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112-475: The Cirrus SR22 is a single-engine four- or five-seat composite aircraft built since 2001 by Cirrus Aircraft of Duluth, Minnesota , United States. It is a development of the Cirrus SR20 , with a larger wing, higher fuel capacity and more powerful, 310-horsepower (231 kW) engine, and a 315 hp (235 kW) engine for the turbocharged version of the aircraft. In the general aviation (GA) industry, it became

224-421: A former ), continuous casting , filament winding , press moulding, transfer moulding , pultrusion moulding, and slip forming . There are also forming capabilities including CNC filament winding, vacuum infusion, wet lay-up, compression moulding , and thermoplastic moulding, to name a few. The practice of curing ovens and paint booths is also required for some projects. The composite parts finishing

336-608: A 2012 Flying magazine review, then editor-in-chief Robert Goyer wrote that the Cirrus SR22 "is the most sophisticated single-engine civilian airplane ever built and by a long shot." In 2013, the manufacturer introduced the SR22 G5 (Generation 5) (there was no G4). Key changes were an increase in gross weight to 3,600 lb (1,633 kg) and a standard five-seat cabin arrangement. The G5 received only minor changes for 2014, including integrated LED lighting and Beringer brakes. In 2014,

448-548: A 35% larger MFD and PFD, a calibrated airspeed -linked checklist scroll wheel, and other upgrades to the instrument panel. Cirrus completed testing for flight into known icing conditions (FIKI) on 12 January 2009. The equipment change involved installing a larger fluid tank for the TKS Ice Protection System and protecting more areas of the aircraft. The FAA approved the new installation in April 2009. For several years,

560-535: A 7.5:1 compression ratio and can run on 94 octane fuel . SR22s and SR20s built before 2003 were equipped with traditional analog instruments and a 10" (later 12") Multi-function display (MFD). In February 2003, Cirrus began offering SR22s with the Avidyne Entegra primary flight display (PFD), making the plane the first of its kind to come with a glass cockpit . Later that year, this instrumentation became standard equipment on all SR-series aircraft and sparked

672-565: A botanical garden, and a museum that was designed to have a national and permanent status. The former occupied space where the present Botanic Garden sits. The museum contained specimens of zoology, botany, archeology, fossils, etc., some of which were passed on to the Smithsonian Institution after its formation. The institute's charter expired in 1838, but its spirit lived on in the National Institution , founded in 1840. With

784-428: A castering nose wheel and steering via differential braking on the main wheels. It is powered by a nose-mounted 310 hp (231 kW) Continental IO-550-N piston engine. The four-seat cabin is accessed through doors on both sides of the fuselage. The SR-series remains the only production airplane in its class to include side stick flight controls that combine aspects of a traditional yoke handle (referred to in

896-413: A central core of end grain balsa wood , bonded to surface skins of light alloy or GRP. These generate low-weight, high rigidity materials. Particulate composites have particle as filler material dispersed in matrix, which may be nonmetal, such as glass, epoxy. Automobile tire is an example of particulate composite. Advanced diamond-like carbon (DLC) coated polymer composites have been reported where

1008-551: A chemical reaction) into a rigid structure. Usually, the operation is done in an open or closed forming mould. However, the order and ways of introducing the constituents alters considerably. Composites fabrication is achieved by a wide variety of methods, including advanced fibre placement (automated fibre placement), fibreglass spray lay-up process , filament winding , lanxide process , tailored fibre placement , tufting , and z-pinning . The reinforcing and matrix materials are merged, compacted, and cured (processed) within

1120-696: A co-curing or post-curing of the prepreg with many other media, such as foam or honeycomb. Generally, this is known as a sandwich structure . This is a more general layup for the production of cowlings, doors, radomes or non-structural parts. Open- and closed-cell-structured foams like polyvinyl chloride , polyurethane , polyethylene , or polystyrene foams, balsa wood , syntactic foams , and honeycombs are generally utilized core materials. Open- and closed-cell metal foam can also be utilized as core materials. Recently, 3D graphene structures ( also called graphene foam) have also been employed as core structures. A recent review by Khurram and Xu et al., have provided

1232-1061: A high deformation setting and are often used in deployable systems where structural flexing is advantageous. Although high strain composites exhibit many similarities to shape-memory polymers, their performance is generally dependent on the fibre layout as opposed to the resin content of the matrix. Composites can also use metal fibres reinforcing other metals, as in metal matrix composites (MMC) or ceramic matrix composites (CMC), which includes bone ( hydroxyapatite reinforced with collagen fibres), cermet (ceramic and metal), and concrete . Ceramic matrix composites are built primarily for fracture toughness , not for strength. Another class of composite materials involve woven fabric composite consisting of longitudinal and transverse laced yarns. Woven fabric composites are flexible as they are in form of fabric. Organic matrix/ceramic aggregate composites include asphalt concrete , polymer concrete , mastic asphalt , mastic roller hybrid, dental composite , syntactic foam , and mother of pearl . Chobham armour

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1344-709: A lightweight but thick core. The core material is normally low strength material, but its higher thickness provides the sandwich composite with high bending stiffness with overall low density . Wood is a naturally occurring composite comprising cellulose fibres in a lignin and hemicellulose matrix. Engineered wood includes a wide variety of different products such as wood fibre board, plywood , oriented strand board , wood plastic composite (recycled wood fibre in polyethylene matrix), Pykrete (sawdust in ice matrix), plastic-impregnated or laminated paper or textiles, Arborite , Formica (plastic) , and Micarta . Other engineered laminate composites, such as Mallite , use

1456-533: A major transition in general aviation , whereby over 90% of all new light aircraft by the year 2006 were equipped with glass cockpits. Retrofits are available for the older SR aircraft that replace the analog instrument panels with one that includes a PFD, a new MFD and the installation of back-up mechanical instruments. On 22 May 2008, Cirrus revealed the "Cirrus Perspective" glass cockpit (by Garmin ). Both cockpits were available for several months (the Avidyne cockpit

