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Douglas DC-4E
The Douglas DC-4E was an American experimental airliner that was developed before World War II. The DC-4E never entered production due to being superseded by an entirely new design, the Douglas DC-4/C-54, which proved very successful. Many of the aircraft's innovative design features found their way into the Nakajima G5N bomber after the single DC-4E prototype was sold to a Japanese airline and clandestinely dismantled for study by Nakajima at the behest of the Imperial Japanese Navy. Design and development The design originated in 1935 from a requirement by United Air Lines. The goal was to develop a much larger and more sophisticated replacement for the DC-3 before the first DC-3 had even flown. Such was the initial interest from other airlines, that American Airlines, Eastern Air Lines, Pan American Airways and Transcontinental and Western Air (TWA) joined United, providing $100,000 each toward the cost of developing the new aircraft. As cost and complexity rose, Pan Amer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WikiProject Aircraft
A WikiProject, or Wikiproject, is a Wikimedia movement affinity group for contributors with shared goals. WikiProjects are prevalent within the largest wiki, Wikipedia, and exist to varying degrees within sister 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'' 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 outside organizations relevant to the field at issue. For e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boeing 307 Stratoliner
The Boeing Model 307 Stratoliner (or Strato-Clipper in Pan American service, or C-75 in USAAF service) is an American stressed-skin four-engine low-wing tailwheel monoplane airliner derived from the B-17 Flying Fortress bomber, which entered commercial service in July 1940. It was the first airliner in revenue service with a pressurized cabin, which with supercharged engines, allowed it to cruise above the weather. As such it represented a major advance over contemporaries, with a cruising speed of at compared to the Douglas DC-3s , at then in service.Davies, 2000, p.52 When it entered commercial service it had to have a crew of five to six, including two pilots, a flight engineer, two flight attendants and an optional navigator, and had a capacity for 33 passengers, which later modifications increased, first to 38, and eventually to 60. Development In 1935, Pan American Airways, United Airlines, American Airlines, Eastern Air Lines and Transcontinental & Western Air (T&WA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Low-wing Aircraft
A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple planes. A monoplane has inherently the highest efficiency and lowest drag of any wing configuration and is the simplest to build. However, during the early years of flight, these advantages were offset by its greater weight and lower manoeuvrability, making it relatively rare until the 1930s. Since then, the monoplane has been the most common form for a fixed-wing aircraft. Characteristics Support and weight The inherent efficiency of the monoplane is best achieved in the cantilever wing, which carries all structural forces internally. However, to fly at practical speeds the wing must be made thin, which requires a heavy structure to make it strong and stiff enough. External bracing can be used to improve structural efficiency, reducing weight and cost. For a wing of a given size, the weight reduction allows it to fly slower ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1930s United States Airliners
Year 193 ( CXCIII) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Sosius and Ericius (or, less frequently, year 946 ''Ab urbe condita''). The denomination 193 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * January 1 – Year of the Five Emperors: The Roman Senate chooses Publius Helvius Pertinax, against his will, to succeed the late Commodus as Emperor. Pertinax is forced to reorganize the handling of finances, which were wrecked under Commodus, to reestablish discipline in the Roman army, and to suspend the food programs established by Trajan, provoking the ire of the Praetorian Guard. * March 28 – Pertinax is assassinated by members of the Praetorian Guard, who storm the imperial palace. The Empire is auctioned off ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Douglas Aircraft
The Douglas Aircraft Company was an American aerospace manufacturer based in Southern California. It was founded in 1921 by Donald Wills Douglas Sr. and later merged with McDonnell Aircraft in 1967 to form McDonnell Douglas; it then operated as a division of McDonnell Douglas. McDonnell Douglas later merged with Boeing in 1997. History 1920s The company was founded as the Douglas Company by Donald Wills Douglas Sr. on July 22, 1921 in Santa Monica, California, following dissolution of the Davis-Douglas Company. An early claim to fame was the first circumnavigation of the world by air in Douglas airplanes in 1924. In 1923, the U.S. Army Air Service was interested in carrying out a mission to circumnavigate the Earth for the first time by aircraft, a program called "World Flight". Donald Douglas proposed a modified Douglas DT to meet the Army's needs. The two-place, open cockpit DT biplane torpedo bomber had previously been produced for the U.S. Navy.Rumerman, Judy. "The Dougla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cancelled Aircraft Projects
Cancel or cancellation may refer to: *Flight cancellation and delay, not operating a scheduled flight Sociology * Cancel culture, boycott and ostracism calling out offensive behavior on social media or in real life Technology and science *Cancel leaf, a bibliographic term for replaced leaves in printed books *Cancellation property, the mathematical property if ''a''×''b'' = ''a''×''c'' then ''b'' = ''c'' **Cancelling out, a technique for simplifying mathematical expressions * Catastrophic cancellation, numerical error arising from subtracting approximations to nearby numbers *Noise cancellation, a method for reducing unwanted sound *Phase cancellation, the effect of two waves that are out of phase with each other being summed *Cancel message, a special message used to remove Usenet articles posted to news servers * Cancel character, an indication that transmitted data are in error or are to be disregarded * Resolution rule, in propositional logic a valid inference rule ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Civil Aircraft
