85-472: The Cessna Skymaster is an American twin-engine civil utility aircraft built in a push-pull configuration . Its engines are mounted in the nose and rear of its pod-style fuselage. Twin booms extend aft of the wings to the vertical stabilizers , with the rear engine between them. The horizontal stabilizer is aft of the pusher propeller , mounted between and connecting the two booms. The combined tractor and pusher engines produce centerline thrust and
170-404: A combustion chamber , and accelerate the exhaust rearwards to provide thrust. Different jet engine configurations include the turbojet and turbofan , sometimes with the addition of an afterburner . Those with no rotating turbomachinery include the pulsejet and ramjet . These mechanically simple engines produce no thrust when stationary, so the aircraft must be launched to flying speed using
255-433: A lifting gas such as helium , hydrogen or hot air , which is less dense than the surrounding air. When the weight of the lifting gas is added to the weight of the aircraft itself, it is same or less than the mass of the air that the craft displaces. Small hot-air balloons, called sky lanterns , were first invented in ancient China prior to the 3rd century BC and used primarily in cultural celebrations, and were only
340-586: A physician and a rescue swimmer . The Estonian Border Guard (Piirivalve) is the Estonian security authority responsible for the border security. It is the main support organisation for search and rescue missions in Estonia, and operates a small fleet of SAR vessels and helicopters. In Finland local rescue services (i.e. fire departments) are responsible for land and inland water SAR, the Border Guard
425-727: A 24/7 basis at Holzdorf Air Base with the Airbus H145 LUH SAR (Light Utility Helikopter Search and Rescue) and at Nörvenich Air Base and 2 at Niederstetten Army Airfield. Further, the Technisches Hilfswerk is a key component of the German disaster relief framework. It is, among other things, regularly involved in urban search and rescue efforts abroad. SAR operations are conducted by the Government Flying Service (GFS) and before 1993 by
510-560: A catapult, like the V-1 flying bomb , or a rocket, for example. Other engine types include the motorjet and the dual-cycle Pratt & Whitney J58 . Compared to engines using propellers, jet engines can provide much higher thrust, higher speeds and, above about 40,000 ft (12,000 m), greater efficiency. They are also much more fuel-efficient than rockets . As a consequence nearly all large, high-speed or high-altitude aircraft use jet engines. Some rotorcraft, such as helicopters , have
595-406: A conventional twin-engine aircraft, primarily in that if an engine fails, the plane will not yaw toward that engine. Without the issue of differential thrust inherent to conventional (engine-on-wing) twins, engine failure on takeoff will not produce yaw from the runway heading. With no one-engine-out minimum controllable speed (Vmc), in-flight control at any flying speed with an engine inoperative
680-632: A dorsal air scoop for the rear engine. (The "Super" prefix was subsequently dropped from the name.) In 1966, the turbocharged T337 was introduced, and in 1973, the pressurized P337G entered production. Cessna built 2993 Skymasters of all variants, including 513 military O-2 versions. Production in America ended in 1982, but was continued by Reims in France, with the FTB337 STOL and the military FTMA Milirole . The Skymaster handles differently from
765-429: A few months prior to the actual calendar year. Data from Jane's All The World's Aircraft 1969–70 General characteristics Performance Related development Aircraft of comparable role, configuration, and era Aircraft An aircraft ( pl. : 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
850-638: A greater wingspan (94m/260 ft) than any current aircraft and a tail height equal to the tallest (Airbus A380-800 at 24.1m/78 ft) — flew only one short hop in the late 1940s and never flew out of ground effect . The largest civilian airplanes, apart from the above-noted An-225 and An-124, are the Airbus Beluga cargo transport derivative of the Airbus A300 jet airliner, the Boeing Dreamlifter cargo transport derivative of
935-402: A location where they cannot be found or, less commonly, due to abduction . Ground search and rescue missions that occur in urban areas should not be confused with "urban search and rescue", which in many jurisdictions refers to the location and extraction of people from collapsed buildings or other entrapments. In some countries, the police are the primary agency for carrying out searches for
