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Martin XB-51
The Martin XB-51 was an American trijet ground-attack aircraft. It was designed in 1945 and made its maiden flight in 1949. It was originally designed as a bomber for the United States Army Air Forces under specification V-8237-1 and was designated XA-45. The "A" ground-attack classification was eliminated the next year, and the XB-51 designation was assigned instead. The requirement was for low-level bombing and close support. The XB-51 lost out in evaluation to the English Electric Canberra which — built by Martin — entered service as the Martin B-57 Canberra. Design and development This unorthodox design, first flying on 28 October 1949, was fitted with three General Electric J47 engines - an unusual number for a combat aircraft - two underneath the forward fuselage in pods, and one at the extreme tail with the intake at the base of the tailfin. The innovative, Variable-incidence wing, variable incidence wings, swept at 35° and with 6° Dihedral (aircraft)#Anhedral, anh ... [...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] |
Martin B-26 Marauder
The Martin B-26 Marauder is an American twin-engined medium bomber that saw extensive service during World War II. The B-26 was built at two locations: Baltimore, Maryland, and Omaha, Nebraska, by the Glenn L. Martin Company. First used in the Pacific Theater of World War II in early 1942, it was also used in the Mediterranean Theater and in Western Europe. After entering service with the United States Army aviation units, the aircraft quickly received the reputation of a " widowmaker" due to the early models' high accident rate during takeoffs and landings. This was because the Marauder had to be flown at precise airspeeds, particularly on final runway approach or when one engine was out. The unusually high 150 mph (241 km/h) speed on short final runway approach was intimidating to many pilots who were used to much slower approach speeds, and when they slowed to speeds below those stipulated in the manual, the aircraft would often stall and crash.Ethell 1995, p. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NACA Airfoil
The NACA airfoil series is a set of standardized airfoil shapes developed by this agency, which became widely used in the design of aircraft wings. Origins NACA initially developed the numbered airfoil system which was further refined by the United States Air Force at Langley Research Center. According to the NASA website: Four-digit series The NACA four-digit wing sections define the profile by: # First digit describing maximum Camber (aerodynamics), camber as percentage of the Chord (aircraft), chord. # Second digit describing the distance of maximum camber from the airfoil leading edge in tenths of the chord. # Last two digits describing maximum thickness of the airfoil as percent of the chord. For example, the NACA 2412 airfoil has a maximum camber of 2% located 40% (0.4 chords) from the leading edge with a maximum thickness of 12% of the chord. The NACA 0015 airfoil is symmetrical, the 00 indicating that it has no camber. The 15 indicates that the airfoil has a 15% thick ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martin XB-51 3-view Line Drawing
Martin may refer to: Places Antarctica * Martin Peninsula, Marie Byrd Land * Port Martin, Adelie Land * Point Martin, South Orkney Islands Europe * Martin, Croatia, a village * Martin, Slovakia, a city * Martín del Río, Aragón, Spain * Martín River, a tributary of the Ebro river in Spain * Martin (Val Poschiavo), Switzerland England * Martin, Hampshire * Martin, Kent * Martin, East Lindsey, Lincolnshire, a hamlet and former parish * Martin, North Kesteven, Lincolnshire, a village and parish * Martin Hussingtree, Worcestershire * Martin Mere, a lake in Lancashire ** WWT Martin Mere, a wetland nature reserve that includes the lake and surrounding areas North America Canada * Rural Municipality of Martin No. 122, Saskatchewan, Canada * Martin Islands, Nunavut, Canada United States * Martin, Florida * Martin, Georgia * Martin, Indiana * Martin, Kentucky * Martin, Louisiana * Martin, Michigan * Martin, Nebraska * Martin, North Dakota * Martin, Ohio * Martin, Sou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tales Of Tomorrow
''Tales of Tomorrow'' is an American anthology science fiction series that was performed and broadcast live on ABC from 1951 to 1953. The series covered such stories as ''Frankenstein'' starring Lon Chaney Jr., ''20,000 Leagues Under the Sea'' starring Thomas Mitchell as Captain Nemo, and many others. Cast Besides Chaney and Mitchell, the show featured such performers as Boris Karloff, James Dean, Brian Keith, Lee J. Cobb, Eva Gabor, Veronica Lake, Rod Steiger, Bruce Cabot, Franchot Tone, Louis Hector, Gene Lockhart, Walter Abel, Cloris Leachman, Leslie Nielsen, Joanne Woodward and Paul Newman. The series had many similarities to the later '' Twilight Zone'' which also covered one of the same stories, " What You Need". In total it ran for eighty-five 30-minute episodes. It was called “the best science-fiction fare on TV today” by Paul Fairman, editor of '' If.'' Production The idea for this science fiction television series was developed by Theodore Sturgeon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toward The Unknown
''Toward the Unknown'', originally called ''Flight Test Center'' and titled ''Brink of Hell'' in its UK release, is a 1956 American aviation film about the dawn of supersonic flight filmed on location at Edwards Air Force Base. Starring William Holden, Lloyd Nolan and Virginia Leith, the film features the screen debut of James Garner. ''Toward the Unknown'' was directed by Mervyn LeRoy and written by Beirne Lay, Jr. who had also penned the novel and screenplay for '' Twelve O'Clock High'' (1949), and later screenplays for '' Above and Beyond'' (1952) and ''Strategic Air Command'' (1955). The film's title is derived from the motto of the Air Force Flight Test Center, ''Ad Inexplorata''.Erickson, Glenn"Toward the Unknown."''DVD Savant,'' June 11, 2011. Retrieved: November 13, 2011. Plot USAF Major Lincoln Bond was captured during the Korean War and subjected to torture, finally cracking after 14 months and signing a confession used for propaganda. Upon his release, he took a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forward Airfield
