117-400: The Antonov An-148 ( Ukrainian : Антонов Ан-148 ) is a regional jet designed and built by Antonov of Ukraine . Development of the aircraft was started in the 1990s, and its maiden flight took place on 17 December 2004. The aircraft completed its certification programme on 26 February 2007. The An-148 has a maximum range of 2,100–4,400 km (1,100–2,400 nmi; 1,300–2,700 mi) and
234-414: A weak yer vowel that would eventually disappear completely, for example Old East Slavic котъ /kɔtə/ > Ukrainian кіт /kit/ 'cat' (via transitional stages such as /koˑtə̆/, /kuˑt(ə̆)/, /kyˑt/ or similar) or Old East Slavic печь /pʲɛtʃʲə/ > Ukrainian піч /pitʃ/ 'oven' (via transitional stages such as /pʲeˑtʃʲə̆/, /pʲiˑtʃʲ/ or similar). This raising and other phonological developments of the time, such as
351-610: A body of national literature, institute a Ukrainian-language educational system, and form an independent state (the Ukrainian People's Republic , shortly joined by the West Ukrainian People's Republic ). During this brief independent statehood the stature and use of Ukrainian greatly improved. In the Russian Empire Census of 1897 the following picture emerged, with Ukrainian being the second most spoken language of
468-528: A closed feedback loop. The pilot may not be fully aware of all the control outputs acting to affect the outcome, only that the aircraft is reacting as expected. The fly-by-wire computers act to stabilize the aircraft and adjust the flying characteristics without the pilot's involvement, and to prevent the pilot from operating outside of the aircraft's safe performance envelope . Mechanical and hydro-mechanical flight control systems are relatively heavy and require careful routing of flight control cables through
585-589: A combination of both. A "mixed" control system with mechanical backup feedbacks any rudder elevation directly to the pilot and therefore makes closed loop (feedback) systems senseless. Aircraft systems may be quadruplexed (four independent channels) to prevent loss of signals in the case of failure of one or even two channels. High performance aircraft that have fly-by-wire controls (also called CCVs or Control-Configured Vehicles) may be deliberately designed to have low or even negative stability in some flight regimes – rapid-reacting CCV controls can electronically stabilize
702-611: A day with the average flight time of 4–5 hours. On 21 December 2009, the An-148 was put into service in Russia with Rossiya airline. The first passenger flight was FV135 from Pulkovo Airport in Saint Petersburg to Sheremetyevo International Airport in Moscow . By 20 May 2010, Rossiya's An-148 fleet had accumulated a total of 915 flight hours and performed 710 landings. Rossiya complained that
819-499: A higher data transfer rate, immunity to electromagnetic interference and lighter weight. In most cases, the cables are just changed from electrical to optical fiber cables. Sometimes it is referred to as "fly-by-light" due to its use of fiber optics. The data generated by the software and interpreted by the controller remain the same. Fly-by-light has the effect of decreasing electro-magnetic disturbances to sensors in comparison to more common fly-by-wire control systems. The Kawasaki P-1
936-637: A policy of defending Ukraine's interests within the Soviet Union. He proudly promoted the beauty of the Ukrainian language and developed plans to expand the role of Ukrainian in higher education. He was removed, however, after only a brief tenure, for being too lenient on Ukrainian nationalism. The new party boss from 1972 to 1989, Volodymyr Shcherbytsky , purged the local party, was fierce in suppressing dissent, and insisted Russian be spoken at all official functions, even at local levels. His policy of Russification
1053-555: A result of close Slavic contacts with the remnants of the Scythian and Sarmatian population north of the Black Sea , lasting into the early Middle Ages , the appearance of the voiced fricative γ/г (romanized "h"), in modern Ukrainian and some southern Russian dialects is explained by the assumption that it initially emerged in Scythian and related eastern Iranian dialects, from earlier common Proto-Indo-European *g and *gʰ . During
1170-624: A self-aware Ukrainian nation would threaten the unity of the empire. In 1804 Ukrainian as a subject and language of instruction was banned from schools. In 1811, by order of the Russian government, the Kyiv-Mohyla Academy was closed. In 1847 the Brotherhood of St Cyril and Methodius was terminated. The same year Taras Shevchenko was arrested, exiled for ten years, and banned for political reasons from writing and painting. In 1862 Pavlo Chubynsky
1287-794: A service agreement that extended the aircraft's navigation directives to 3,600 flights and guaranteed the supply of spare parts, although it did not specify a date for normalization. In March 2018, Rostransnadzor suspended all flights of An-148 in Russia after the crash on 11 February 2018. In May 2018, Cubana de Aviación grounded its An-158 fleet after it received an order from the Cuban National Aviation Authority after "multiple and repeating failures (had) been found in complex systems, built by mechanical, hydraulic and electrical components, as well as computer performance algorithms", in addition to "evidence of design and manufacturing flaws, serious issues in flight control system, cracks in
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#17328549882571404-468: A similar design with conventional controls. This is partly due to the lower overall weight of the system components and partly because the natural stability of the aircraft can be relaxed (slightly for a transport aircraft; more for a maneuverable fighter), which means that the stability surfaces that are part of the aircraft structure can therefore be made smaller. These include the vertical and horizontal stabilizers (fin and tailplane ) that are (normally) at
1521-883: A variant name of the Little Russian language . In a private letter from 1854, Taras Shevchenko lauds "our splendid Ukrainian language". Valuyev's decree from 1863 derides the "Little Russian" language throughout, but also mentions "the so-called Ukrainian language" once. In Galicia, the earliest applications of the term Ukrainian to the language were in the hyphenated names Ukrainian-Ruthenian (1866, by Paulin Święcicki ) or Ruthenian-Ukrainian (1871, by Panteleimon Kulish and Ivan Puluj ), with non-hyphenated Ukrainian language appearing shortly thereafter (in 1878, by Mykhailo Drahomanov ). A following ban on Ukrainian books led to Alexander II 's secret Ems Ukaz , which prohibited publication and importation of most Ukrainian-language books, public performances and lectures, and even banned