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#17327763236671020-674: A marginal case. The forerunner of the fixed-wing aircraft is the kite . Whereas a fixed-wing aircraft relies on its forward speed to create airflow over the wings, a kite is tethered to the ground and relies on the wind blowing over its wings to provide lift. Kites were the first kind of aircraft to fly and were invented in China around 500 BC. Much aerodynamic research was done with kites before test aircraft, wind tunnels , and computer modelling programs became available. The first heavier-than-air craft capable of controlled free-flight were gliders . A glider designed by George Cayley carried out
1105-794: A maximum loaded weight of 550–700 t (1,210,000–1,540,000 lb), it was also the heaviest aircraft built to date. It could cruise at 500 mph (800 km/h; 430 kn). The aircraft was destroyed during the Russo-Ukrainian War . The largest military airplanes are the Ukrainian Antonov An-124 Ruslan (world's second-largest airplane, also used as a civilian transport), and American Lockheed C-5 Galaxy transport, weighing, loaded, over 380 t (840,000 lb). The 8-engine, piston/propeller Hughes H-4 Hercules "Spruce Goose" — an American World War II wooden flying boat transport with
1190-518: A missing person on land. Some places have voluntary search and rescue teams that can be called out to assist these searches. Search and rescue agencies may contain small specialist teams for executing operations where there are specific environmental risks. Examples include swift water rescue, flood response, technical rope rescue, confined space rescue, over-snow rescue, and thin ice rescue. Mountain rescue relates to search and rescue operations specifically in rugged and mountainous terrain. Cave rescue
1275-569: A payload of up to 22,050 lb (10,000 kg). The largest aircraft by weight and largest regular fixed-wing aircraft ever built, as of 2016 , was the Antonov An-225 Mriya . That Soviet-built ( Ukrainian SSR ) six-engine transport of the 1980s was 84 m (276 ft) long, with an 88 m (289 ft) wingspan. It holds the world payload record, after transporting 428,834 lb (194,516 kg) of goods, and has flown 100 t (220,000 lb) loads commercially. With
1360-588: A powered "tug" aircraft. For a glider to maintain its forward air speed and lift, it must descend in relation to the air (but not necessarily in relation to the ground). Many gliders can "soar", i.e. , gain height from updrafts such as thermal currents. The first practical, controllable example was designed and built by the British scientist and pioneer George Cayley , whom many recognise as the first aeronautical engineer. Common examples of gliders are sailplanes , hang gliders and paragliders . Balloons drift with
1445-491: A powered rotary wing or rotor , where the rotor disc can be angled slightly forward so that a proportion of its lift is directed forwards. The rotor may, like a propeller, be powered by a variety of methods such as a piston engine or turbine. Experiments have also used jet nozzles at the rotor blade tips . Aircraft are designed according to many factors such as customer and manufacturer demand, safety protocols and physical and economic constraints. For many types of aircraft
1530-577: A rigid basket or gondola slung below it to carry its payload. Early aircraft, including airships , often employed flexible doped aircraft fabric covering to give a reasonably smooth aeroshell stretched over a rigid frame. Later aircraft employed semi- monocoque techniques, where the skin of the aircraft is stiff enough to share much of the flight loads. In a true monocoque design there is no internal structure left. The key structural parts of an aircraft depend on what type it is. Lighter-than-air types are characterised by one or more gasbags, typically with
1615-420: A supporting structure of flexible cables or a rigid framework called its hull. Other elements such as engines or a gondola may also be attached to the supporting structure. Heavier-than-air types are characterised by one or more wings and a central fuselage . The fuselage typically also carries a tail or empennage for stability and control, and an undercarriage for takeoff and landing. Engines may be located on
1700-605: A unique sound. The Cessna O-2 Skymaster is a military version of the Cessna Model 337 Super Skymaster. The first Skymaster, Model 336 Skymaster, had fixed landing gear and initially flew on February 28, 1961. It went into production in May 1963 with 195 being produced through mid-1964. In February 1965, Cessna introduced the Model 337 Super Skymaster. The model was larger, and had more powerful engines, retractable landing gear, and