1568-1064: A matrix of cement . Concrete is an inexpensive material, and will not compress or shatter even under quite a large compressive force. However, concrete cannot survive tensile loading (i.e., if stretched it will quickly break apart). Therefore, to give concrete the ability to resist being stretched, steel bars, which can resist high stretching (tensile) forces, are often added to concrete to form reinforced concrete . Fibre-reinforced polymers include carbon-fiber-reinforced polymers and glass-reinforced plastic . If classified by matrix then there are thermoplastic composites , short fibre thermoplastics , long fibre thermoplastics or long-fiber-reinforced thermoplastics . There are numerous thermoset composites, including paper composite panels . Many advanced thermoset polymer matrix systems usually incorporate aramid fibre and carbon fibre in an epoxy resin matrix. Shape-memory polymer composites are high-performance composites, formulated using fibre or fabric reinforcements and shape-memory polymer resin as

1680-402: A mould to undergo a melding event. The part shape is fundamentally set after the melding event. However, under particular process conditions, it can deform. The melding event for a thermoset polymer matrix material is a curing reaction that is caused by the possibility of extra heat or chemical reactivity such as an organic peroxide. The melding event for a thermoplastic polymeric matrix material

1792-802: A non-corrosive alternative to galvanized steel. In 2007, an all-composite military Humvee was introduced by TPI Composites Inc and Armor Holdings Inc, the first all-composite military vehicle . By using composites the vehicle is lighter, allowing higher payloads. In 2008, carbon fibre and DuPont Kevlar (five times stronger than steel) were combined with enhanced thermoset resins to make military transit cases by ECS Composites creating 30-percent lighter cases with high strength. Pipes and fittings for various purpose like transportation of potable water, fire-fighting, irrigation, seawater, desalinated water, chemical and industrial waste, and sewage are now manufactured in glass reinforced plastics. Composite materials used in tensile structures for facade application provides

1904-573: A paid, one-month internship. Pilar O'Leary launched the program when she served as executive director of the Smithsonian Latino Center. According to the Latino Center, O'Leary told the press in 2007: "Our goal is to help our Young Ambassadors become the next generation of leaders in the arts and culture fields. This program encourages students to be proud of their roots and learn more about their cultural heritage to inspire them to educate

2016-571: A single year for Cirrus since 2001, and the first year where the number of CAPS deployments (12) exceeded the number of fatal accidents (3). As of September 2018, pilots had deployed the SR-series parachute 79 times, with 163 survivors. After a failed CAPS deployment in March 2021, Cirrus issued a service bulletin and replaced the firing mechanism in the CAP systems (which control the primer material that ignites

2128-746: A total of 250 U.S. gallons (950 L; 210 imp gal) usable. The French Air and Space Force uses six SR22s as training aircraft , and the Royal Saudi Air Force acquired 25 SR22s in 2013, replacing Cessna 172s as primary trainers at the King Faisal Air Academy . In 2015 Emirates purchased 22 aircraft for training purposes. The Minnesota State Patrol uses a special missions "Cirrus Perception" SR22 for law enforcement operations, surveillance, search and rescue missions, and more. Between 2001 and May 2014, 147 U.S.-registered Cirrus SR22 aircraft crashed, killing 122 people. In 2011,

2240-597: A whole-plane emergency recovery parachute system: the Cirrus Airframe Parachute System (CAPS). This has contributed to its market success and has given it the nickname "the plane with the parachute". The SR22, certified in November 2000, is a more powerful version of the earlier SR20 . Production of the aircraft started in 2001. The SR22 is a low-wing cantilever monoplane of composite construction, featuring fixed (non-retractable) tricycle landing gear with

2352-516: A year and includes as ex officio members the chief justice of the United States and the vice president of the United States . The nominal head of the institution is the chancellor , an office which has traditionally been held by the chief justice. In September 2007, the board created the position of chair of the Board of Regents, a position currently held by Risa Lavizzo-Mourey . Other members of

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2464-413: Is a solidification from the melted state. The melding event for a metal matrix material such as titanium foil is a fusing at high pressure and a temperature near the melting point. It is suitable for many moulding methods to refer to one mould piece as a "lower" mould and another mould piece as an "upper" mould. Lower and upper does not refer to the mould's configuration in space, but the different faces of

2576-578: Is a special type of composite armour used in military applications. Additionally, thermoplastic composite materials can be formulated with specific metal powders resulting in materials with a density range from 2 g/cm to 11 g/cm (same density as lead). The most common name for this type of material is "high gravity compound" (HGC), although "lead replacement" is also used. These materials can be used in place of traditional materials such as aluminium, stainless steel, brass, bronze, copper, lead, and even tungsten in weighting, balancing (for example, modifying

2688-424: Is also crucial in the final design. Many of these finishes will involve rain-erosion coatings or polyurethane coatings. The mould and mould inserts are referred to as "tooling". The mould/tooling can be built from different materials. Tooling materials include aluminium , carbon fibre , invar , nickel , reinforced silicone rubber and steel. The tooling material selection is normally based on, but not limited to,

2800-469: Is also used in payload adapters, inter-stage structures and heat shields of launch vehicles . Furthermore, disk brake systems of airplanes and racing cars are using carbon/carbon material, and the composite material with carbon fibres and silicon carbide matrix has been introduced in luxury vehicles and sports cars . In 2006, a fibre-reinforced composite pool panel was introduced for in-ground swimming pools, residential as well as commercial, as

2912-441: Is another main factor. To support high capital investments for rapid and automated manufacturing technology, vast quantities can be used. Cheaper capital investments but higher labour and tooling expenses at a correspondingly slower rate assists the small production quantities. Many commercially produced composites use a polymer matrix material often called a resin solution. There are many different polymers available depending upon

