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Lazarov Laz-7
The Lazarov Laz-7 was a Bulgarian training aircraft of the 1940s and 50s. The first of three prototypes flew on 12 June 1948, and was followed by 160 production aircraft powered by a Czechoslovakian Walter Minor 6-III inline engine built from 1949 to 1952, and 150 Laz-7Ms (also known as the Zak-1) powered by a Soviet Shvetsov M-11FR radial engine from 1952 to 1954. A single example of a four-seat light transport derivative, the Laz-8, was built in 1949. The Laz-7 and Laz-7M were used by the Bulgarian Air Force as a trainer and light bomber, and surplus examples were later transferred to flying clubs, were they remained in use until the late 1960s. Design and development In April 1946, Yugoslavia issued a specification for an elementary training aircraft for the Yugoslav Air Force and civil training with aero clubs. On learning of the specification, , chief designer of the Bulgarian State Aircraft Factory (( Bulgarian: Държавна самолетна фабрика (''Darzhavn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WikiProject Aircraft
A WikiProject, or Wikiproject, is an affinity group for contributors with shared goals within the Wikimedia movement. WikiProjects are prevalent within the largest wiki, Wikipedia, and exist to varying degrees within Wikimedia project, sibling projects such as Wiktionary, Wikiquote, Wikidata, and Wikisource. They also exist in different languages, and translation of articles is a form of their collaboration. During the COVID-19 pandemic, CBS News noted the role of Wikipedia's WikiProject Medicine in maintaining the accuracy of articles related to the disease. Another WikiProject that has drawn attention is WikiProject Women Scientists, which was profiled by ''Smithsonian Magazine, Smithsonian'' for its efforts to improve coverage of women scientists which the profile noted had "helped increase the number of female scientists on Wikipedia from around 1,600 to over 5,000". On Wikipedia Some Wikipedia WikiProjects are substantial enough to engage in cooperative activities with outsi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fuselage
The fuselage (; from the French language, French ''fuselé'' "spindle-shaped") is an aircraft's main body section. It holds Aircrew, crew, passengers, or cargo. In single-engine aircraft, it will usually contain an Aircraft engine, engine as well, although in some amphibious aircraft the single engine is mounted on a hardpoint, pylon attached to the fuselage, which in turn is used as a floating Hull (watercraft), hull. The fuselage also serves to position the Flight control surfaces, control and Stabilizer (aeronautics), stabilization surfaces in specific relationships to Wing, lifting surfaces, which is required for aircraft stability and maneuverability. Types of structures Truss structure This type of structure is still in use in many lightweight aircraft using welding, welded steel tube trusses. A box truss fuselage structure can also be built out of wood—often covered with plywood. Simple box structures may be rounded by the addition of supported lightweight strin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Enthusiast
''Air Enthusiast'' was a British, bi-monthly, aviation magazine, published by the Key Publishing group. Initially begun in 1974 as ''Air Enthusiast Quarterly'', the magazine was conceived as a historical adjunct to ''Air International'' magazine. ''Air International'' was (and remains) involved with current aviation topics and the ''Quarterly'' concerned itself with historical matters. Each issue contained 80 pages; as a result certain articles were divided and each part appeared over a number of issues. ''Air Enthusiast'' was illustrated with colour and black-and-white photos, diagrams, profiles and three-view drawings. Earlier issues featured cutaway drawings, but these were dropped. The articles provided detail for varieties of aircraft and events. The magazine was published by three publishing companies and changed editors once, with William Green and Gordon Swanborough as joint editors for 16 years and Ken Ellis as the sole editor for the final 16 years. The magazine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sofia
Sofia is the Capital city, capital and List of cities and towns in Bulgaria, largest city of Bulgaria. It is situated in the Sofia Valley at the foot of the Vitosha mountain, in the western part of the country. The city is built west of the Iskar (river), Iskar river and has many mineral springs, such as the Sofia Central Mineral Baths. It has a humid continental climate. Known as Serdica in Classical antiquity, antiquity, Sofia has been an area of human habitation since at least 7000 BC. The recorded history of the city begins with the attestation of the conquest of Serdica by the Roman Republic in 29 BC from the Celtic settlement of Southeast Europe, Celtic tribe Serdi. During the decline of the Roman Empire, the city was raided by Huns, Visigoths, Pannonian Avars, Avars, and Slavs. In 809, Serdica was incorporated into the First Bulgarian Empire by Khan (title), Khan Krum and became known as Sredets. In 1018, the Byzantine Empire, Byzantines ended Bulgarian rule until 1194, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plovdiv Airport
Plovdiv Airport () is an airport that serves Plovdiv, the second largest city in Bulgaria, and is the country's 4th busiest airport. It is sometimes referred to as Plovdiv Krumovo Airport, after a small village located 6 km south-east away from the city on the main Plovdiv- Asenovgrad second class road. Plovdiv Airport serves the nearby ski resorts of Bansko, Pamporovo and Borovets, and therefore serves mainly charter flights, during the winter season from the end of December until March. The main traffic at present is charter flights to and from the United Kingdom and Germany. The airport also plays a vital role in case of emergencies and is sometimes used as an alternate for Sofia Airport, which is almost 150 km away or 1.5-hour drive on the Trakiya motorway. History The beginning of civil aviation at Plovdiv came with the first test flight between Sofia-Plovdiv-Yambol and Burgas early in 1928. In 1947, interim civilian flights between Sofia and Plovdiv were carrie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