1638-656: A wired protocol for the physical layer a wireless protocol is employed. In addition to reducing weight, implementing a wireless solution has the potential to reduce costs throughout an aircraft's life cycle. For example, many key failure points associated with wire and connectors will be eliminated thus hours spent troubleshooting wires and connectors will be reduced. Furthermore, engineering costs could potentially decrease because less time would be spent on designing wiring installations, late changes in an aircraft's design would be easier to manage, etc. A newer flight control system, called intelligent flight control system (IFCS),
1755-538: Is able to carry 68–85 passengers, depending on the configuration. The Antonov An-158 is a stretched fuselage version of the aircraft, accommodating up to 100 passengers. Following a crash in February 2018 , all An-148 and An-158 in Russia were grounded by the Russian Ministry of Transport . In addition, Cubana grounded its An-158 fleet as of May 2018 due to several technical issues with the aircraft. Until late 2018,
1872-517: Is also planned to offer a special 5,100 km (2,800 nmi; 3,200 mi) range, which would serve as a platform for the "E1", capable of non-stop Moscow-Vladivostok 6,995 km (3,777 nmi; 4,346 mi) services carrying 44 passengers. The An-148 aircraft is a high-wing monoplane with two turbofan jet engines mounted in pods under the wing. This arrangement protects the engines and wing structure against foreign object damage. A built-in autodiagnosis system, auxiliary power unit , and
1989-457: Is an extension of modern digital fly-by-wire flight control systems. The aim is to intelligently compensate for aircraft damage and failure during flight, such as automatically using engine thrust and other avionics to compensate for severe failures such as loss of hydraulics, loss of rudder, loss of ailerons, loss of an engine, etc. Several demonstrations were made on a flight simulator where a Cessna -trained small-aircraft pilot successfully landed
2106-625: Is based on the character of contemporary written sources, ultimately reflecting socio-historical developments, and he further subdivides the Middle period into three phases: Ukraine annually marks the Day of Ukrainian Writing and Language on 9 November, the Eastern Orthodox feast day of Nestor the Chronicler . The era of Kievan Rus' ( c. 880–1240) is the subject of some linguistic controversy, as
2223-468: Is made by Russian manufacturers. The An-148's list price is about $ 24–30 million. The main problem with the project has been increasing the aircraft's sluggish production rate. The then-independent AVIANT plant initially failed to satisfy to growing orders, leading to VASO's growing involvement in the aircraft's assembly. VASO announced in June 2017 that the two final Russian-assembled An-148s would be delivered, and
2340-465: Is more mutual intelligibility with Belarusian , and a closer lexical distance to West Slavic Polish and South Slavic Bulgarian . Ukrainian is a descendant of Old East Slavic , a language spoken in the medieval state of Kievan Rus' . In the Grand Duchy of Lithuania , the language developed into Ruthenian , where it became an official language, before a process of Polonization began in
2457-820: Is one of the East Slavic languages in the Indo-European languages family, and it is spoken primarily in Ukraine . It is the first (native) language of a large majority of Ukrainians . Written Ukrainian uses the Ukrainian alphabet , a variant of the Cyrillic script . The standard language is studied by the National Academy of Sciences of Ukraine and Potebnia Institute of Linguistics . Comparisons are often made between Ukrainian and Russian , another East Slavic language, yet there
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#17328549882572574-640: Is referred to as "Old Ukrainian", but elsewhere, and in contemporary sources, is known as the Ruthenian language, and from the end of the 18th century to the present what in Ukraine is known as "Modern Ukrainian", but elsewhere is known as just Ukrainian. Fly-by-wire Fly-by-wire ( FBW ) is a system that replaces the conventional manual flight controls of an aircraft with an electronic interface. The movements of flight controls are converted to electronic signals, and flight control computers determine how to move
2691-432: Is the first production aircraft in the world to be equipped with such a flight control system. Having eliminated the mechanical transmission circuits in fly-by-wire flight control systems, the next step is to eliminate the bulky and heavy hydraulic circuits. The hydraulic circuit is replaced by an electrical power circuit. The power circuits power electrical or self-contained electrohydraulic actuators that are controlled by
2808-486: Is the main model of the An-148. It seats 70 passengers at 864 mm (34.0 in) or up to 80 passengers at 762 mm (30.0 in) pitch in a one-class 2+3 seating layout. The aircraft is also configurable in a multiple-class layout which can carry fewer passengers, typically with four abreast business class. In April 2005, the Ilyushin Finance Leasing Company ordered the first series of An-148 for
2925-629: Is used in the Lockheed Martin F-35 Lightning II and in Airbus A380 backup flight controls. The Boeing 787 and Airbus A350 also incorporate electrically powered backup flight controls which remain operational even in the event of a total loss of hydraulic power. Wiring adds a considerable amount of weight to an aircraft; therefore, researchers are exploring implementing fly-by-wireless solutions. Fly-by-wireless systems are very similar to fly-by-wire systems, however, instead of using
3042-554: The Airbus A320 , Airbus flight-envelope control systems always retain ultimate flight control when flying under normal law and will not permit pilots to violate aircraft performance limits unless they choose to fly under alternate law. This strategy has been continued on subsequent Airbus airliners. However, in the event of multiple failures of redundant computers, the A320 does have a mechanical back-up system for its pitch trim and its rudder,
3159-705: The Airbus A340 has a purely electrical (not electronic) back-up rudder control system and beginning with the A380, all flight-control systems have back-up systems that are purely electrical through the use of a "three-axis Backup Control Module" (BCM). Boeing airliners, such as the Boeing 777 , allow the pilots to completely override the computerized flight control system, permitting the aircraft to be flown outside of its usual flight control envelope. The advent of FADEC (Full Authority Digital Engine Control) engines permits operation of
3276-462: The Boeing 737 , the main landing gear rotates into the belly of the aircraft when in flight, with partial doors covering the legs, and the sides of the tires remaining exposed. Built-in entrance stairs enable boarding and disembarking the aircraft without extra ground equipment. The manufacturer claims high fuel efficiency of the Motor Sich D-436-148 engines. The An-148-100 regional aircraft