3024-463: Is interested, might be interested or ought to be interested". Another Secretary of the Smithsonian, Walter Boyne, founded Air & Space . The organization publishes under the imprints Smithsonian Institution Press, Smithsonian Books, and Smithsonian Institution Scholarly Press. The Smithsonian makes a number of awards to acknowledge and support meritorious work. The Smithsonian Institution

3136-410: Is needed at least. The reinforcement receives support from the matrix as the matrix surrounds the reinforcement and maintains its relative positions. The properties of the matrix are improved as the reinforcements impart their exceptional physical and mechanical properties. The mechanical properties become unavailable from the individual constituent materials by synergism. At the same time, the designer of

3248-415: Is no delamination at the fibre-matrix interface). This isostrain condition provides the upper bound for composite strength, and is determined by the rule of mixtures : where E C is the effective composite Young's modulus , and V i and E i are the volume fraction and Young's moduli, respectively, of the composite phases. For example, a composite material made up of α and β phases as shown in

3360-446: Is that they are able to have shape memory behaviour without needing any shape-memory polymers or shape-memory alloys e.g. balsa plies interleaved with hot glue, aluminium plies interleaved with acrylic polymers or PVC and carbon-fiber-reinforced polymer laminates interleaved with polystyrene . A sandwich-structured composite is a special class of composite material that is fabricated by attaching two thin but stiff skins to

3472-510: The Cessna 400 (1.0), despite the SR22's full aircraft parachute system. By the end of 2013, the fatality rate had been reduced to 1.01 per 100,000 flight hours. This was attributed to better training, particularly in the use of the ballistic parachute system. The fatality rate continued to decrease in 2014, to .42 per 100,000 flight hours, one of the industry's lowest. This marked the fewest fatalities in

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3584-533: The Marquis de Lafayette . Operating expenses were covered from the $ 5 yearly dues collected from each member. The institute proposed a number of undertakings. These included the study of plant life and the creation of a botanical garden on the Capitol Mall , an examination of the country's mineral production, improvement in the management and care of livestock, and the writing of a topographical and statistical history of

3696-737: The National Museum of African Art and the Arthur M. Sackler Gallery opened in a new, joint, underground museum between the Freer Gallery and the Smithsonian Castle. Reuse of another old building came in 1993 with the opening of the National Postal Museum in the 1904 former City Post Office building, a few city blocks from the Mall. In 2004, the Smithsonian opened the National Museum of

3808-639: The National Museum of African Art , as well as the National Gallery of Art , were formally returned to Nigerian cultural officials in a ceremony held in Washington D.C. The Nigerian Minister of Information and Culture, Lai Mohammed , and Prince Aghatise Erediauwa, representing the Oba of Benin Kingdom, spoke at the ceremony. Mohammed said the "decision to return the timeless artworks is worth emulating." In February 2020,

3920-491: The Renwick Gallery . A smaller amount of funds would go to educational initiatives and digitization of collections. As of September 2017, the Smithsonian claimed to have raised $ 1.79 billion, with three months left in the formal campaign calendar. Separately from the major capital campaign, the Smithsonian has begun fundraising through Kickstarter . An example is a campaign to fund the preservation and maintenance of

4032-499: The Smithsonian , is a group of museums , education and research centers , the largest such complex in the world, created by the U.S. government "for the increase and diffusion of knowledge." Founded on August 10, 1846, it operates as a trust instrumentality and is not formally a part of any of the three branches of the federal government . The institution is named after its founding donor, British scientist James Smithson . It

4144-525: The Smithsonian American Women's History Museum . In 2011, the Smithsonian undertook its first-ever capital fundraising campaign. The $ 1.5 billion effort raised $ 1 billion at the three-year mark. Smithsonian officials made the campaign public in October 2014 in an effort to raise the remaining $ 500 million. More than 60,000 individuals and organizations donated money to the campaign by

4256-622: The Smithsonian Institution 's National Air and Space Museum , which opened in 2022. In January 2022, Cirrus announced speed and aesthetic improvements to the G6 SR-series, with a 9 knots (17 km/h) increased cruise speed, upgrades to the mobile IQ app, USB-A and USB-C charging ports and more. In January 2024, the company announced the SR22 G7 (Generation 7), with a major overhaul to the interior and avionics, making it more comparable to

4368-606: The South Pacific Ocean . These specimens and artifacts became part of the Smithsonian collections, as did those collected by several military and civilian surveys of the American West , including the Mexican Boundary Survey and Pacific Railroad Surveys , which assembled many Native American artifacts and natural history specimens. In 1846, the regents developed a plan for weather observation; in 1847, money

4480-647: The avionics and new navigation lighting . In September 2019, Cirrus unveiled the TRAC, a training-oriented version of the SR-series with a simplified interior, more durable seat material, backseat radio transmit switch to allow an observer to communicate with air traffic control , integrated engine indication and crew alerting/warning systems, and simulated retractable landing gear controls and position lights to allow cadets and instructors to feign landing gear operation and failures during instructional flights (the actual landing gear remains permanently fixed). In January 2020,

4592-452: The coefficient of thermal expansion , expected number of cycles, end item tolerance, desired or expected surface condition, cure method, glass transition temperature of the material being moulded, moulding method, matrix, cost, and other various considerations. Usually, the composite's physical properties are not isotropic (independent of the direction of applied force) in nature. But they are typically anisotropic (different depending on

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4704-453: The deaccession and restitution of items collected under circumstances considered unethical by contemporary standards and thus places moral over legal arguments. A month before, the Smithsonian's National Museum of African Art had announced the planned return of most of its 39 Benin Bronzes to Nigeria , as well as of other cultural items to Turkey . On October 11, 2022, Benin Bronzes from