COMECON
The Council for Mutual Economic Assistance, often abbreviated as Comecon ( ) or CMEA, was an economic organization from 1949 to 1991 under the leadership of the Soviet Union that comprised the countries of the Eastern Bloc#List of states, Eastern Bloc along with a number of socialist states elsewhere in the world. The descriptive term was often applied to all multilateral activities involving members of the organization, rather than being restricted to the direct functions of Comecon and its organs. This usage was sometimes extended as well to bilateral relations among members because in the system of Communism, communist international economic relations, multilateral accords typically of a general nature tended to be implemented through a set of more detailed, bilateral agreements. Comecon was the Eastern Bloc's response to the formation in Western Europe of the Marshall Plan and the OEEC, which later became the OECD. History Foundation The Comecon was founded in 1949 by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attack Aircraft
An attack aircraft, strike aircraft, or attack bomber is a tactical military aircraft that has a primary role of carrying out airstrikes with greater precision than bombers, and is prepared to encounter strong low-level air defenses while pressing the attack.Mortensen 1987, pp. 24–25. This class of aircraft is designed mostly for close air support and naval air-to-surface missions, overlapping the tactical bomber mission. Designs dedicated to non-naval roles are often known as ground-attack aircraft.Gunston 2009, p. 73. Fighter aircraft often carry out the attack role, although they would not be considered attack aircraft ''per se''; fighter-bomber conversions of those same aircraft would be considered part of the class. Strike fighters, which have effectively replaced the fighter-bomber and light bomber concepts, also differ little from the broad concept of an attack aircraft. The dedicated attack aircraft as a separate class existed primarily during and after World W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulgarian Communist Party
The Bulgarian Communist Party ( Bulgarian: Българска комунистическа партия (БΚП), Romanised: ''Bŭlgarska komunisticheska partiya''; BKP) was the founding and ruling party of the People's Republic of Bulgaria from 1946 until 1990, when the country ceased to be a socialist satellite state of the Soviet Union. The party had dominated the Fatherland Front, a coalition that took power in 1944, late in World War II, after it led a coup against Bulgaria's tsarist regime in conjunction with the Red Army's crossing of the border. It controlled its armed forces, the Bulgarian People's Army. The BCP was organized on the basis of democratic centralism, a principle introduced by the Russian Marxist scholar and leader Vladimir Lenin, which entails democratic and open discussion on policy on the condition of unity in upholding the agreed-upon policies. The highest body of the BCP was the Party Congress, convened every fifth year. When the Party Congress wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yakovlev Yak-18
The Yakovlev Yak-18 (; NATO reporting name Max) is a tandem two-seat military primary trainer aircraft manufactured in the Soviet Union. Originally powered by one 119 kW (160 hp) Shvetsov M-11FR-1 radial piston engine, it entered service in 1946. It was also produced in China as the Nanchang CJ-5. Design and development A member of the second generation of Russian aircraft designers, and best known for fighter designs, Alexander Sergeyevich Yakovlev always retained a light aircraft design section. In May 1945, Yakovlev initiated design of the Yak-18 two-seat primary trainer. He designed it to replace the earlier Yakovlev UT-2 and Yakovlev Yak-5 in service with the Soviet Air Forces and DOSAAF (Voluntary Society for Collaboration with the Army, Air Force and Navy, which sponsored aero clubs throughout the USSR). In 1944, an advanced version of the UT-2 had been built with many of the features of the new Yak-18. The new aircraft flew a year later, powered by a 119&n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vickers Machine Gun
The Vickers machine gun or Vickers gun is a Water cooling, water-cooled .303 British (7.7 mm) machine gun produced by Vickers Limited, originally for the British Army. The gun was operated by a three-man crew but typically required more men to move and operate it: one fired, one fed the ammunition, the others helped to carry the weapon, its ammunition, and spare parts. It was in service from before the First World War until the 1960s, with air-cooled versions of it on many Allies of World War I, Allied World War I Aviation in World War I, fighter aircraft. The weapon had a reputation for great solidity and reliability. Ian V. Hogg, in ''Weapons & War Machines'', describes an action that took place in August 1916, during which the British 100th Company of the Machine Gun Corps fired their ten Vickers guns to deliver sustained fire for twelve hours. Using 100 barrels, they fired a million rounds without breakdowns. "It was this absolute foolproof reliability which endear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walter Minor
The Walter Minor is a family of four- and six-cylinder inverted inline air-cooled engines, developed under auspices of ing. Šimůnek and used on light aircraft. First produced in 1929, the Minor engines' family has an advanced design for the period and sports steel cylinders, aluminum heads and overhead valves, with identical bore and stroke of and , respectively. Typical power ratings varied from . After Walter concentrated on the turbine powerplants only, the production of piston engines has been transferred to the Avia Motors, Avia company that further developed the family, bringing fuel injection, as the Avia M-137 and M-337. Nowadays the smallest of the family, the four-cylinder carburetted Minor, is produced by a small company in the Czech Republic, while the M337 was available from the LOM Prague. Variants 4 Cylinder ;Minor 4-I: ;Minor 4-II: ;Minor 4-III: ;Minor 4-IIIS: A 4-III fitted with a crankshaft driven supercharger. ;Minor M 332 (4 cyl.) 6 Cylinder ;Minor 6-I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