1785-522: Is a lifting body , which has no wings, though it may have small stabilizing and control surfaces. Wing-in-ground-effect vehicles are generally not considered aircraft. They "fly" efficiently close to the surface of the ground or water, like conventional aircraft during takeoff. An example is the Russian ekranoplan nicknamed the " Caspian Sea Monster ". Man-powered aircraft also rely on ground effect to remain airborne with minimal pilot power, but this
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#17327763236671870-584: Is a highly specialised form of rescue for rescuing injured, trapped or lost cave explorers. Urban search and rescue (US&R or USAR), also referred to as Heavy Urban Search and Rescue (HUSAR), is the location and rescue of persons from collapsed buildings or other urban and industrial entrapments. Due to the specialised nature of the work, most teams are multi-disciplinary and include personnel from police, fire and emergency medical services. Unlike traditional ground search and rescue workers, most US&R responders also have basic training in structural collapse and
1955-437: Is a powered one. A powered, steerable aerostat is called a dirigible . Sometimes this term is applied only to non-rigid balloons, and sometimes dirigible balloon is regarded as the definition of an airship (which may then be rigid or non-rigid). Non-rigid dirigibles are characterized by a moderately aerodynamic gasbag with stabilizing fins at the back. These soon became known as blimps . During World War II , this shape
2040-433: Is carried out at sea to save sailors and passengers in distress, or the survivors of downed aircraft. The type of agency which carries out maritime search and rescue varies by country; it may variously be the coast guard , navy or voluntary organisations. When a distressed or missing vessel is located, these organisations deploy helicopters, rescue vessels or any other appropriate vessel to return them to land. In some cases,
2125-919: Is conducted by the German Maritime Search and Rescue Service with air support by the German Navy , the Federal Police and the German Army Aviation . All incoming requests are coordinated by the Maritime Rescue Coordination Center in Bremen . The DGzRS is a non-governmental organisation entirely supported by donations. Besides the offshore Search And Rescue services, the German Army Aviation provides 3 SAR Command Posts on
2210-1085: Is normally called the powerplant , and includes engine or motor , propeller or rotor , (if any), jet nozzles and thrust reversers (if any), and accessories essential to the functioning of the engine or motor (e.g.: starter , ignition system , intake system , exhaust system , fuel system , lubrication system, engine cooling system , and engine controls ). Powered aircraft are typically powered by internal combustion engines ( piston or turbine ) burning fossil fuels —typically gasoline ( avgas ) or jet fuel . A very few are powered by rocket power , ramjet propulsion, or by electric motors , or by internal combustion engines of other types, or using other fuels. A very few have been powered, for short flights, by human muscle energy (e.g.: Gossamer Condor ). The avionics comprise any electronic aircraft flight control systems and related equipment, including electronic cockpit instrumentation, navigation, radar , monitoring, and communications systems . Search and rescue Search and rescue ( SAR )
2295-579: Is not as critical as it is with engines on the wing with the associated leverage; however, performance in speed and, particularly, rate of climb are affected. Flying a Skymaster requires a pilot to hold a multiengine rating, although many countries issue a special "centerline thrust rating" for the Skymaster and other similarly configured aircraft. Ground handling requires certain attention and procedures. The rear engine tends to overheat and can quit while taxiing on very hot days. Accidents have occurred when
2380-452: Is only because they are so underpowered—in fact, the airframe is capable of flying higher. Rotorcraft, or rotary-wing aircraft, use a spinning rotor with aerofoil cross-section blades (a rotary wing ) to provide lift. Types include helicopters , autogyros , and various hybrids such as gyrodynes and compound rotorcraft. Helicopters have a rotor turned by an engine-driven shaft. The rotor pushes air downward to create lift. By tilting
2465-799: Is organised by the Cyprus Joint Rescue Coordination Center (JRCC Larnaca). The JRCC (Greek: Κέντρο Συντονισμού Έρευνας και Διάσωσης) is an independent agency of the Ministry of Defence of the Republic of Cyprus that started its operations on a 24h basis on 7 August 1995 as a unit of the Cyprus Air Force Command . On 1 March 2002, the JRCC took full responsibility for investigating, organising, coordinating and executing every SAR incident-operation in