4816-525: The privilege of the floor at the United States Senate . On September 18, 2013, Secretary G. Wayne Clough announced he would retire in October 2014. The Smithsonian Board of Regents said it asked regent John McCarter, Jr., to lead a search committee. On March 10, 2014, the Smithsonian Board selected David Skorton , a physician and president of Cornell University , as the thirteenth secretary of

4928-1028: The ruby slippers worn by Judy Garland for her role as Dorothy Gale in the 1939 film The Wizard of Oz . Nineteen museums and galleries, as well as the National Zoological Park , comprise the Smithsonian museums. Eleven are on the National Mall , the park that runs between the Lincoln Memorial and the United States Capitol . Other museums are located elsewhere in Washington, D.C., with two more in New York City and one in Chantilly, Virginia . The Smithsonian has close ties with 168 other museums in 39 states, Panama , and Puerto Rico . These museums are known as Smithsonian Affiliated museums. Collections of artifacts are given to these museums in

5040-588: The American Indian in a new building near the United States Capitol . Twelve years later almost to the day, in 2016, the latest museum opened: the National Museum of African American History and Culture , in a new building near the Washington Monument . Two more museums have been established and are being planned for eventual construction on the mall: the National Museum of the American Latino and

5152-554: The Board of Regents are three members of the U.S. House of Representatives appointed by the speaker of the House ; three members of the Senate, appointed by the president pro tempore of the Senate ; and nine citizen members, nominated by the board and approved by the Congress in a joint resolution signed by the president of the United States. Regents who are senators or representatives serve for

5264-421: The Cirrus SR22. It included advanced flight envelope protection that could stabilize the aircraft with the push of a button, to avoid spiral from developing. The Cirrus Perspective-Plus avionics flight deck was introduced in 2017, with a faster processing speed, animated datalink weather, payload management, visual approach capabilities, wireless database uploads, glass back-up instruments, and more. In 2020,

5376-624: The FAA to operate a fleet of SR22s, pending certification of its eVTOL aircraft. Australian pilot Ryan Campbell used an SR22 to become the youngest pilot to fly solo around the world (a title which he held for nearly a year), at age nineteen. He completed his trip on 7 September 2013 in Wollongong . His SR22, Spirit of the Sapphire Coast, was modified by removing three seats and adding a 160 U.S. gallons (610 L; 130 imp gal) fuselage tank for

5488-593: The GDP at the time it may be more comparable to $ 220 million in the year 2007. Once the money was in hand, eight years of congressional haggling ensued over how to interpret Smithson's rather vague mandate "for the increase and diffusion of knowledge." The money was invested by the US Treasury in bonds issued by the state of Arkansas, which soon defaulted. After heated debate, Massachusetts representative (and former president) John Quincy Adams persuaded Congress to restore

5600-503: The National Museum of African-American Heritage and Culture. The opening of the center was prompted, in part, by the publishing of a report called "Willful Neglect: The Smithsonian and U.S. Latinos". According to documents obtained by The Washington Post , when former Latino Center executive director Pilar O'Leary first took the job, the center faced employees who had "serious performance issues". No performance plans existed for

5712-621: The Perspective-Plus flight deck included a new stabilized approach advisory system that provides alerts to the pilot of unstable conditions during approach. In 2024, the seventh generation of the SR22 introduced the Cirrus Perspective Touch+ flight deck, the "first-ever piston aircraft to incorporate dual Garmin Touch Controllers”, including taxiway routing and a contextualized 3D taxi guide, improved flight envelope protection,

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5824-505: The SR22 and SR22T had been the best-selling four- to five-seat fixed-wing aircraft in the world for 12 years in a row. In 2016, Cirrus introduced improvements to the SR Series, including Bluetooth wireless connectivity, remote keyless entry , a convenience lighting system, and an easy-access door latch. In 2017, the company introduced the SR22 G6 (Generation 6), with several major upgrades to

5936-480: The Smithsonian Libraries and Smithsonian Archives merged into one research center in 2020. The Smithsonian Institution includes three cultural centers among its units: In 1997, the Smithsonian Latino Center was created as a way to recognize Latinos across the Smithsonian Institution. The primary purpose of the center is to place Latino contributions to the arts, history, science, and national culture across

6048-635: The Smithsonian and funds to build the museum to hold it (which was named the Freer Gallery ), it was among the Smithsonian's first major donations from a private individual. The gallery opened in 1923. More than 40 years would pass before the next museum, the Museum of History and Technology (renamed the National Museum of American History in 1980), opened in 1964. It was designed by the world-renowned firm of McKim, Mead & White . The Anacostia Community Museum , an "experimental store-front" museum created at

6160-495: The Smithsonian made 2.8 million digital items available to the public under a Creative Commons Zero Public Domain Dedication, with a commitment to release further items in the future. The Smithsonian has eight research centers, located in Washington, D.C.; Front Royal, Virginia ; Edgewater, Maryland ; Suitland, Maryland ; Fort Pierce, Florida ; Cambridge, Massachusetts ; and Panama . Formerly two separate entities,

6272-671: The Smithsonian's Department of Living Animals. The park was designed by landscape architect Frederick Law Olmsted . The National Museum of Natural History opened in June 1911 to similarly accommodate the Smithsonian's United States National Museum, which had previously been housed in the Castle and then the Arts and Industries Building. This structure was designed by the D.C. architectural firm of Hornblower & Marshall . When Detroit philanthropist Charles Lang Freer donated his private collection to

6384-411: The Smithsonian's museums and research centers. The center is a division of the Smithsonian Institution. As of May 2016, the center is run by an executive director, Eduardo Díaz. At the time of its creation, the Smithsonian Institution had other entities dedicated to other minority groups: National Museum of the American Indian, Freer-Sackler Gallery for Asian Arts and Culture, African Art Museum, and