List of civil aircraft is a list of articles on civilian aircraft with descriptions, which excludes aircraft operated by military organizations in civil markings, warbirds, warbirds used for racing, replica warbirds and research aircraft. A ABC Motors *ABC Robin single-seat cabin monoplane Abraham * Abraham Iris I & II two-seat parasol monoplane Abrams *Abrams P-1 Explorer pusher survey aircraft Ace Aircraft Manufacturing Company *Ace Baby Ace single-seat parasol monoplane ultralight homebuilt *Ace Junior Ace single-seat parasol monoplane ultralight homebuilt *Ace Scooter single-seat parasol monoplane ultralight homebuilt Acro Sport *Acro Sport I single-seat aerobatic biplane *Acro Sport II two-seat aerobatic biplane *Pober Pixie single-seat parasol monoplane *Pober Super Ace single-seat parasol monoplane Adam Aircraft Industries *Adam A500 twin piston engined executive passenger aircraft * Adam A700 executive jet Adcox *Adcox Student Prince two-seat open biplane Advanced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Cover
Carl Anson Cover (26 April 1893 – 27 November 1944) was the chief test pilot and first to fly the Douglas Aircraft Company DC-1, DC-2, DC-3, DC-4, and the DC-5 airliners. Cover became Senior Vice President and general manager for Douglas Aircraft and later Vice President of Bell Aircraft. Early life Cover was born on 26 April 1893, to Hugh and Helen Cover in Roxbury, Pennsylvania. He attended high school in Harrisburg, Pennsylvania and worked as a millwright machinist at Bethlehem Steel, where his father was a foreman. Cover had three younger sisters, Margaret, Mary, and Anna. Aviation career US Army Air Service Cover enlisted in the US Army on 1 August 1917, and was sent to Kelly Field in San Antonio for pilot training. He was initially assigned to the 50th Aero Squadron, but was transferred to the 110th Aero Squadron later that same month. Cover was sent to the Military School of Aeronautics at UC Berkeley in November 1917. He was commissioned as an Lieutenant in June 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santa Monica, California
Santa Monica (; Spanish language, Spanish: ''Santa Mónica'') is a city in Los Angeles County, California, Los Angeles County, situated along Santa Monica Bay on California's South Coast (California), South Coast. Santa Monica's 2020 United States Census Bureau, U.S. Census population was 93,076. Santa Monica is a popular resort town, owing to its climate, beaches, and hospitality industry. It has a diverse economy, hosting headquarters of companies such as Hulu, Universal Music Group, Lionsgate Films, and The Recording Academy. Santa Monica traces its history to Rancho San Vicente y Santa Monica, granted in 1839 to the Sepúlveda family of California. The rancho was later sold to John Percival Jones, John P. Jones and Robert Symington Baker, Robert Baker, who in 1875, along with his Californio heiress wife Arcadia Bandini de Stearns Baker, founded Santa Monica, which incorporated as a city in 1886. The city developed into a seaside resort during the late 19th and early 20th cen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santa Monica Airport
Santa Monica Airport (Santa Monica Municipal Airport) is a general aviation airport largely in Santa Monica, California, United States. The airport is about from the Pacific Ocean (Santa Monica Bay) and north of Los Angeles International Airport. The FAA's National Plan of Integrated Airport Systems for 2009–2013 categorized it as a ''reliever airport''. The airport is scheduled to close at the end of 2028. Santa Monica Airport covers a total of 215 acres (87 ha) of land. One of the airport's former hangars, the Barker Hangar, is in use as a public events venue, and is commonly used for a number of televised awards ceremonies and concerts. It is also currently being used as a small-scale supermarket set for the current version of ''Supermarket Sweep''. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radial Engine
The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel. It resembles a stylized star when viewed from the front, and is called a "star engine" in some other languages. The radial configuration was commonly used for aircraft engines before gas turbine engines became predominant. Engine operation Since the axes of the cylinders are coplanar, the connecting rods cannot all be directly attached to the crankshaft unless mechanically complex forked connecting rods are used, none of which have been successful. Instead, the pistons are connected to the crankshaft with a master-and-articulating-rod assembly. One piston, the uppermost one in the animation, has a master rod with a direct attachment to the crankshaft. The remaining pistons pin their connecting rods' attachments to rings around the edge of the master rod. Extra "rows" of radial cylinders can be added i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratt & Whitney R-2180-A Twin Hornet
The Pratt & Whitney R-2180-A Twin Hornet was a radial engine developed in the United States by Pratt & Whitney. It had two rows of seven cylinders each. Applications * Douglas DC-4E * North American XB-21 * Republic P-44 Rocket * Stearman XA-21 The Stearman XA-21 (Model X-100) was a competitor in a United States Army Air Corps competition for a twin-engined attack aircraft which (after redesigns) led to the Douglas A-20 Havoc, Martin A-22 Maryland and North American B-25 Mitchell. De ... Specifications (R-2180-A) See also References * * External links Aerofiles Reciprocating Engines page* https://web.archive.org/web/20160411162935/http://www.enginehistory.org/P%26W/R-2180/R-2180Index.pdf {{DEFAULTSORT:Pratt and Whitney R-2180-A Twin Hornet 1930s aircraft piston engines Aircraft air-cooled radial piston engines R-2180 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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