat turboprop training/light attack aircraft manufactured by Pančevo based UTVA Aviation Industry and designed by the Military Technical Institute. Revealed as a mockup on 02 September 2012 during the Batajnica 2012 Air Show, the aircraft's first flight was planned for 2013, but was never realized. Design Concept Based on the proven UTVA Lasta 95P-2 tandem two-seat low-wing trainer, the Kobac promised a maximum speed and was intended to serve the Serbian Airforce and export customers with advanced training in all weather conditions. Equipped with the capability to conduct border patrols and strikes against ground-based targets, the aircraft was touted as a close air support, counterinsurgency, and reconnaissance aircraft similar to the Super Tucano and Texan II. The Kobac concept envisioned modifications to the Lasta platform to suit advanced new roles. Most importantly it was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Utva Lasta
The Utva Lasta 95 is a light military trainer aircraft produced by Utva Aviation Industry, subsidiary of Yugoimport SDPR. It is a tandem two-seater low-wing trainer with a metal airframe. The aircraft is capable of basic training functions including aerobatics, instrument and tactical flying, as well as basic training in use of weapons. The first prototype of ''Lasta 1'' flew on 2 September 1985, while the first prototype of the current version, ''Lasta 3'', flew on February 26, 2009. ''Lasta'' is the Serbian word for barn swallow. Design and development The Lasta was originally developed to be a replacement of the Utva 75 and, partially, Soko G-2 Galeb, which had been the most commonly used trainer aircraft of the Yugoslav Air Force up until 1991. The first prototype ''Lasta 1'' was completed by the spring of 1985. Following completion of the initial testing phase, the first flight was achieved on September 2, 1985. In January 1989, design of a modified version – ''Lasta 2'' w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pančevo
Pančevo (Serbian Cyrillic: Панчево, ; german: Pantschowa; hu, Pancsova; ro, Panciova; sk, Pánčevo) is a city and the administrative center of the South Banat District in the autonomous province of Vojvodina, Serbia. It is located on the shores of rivers Tamiš and Danube, in the southern part of Banat region. Since the 2011 census 123,414 people have been living in the Pančevo administrative area. Pančevo is the fourth largest city in Vojvodina and the ninth largest in Serbia by population. Pančevo was first mentioned in 1153 and was described as an important mercantile place. It gained the status of a city in 1873 following the disestablishment of the Military Frontier in that region. For most of its period, it was the part of the Kingdom of Hungary and after 1920 it became part of the Kingdom of Serbs, Croats and Slovenes, which was renamed in 1929 to Yugoslavia. Since then with one interruption it was part of several Yugoslav states and after the dissolution ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mostar
Mostar (, ; sr-Cyrl, Мостар, ) is a city and the administrative center of Herzegovina-Neretva Canton of the Federation of Bosnia and Herzegovina, an entity of Bosnia and Herzegovina, and the historical capital of Herzegovina. Mostar is situated on the Neretva River and is the fifth-largest city in the country. Mostar was named after the bridge keepers (''mostari'') who in the medieval times guarded the Stari Most (Old Bridge) over the Neretva. The Old Bridge, a UNESCO World Heritage Site, built by the Ottoman Bosnia and Herzegovina, Ottomans in the 16th century, is one of Bosnia and Herzegovina's most visited landmarks, and is considered an exemplary piece of Islamic architecture in the Balkans. History Ancient and medieval history Human settlements on the river Neretva, between Mount Hum (Mostar), Mount Hum and the Velež Mountain, have existed since prehistory, as witnessed by discoveries of fortified enceintes and cemeteries. Evidence of Roman people, Roman occupation wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