3393-719: The Latin language. Much of the influence of Poland on the development of the Ukrainian language has been attributed to this period and is reflected in multiple words and constructions used in everyday Ukrainian speech that were taken from Polish or Latin. Examples of Polish words adopted from this period include zavzhdy (always; taken from old Polish word zawżdy ) and obitsiaty (to promise; taken from Polish obiecać ) and from Latin (via Polish) raptom (suddenly) and meta (aim or goal). Significant contact with Tatars and Turks resulted in many Turkic words, particularly those involving military matters and steppe industry, being adopted into
3510-677: The Lockheed F-117 Nighthawk and the Northrop Grumman B-2 Spirit flying wing to fly in usable and safe manners. The United States Federal Aviation Administration (FAA) has adopted the RTCA / DO-178C , titled "Software Considerations in Airborne Systems and Equipment Certification", as the certification standard for aviation software. Any safety-critical component in a digital fly-by-wire system including applications of
3627-557: The Novgorod Republic did not call themselves Rus ' until the 14th century; earlier Novgorodians reserved the term Rus ' for the Kiev , Pereyaslavl and Chernigov principalities. At the same time as evidenced by contemporary chronicles, the ruling princes and kings of Galicia–Volhynia and Kiev called themselves "people of Rus ' " (in foreign sources called " Ruthenians "), and Galicia–Volhynia has alternately been called
Antonov An-148 - Misplaced Pages Continue
3744-613: The Polish–Lithuanian Commonwealth . By the 18th century, Ruthenian diverged into regional variants, and the modern Ukrainian language developed in the territory of present-day Ukraine. Russification saw the Ukrainian language banned as a subject from schools and as a language of instruction in the Russian Empire , and continued in various ways in the Soviet Union . Even so, the language continued to see use throughout
3861-605: The State Aviation Administration of Ukraine . The An-148 is manufactured by the Ukrainian Kyiv AVIANT plant (now Antonov Serial Production Plant) and Russia's Voronezh Aircraft Production Association (VASO). On 28 June 2009, the first serially produced An-148, manufactured at VASO in Voronezh , took to the skies. Although numerous companies are involved in the project, at least 70% of the aircraft's hardware
3978-477: The actuators at each control surface to provide the ordered response. Implementations either use mechanical flight control backup systems or else are fully electronic. Improved fully fly-by-wire systems interpret the pilot's control inputs as a desired outcome and calculate the control surface positions required to achieve that outcome; this results in various combinations of rudder , elevator , aileron , flaps and engine controls in different situations using
4095-399: The law of Ukraine "On protecting the functioning of the Ukrainian language as the state language" was approved by the parliament, formalizing rules governing the usage of the language and introducing penalties for violations. The literary Ukrainian language, which was preceded by Old East Slavic literature, may be subdivided into two stages: during the 12th to 18th centuries what in Ukraine
4212-530: The pitch, roll and yaw axes . Any movement (from straight and level flight for example) results in signals to the computer, which can automatically move control actuators to stabilize the aircraft. While traditional mechanical or hydraulic control systems usually fail gradually, the loss of all flight control computers immediately renders the aircraft uncontrollable. For this reason, most fly-by-wire systems incorporate either redundant computers (triplex, quadruplex etc.), some kind of mechanical or hydraulic backup or
4329-425: The 11th–12th century, but started becoming more similar to them around the 13th–15th centuries. The modern Russian language hence developed from the fusion of this Novgorod dialect and the common dialect spoken by the other Kievan Rus', whereas the modern Ukrainian and Belarusian languages developed from dialects which did not differ from each other in a significant way. Ukrainian linguist Stepan Smal-Stotsky denies
4446-451: The 13th century, eastern parts of Rus (including Moscow) came under Tatar rule until their unification under the Tsardom of Muscovy , whereas the south-western areas (including Kyiv ) were incorporated into the Grand Duchy of Lithuania . For the following four centuries, the languages of the two regions evolved in relative isolation from each other. Direct written evidence of the existence of
4563-666: The 13th century, when German settlers were invited to Ukraine by the princes of the Kingdom of Ruthenia, German words began to appear in the language spoken in Ukraine. Their influence would continue under Poland not only through German colonists but also through the Yiddish-speaking Jews. Often such words involve trade or handicrafts. Examples of words of German or Yiddish origin spoken in Ukraine include dakh ("roof"), rura ("pipe"), rynok ("market"), kushnir ("furrier"), and majster ("master" or "craftsman"). In
4680-498: The A330/A340 family, fuel is transferred between the main (wing and center fuselage) tanks and a fuel tank in the horizontal stabilizer, to optimize the aircraft's center of gravity during cruise flight. The fuel management controls keep the aircraft's center of gravity accurately trimmed with fuel weight, rather than drag-inducing aerodynamic trims in the elevators. Fly-by-optics is sometimes used instead of fly-by-wire because it offers
4797-613: The Antonov An-148 aircraft was also being produced in Russia by Voronezh Aircraft Production Association ; however, due to the souring political relationship between Ukraine and Russia, production in Russia was discontinued. The last Russian-built An-148 was completed in October 2018. The beginning of the An-148 project dates to the early 1990s, when work on the Antonov An-74 passenger modification started, headed by Petro Balabuev. In 2001,
Antonov An-148 - Misplaced Pages Continue
4914-589: The Cossack motherland, Ukrajina , as a self-appellation for the nation of Ukrainians, and Ukrajins'ka mova for the language. Many writers published works in the Romantic tradition of Europe demonstrating that Ukrainian was not merely a language of the village but suitable for literary pursuits. However, in the Russian Empire expressions of Ukrainian culture and especially language were repeatedly persecuted for fear that