Advance airfield and forward airfield are military terms for a relatively primitive ad-hoc airfield used for refueling and re-arming air units as part of forward operations near the enemy. Also called advanced airfield for its advanced position, not advanced facilities, such an airfield typically does not carry full aircraft maintenance and service units, and lacks the comfort and security of a major air base. Advance airfields may be subject to enemy observation and attack. They may be expected to change hands after a battle. The advantages of using advance airfields are various. Air raids can penetrate deeper into enemy-held territory, surprising the enemy with unexpected range. Air units stationed nearer the front can respond more quickly to the needs of friendly land and naval units. Damaged aircraft can land at the advance airfield to save those aboard, and possibly the aircraft. Wounded personnel can be brought to the advance airfield to be evacuated for more complete hospit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G-force
The g-force or gravitational force equivalent is a Specific force, mass-specific force (force per unit mass), expressed in Unit of measurement, units of standard gravity (symbol ''g'' or ''g''0, not to be confused with "g", the symbol for grams). It is used for sustained accelerations that cause a perception of weight. For example, an object at rest on Earth's surface is subject to 1 ''g'', equaling the conventional value of gravitational acceleration on Earth, about . More transient acceleration, accompanied with significant jerk (physics), jerk, is called Shock (mechanics), ''shock''. When the g-force is produced by the surface of one object being pushed by the surface of another object, the reaction force to this push produces an equal and opposite force for every unit of each object's mass. The types of forces involved are transmitted through objects by interior Stress (mechanics), mechanical stresses. Gravitational acceleration is one cause of an object's accelera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limit Load (aeronautics)
For aircraft specification calculation in aeronautics, limit load (LL) is the maximum design load expected as the maximum load any aircraft will see during its lifetime, The limit load can be found relatively easily by statistically analysing the data collected during the many hours of logged flights (which is continuously being gathered) but is generally predicted due to service of other aircraft before the design phase. See also *Ultimate load In engineering, the ultimate load is a statistical figure used in calculations, and should (hopefully) never actually occur. Strength requirements are specified in terms of limit loads (the maximum loads to be expected in service) and ultimate loa ... References Aeronautics {{aviation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avro Canada CF-100 Canuck
The Avro Canada CF-100 Canuck (affectionately known as the "Clunk") is a Canadian twinjet interceptor/ fighter designed and produced by aircraft manufacturer Avro Canada. It has the distinction of being the only Canadian-designed fighter to enter mass production. Work commenced in October 1946 in response to a Royal Canadian Air Force (RCAF) specification calling for a new jet-powered interceptor/fighter aircraft suitable for long-distance patrol missions and all-weather operations. On 19 January 1950, the CF-100 Mark 1 prototype, 18101, conducted its maiden flight, powered by a pair of Rolls-Royce Avon RA 3 turbojet engines. Both pre-production and production series aircraft were powered by the domestically-developed Avro Orenda engine instead. Flight testing proved the CF-100 to possess a relatively short takeoff run and a high climb rate, making it well suited to its role as an interceptor. On 18 December 1952, Squadron Leader Janusz Żurakowski, the Avro company chie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Douglas A-26 Invader
The Douglas A-26 Invader (designated B-26 between 1948 and 1965) is an American twin-engined light bomber and attack aircraft, ground attack aircraft. Built by Douglas Aircraft Company during World War II, the Invader also saw service during several major Cold War conflicts. A limited number of highly modified United States Air Force aircraft served in Indochina Wars, Southeast Asia until 1969. It was a fast aircraft capable of carrying a large bomb load. A range of guns could be fitted to produce a formidable ground-attack aircraft.Wheeler 1992, p. 82. A redesignation of the type from A-26 to B-26 has led to confusion with the earlier and unrelated Martin B-26 Marauder, which had already been withdrawn from service when the designation was reused. Design and development The A-26 was Douglas Aircraft's successor to the Douglas A-20 Havoc, A-20 (DB-7) Havoc, also known as Douglas Boston. Designed by Ed Heinemann, Robert Donovan, and Ted R. Smith,Francillon 1979 the innovative ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korean War
The Korean War (25 June 1950 – 27 July 1953) was an armed conflict on the Korean Peninsula fought between North Korea (Democratic People's Republic of Korea; DPRK) and South Korea (Republic of Korea; ROK) and their allies. North Korea was supported by China and the Soviet Union, while South Korea was supported by the United Nations Command (UNC) led by the United States. The conflict was one of the first major proxy wars of the Cold War. Fighting ended in 1953 with an armistice but no peace treaty, leading to the ongoing Korean conflict. After the end of World War II in 1945, Korea, which had been a Korea under Japanese rule, Japanese colony for 35 years, was Division of Korea, divided by the Soviet Union and the United States into two occupation zones at the 38th parallel north, 38th parallel, with plans for a future independent state. Due to political disagreements and influence from their backers, the zones formed their governments in 1948. North Korea was led by Kim Il S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
