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Cherokee RM
The Hall Cherokee II is an American high-wing, single seat glider that was designed by Stan Hall and introduced in 1956 as plans for amateur construction.Said, Bob: ''1983 Sailplane Directory, Soaring Magazine'', pages 8-9. Soaring Society of America, November 1983. USPS 499-920 Due to its low cost and ease of construction, the Cherokee II is one of the most produced home-built gliders. Design and development The Cherokee was designed by Hall to provide homebuilders with an easy-to-construct and inexpensive aircraft that would give performance at least equal to the Schweizer SGS 1-26, which had flown two years earlier. The Cherokee structure is built from wood and covered in doped aircraft fabric covering. The fuselage features truss construction, with longerons and gussets and a fixed monowheel landing gear. The wing has two spars, with geodetic braces handling the torsion loads and is built with a fixed center section and removable outer wing panels. The wings have spoi ... [...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] |
Glass Reinforced Plastic
Fiberglass (American English) or fibreglass (Commonwealth English) is a common type of fiber-reinforced plastic using glass fiber. The fibers may be randomly arranged, flattened into a sheet called a chopped strand mat, or woven into glass cloth. The plastic matrix may be a thermoset polymer matrix—most often based on thermosetting polymers such as epoxy, polyester resin, or vinyl ester resin—or a thermoplastic. Cheaper and more flexible than carbon fiber, it is stronger than many metals by weight, non-magnetic, non-conductive, transparent to electromagnetic radiation, can be molded into complex shapes, and is chemically inert under many circumstances. Applications include aircraft, boats, automobiles, bath tubs and enclosures, swimming pools, hot tubs, septic tanks, water tanks, roofing, pipes, cladding, orthopedic casts, surfboards, and external door skins. Other common names for fiberglass are glass-reinforced plastic (GRP), glass-fiber reinforced plastic (GFRP) or GFK ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soaring Society Of America
The Soaring Society of America (SSA) was founded at the instigation of Warren E. Eaton to promote the sport of soaring in the USA and internationally. The first meeting was held in New York City in the McGraw–Hill Building on February 20, 1932. Its first objective was to hold a national soaring competition every year, but other roles were quickly adopted. In 1954, the Society created the Soaring Hall of Fame. Today the SSA, with a nationwide membership of over 10,000, is headquartered in Hobbs, New Mexico. It is a 501(c)(3) charity organization. The SSA is led by the 17 members on its board of directors and its executive committee, ten of whom are regionally elected by the general membership and serve for three years. The other seven at-large directors are elected annually by the other directors. In addition to the executive meetings of the board, full SSA Board meetings are held twice a year and are open to the general membership. A support staff administers the daily busin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flap (aircraft)
A flap is a high-lift device used to reduce the stalling speed of an aircraft wing at a given weight. Flaps are usually mounted on the wing trailing edges of a fixed-wing aircraft. Flaps are used to reduce the take-off distance and the landing distance. Flaps also cause an increase in drag so they are retracted when not needed. The flaps installed on most aircraft are partial-span flaps; spanwise from near the wing root to the inboard end of the ailerons. When partial-span flaps are extended they alter the spanwise lift distribution on the wing by causing the inboard half of the wing to supply an increased proportion of the lift, and the outboard half to supply a reduced proportion of the lift. Reducing the proportion of the lift supplied by the outboard half of the wing is accompanied by a reduction in the angle of attack on the outboard half. This is beneficial because it increases the margin above the stall of the outboard half, maintaining aileron effectiveness and reduci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miller Tern
The Miller Tern is an American single-seat, high wing glider that was designed by William Terrance Miller and offered as plans for amateur construction.Said, Bob: ''1983 Sailplane Directory, Soaring Magazine'', page 15. Soaring Society of America, November 1983. USPS 499-920 Design and development Named for the bird, the Tern was the product of Miller's desire to design a sailplane specifically for homebuilding, providing ease of construction and good performance for its day. The first Tern was completed in 1965 and at least 36 more were completed in the US, Canada and other countries. Plans are no longer available. The Tern is constructed from a combination of wood and fiberglass. It has a fixed monowheel landing gear, dive brakes and an optional tail-mounted drag chute. The cantilever wing uses a Wortmann 61 series airfoil. The basic Tern has a wingspan that gives a glide ratio of 34:1 at , while the longer span Tern II, with its wingspan, has a glide ratio several points ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hershey, Pennsylvania
Hershey is an unincorporated community and census-designated place (CDP) in Derry Township, Dauphin County, Pennsylvania, United States. It is home to The Hershey Company, which was founded by candy magnate Milton S. Hershey. The community is located east of Harrisburg and is part of the Harrisburg metropolitan area. Hershey has no legal status as an incorporated municipality, and all its municipal services are provided by Derry Township. The population was 13,858 at the 2020 census.U.S. Census Bureau (2020).2020 Census Interactive Population Search PA – Hershey CDP" Retrieved November 11, 2021. Hershey is located southwest of Allentown, east of Harrisburg, and northwest of Philadelphia. History The town was founded by Hershey in 1903 for the company’s workers, and their homes had modern amenities such as electricity, indoor plumbing, and central heating. The town had a public trolley system, a free school to educate the children of employees, a free vocational school ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glide Ratio