2550-820: Is provided by three authorities; the Joint Rescue Coordination Centre (JRCC) at the Australian Maritime Safety Authority (AMSA), the Australian Defence Force (ADF) and the State/Territory Police Jurisdictions. In a very broad sense, the JRCC respond to national and international registered aircraft, off shore marine incidents and beacon activations. The ADF are responsible for Australian and foreign military personnel, vehicles, vessels and aircraft while within
2635-860: Is responsible for maritime areas. These organisations alert and decide on the most suitable response for the location and situation. The country also has several volunteer organisations such as the volunteer fire department (VPK), the Finnish Lifeboat Institution (SMPS) and the Red Cross Finland (SPR). The Société Nationale de Sauvetage en Mer (SNSM) provides sea rescue on the French coast and at seas. In 2016, they helped 7,500 people in 5,200 rescues. The service has 41 all-weather rescue boats, 34 first-class rescue boats and 76 second-class lifeboats. In France, Search and rescue operations are led by different entities according to
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2720-623: Is stored in tanks, usually in the wings but larger aircraft also have additional fuel tanks in the fuselage . Propeller aircraft use one or more propellers (airscrews) to create thrust in a forward direction. The propeller is usually mounted in front of the power source in tractor configuration but can be mounted behind in pusher configuration . Variations of propeller layout include contra-rotating propellers and ducted fans . Many kinds of power plant have been used to drive propellers. Early airships used man power or steam engines . The more practical internal combustion piston engine
2805-475: Is the Lockheed SR-71 Blackbird , a U.S. reconnaissance jet fixed-wing aircraft, having reached 3,530 km/h (2,193 mph) on 28 July 1976. Gliders are heavier-than-air aircraft that do not employ propulsion once airborne. Take-off may be by launching forward and downward from a high location, or by pulling into the air on a tow-line, either by a ground-based winch or vehicle, or by
2890-817: Is the framework document that funds international SAR activities. The Canadian Forces have five assigned SAR squadrons: Plus three Combat Support Squadrons with SAR roles: Some municipalities and provinces have their own SAR units: There are also volunteer non-profit associations that conduct SAR in Canada: In Croatia the SAR Service is part of the Croatian Navy and the Croatian Coast Guard with their headquarter in Rijeka . The Cyprus Republic Search and Rescue (SAR) system
2975-431: Is the search for and provision of aid to people who are in distress or imminent danger. The general field of search and rescue includes many specialty sub-fields, typically determined by the type of terrain the search is conducted over. These include mountain rescue ; ground search and rescue, including the use of search and rescue dogs (such as K9 units ); urban search and rescue in cities; combat search and rescue on
3060-629: The Bell Boeing V-22 Osprey ), tiltwing , tail-sitter , and coleopter aircraft have their rotors/ propellers horizontal for vertical flight and vertical for forward flight. The smallest aircraft are toys/recreational items, and nano aircraft . The largest aircraft by dimensions and volume (as of 2016) is the 302 ft (92 m) long British Airlander 10 , a hybrid blimp, with helicopter and fixed-wing features, and reportedly capable of speeds up to 90 mph (140 km/h; 78 kn), and an airborne endurance of two weeks with
3145-693: The Boeing 747 jet airliner/transport (the 747-200B was, at its creation in the 1960s, the heaviest aircraft ever built, with a maximum weight of over 400 t (880,000 lb)), and the double-decker Airbus A380 "super-jumbo" jet airliner (the world's largest passenger airliner). The fastest fixed-wing aircraft and fastest glider, is the Space Shuttle , which re-entered the atmosphere at nearly Mach 25 or 17,500 mph (28,200 km/h) The fastest recorded powered aircraft flight and fastest recorded aircraft flight of an air-breathing powered aircraft
3230-647: The Cospas-Sarsat distress beacon detection system. The JRCC's jurisdiction spans Australia and as well as covering 52.8 million square kilometres of the Indian , Pacific and Southern Oceans constituting about 11% of the Earth's surface. The JRCC is staffed by SAR specialists who have a naval, merchant marine , air force, civil aviation or police service background. The JRCC also coordinates medical evacuations, broadcasts maritime safety information and operates
