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Jacobs Aircraft Engine Company
The Jacobs Aircraft Engine Company was an American aircraft engine manufacturer that existed from 1926 to 1956. History Early years The Jacobs Aircraft Engine Company was formed in 1926 in Philadelphia. Later the company moved to Pottstown, Pennsylvania after purchasing the machine workshop of the Light Manufacturing and Foundry Company. Early engines An early product was the 1931 L-3, a three-cylinder air-cooled radial engine. Only 44 were built. By 1933, Jacobs had developed its most famous engine, the L-4 seven-cylinder air-cooled radial, with a power rating of displacement of . It was better known as by its military designation, R-755. At the time it became known as the best producer of engines in the 200-400 horsepower range. Jacobs was the first to start making engines using forged aluminum alloy pistons, sodium-filled exhaust valves, and magnesium alloy crankcases. The L-4 was used mostly on the Cessna Bobcat, Cessna 195, and Stearman Kaydet. Due to the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerospace Industry
Aerospace is a term used to collectively refer to the atmosphere and outer space. Aerospace activity is very diverse, with a multitude of commercial, industrial and military applications. Aerospace engineering consists of aeronautics and astronautics. Aerospace organizations research, design, manufacture, operate, or maintain both aircraft and spacecraft. The beginning of space and the ending of the air is considered as 100 km (62 mi) above the ground according to the physical explanation that the air pressure is too low for a lifting body to generate meaningful lift force without exceeding orbital velocity. Overview In most industrial countries, the aerospace industry is a cooperation of the public and private sectors. For example, several states have a civilian space program funded by the government, such as National Aeronautics and Space Administration in the United States, European Space Agency in Europe, the Canadian Space Agency in Canada, Indian Space R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crankcase
In a piston engine, the crankcase is the housing that surrounds the crankshaft. In most modern engines, the crankcase is integrated into the engine block. Two-stroke engines typically use a crankcase-compression design, resulting in the fuel/air mixture passing through the crankcase before entering the cylinder(s). This design of the engine does not include an oil sump in the crankcase. Four-stroke engines typically have an oil sump at the bottom of the crankcase and the majority of the engine's oil is held within the crankcase. The fuel/air mixture does not pass through the crankcase in a four-stroke engine, however a small amount of exhaust gasses often enter as "blow-by" from the combustion chamber. The crankcase often forms the lower half of the main bearing journals (with the bearing caps forming the other half), although in some engines the crankcase completely surrounds the main bearing journals. An ''open-crank'' engine has no crankcase. This design was used in early ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacobs LA-1
Jacobs may refer to: Businesses and organisations *Jacob's, a brand name for several lines of biscuits and crackers in Ireland and the UK *Jacobs (coffee), a brand of coffee *Jacobs Aircraft Engine Company, former American aircraft engine company *Jacobs Engineering Group, an American international technical professional services firm *Jacobs Entertainment, an American gaming, hospitality, and entertainment company * Jacobs School of Medicine and Biomedical Sciences, at the University at Buffalo, New York, U.S. *Jacobs School of Music, at, Indiana University, U.S. *Jacobs University Bremen, in Germany Places *Jacobs, Louisville, Kentucky, U.S. *Jacobs, Pennsylvania, U.S., now Port Providence *Jacobs, Wisconsin, U.S. *Jacobs Island, Antarctica Other uses *Jacobs (surname), including a list of people with this name *Jacobs F.C., a former Irish football club *, a tug, formerly ''Empire Gnome'' See also * Jacob (other) * Jacobs Creek (other) * Jacobs River (dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aircraft Engine At Wings Over The Rockies Air And Space Museum (4283389212)
An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines. Common examples of aircraft include airplanes, helicopters, airships (including blimps), gliders, paramotors, and hot air balloons. The human activity that surrounds aircraft is called ''aviation''. The science of aviation, including designing and building aircraft, is called ''aeronautics.'' Crewed aircraft are flown by an onboard pilot, but unmanned aerial vehicles may be remotely controlled or self-controlled by onboard computers. Aircraft may be classified by different criteria, such as lift type, aircraft propulsion, usage and others. History Flying model craft and stories of manned flight go back many centuries; however, the first manned ascent — and safe descent — in modern times took place by larger hot-air ball ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harvard Business School
Harvard Business School (HBS) is the graduate business school of Harvard University, a private research university in Boston, Massachusetts. It is consistently ranked among the top business schools in the world and offers a large full-time MBA program, management-related doctoral programs, and many executive education programs. It owns Harvard Business Publishing, which publishes business books, leadership articles, case studies, and the monthly ''Harvard Business Review''. It is also home to the Baker Library/Bloomberg Center. History The school was established in 1908. Initially established by the humanities faculty, it received independent status in 1910, and became a separate administrative unit in 1913. The first dean was historian Edwin Francis Gay (1867–1946). Yogev (2001) explains the original concept: :This school of business and public administration was originally conceived as a school for diplomacy and government service on the model of the French '' Ecole des S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frederic M
{{disambiguation, geo ...