6496-476: The Smithsonian, slightly increased from previous years. Institution exhibits are free of charge, though in 2010 the Deficit Commission recommended admission fees. As approved by Congress on August 10, 1846, the legislation that created the Smithsonian Institution called for the creation of a Board of Regents to govern and administer the organization. This seventeen-member board meets at least four times

6608-532: The Smithsonian. Though the Smithsonian's first secretary, Joseph Henry , wanted the institution to be a center for scientific research, it also became the depository for various Washington and U.S. government collections. The United States Exploring Expedition by the U.S. Navy circumnavigated the globe between 1838 and 1842. The voyage amassed thousands of animal specimens, an herbarium of 50,000 plant specimens, and diverse shells and minerals, tropical birds, jars of seawater, and ethnographic artifacts from

6720-576: The United States. Reports were to be published periodically to share this knowledge with the greater public, but due to a lack of funds, this initially did not occur. The institute first met in Blodget's Hotel, later in the Treasury Department and City Hall, before being assigned a permanent home in 1824 in the Capitol building. Beginning in 1825, weekly sittings were arranged during sessions of Congress for

6832-641: The accident record of the SR20/SR22 was examined by Aviation Consumer magazine. It found that the series' overall accident record is better than average for light aircraft, exceeded only by the Diamond DA40 and DA42 . However, its fatal accident rate is worse, at 1.6 per 100,000 flight hours—which places it higher than the United States general aviation rate of 1.2, and higher than the Diamond DA40 (0.35), Cessna 172 (0.45), Diamond DA42 (0.54), Cessna 182 (0.69), and

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6944-667: The advantage of being translucent. The woven base cloth combined with the appropriate coating allows better light transmission. This provides a very comfortable level of illumination compared to the full brightness of outside. The wings of wind turbines, in growing sizes in the order of 50 m length are fabricated in composites since several years. Two-lower-leg-amputees run on carbon-composite spring-like artificial feet as quick as non-amputee athletes. High-pressure gas cylinders typically about 7–9 litre volume x 300 bar pressure for firemen are nowadays constructed from carbon composite. Type-4-cylinders include metal only as boss that carries

7056-428: The case of spider silk, the properties of the material can even be dependent on the size of the crystals, independent of the volume fraction. Ironically, single component polymeric materials are some of the most easily tunable composite materials known. Normally, the fabrication of composite includes wetting, mixing or saturating the reinforcement with the matrix. The matrix is then induced to bind together (with heat or

7168-644: The centre of gravity of a tennis racquet ), vibration damping, and radiation shielding applications. High density composites are an economically viable option when certain materials are deemed hazardous and are banned (such as lead) or when secondary operations costs (such as machining, finishing, or coating) are a factor. There have been several studies indicating that interleaving stiff and brittle epoxy-based carbon-fiber-reinforced polymer laminates with flexible thermoplastic laminates can help to make highly toughened composites that show improved impact resistance. Another interesting aspect of such interleaved composites

7280-1685: The chute’s rocket) for 347 Cirrus SR aircraft and 26 SF50 Vision jets. The SR22 is used by flying schools, several air charter and small air taxi carriers, as well as private individuals and companies. SR22s have been involved in numerous accidents and incidents, with some of the most notable being: Data from Cirrus website and The Incomplete Guide to Airfoil Usage General characteristics Performance Avionics Related development Aircraft of comparable role, configuration, and era Composite material Typical engineered composite materials include: There are various reasons where new material can be favoured. Typical examples include materials which are less expensive, lighter, stronger or more durable when compared with common materials, as well as composite materials inspired from animals and natural sources with low carbon footprint. More recently researchers have also begun to actively include sensing, actuation, computation, and communication into composites, which are known as robotic materials . Composite materials are generally used for buildings , bridges , and structures such as boat hulls , swimming pool panels, racing car bodies, shower stalls, bathtubs , storage tanks , imitation granite , and cultured marble sinks and countertops. They are also being increasingly used in general automotive applications. The most advanced examples perform routinely on spacecraft and aircraft in demanding environments. The earliest composite materials were made from straw and mud combined to form bricks for building construction . Ancient brick-making

7392-941: The coating increases the surface hydrophobicity, hardness and wear resistance. Ferromagnetic composites, including those with a polymer matrix consisting, for example, of nanocrystalline filler of Fe-based powders and polymers matrix. Amorphous and nanocrystalline powders obtained, for example, from metallic glasses can be used. Their use makes it possible to obtain ferromagnetic nanocomposites with controlled magnetic properties. Fibre-reinforced composite materials have gained popularity (despite their generally high cost) in high-performance products that need to be lightweight, yet strong enough to take harsh loading conditions such as aerospace components ( tails , wings , fuselages , propellers ), boat and scull hulls, bicycle frames, and racing car bodies. Other uses include fishing rods , storage tanks , swimming pool panels, and baseball bats . The Boeing 787 and Airbus A350 structures including

7504-547: The cockpit of a Cirrus Vision Jet , as well as safety and engine-start improvements and an automatic fuel selection system. Cirrus introduced the SR22 Turbo in 2006, with a Tornado Alley turbonormalizing upgrade kit that is factory installed under a Supplemental Type Certificate . It included twin turbonormalizers and twin intercoolers . The conversion includes built-in oxygen and a Hartzell three-blade (later four-blade as optional) lightweight composite propeller. The weight of

7616-399: The company introduced a new mobile app for the SR Series, called "Cirrus IQ", which enables remote aircraft communication including access to pre-flight status information like fuel and oxygen levels, battery voltage, oil temperature, aircraft location and flight hours. In October 2020, it was revealed that a 2003 SR22 would be displayed in the new general aviation exhibition "We All Fly" in