5031-555: The Krasair airline. Lease agreement calls for ten aircraft with an option for five units valued at $ 270 million. On 2 June 2009, the first An-148 entered commercial service with the Ukrainian carrier Aerosvit . The first passenger flight was from Kharkiv to Kyiv ; the aircraft had the civilian registration UR-NTA . By November 2009, Aerosvit was operating the An-148 on the Kyiv– Odesa and Simferopol – Lviv routes, performing two flights
5148-544: The Orthodox church spoke Ruthenian. The 1654 Pereiaslav Agreement between Cossack Hetmanate and Alexis of Russia divided Ukraine between the Polish–Lithuanian Commonwealth and the Tsardom of Russia. During the following century, both monarchies became increasingly intolerant of Ukrainian own cultural and political aspirations. Ukrainians found themselves in a colonial situation. The Russian centre adopted
5265-559: The Polish nobility. Many Ukrainian nobles learned the Polish language and converted to Catholicism during that period in order to maintain their lofty aristocratic position. Lower classes were less affected because literacy was common only in the upper class and clergy. The latter were also under significant Polish pressure after the Union with the Catholic Church . Most of the educational system
5382-530: The Principality or Kingdom of Ruthenia. Also according to Andrey Zaliznyak, the Novgorodian dialect differed significantly from that of other dialects of Kievan Rus during the 11th–12th century, but started becoming more similar to them around 13th–15th centuries. The modern Russian language hence developed from the fusion of this Novgorodian dialect and the common dialect spoken by the other Kievan Rus, whereas
5499-552: The Russian Empire. According to the Imperial census's terminology, the Russian language ( Русскій ) was subdivided into Ukrainian (Малорусскій, ' Little Russian '), what is known as Russian today (Великорусскій, ' Great Russian '), and Belarusian (Бѣлорусскій, 'White Russian'). The following table shows the distribution of settlement by native language ( "по родному языку" ) in 1897 in Russian Empire governorates ( guberniyas ) that had more than 100,000 Ukrainian speakers. Although in
5616-460: The Soviet Union and a special term, "a language of inter-ethnic communication", was coined to denote its status. After the death of Stalin (1953), a general policy of relaxing the language policies of the past was implemented (1958 to 1963). The Khrushchev era which followed saw a policy of relatively lenient concessions to development of the languages at the local and republic level, though its results in Ukraine did not go nearly as far as those of
5733-509: The Soviet policy of Ukrainianization in the 1920s. Journals and encyclopedic publications advanced in the Ukrainian language during the Khrushchev era, as well as transfer of Crimea under Ukrainian SSR jurisdiction. Yet, the 1958 school reform that allowed parents to choose the language of primary instruction for their children, unpopular among the circles of the national intelligentsia in parts of
5850-543: The USSR, meant that non-Russian languages would slowly give way to Russian in light of the pressures of survival and advancement. The gains of the past, already largely reversed by the Stalin era, were offset by the liberal attitude towards the requirement to study the local languages (the requirement to study Russian remained). Parents were usually free to choose the language of study of their children (except in few areas where attending
5967-564: The Ukrainian language dates to the late 16th century. By the 16th century, a peculiar official language formed: a mixture of the liturgical standardised language of Old Church Slavonic , Ruthenian and Polish . The influence of the latter gradually increased relative to the former two, as the nobility and rural large-landowning class, known as the szlachta , was largely Polish-speaking. Documents soon took on many Polish characteristics superimposed on Ruthenian phonetics. Polish–Lithuanian rule and education also involved significant exposure to
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#17328549882576084-470: The Ukrainian language held the formal position of the principal local language in the Ukrainian SSR . However, practice was often a different story: Ukrainian always had to compete with Russian, and the attitudes of the Soviet leadership towards Ukrainian varied from encouragement and tolerance to de facto banishment. Officially, there was no state language in the Soviet Union until the very end when it
6201-465: The Ukrainian language. Examples include torba (bag) and tyutyun (tobacco). Because of the substantial number of loanwords from Polish, German, Czech and Latin, early modern vernacular Ukrainian ( prosta mova , " simple speech ") had more lexical similarity with West Slavic languages than with Russian or Church Slavonic. By the mid-17th century, the linguistic divergence between the Ukrainian and Russian languages had become so significant that there
6318-409: The Ukrainian school might have required a long daily commute) and they often chose Russian, which reinforced the resulting Russification. In this sense, some analysts argue that it was not the "oppression" or "persecution", but rather the lack of protection against the expansion of Russian language that contributed to the relative decline of Ukrainian in the 1970s and 1980s. According to this view, it
6435-422: The aircraft by systems of pulleys, cranks, tension cables and hydraulic pipes. Both systems often require redundant backup to deal with failures, which increases weight. Both have limited ability to compensate for changing aerodynamic conditions. Dangerous characteristics such as stalling , spinning and pilot-induced oscillation (PIO), which depend mainly on the stability and structure of the aircraft rather than
6552-517: The aircraft experienced some reliability problems. There were some technical problems with the aircraft, and pilot training could not be ramped up fast enough, leading to pilot shortages. However, by 2011 the situation had improved. On 15 February 2010, the An-148 started international flights to the European Union (Poland) with the Aerosvit airline. On 18 April 2013, the first serial An-158 version
6669-409: The aircraft from being handled dangerously by preventing pilots from exceeding preset limits on the aircraft's flight-control envelope, such as those that prevent stalls and spins, and which limit airspeeds and g forces on the airplane. Software can also be included that stabilize the flight-control inputs to avoid pilot-induced oscillations . Since the flight-control computers continuously feedback
6786-450: The aircraft's equations of motion to determine the appropriate command signals for the flight controls to execute the intentions of the pilot. The programming of the digital computers enable flight envelope protection . These protections are tailored to an aircraft's handling characteristics to stay within aerodynamic and structural limitations of the aircraft. For example, the computer in flight envelope protection mode can try to prevent