Frederic may refer to: Places United States * Frederic, Wisconsin, a village in Polk County * Frederic Township, Michigan, a township in Crawford County ** Frederic, Michigan, an unincorporated community Other uses * Frederic (band), a Japanese rock band * Frederic (given name), a given name (including a list of people and characters with the name) * Hurricane Frederic, a hurricane that hit the U.S. Gulf Coast in 1979 * Trent Frederic, American ice hockey player See also * Frédéric * Frederick (other) * Fredrik * Fryderyk (other) Fryderyk () is a given name, and may refer to: * Fryderyk Chopin (1810–1849), a Polish piano composer * Fryderyk Getkant (1600–1666), a military engineer, artilleryman and cartographer of German origin * Fryderyk Scherfke (1909–1983), an inte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whiz Kids (Department Of Defense)
Whiz Kids was a name given to a group of experts from RAND Corporation with which Robert McNamara surrounded himself in order to turn around the management of the United States Department of Defense (DoD) in the 1960s. The purpose was to shape a modern defense strategy in the Nuclear Age by bringing in economic analysis, operations research, game theory, computing, as well as implementing modern management systems to coordinate the huge dimension of operations of the DoD with methods such as the Planning, Programming, and Budgeting System (PPBS). They were called the Whiz Kids recalling the group at Ford Motor Company that McNamara was part of a decade earlier. The group included (among others): * Harold Brown * Alain Enthoven * Steven Fenster * Patrick Gross * William Kaufmann * Jan Lodal * Howard Margolis * Frank Nicolai * Merton Joseph Peck * Charles O. Rossotti * Henry Rowen * John H. Rubel * Ivan Selin * Pierre Sprey * David Staiger * Adam Yarmolinsky * Richard Z ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. World War II was a total war that directly involved more than 100 million personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the only two nuclear weapons ever used in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, mostly among civilians. Tens of millions died due to genocides (including the Holocaust), starvation, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waco Aircraft Company
The Waco Aircraft Company (WACO) was an aircraft manufacturer located in Troy, Ohio, United States. Between 1920 and 1947, the company produced a wide range of civilian biplanes. The company initially started under the name Weaver Aircraft Company of Ohio but changed its name to the Waco Aircraft Company in 1928/29. Company name WACO (referring to the aircraft) is usually pronounced "wah-co" (the first syllable pronounced as in "water"), not "way-co" like Waco, Texas, whose name is entirely unrelated. Several companies operated under the Waco name, with the first company being the Weaver Aircraft Company, a firm founded by George E. Weaver, Clayton Bruckner, and Elwood Junkin in 1920 in Lorain and Medina, Ohio after they had already been collaborating for several years. In the spring of 1923 this became the Advance Aircraft Company in Troy, Ohio, after the departure of Weaver. In 1929, it was changed from Advance Aircraft Company to Waco Aircraft Company. The firm is often ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratt & Whitney R-985 NMUSAF
Pratt is an English surname. Notable people with the surname include: A–F * Abner Pratt (1801–1863), American diplomat, jurist, politician, lawyer * Al Pratt (baseball) (1847–1937), American baseball player * Andy Pratt (baseball) (born 1979), American baseball player * Andy Pratt (singer-songwriter) (born 1947), American singer-songwriter and musician * Antwerp Edgar Pratt (1852-1924), British naturalist, explorer, collector of plants and animals * Awadagin Pratt (born 1966), American concert pianist * Babe Pratt (Walter Peter Pratt, 1916–1988), Canadian ice hockey player * Betty Rosenquest Pratt, (1925–2016), American tennis player * Bob Pratt (1912–2001), Australian rules footballer * Caleb S. Pratt (1832–1861), Union Officer * Charles Pratt, 1st Earl Camden (1713–1794), British lawyer * Charles Pratt (1830–1891), American businessman and philanthropist * Chris Pratt (born 1979), American actor * Christopher Pratt (born 1935), Canadian artist * Daniel Pratt (e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacobs R-915
The Jacobs R-915 or Jacobs L-6 is a seven-cylinder, air-cooled, radial engine for aircraft manufactured in the United States, production started in 1936. Design and development The R-915 was effectively an enlargement of the R-755 with strengthened stressed parts. With a bore and stroke of , for a displacement of . Take-off power was around . The engine features steel cylinders with aluminum-alloy cylinder heads. Variants ;R-915A1:Baseline variant; an enlarged R-755 ;R-915A3:Similar to the A1 but with Scintilla magnetoes ;R-915A4:With a power take-off for autogyros Applications * Avro Anson Mk II and Mk III * Beechcraft Model 18D * Beechcraft F-17D Staggerwing * Fleet 50 * Howard DGA-15J * Kellett KD-1 * Waco AQC, AGC, ARE, AVN Engines on display *A preserved Jacobs R-915 is on display at the Nanton Lancaster Society. *A Jacobs L-6 is on display at the Canadian Museum of Flight The Canadian Museum of Flight (formally the Canadian Museum of Flight Association s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacobs R-830
The Jacobs R-830 or L-5 is a seven-cylinder, air-cooled, radial engine for aircraft manufactured in the United States, production started in 1935.Gunston 1989, p.85. Design and development The R-830 was effectively an enlargement of the R-755 with strengthened stressed parts. With a bore and stroke of 5.0 in × 5.5 in (140 mm × 127 mm) the displacement was 831 cu in (13.6 L), takeoff power was around 285 hp (212 kW). The engine features steel cylinders with aluminum-alloy cylinder heads. Applications * Beechcraft Model 18 * Beechcraft Staggerwing * Fleet 50 * Fleetwings Sea Bird * Howard DGA-8 The Howard DGA-8, DGA-9, DGA-11, and DGA-12 were a family of four-place, single-engine, high-wing light monoplanes built by the Howard Aircraft Corporation, Chicago, Illinois from 1936. Development The various models were distinguished by diffe ... * Waco S Series Specifications (L-5) See also References Notes Bibliography *Gunston, Bill. ''World Ency ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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