7728-893: The composite is σ C = E α V α ϵ + E β V β ϵ = ( E α V α + E β V β ) ϵ {\displaystyle \sigma _{C}=E_{\alpha }V_{\alpha }\epsilon +E_{\beta }V_{\beta }\epsilon =(E_{\alpha }V_{\alpha }+E_{\beta }V_{\beta })\epsilon } Then it can be shown that E C = ( E α V α + E β V β ) {\displaystyle E_{C}=(E_{\alpha }V_{\alpha }+E_{\beta }V_{\beta })} Smithsonian Institution The Smithsonian Institution ( / s m ɪ θ ˈ s oʊ n i ə n / smith- SOH -nee-ən ), or simply

7840-601: The construction of the Arts and Industries Building in 1881. Congress had promised to build a new structure for the museum if the 1876 Philadelphia Centennial Exposition generated enough income. It did, and the building was designed by architects Adolf Cluss and Paul Schulze, based on original plans developed by Major General Montgomery C. Meigs of the United States Army Corps of Engineers . It opened in 1881. The National Zoological Park opened in 1889 to accommodate

7952-562: The conversion reduces the SR22's useful load. Air conditioning is available with the SR22 Turbo, but this further reduces the useful load. The turbo version has a certified ceiling of 25,000 feet (7,600 m), a maximum cruise speed of 211 knots (391 km/h), and a top speed of 219 knots (406 km/h). In 2010, Cirrus introduced the SR22T . This used a new engine, the Continental TSIO-550K , which produces 315 hp (235 kW) with

8064-410: The direction of the applied force or load). For instance, the composite panel's stiffness will usually depend upon the orientation of the applied forces and/or moments. The composite's strength is bounded by two loading conditions, as shown in the plot to the right. If both the fibres and matrix are aligned parallel to the loading direction, the deformation of both phases will be the same (assuming there

8176-401: The duration of their elected terms, while citizen Regents serve a maximum of two six-year terms. Regents are compensated on a part-time basis. The chief executive officer (CEO) of the Smithsonian is the secretary, who is appointed by the Board of Regents. The secretary also serves as secretary to the Board of Regents but is not a voting member of that body. The secretary of the Smithsonian has

8288-466: The figure to the right under isostrain, the Young's modulus would be as follows: E C = V α E α + V β E β {\displaystyle E_{C}=V_{\alpha }E_{\alpha }+V_{\beta }E_{\beta }} where V α and V β are the respective volume fractions of each phase. This can be derived by considering that in

8400-510: The final product, or the fibre content is increased. As a rule of thumb, lay up results in a product containing 60% resin and 40% fibre, whereas vacuum infusion gives a final product with 40% resin and 60% fibre content. The strength of the product is greatly dependent on this ratio. Martin Hubbe and Lucian A Lucia consider wood to be a natural composite of cellulose fibres in a matrix of lignin . Several layup designs of composite also involve

8512-503: The first light aircraft with a full glass cockpit . The SR22 series has been the world's best-selling GA airplane every year since 2003. With 7,737 units delivered from 2001–23, and in combination with the SR20, a total of 9,548, it is the most-produced GA aircraft of the 21st century, and is the single most-produced GA aircraft made from composite material, accounting for nearly 50% of the entire piston aircraft market. The Cirrus SR22 has

8624-924: The form of long-term loans. The Smithsonian also has a large number of traveling exhibitions, operated through the Smithsonian Institution Traveling Exhibition Service (SITES). In 2008, 58 of these traveling exhibitions went to 510 venues across the country. Smithsonian collections include 156 million artworks, artifacts, and specimens. The National Museum of Natural History houses 145 million of these specimens and artifacts, which are mostly animals preserved in formaldehyde. The Collections Search Center has 9.9 million digital records available online. The Smithsonian Institution Libraries hold 2 million library volumes. Smithsonian Archives hold 156,830 cubic feet (4,441 m ) of archival material. The Smithsonian Institution has many categories of displays that can be visited at

8736-414: The individual phases are given by Hooke's Law, σ β = E β ϵ {\displaystyle \sigma _{\beta }=E_{\beta }\epsilon } σ α = E α ϵ {\displaystyle \sigma _{\alpha }=E_{\alpha }\epsilon } Combining these equations gives that the overall stress in

8848-524: The industry as a "side yoke"). The Cirrus SR22, like the SR20, is equipped with the Cirrus Airframe Parachute System (CAPS), which can lower the entire aircraft to the ground relatively gently in an emergency. In 2004, the company introduced the SR22 G2 (Generation 2), and in 2007 the SR22 G3 (Generation 3). Both were defined by airframe modifications, G2 by fuselage, and G3 by modified wing and landing gear. In

8960-812: The initiative of Smithsonian Secretary S. Dillon Ripley , opened in the Anacostia neighborhood of Washington, D.C., in 1967. That same year, the Smithsonian signed an agreement to take over the Cooper Union Museum for the Arts of Decoration (now the Cooper Hewitt, Smithsonian Design Museum ). The National Portrait Gallery and the Smithsonian American Art Museum opened in the Old Patent Office Building (built in 1867) on October 7, 1968. The reuse of an older building continued with

9072-494: The institution's 30 million annual visitors are admitted without charge, the exception being Cooper Hewitt, Smithsonian Design Museum in New York City, which charges an admissions fee. The Smithsonian's annual budget is around $ 1.25 billion, with two-thirds coming from annual federal appropriations. Other funding comes from the institution's endowment , private and corporate contributions, membership dues, and earned retail, concession, and licensing revenue. As of 2021,

9184-538: The institution's endowment had a total value of about $ 5.4 billion. In many ways, the origin of the Smithsonian Institution can be traced to a group of Washington citizens who, being "impressed with the importance of forming an association for promoting useful knowledge," met on June 28, 1816, to establish the Columbian Institute for the Promotion of Arts and Sciences . Officers were elected in October 1816, and

