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IAI Lavi
The IAI Lavi (, "lion") is a single-engined fourth-generation jet fighter, fourth-generation multirole jet fighter developed in Israel, by Israel Aircraft Industries (IAI), during the 1980s. The decision to develop the Lavi was controversial, both with the Israeli public, due to the enormous associated costs, and particularly with the U.S. government due to competition with American jets on the export market. By 1984 Israel, with a population of 4 million, had amongst the world's highest military expenditure as a proportion of GDP, at approximately 18.9%, which was considered unsustainable. These issues contributed to the ultimate cancellation of the aircraft, by the Israeli government, during the flight-test phase of development in August 1987. The Israeli cabinet's late-stage cancellation of the program, by a 12–11 vote, continued to arouse controversy and bitterness in Israel for decades, with Moshe Arens, the main political figure behind the Lavi project, stating in 2013 tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Israel Aircraft Industries
Israel Aerospace Industries (IAI; ), is Israel's major aerospace and aviation manufacturer, producing aerial and astronautic systems for both military and civilian usage. It has 14,000 employees as of 2021. IAI is state-owned by the government of Israel. IAI designs, develops, produces and maintains civil aircraft, drones, fighter aircraft, missile, avionics, and space-based systems. IAI's main focus is engineering, aviation and high-tech electronics, though it also manufactures military systems for ground and naval forces. Many of these products are centered on the core needs of the Israel Defense Forces (IDF). Other offerings are marketed to numerous foreign militaries. History Israel Aerospace Industries was founded in 1953 as Bedek Aviation Company under the initiative of Shimon Peres, then director general of the Ministry of Defense, in order to maintain Israel Defense Forces aircraft. The company originally had 70 employees and recruited American born aviation expert ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saudi Arabia
Saudi Arabia, officially the Kingdom of Saudi Arabia (KSA), is a country in West Asia. Located in the centre of the Middle East, it covers the bulk of the Arabian Peninsula and has a land area of about , making it the List of Asian countries by area, fifth-largest country in Asia, the largest in the Middle East, and the List of countries and dependencies by area, 12th-largest in the world. It is bordered by the Red Sea to the west; Jordan, Iraq, and Kuwait to the north; the Persian Gulf, Bahrain, Qatar and the United Arab Emirates to the east; Oman to the southeast; and Yemen to Saudi Arabia–Yemen border, the south. The Gulf of Aqaba in the northwest separates Saudi Arabia from Egypt and Israel. Saudi Arabia is the only country with a coastline along both the Red Sea and the Persian Gulf, and most of Geography of Saudi Arabia, its terrain consists of Arabian Desert, arid desert, lowland, steppe, and List of mountains in Saudi Arabia, mountains. The capital and List of cities ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flight Envelope
In aerodynamics, the flight envelope, service envelope, or performance envelope of an aircraft or spacecraft refers to the capabilities of a design in terms of airspeed and load factor or atmospheric density, often simplified to altitude. The term is somewhat loosely applied, and can also refer to other measurements such as maneuverability. For example, when a plane is pushed, for instance by diving it at high speeds, it is said to be flown "outside the envelope", something considered rather dangerous. During vehicle test programs, flight envelope simply means that part of the aircraft or spacecraft's design capabilities that have already been successfully tested, and have therefore moved from theoretical or designed capability into a demonstrated/certified capability. Flight envelope is one of a number of related terms that are used in a similar fashion. It is perhaps the most common term because it is the oldest, first being used in the early days of test flight. It is clos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Midair Refuelling
Aerial refueling ( en-us), or aerial refuelling (en-gb), also referred to as air refueling, in-flight refueling (IFR), air-to-air refueling (AAR), and tanking, is the process of transferring aviation fuel from one aircraft (the tanker) to another (the receiver) while both aircraft are in flight. The two main refueling systems are '' probe-and-drogue'', which is simpler to adapt to existing aircraft and the '' flying boom'', which offers faster fuel transfer, but requires a dedicated boom operator station. The procedure allows the receiving aircraft to remain airborne longer, extending its range or loiter time. A series of air refuelings can give range limited only by crew fatigue/physical needs and engineering factors such as engine oil consumption. Because the receiver aircraft is topped-off with extra fuel in the air, air refueling can allow a takeoff with a greater payload which could be weapons, cargo, or personnel: the maximum takeoff weight is maintained by carrying les ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maiden Flight
The maiden flight, also known as first flight, of an aircraft is the first occasion on which it leaves the ground under its own power. The same term is also used for the first launch of rockets. In the early days of aviation it could be dangerous, because the exact handling characteristics of the aircraft were generally unknown. The maiden flight of a new type is almost invariably flown by a highly experienced test pilot. Maiden flights are usually accompanied by a chase plane, to verify items like altitude, airspeed, and general airworthiness. A maiden flight is only one stage in the development of an aircraft type. Unless the type is a pure research aircraft (such as the X-15), the aircraft must be tested extensively to ensure that it delivers the desired performance with an acceptable margin of safety. In the case of civilian aircraft, a new type must be certified by a governing agency (such as the Federal Aviation Administration in the United States) before it can enter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
I042107 213 (469010793)