3315-709: The Cuban exile group Hermanos al Rescate (Brothers to the Rescue) used Skymasters, among other aircraft, to fly search and rescue missions over the Florida Straits looking for rafters attempting to cross the straits to defect from Cuba, and when they found them, dropped life-saving supplies to them. Rescues were coordinated with the US Coast Guard , which worked closely with the group. They chose Skymasters because their high wing offered better visibility of
3400-1374: The Cyprus Port and Naval Police , the Cyprus National Guard Naval Command , the Cyprus National Guard Air Force Command , the Cyprus Civil Defence and other secondary units. The JRCC reports directly to the operational control of the Ministry of Defence and it is staffed by qualified personnel of the Cyprus National Guard , mainly from the branches of the Navy and the Air Force . There are also search and rescue teams in Northern Cyprus . Search and rescue operators in Turkish Republic of North Cyprus are primarily: Military Search and rescue operators in Denmark are primarily: Danish air force Squadron 722, Danish navy air squadron , naval home guard and
3485-828: The Danish Maritime Safety Administration , coordinated by the Joint Rescue Coordination Centre, operated by the navy and air force in the Danish Naval Commands facilities near Aarhus . Internationally the Danish works mainly with Germany , Norway and Sweden . With the two latter, the annual exercises Baltic SAREX and Scan-SAR are conducted. SAR services in Denmark started in 1957 with seven Sikorsky S-55s . Their piston engines produced only 550 hp (410 kW) and they had limited fuel capacity, so their operational range
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3570-637: The Harrier jump jet and Lockheed Martin F-35B take off and land vertically using powered lift and transfer to aerodynamic lift in steady flight. A pure rocket is not usually regarded as an aerodyne because its flight does not depend on interaction with the air at all (and thus can even fly in the vacuum of outer space ); however, many aerodynamic lift vehicles have been powered or assisted by rocket motors. Rocket-powered missiles that obtain aerodynamic lift at very high speed due to airflow over their bodies are
3655-763: The NSW SES Bush Search and Rescue in New South Wales and Bush Search and Rescue Victoria in Victoria . These state-based groups draw searchers from bushwalking, mountaineering and specialist rescue clubs within their State. A few groups respond on horseback as mounted search and rescue . The State Emergency Service is a collection of volunteer-based emergency organisations established in each state or territory which are responsible for many rescue efforts in urban and rural areas and in any rescue that results from flood or storm activity. In rural areas
3740-853: The North Sea are executed by the Belgian Air Component . From its Koksijde Air Base it operates NH-90 helicopters. Search and rescue duties in Brazil are the responsibility of the Salvarmar Brasil (MRCC Brazil), of the Brazilian Navy and Divisão de Busca e Salvamento (D-SAR) (English: Search and Rescue Division), of the Brazilian Air Force . Air and marine Search and rescue duties in Canada are
3825-770: The dynamic lift of an airfoil , or, in a few cases, direct downward thrust from its 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 , whereas 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 (if any), usage and others. Flying model craft and stories of manned flight go back many centuries; however,
3910-435: The 1930s, large intercontinental flying boats were also sometimes referred to as "ships of the air" or "flying-ships". — though none had yet been built. The advent of powered balloons, called dirigible balloons, and later of rigid hulls allowing a great increase in size, began to change the way these words were used. Huge powered aerostats, characterized by a rigid outer framework and separate aerodynamic skin surrounding
3995-610: The Australian SRR. Police are responsible for coastal marine incidents, lost persons, unregistered aircraft, inland waterways, ports and identified beacons. The JRCC operates a 24-hour Rescue Coordination Centre (RCC) in Canberra and is responsible for the national coordination of both maritime and aviation search and rescue. The JRCC is also responsible for the management and operation of the Australian ground segment of
4080-645: The Australian Ship Reporting System (AUSREP). In coordinating search and rescue missions, the JRCC will call on assistance from organisations as appropriate, such as the Defence forces, Border Protection Command , trained aviation organisations (Civil SAR Units), emergency medical helicopters, state Police services and trained Air Observers from the State Emergency Service . There are also other organisations, such as