9296-651: The isostrain case, ϵ C = ϵ α = ϵ β = ϵ {\displaystyle \epsilon _{C}=\epsilon _{\alpha }=\epsilon _{\beta }=\epsilon } Assuming that the composite has a uniform cross section, the stress on the composite is a weighted average between the two phases, σ C = σ α V α + σ β V β {\displaystyle \sigma _{C}=\sigma _{\alpha }V_{\alpha }+\sigma _{\beta }V_{\beta }} The stresses in

9408-493: The largest fleet of Cirrus SR22s was operated by ImagineAir , which was in operation from 2007–2018. Previously to this, the largest fleet had been operated by SATSair with 26 aircraft. It began operations in 2004 and went out of business in 2009. The largest European operator is Fly Aeolus , a Belgian fractional ownership company established in 2009 that operates 13 SR22s. In May 2022, California-based air taxi company Joby Aviation received Part 135 air service certification from

9520-527: The legacy bequeathed to the nation and pledged the faith of the United States to the charitable trust on July 1, 1836. The American diplomat Richard Rush was dispatched to England by President Andrew Jackson to collect the bequest. Rush returned in August 1838 with 105 sacks containing 104,960 gold sovereigns . This is approximately $ 500,000 at the time, which is equivalent to $ 14,000,000 in 2023 or equivalent to £12,000,000 in 2023. However, when considering

9632-764: The less stiff, amorphous phase. Polymeric materials can range from 0% to 100% crystallinity aka volume fraction depending on molecular structure and thermal history. Different processing techniques can be employed to vary the percent crystallinity in these materials and thus the mechanical properties of these materials as described in the physical properties section. This effect is seen in a variety of places from industrial plastics like polyethylene shopping bags to spiders which can produce silks with different mechanical properties. In many cases these materials act like particle composites with randomly dispersed crystals known as spherulites. However they can also be engineered to be anisotropic and act more like fiber reinforced composites. In

9744-400: The lost funds with interest and, despite designs on the money for other purposes, convinced his colleagues to preserve it for an institution of science and learning. Finally, on August 10, 1846, President James K. Polk signed the legislation that established the Smithsonian Institution as a trust instrumentality of the United States, to be administered by a Board of Regents and a secretary of

9856-406: The matrix nature, such as solidification from the melted state for a thermoplastic polymer matrix composite or chemical polymerization for a thermoset polymer matrix . According to the requirements of end-item design, various methods of moulding can be used. The natures of the chosen matrix and reinforcement are the key factors influencing the methodology. The gross quantity of material to be made

9968-625: The matrix. Since a shape-memory polymer resin is used as the matrix, these composites have the ability to be easily manipulated into various configurations when they are heated above their activation temperatures and will exhibit high strength and stiffness at lower temperatures. They can also be reheated and reshaped repeatedly without losing their material properties. These composites are ideal for applications such as lightweight, rigid, deployable structures; rapid manufacturing; and dynamic reinforcement. High strain composites are another type of high-performance composites that are designed to perform in

10080-452: The mission to "promote science and the useful arts, and to establish a national museum of natural history," this organization continued to press Congress to establish a museum that would be structured in terms that were very similar to those finally incorporated into the founding of the Smithsonian Institution. Its work helped to develop an underlying philosophy that pushed for the pursuit and development of scientific knowledge that would benefit

10192-420: The moulded panel. There is always a lower mould, and sometimes an upper mould in this convention. Part construction commences by applying materials to the lower mould. Lower mould and upper mould are more generalized descriptors than more common and specific terms such as male side, female side, a-side, b-side, tool side, bowl, hat, mandrel, etc. Continuous manufacturing utilizes a different nomenclature. Usually,

10304-451: The moulded product is referred to as a panel. It can be referred to as casting for certain geometries and material combinations. It can be referred to as a profile for certain continuous processes. Some of the processes are autoclave moulding , vacuum bag moulding , pressure bag moulding , resin transfer moulding , and light resin transfer moulding . Other types of fabrication include casting , centrifugal casting, braiding (onto

10416-606: The museums. In 1912, First Lady Helen Herron Taft donated her inauguration gown to the museum to begin the First Ladies' Gown display at the National Museum of American History , one of the Smithsonian's most popular exhibits. The museum displays treasures such as the Star-Spangled Banner , the stove pipe hat that was worn by President Abraham Lincoln , the ruby slippers worn by Judy Garland in The Wizard Of Oz , and

10528-473: The nation, and edify its citizens at the same time. The British scientist James Smithson (1765–1829) left most of his wealth to his nephew Henry James Hungerford. When Hungerford died childless in 1835, the estate passed "to the United States of America, to found at Washington, under the name of the Smithsonian Institution, an Establishment for the increase & diffusion of knowledge among men", in accordance with Smithson's will. Congress officially accepted

10640-605: The opening of the Renwick Gallery in 1972 in the 1874 Renwick-designed art gallery originally built by local philanthropist William Wilson Corcoran to house the Corcoran Gallery of Art . The first new museum building to open since the National Museum of History and Technology was the Hirshhorn Museum and Sculpture Garden , which opened in 1974. The National Air and Space Museum , the Smithsonian's largest in terms of floor space, opened in June 1976. Eleven years later,

10752-788: The organization was granted a charter by Congress on April 20, 1818 (this charter expired in 1838). Benjamin Latrobe , who was architect for the US Capitol after the War of 1812, and William Thornton , the architect who designed the Octagon House and Tudor Place , would serve as officers. Other prominent members, who numbered from 30 to 70 during the institute's existence, included John Quincy Adams , Andrew Jackson , Henry Clay , Judge William Cranch , and James Hoban . Honorary members included James Madison , James Monroe , John Adams , Thomas Jefferson , and

10864-443: The original Teddy Bear that was named after President Theodore Roosevelt . In 2016, the Smithsonian's Air & Space museum curators restored the large model Enterprise from the original Star Trek TV series. Following international debates about the decolonisation of museums and the legal and moral justifications of their acquisitions, the Smithsonian adopted a new "ethical returns policy" on April 29, 2022. This will permit