6903-589: The appropriate "feel" forces on the manual controls. This was used in Concorde , the first production fly-by-wire airliner. A digital fly-by-wire flight control system can be extended from its analog counterpart. Digital signal processing can receive and interpret input from multiple sensors simultaneously (such as the altimeters and the pitot tubes ) and adjust the controls in real time. The computers sense position and force inputs from pilot controls and aircraft sensors. They then solve differential equations related to
7020-474: The automatic-electronic system, which flared the aircraft, when it was close to the ground. In 1941, Karl Otto Altvater, who was an engineer at Siemens , developed and tested the first fly-by-wire system for the Heinkel He 111 , in which the aircraft was fully controlled by electronic impulses. The first non-experimental aircraft that was designed and flown (in 1958) with a fly-by-wire flight control system
7137-513: The case of the Tornado this allows rudimentary control of the stabilators only for pitch and roll axis movements. Servo-electrically operated control surfaces were first tested in the 1930s on the Soviet Tupolev ANT-20 . Long runs of mechanical and hydraulic connections were replaced with wires and electric servos. In 1934, Karl Otto Altvater [ de ] filed a patent about
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#17328549882577254-407: The chancellery and gradually evolved into the Ruthenian language. Polish rule, which came later, was accompanied by a more assimilationist policy. By the 1569 Union of Lublin that formed the Polish–Lithuanian Commonwealth, a significant part of Ukrainian territory was moved from Lithuanian rule to Polish administration, resulting in cultural Polonization and visible attempts to colonize Ukraine by
7371-447: The combined system is designed to exclude the results from that computer in deciding the appropriate actions for the flight controls. Depending on specific system details there may be the potential to reboot an aberrant flight control computer, or to reincorporate its inputs if they return to agreement. Complex logic exists to deal with multiple failures, which may prompt the system to revert to simpler back-up modes. In addition, most of
7488-462: The complexity, fragility and weight of the mechanical circuit of the hydromechanical or electromechanical flight control systems – each being replaced with electronic circuits. The control mechanisms in the cockpit now operate signal transducers, which in turn generate the appropriate commands. These are next processed by an electronic controller—either an analog one, or (more modernly) a digital one. Aircraft and spacecraft autopilots are now part of
7605-430: The control surface until it has moved to where the flight control computer commanded it to. The controllers measure the position of the flight control surface with sensors such as LVDTs . Fly-by-wire control systems allow aircraft computers to perform tasks without pilot input. Automatic stability systems operate in this way. Gyroscopes and sensors such as accelerometers are mounted in an aircraft to sense rotation on
7722-541: The control system itself, are dependent on the pilot's actions. The term "fly-by-wire" implies a purely electrically signaled control system. It is used in the general sense of computer-configured controls, where a computer system is interposed between the operator and the final control actuators or surfaces. This modifies the manual inputs of the pilot in accordance with control parameters. Side-sticks or conventional flight control yokes can be used to fly fly-by-wire aircraft. A fly-by-wire aircraft can be lighter than
7839-571: The country, and remained particularly strong in Western Ukraine . Specific developments that led to a gradual change of the Old East Slavic vowel system into the system found in modern Ukrainian began approximately in the 12th/13th century (that is, still at the time of the Kievan Rus') with a lengthening and raising of the Old East Slavic mid vowels e and o when followed by a consonant and
7956-433: The digital flight control computers. All benefits of digital fly-by-wire are retained since the power-by-wire components are strictly complementary to the fly-by-wire components. The biggest benefits are weight savings, the possibility of redundant power circuits and tighter integration between the aircraft flight control systems and its avionics systems. The absence of hydraulics greatly reduces maintenance costs. This system
8073-407: The early digital fly-by-wire aircraft also had an analog electrical, mechanical, or hydraulic back-up flight control system. The Space Shuttle had, in addition to its redundant set of four digital computers running its primary flight-control software, a fifth backup computer running a separately developed, reduced-function, software flight-control system – one that could be commanded to take over in
8190-580: The early to mid-60s. The program was curtailed when the air-frame ran out of flight time. In 1972, the first digital fly-by-wire fixed-wing aircraft without a mechanical backup to take to the air was an F-8 Crusader , which had been modified electronically by NASA of the United States as a test aircraft ; the F-8 used the Apollo guidance, navigation and control hardware . The Airbus A320 began service in 1988 as
8307-430: The electronic controller. The hydraulic circuits are similar except that mechanical servo valves are replaced with electrically controlled servo valves, operated by the electronic controller. This is the simplest and earliest configuration of an analog fly-by-wire flight control system. In this configuration, the flight control systems must simulate "feel". The electronic controller controls electrical devices that provide
8424-449: The environment, pilot's workloads can be reduced. This also enables military aircraft with relaxed stability . The primary benefit for such aircraft is more maneuverability during combat and training flights, and the so-called "carefree handling" because stalling, spinning and other undesirable performances are prevented automatically by the computers. Digital flight control systems (DFCS) enable inherently unstable combat aircraft, such as
8541-601: The event that a fault ever affected all of the other four computers. This backup system served to reduce the risk of total flight control system failure ever happening because of a general-purpose flight software fault that had escaped notice in the other four computers. For airliners, flight-control redundancy improves their safety, but fly-by-wire control systems, which are physically lighter and have lower maintenance demands than conventional controls also improve economy, both in terms of cost of ownership and for in-flight economy. In certain designs with limited relaxed stability in