I, or i, is the ninth letter and the third vowel letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''i'' (pronounced ), plural ''ies''. Name In English, the name of the letter is the "long I" sound, pronounced . In most other languages, its name matches the letter's pronunciation in open syllables. History In the Phoenician alphabet, the letter may have originated in a hieroglyph for an arm that represented a voiced pharyngeal fricative () in Egyptian, but was reassigned to (as in English "yes") by Semites because their word for "arm" began with that sound. This letter could also be used to represent , the close front unrounded vowel, mainly in foreign words. The Greeks adopted a form of this Phoenician ''yodh'' as their letter ''iota'' () to represent , the same as in the Old Italic alphabet. In Latin (as in Modern Greek), it was also used to represent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Developed Nation
A developed country, or advanced country, is a sovereign state that has a high quality of life, developed economy, and advanced technological infrastructure relative to other less industrialized nations. Most commonly, the criteria for evaluating the degree of economic development are the gross domestic product (GDP), gross national product (GNP), the per capita income, level of industrialization, amount of widespread infrastructure and general standard of living. Which criteria are to be used and which countries can be classified as being developed are subjects of debate. Different definitions of developed countries are provided by the International Monetary Fund and the World Bank; moreover, HDI ranking is used to reflect the composite index of life expectancy, education, and income per capita. In 2025, 40 countries fit all three criteria, while an additional 21 countries fit two out of three. Developed countries have generally more advanced post-industrial economies, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shimon Peres
Shimon Peres ( ; ; born Szymon Perski, ; 2 August 1923 – 28 September 2016) was an Israeli politician and statesman who served as the prime minister of Israel from 1984 to 1986 and from 1995 to 1996 and as the president of Israel from 2007 to 2014. He was a member of twelve Cabinet of Israel, cabinets and represented five political parties in a political career spanning 70 years. Peres was elected to the Knesset in November 1959 and except for three months out of office in early 2006, served as a member of the Knesset continuously until he was elected president in 2007. Serving in the Knesset for 48 years (with the first uninterrupted stretch lasting more than 46 years), Peres is the longest serving member in the Knesset's history. At the time of his retirement from politics in 2014, he was the world's oldest head of state and was considered the last link to Israel's founding generation, as well as the last Prime Minister to make aliyah rather than being born on territory that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beit Shemesh
Beit Shemesh () is a city council (Israel), city located approximately west of Jerusalem in Israel's Jerusalem District. A center of Haredi Judaism and Modern Orthodoxy, Beit Shemesh has a population of 170,683 as of 2024. The city is named after and located near the remains of ancient Beth Shemesh, a biblical city in the territory of Tribe of Judah, Judah. Its ruins can be found today at the archaeological site of Tel Beit Shemesh. History Tel Beit Shemesh The small archaeological Tell (archaeology), tell northwest of the modern city was identified in the late 1830s as Biblical Tel Beit Shemesh, Beth Shemesh – it was known as Ain Shams – by Edward Robinson (scholar), Edward Robinson. The mound hosts the ruins of an ancient city that belonged to the tribe of Tribe of Judah, Judah. Excavations were carried out in various phases during the 20th century. There are also other ancient ruins and findings within the boundaries of the modern municipality. In the area of the neighb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratt & Whitney
Pratt & Whitney is an American aerospace manufacturer with global service operations. It is a subsidiary of RTX Corporation (formerly Raytheon Technologies). Pratt & Whitney's aircraft engines are widely used in both civil aviation (especially airliners) and military aviation. Its headquarters are in East Hartford, Connecticut.Contact Us ." Pratt & Whitney. Retrieved on January 7, 2011. "Corporate Headquarters Pratt & Whitney 400 Main Street East Hartford, CT 06108." The company is the world's second largest commercial aircraft engine manufacturer, with a 35% market share . In addition to aircraft engines, Pratt & Whitney manufactures gas turbine engines for industrial use, marine propulsion, and [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aircraft Flight Control Systems
A conventional fixed-wing aircraft flight control system (AFCS) consists of flight control surfaces, the respective cockpit controls, connecting linkages, and the necessary operating mechanisms to control an aircraft's direction in flight. Aircraft engine controls are also considered flight controls as they change speed. The fundamentals of aircraft controls are explained in flight dynamics. This article centers on the operating mechanisms of the flight controls. The basic system in use on aircraft first appeared in a readily recognizable form as early as April 1908, on Louis Blériot's Blériot VIII pioneer-era monoplane design. Cockpit controls Primary controls Generally, the primary cockpit flight controls are arranged as follows:Langewiesche, WolfgangStick and Rudder: An Explanation of the Art of Flying McGraw-Hill Professional, 1990, , . * A control yoke (also known as a control column), centre stick or side-stick (the latter two also colloquially known as a c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Angle Of Attack
In fluid dynamics, angle of attack (AOA, α, or \alpha) is the angle between a Airfoil#Airfoil terminology, reference line on a body (often the chord (aircraft), chord line of an airfoil) and the vector (geometry), vector representing the relative motion between the body and the fluid through which it is moving. Angle of attack is the angle between the body's reference line and the oncoming flow. This article focuses on the most common application, the angle of attack of a wing or airfoil moving through air. In aerodynamics, angle of attack specifies the angle between the chord line of the wing of a fixed-wing aircraft and the vector representing the relative motion between the aircraft and the atmosphere. Since a wing can have twist, a chord line of the whole wing may not be definable, so an alternate reference line is simply defined. Often, the chord line of the Wing root, root of the wing is chosen as the reference line. Another choice is to use a horizontal line on the fuse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