10976-477: The product or structure receives options to choose an optimum combination from the variety of matrix and strengthening materials. To shape the engineered composites, it must be formed. The reinforcement is placed onto the mould surface or into the mould cavity. Before or after this, the matrix can be introduced to the reinforcement. The matrix undergoes a melding event which sets the part shape necessarily. This melding event can happen in several ways, depending upon

11088-422: The public in their own communities about how Latinos are enriching America's cultural fabric." The institution publishes Smithsonian magazine monthly and Air & Space magazine bimonthly. Smithsonian was the result of Secretary of the Smithsonian S. Dillon Ripley asking the retired editor of Life magazine Edward K. Thompson to produce a magazine "about things in which the Smithsonian Institution

11200-419: The reading of scientific and literary productions, but this was continued for only a short time, as the number attending declined rapidly. Eighty-five communications by 26 people were made to Congress during the entire life of the society, with more than a half relating to astronomy or mathematics. Among all the activities planned by the institute, only a few were actually implemented. Two were the establishment of

11312-640: The staff and unfulfilled financial obligations to sponsors existed. The website's quality was poor, and the center did not have a public affairs manager, a programs director, adequate human resources support, or cohesive mission statement. After difficult times in the first few years, the center improved. According to the Smithsonian, the center "support[s] scholarly research, exhibitions, public and educational programs, web-based content and virtual platforms, and collections and archives. [It] also manage[s] leadership and professional development programs for Latino youth, emerging scholars and museum professionals." Today,

11424-404: The starting raw ingredients. There are several broad categories, each with numerous variations. The most common are known as polyester , vinyl ester , epoxy , phenolic , polyimide , polyamide , polypropylene , PEEK , and others. The reinforcement materials are often fibres but also commonly ground minerals. The various methods described below have been developed to reduce the resin content of

11536-447: The summary of the state-of-the-art techniques for fabrication of the 3D structure of graphene, and the examples of the use of these foam like structures as a core for their respective polymer composites. Although the two phases are chemically equivalent, semi-crystalline polymers can be described both quantitatively and qualitatively as composite materials. The crystalline portion has a higher elastic modulus and provides reinforcement for

11648-473: The thread to screw in the valve. On 5 September 2019, HMD Global unveiled the Nokia 6.2 and Nokia 7.2 which are claimed to be using polymer composite for the frames. Composite materials are created from individual materials. These individual materials are known as constituent materials, and there are two main categories of it. One is the matrix ( binder ) and the other reinforcement . A portion of each kind

11760-467: The time it went public. This included 192 gifts of at least $ 1 million. Members of the boards of directors of various Smithsonian museums donated $ 372 million. The Smithsonian said that funds raised would go toward completion of the National Museum of African American History and Culture building, and renovations of the National Air and Space Museum , National Museum of American History , and

11872-546: The website features a high-tech virtual museum including self-guided virtual tours of past and present exhibits. The Smithsonian Latino Center's Young Ambassadors Program (YAP) is a program within the Latino Center that reaches out to Latino high school students with the goal of encouraging them to become leaders in arts, sciences, and the humanities. Students selected for the program travel to Washington, D.C. for an "enrichment seminar" that lasts approximately five days. Afterwards, students return to their communities to serve in

11984-414: The wings and fuselage are composed largely of composites. Composite materials are also becoming more common in the realm of orthopedic surgery , and it is the most common hockey stick material. Carbon composite is a key material in today's launch vehicles and heat shields for the re-entry phase of spacecraft . It is widely used in solar panel substrates, antenna reflectors and yokes of spacecraft. It

12096-821: Was appropriated for meteorological research. The institution became a magnet for young scientists from 1857 to 1866, who formed a group called the Megatherium Club . The Smithsonian played a critical role as the US partner institution in early bilateral scientific exchanges with the Academy of Sciences of Cuba . Construction began on the Smithsonian Institution Building ("the Castle") in 1849. Designed by architect James Renwick Jr. , its interiors were completed by general contractor Gilbert Cameron. The building opened in 1855. The Smithsonian's first expansion came with

12208-442: Was documented by Egyptian tomb paintings . Wattle and daub is one of the oldest composite materials, at over 6000 years old. Concrete is also a composite material, and is used more than any other synthetic material in the world. As of 2009 , about 7.5 billion cubic metres of concrete are made each year Concrete is the most common artificial composite material of all and typically consists of loose stones (aggregate) held with

12320-548: Was established as a trust instrumentality by act of Congress. More than two-thirds of the Smithsonian's workforce of some 6,300 persons are employees of the federal government. The Smithsonian Institution Office of Protection Services oversees security at the Smithsonian facilities and enforces laws and regulations for National Capital Parks together with the United States Park Police . The president's 2011 budget proposed just under $ 800 million in support for

12432-518: Was initially standard equipment) and after 2008 the SR22 was sold with only the Perspective panel. In 2009, the third-generation Cirrus SR22 GTS came equipped with a new enhanced vision system (EVS), a sophisticated dual-wavelength instrument that offers both infrared and synthetic vision . At the 2010 EAA AirVenture , Cirrus announced its plans to certify Garmin's ESP system (Electronic Stability and Protection, similar to ESPs in automobiles ) on

12544-826: Was originally organized as the United States National Museum , but that name ceased to exist administratively in 1967. The Smithsonian Institution has historical holdings of over 157 million items, 21 museums, 21 libraries, 14 education and research centers, a zoo, and historical and architectural landmarks, mostly located in Washington, D.C. Additional facilities are located in Maryland , New York , and Virginia . More than 200 institutions and museums in 47 states , Puerto Rico , and Panama are Smithsonian Affiliates . Institution publications include Smithsonian and Air & Space magazines. Almost all of

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