8658-407: The existence of a common Old East Slavic language at any time in the past. Similar points of view were shared by Yevhen Tymchenko , Vsevolod Hantsov , Olena Kurylo , Ivan Ohienko and others. According to this theory, the dialects of East Slavic tribes evolved gradually from the common Proto-Slavic language without any intermediate stages during the 6th through 9th centuries. The Ukrainian language
8775-507: The first mass-produced airliner with digital fly-by-wire controls. As of June 2024, over 11,000 A320 family aircraft, variants included, are operational around the world, making it one of the best-selling commercial jets. Boeing chose fly-by-wire flight controls for the 777 in 1994, departing from traditional cable and pulley systems. In addition to overseeing the aircraft's flight control, the FBW offered " envelope protection ", which guaranteed that
8892-423: The first months of 2017, 38 were cancelled and 36 suffered significant delays. Yoanka Acosta, head of Cubana's commercial division, explained that the planes were leased from Ukraine but spare parts were sourced from Russia , so the state of conflict between the two countries had affected the supply of parts, making maintenance difficult. In late April, however, representatives from Antonov and Cubana met and signed
9009-610: The first three prototypes was begun at AVIANT. On 17 December 2004, the first prototype completed its maiden flight. The second prototype joined the testing programme in April 2005. During the certification programme, the two prototypes performed about 600 flights in total. On 26 February 2007, the aircraft, its D-436-148 engine and the AI-450-МS auxiliary power unit were certified by the Interstate Aviation Committee of Russia and
9126-456: The flight control computer to make the aircraft perform a certain action, such as pitch the aircraft up, or roll to one side, by moving the control column or sidestick . The flight control computer then calculates what control surface movements will cause the plane to perform that action and issues those commands to the electronic controllers for each surface. The controllers at each surface receive these commands and then move actuators attached to
9243-412: The flight control systems and autothrottles for the engines to be fully integrated. On modern military aircraft other systems such as autostabilization, navigation, radar and weapons system are all integrated with the flight control systems. FADEC allows maximum performance to be extracted from the aircraft without fear of engine misoperation, aircraft damage or high pilot workloads. In the civil field,
9360-532: The integration increases flight safety and economy. Airbus fly-by-wire aircraft are protected from dangerous situations such as low-speed stall or overstressing by flight envelope protection . As a result, in such conditions, the flight control systems commands the engines to increase thrust without pilot intervention. In economy cruise modes, the flight control systems adjust the throttles and fuel tank selections precisely. FADEC reduces rudder drag needed to compensate for sideways flight from unbalanced engine thrust. On
9477-519: The lack of natural stability. Pre-flight safety checks of a fly-by-wire system are often performed using built-in test equipment (BITE). A number of control movement steps can be automatically performed, reducing workload of the pilot or groundcrew and speeding up flight-checks. Some aircraft, the Panavia Tornado for example, retain a very basic hydro-mechanical backup system for limited flight control capability on losing electrical power; in
9594-417: The language of much of the literature was purely or heavily Old Church Slavonic . Some theorists see an early Ukrainian stage in language development here, calling it Old Ruthenian; others term this era Old East Slavic . Russian theorists tend to amalgamate Rus' to the modern nation of Russia, and call this linguistic era Old Russian. However, according to Russian linguist Andrey Zaliznyak (2012), people from
9711-440: The laws of aeronautics and computer operating systems will need to be certified to DO-178C Level A or B, depending on the class of aircraft, which is applicable for preventing potential catastrophic failures. Nevertheless, the top concern for computerized, digital, fly-by-wire systems is reliability, even more so than for analog electronic control systems. This is because the digital computers that are running software are often
9828-528: The merger of the Old East Slavic vowel phonemes и /i/ and ы /ɨ/ into the specifically Ukrainian phoneme /ɪ ~ e/, spelled with и (in the 13th/14th centuries), and the fricativisation of the Old East Slavic consonant г /g/, probably first to /ɣ/ (in the 13th century), with /ɦ/ as a reflex in Modern Ukrainian, did not happen in Russian. Only the fricativisation of Old East Slavic г /g/ occurred in Belarusian, where
9945-456: The modern Ukrainian and Belarusian languages developed from the dialects which did not differ from each other in a significant way. After the fall of the Kingdom of Ruthenia, Ukrainians mainly fell under the rule of Lithuania and then Poland . Local autonomy of both rule and language was a marked feature of Lithuanian rule. In the Grand Duchy of Lithuania, Old East Slavic became the language of
10062-501: The name Little Russia for Ukraine and Little Russian for the language, an expression that originated in Byzantine Greek and may originally have meant "old, original, fundamental Russia", and had been in use since the 14th century. Ukrainian high culture went into a long period of steady decline. The Kyiv-Mohyla Academy was taken over by the Russian Empire. Most of the remaining Ukrainian schools also switched to Polish or Russian in
10179-459: The native language for the majority in the nation on the eve of Ukrainian independence, a significant share of ethnic Ukrainians were russified. In Donetsk there were no Ukrainian language schools and in Kyiv only a quarter of children went to Ukrainian language schools. The Russian language was the dominant vehicle, not just of government function, but of the media, commerce, and modernity itself. This
10296-703: The only control path between the pilot and aircraft's flight control surfaces . If the computer software crashes for any reason, the pilot may be unable to control an aircraft. Hence virtually all fly-by-wire flight control systems are either triply or quadruply redundant in their computers and electronics . These have three or four flight-control computers operating in parallel and three or four separate data buses connecting them with each control surface. The multiple redundant flight control computers continuously monitor each other's output. If one computer begins to give aberrant results for any reason, potentially including software or hardware failures or flawed input data, then