In aerodynamics, the lift-to-drag ratio (or L/D ratio) is the lift generated by an aerodynamic body such as an aerofoil or aircraft, divided by the aerodynamic drag caused by moving through air. It describes the aerodynamic efficiency under given flight conditions. The L/D ratio for any given body will vary according to these flight conditions. For an aerofoil wing or powered aircraft, the L/D is specified when in straight and level flight. For a glider it determines the glide ratio, of distance travelled against loss of height. The term is calculated for any particular airspeed by measuring the lift generated, then dividing by the drag at that speed. These vary with speed, so the results are typically plotted on a 2-dimensional graph. In almost all cases the graph forms a U-shape, due to the two main components of drag. The L/D may be calculated using computational fluid dynamics or computer simulation. It is measured empirically by testing in a wind tunnel or in free flight te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laminar Flow Airfoil
An airfoil (American English) or aerofoil (British English) is the cross-sectional shape of an object whose motion through a gas is capable of generating significant lift, such as a wing, a sail, or the blades of propeller, rotor, or turbine. A solid body moving through a fluid produces an aerodynamic force. The component of this force perpendicular to the relative freestream velocity is called lift. The component parallel to the relative freestream velocity is called drag. An airfoil is a streamlined shape that is capable of generating significantly more lift than drag. Airfoils can be designed for use at different speeds by modifying their geometry: those for subsonic flight generally have a rounded leading edge, while those designed for supersonic flight tend to be slimmer with a sharp leading edge. All have a sharp trailing edge. Foils of similar function designed with water as the working fluid are called hydrofoils. The lift on an airfoil is primarily the result o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NACA
The National Advisory Committee for Aeronautics (NACA) was a United States federal agency founded on March 3, 1915, to undertake, promote, and institutionalize aeronautical research. On October 1, 1958, the agency was dissolved and its assets and personnel were transferred to the newly created National Aeronautics and Space Administration (NASA). NACA is an initialism, i.e., pronounced as individual letters, rather than as a whole word (as was NASA during the early years after being established). Among other advancements, NACA research and development produced the NACA duct, a type of air intake used in modern automotive applications, the NACA cowling, and several series of NACA airfoils, which are still used in aircraft manufacturing. During World War II, NACA was described as "The Force Behind Our Air Supremacy" due to its key role in producing working superchargers for high altitude bombers, and for producing the laminar wing profiles for the North American P-51 Mustang. N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torrey Pines State Natural Reserve
Torrey Pines State Natural Reserve is of coastal state park located in the community of La Jolla, in San Diego, California, off North Torrey Pines Road. Although it is located within San Diego city limits, it remains one of the wildest stretches of land (8 km²) on the Southern California coast. It is bordered immediately on the south by Torrey Pines Municipal Golf Course and on the north by the city of Del Mar. The reserve was designated a National Natural Landmark in 1977. The reserve consists of a plateau with cliffs that overlook Torrey Pines State Beach, and a lagoon that is vital to migrating seabirds. Many different kinds of wildlife and flora are found within the reserve, including bobcat, fox, skunk, raccoon, coyote, rabbit, cacti, coastal chaparral, and the rare Torrey pine. During Whale migration, it is sometimes possible to see several species of whale from the cliffs, including humpback whale and gray whale. The of trails within the park offer an attr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grand Prairie, Texas
Grand Prairie is a city in Dallas, Tarrant, and Ellis counties of Texas, in the United States. It is part of the Mid-Cities region in the Dallas–Fort Worth metroplex. It had a population of 175,396 according to the 2010 census, making it the fifteenth most populous city in the state. Remaining the 15th-most populous city in Texas, the 2020 census reported a population of 196,100. History The city of Grand Prairie was first established as Dechman by Alexander McRae Dechman in 1863. He based the name of the town on Big Prairie, Ohio. Prior to then, he resided in Young County near Fort Belknap. The 1860 U.S. Federal Census—Slave Schedules shows an A McR Dechman as having 4 slaves, ages 50, 25, 37 and 10. Dechman learned that he could trade his oxen and wagons for land in Dallas County. In 1863, Dechman bought of land on the eastern side of the Trinity River and of timber land on the west side of the river for a broken-down wagon, oxen team and US$200 in Confederate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diamond Badge
The International Gliding Commission (IGC) is the international governing body for the sport of gliding. It is governed by meetings of delegates from national gliding associations. It is one of several Air Sport Commissions (ASC) of the Fédération Aéronautique Internationale (FAI), or "World Air Sports Federation". FAI is the world body for sporting aviation and the certification of world records for aeronautics and astronautics and was founded in 1905. When the IGC was founded in 1932, it was called CIVV (Commission Internationale de Vol à Voile) and has also been called CVSM (Commission de Vol Sans Moteur). It is the FAI commission responsible for the international competitions, records and badges that apply to gliders and motor gliders. The term "sailplanes" is sometimes used. Hang gliders and paragliders have a separate body called the FAI CIVL Commission, which stands for "Commission Internationale de Vol Libre". The World Gliding Championships are organised every two y ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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