10413-600: The pilot. The first electronic fly-by-wire testbed operated by the U.S. Air Force was a Boeing B-47E Stratojet (Ser. No. 53-2280) The first pure electronic fly-by-wire aircraft with no mechanical or hydraulic backup was the Apollo Lunar Landing Training Vehicle (LLTV), first flown in 1968. This was preceded in 1964 by the Lunar Landing Research Vehicle (LLRV) which pioneered fly-by-wire flight with no mechanical backup. Control
10530-448: The pitch axis, for example the Boeing 777, the flight control system may allow the aircraft to fly at a more aerodynamically efficient angle of attack than a conventionally stable design. Modern airliners also commonly feature computerized Full-Authority Digital Engine Control systems ( FADECs ) that control their engines, air inlets, fuel storage and distribution system, in a similar fashion to
10647-425: The population said Ukrainian was their native language. Until the 1920s the urban population in Ukraine grew faster than the number of Ukrainian speakers. This implies that there was a (relative) decline in the use of Ukrainian language. For example, in Kyiv, the number of people stating that Ukrainian was their native language declined from 30.3% in 1874 to 16.6% in 1917. During the seven-decade-long Soviet era ,
10764-510: The present-day reflex is /ɣ/. Ahatanhel Krymsky and Aleksey Shakhmatov assumed the existence of the common spoken language of Eastern Slavs only in prehistoric times. According to their point of view, the diversification of the Old East Slavic language took place in the 8th or early 9th century. Russian linguist Andrey Zaliznyak stated that the Old Novgorod dialect differed significantly from that of other dialects of Kievan Rus' during
10881-573: The printing of Ukrainian texts accompanying musical scores. A period of leniency after 1905 was followed by another strict ban in 1914, which also affected Russian-occupied Galicia. For much of the 19th century the Austrian authorities demonstrated some preference for Polish culture, but the Ukrainians were relatively free to partake in their own cultural pursuits in Halychyna and Bukovina , where Ukrainian
10998-482: The project was renamed An-148. The An-74 fuselage was extended and the new aircraft's wing design was created from scratch. The developers initially used Motor Sich D-436-148 engines. Other variants with Western-made engines with thrust of 58.86–78.48 kN (6,002–8,003 kgf; 13,230–17,640 lbf) (such as the General Electric CF34 or Rolls-Royce BR700 ) are being considered. In 2002, production of
11115-608: The project would not see further development. In early 2018, Ukraine affirmatively banned sales of Progress D-436 aircraft engines to Russia as a consequence of the Annexation of Crimea by the Russian Federation . For Siberian operators, Antonov plans a model with a higher gross weight and additional fuel capacity in the center tank, extending the range with 75 passengers from 2,198 km (1,187 nmi; 1,366 mi) to 3,598 km (1,943 nmi; 2,236 mi). An "E" variant
11232-491: The rear of the fuselage . If these structures can be reduced in size, airframe weight is reduced. The advantages of fly-by-wire controls were first exploited by the military and then in the commercial airline market. The Airbus series of airliners used full-authority fly-by-wire controls beginning with their A320 series, see A320 flight control (though some limited fly-by-wire functions existed on A310 aircraft). Boeing followed with their 777 and later designs. A pilot commands
11349-562: The rural regions of the Ukrainian provinces, 80% of the inhabitants said that Ukrainian was their native language in the Census of 1897 (for which the results are given above), in the urban regions only 32.5% of the population claimed Ukrainian as their native language. For example, in Odesa (then part of the Russian Empire), at the time the largest city in the territory of current Ukraine, only 5.6% of
11466-661: The sixteenth and first half of the 17th century, when Ukraine was part of the Polish–Lithuanian Commonwealth, albeit in spite of being part of the PLC, not as a result. Among many schools established in that time, the Kyiv-Mohyla Collegium (the predecessor of the modern Kyiv-Mohyla Academy ), founded by the Orthodox Metropolitan Peter Mogila , was the most important. At that time languages were associated more with religions: Catholics spoke Polish, and members of
11583-688: The structure and engine temperature increase above normal parameters". On 18 September 2023, the Ukrainian military intelligence claimed a raid against Chkalovsky Air Base , near Moscow, occurred. During which they claimed to have damaged an An-148. The following sheet depicts all known orders and deliveries of An-148 aircraft. However it is unclear if all of them are currently operational: Related development Aircraft of comparable role, configuration, and era [REDACTED] Media related to Antonov An-148 at Wikimedia Commons Ukrainian language Ukrainian ( українська мова , ukrainska mova , IPA: [ʊkrɐˈjinʲsʲkɐ ˈmɔʋɐ] )
11700-493: The system would step in to avoid accidental mishandling, stalls, or excessive structural stress on the aircraft. The 777 used ARINC 629 buses to connect primary flight computers (PFCs) with actuator-control electronics units (ACEs). Every PFC housed three 32-bit microprocessors, including a Motorola 68040 , an Intel 80486 , and an AMD 29050 , all programmed in Ada programming language. All fly-by-wire flight control systems eliminate
11817-462: The term native language may not necessarily associate with the language they use more frequently. The overwhelming majority of ethnic Ukrainians consider the Ukrainian language native , including those who often speak Russian. According to the official 2001 census data, 92.3% of Kyiv region population responded "Ukrainian" to the native language ( ridna mova ) census question, compared with 88.4% in 1989, and 7.2% responded "Russian". In 2019,
11934-558: The territories controlled by these respective countries, which was followed by a new wave of Polonization and Russification of the native nobility. Gradually the official language of Ukrainian provinces under Poland was changed to Polish, while the upper classes in the Russian part of Ukraine used Russian. During the 19th century, a revival of Ukrainian self-identification manifested in the literary classes of both Russian-Empire Dnieper Ukraine and Austrian Galicia . The Brotherhood of Sts Cyril and Methodius in Kyiv applied an old word for
12051-516: The use of Ukrainian. The educational system in Ukraine has been transformed over the first decade of independence from a system that is partly Ukrainian to one that is overwhelmingly so. The government has also mandated a progressively increased role for Ukrainian in the media and commerce. In the 2001 census , 67.5% of the country's population named Ukrainian as their native language (a 2.8% increase from 1989), while 29.6% named Russian (a 3.2% decrease). For many Ukrainians (of various ethnic origins),
12168-573: The way that FBW controls the flight control surfaces. This allows the engine output to be continually varied for the most efficient usage possible. The second generation Embraer E-Jet family gained a 1.5% efficiency improvement over the first generation from the fly-by-wire system, which enabled a reduction from 280 ft.² to 250 ft.² for the horizontal stabilizer on the E190/195 variants. Airbus and Boeing differ in their approaches to implementing fly-by-wire systems in commercial aircraft. Since
12285-429: The wing configuration allow the An-148 to be used at poorly equipped airfields. Flight and navigation equipment features five 15 by 20 cm (5.9 by 7.9 in) liquid crystal display panels built by Russia's Aviapribor and a fly-by-wire system, which enables the An-148 aircraft to operate day and night, under instrument flight rules and visual flight rules weather conditions on high-density air routes. Similar to
12402-575: Was a need for translators during negotiations for the Treaty of Pereyaslav , between Bohdan Khmelnytsky , head of the Zaporozhian Host , and the Russian state. By the 18th century, Ruthenian had diverged into regional variants, developing into the modern Belarusian , Rusyn , and Ukrainian languages. The accepted chronology of Ukrainian divides the language into Old Ukrainian, Middle Ukrainian, and Modern Ukrainian. Shevelov explains that much of this
12519-810: Was delivered to the Cuban flagship airline Cubana de Aviación . According to Antonov, Cubana additionally ordered two more aircraft, while other sources report this order to be for ten aircraft. On 28 April 2013, Ukraine's Antonov aircraft maker handed over a third An-158 passenger airliner to Cuba and signed a contract for the delivery of three more. In April 2016, Indian company Reliance defense limited and Antonov entered into an agreement to construct an aircraft based on An 148/ An 158 for defense and commercial purposes. In April 2017, Cubana de Aviación suspended its flights between Havana and Guantánamo due to "technical problems" with its An-158 fleet. The route from Havana to Holguín also had problems: of 116 planned flights in
12636-548: Was exiled for seven years to Arkhangelsk . The Ukrainian magazine Osnova was discontinued. In 1863, the tsarist interior minister Pyotr Valuyev proclaimed in his decree that "there never has been, is not, and never can be a separate Little Russian language". Although the name of Ukraine is known since 1187, it was not applied to the language until the mid-19th century. The linguonym Ukrainian language appears in Yakub Holovatsky 's book from 1849, listed there as
12753-448: Was formed by convergence of tribal dialects, mostly due to an intensive migration of the population within the territory of today's Ukraine in later historical periods. This point of view was also supported by George Shevelov 's phonological studies, which argue that specific features were already recognizable in the southern dialects of Old East Slavic (seen as ancestors to Ukrainian) as far back as these varieties can be documented. As
12870-407: Was gradually Polonized. In Ruthenia, the language of administrative documents gradually shifted towards Polish. Polish has had heavy influences on Ukrainian (particularly in Western Ukraine ). The southwestern Ukrainian dialects are transitional to Polish. As the Ukrainian language developed further, some borrowings from Tatar and Turkish occurred. Ukrainian culture and language flourished in
12987-554: Was inevitable that successful careers required a good command of Russian, while knowledge of Ukrainian was not vital, so it was common for Ukrainian parents to send their children to Russian-language schools, even though Ukrainian-language schools were usually available. The number of students in Russian-language in Ukraine schools was constantly increasing, from 14 percent in 1939 to more than 30 percent in 1962. The Communist Party leader from 1963 to 1972, Petro Shelest , pursued
13104-482: Was lessened only slightly after 1985. The management of dissent by the local Ukrainian Communist Party was more fierce and thorough than in other parts of the Soviet Union. As a result, at the start of the Mikhail Gorbachev reforms perebudova and hlasnist’ (Ukrainian for perestroika and glasnost ), Ukraine under Shcherbytsky was slower to liberalize than Russia itself. Although Ukrainian still remained
13221-537: Was proclaimed in 1990 that Russian language was the all-Union state language and that the constituent republics had rights to declare additional state languages within their jurisdictions. Still it was implicitly understood in the hopes of minority nations that Ukrainian would be used in the Ukrainian SSR, Uzbek would be used in the Uzbek SSR , and so on. However, Russian was used as the lingua franca in all parts of
13338-400: Was substantially less the case for western Ukraine, which escaped the artificial famine , Great Purge , and most of Stalinism . And this region became the center of a hearty, if only partial, renaissance of the Ukrainian language during independence. Since 1991, Ukrainian has been the official state language in Ukraine, and the state administration implemented government policies to broaden
13455-595: Was the Avro Canada CF-105 Arrow , a feat not repeated with a production aircraft (though the Arrow was cancelled with five built) until Concorde in 1969, which became the first fly-by-wire airliner. This system also included solid-state components and system redundancy, was designed to be integrated with a computerised navigation and automatic search and track radar, was flyable from ground control with data uplink and downlink, and provided artificial feel (feedback) to
13572-728: Was through a digital computer with three analog redundant channels. In the USSR, the Sukhoi T-4 also flew. At about the same time in the United Kingdom a trainer variant of the British Hawker Hunter fighter was modified at the British Royal Aircraft Establishment with fly-by-wire flight controls for the right-seat pilot. In the UK the two seater Avro 707 C was flown with a Fairey system with mechanical backup in
13689-532: Was widely used in education and official documents. The suppression by Russia hampered the literary development of the Ukrainian language in Dnipro Ukraine, but there was a constant exchange with Halychyna, and many works were published under Austria and smuggled to the east. By the time of the Russian Revolution of 1917 and the collapse of Austro-Hungary in 1918, Ukrainians were ready to openly develop
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