4165-638: The Cyprus Republic Search And Rescue system, to co-ordinate, control and direct SAR operations in its area of responsibility (which is identical to the Nicosia FIR ), in order to find and rescue people whose lives are at risk, as a result of an air or naval accident, in the least possible time. This is achieved by coordinating all the different agencies involved such as the Cyprus Police Aviation Unit,
4250-634: The Reims-Cessna FTB 337G 'Lynx' was the main light attack aircraft used by Rhodesian Security Forces during Fire Force counterinsurgency air assault missions, which began in 1974. The Lynxes were armed with twin Browning .303 machine guns mounted above the wing and 37mm SNEB rockets, locally made Mini "Alpha" Bombs ( cluster bombs ), Mini "Golf" Bombs (450 lb (200 kg) blast and shrapnel bomb) and Frantan (a napalm variant carried in frangible drop tanks) bombs. From 1991 until 2001
4335-456: The Republic of Cyprus Search & Rescue Region (SRR). JRCC Larnaca operated as a military unit until 26 July 2010, when JRCC was transformed to an independent agency under the Ministry of Defence with the Minister being responsible for its operational aspects. Logistic and technical support is the responsibility of the Ministry of Communications & Works. Its primary mission is to organise
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#17327763236674420-809: The SES conducts most bush search, vertical and road traffic rescues. In urban areas they assist the police and fire services with USAR. Search and rescue operations in Azerbaijan are managed by the Ministry of Emergency Situations onshore in cooperation with the State Civil Aviation Administration in air and the State Maritime Administration offshore. Search and rescue duties along the Belgian part of
4505-507: The agencies may carry out an air-sea rescue (ASR). This refers to the combined use of aircraft (such as flying boats , floatplanes , amphibious helicopters and non-amphibious helicopters equipped with hoists) and surface vessels. Another type of Maritime search and rescue is Submarine rescue . The International Convention on Maritime Search and Rescue (SAR Convention) is the legal framework that applies to international maritime and air-sea rescue. The Australian search and rescue service
4590-470: The aircraft's weight. There are two ways to produce dynamic upthrust — aerodynamic lift by having air flowing past an aerofoil (such dynamic interaction of aerofoils with air is the origin of the term "aerodyne"), or powered lift in the form of reactional lift from downward engine thrust . Aerodynamic lift involving wings is the most common, and can be achieved via two methods. Fixed-wing aircraft ( airplanes and gliders ) achieve airflow past
4675-501: The autogyro moves forward, air blows upward across the rotor, making it spin. This spinning increases the speed of airflow over the rotor, to provide lift. Rotor kites are unpowered autogyros, which are towed to give them forward speed or tethered to a static anchor in high-wind for kited flight. Compound rotorcraft have wings that provide some or all of the lift in forward flight. They are nowadays classified as powered lift types and not as rotorcraft. Tiltrotor aircraft (such as
4760-428: The battlefield and air-sea rescue over water. International Search and Rescue Advisory Group (INSARAG) is a UN organisation that promotes the exchange of information between national urban search and rescue organisations. The duty to render assistance is covered by Article 98 of the UNCLOS . There are many different definitions of search and rescue, depending on the agency involved and country in question. One of
4845-412: The cockpit, using an experimental hoist developed jointly by Sikorsky and Breeze . All five crew members of an oil barge, which had run aground on Penfield Reef , were saved before the barge sank. In 1983, Korean Air Lines Flight 007 with 269 occupants was shot down by a Soviet aircraft near Sakhalin . The Soviets sent SAR helicopters and boats to Soviet waters, while a search and rescue operation
4930-474: The dangers associated with live electrical wires, broken natural gas lines and other hazards. While earthquakes have traditionally been the cause of US&R operations, terrorist attacks and extreme weather such as tornadoes and hurricanes have also resulted in the deployment of these resources. Combat search and rescue (CSAR) is search and rescue operations that are carried out during war that are within or near combat zones. Maritime search and rescue
5015-435: The design process is regulated by national airworthiness authorities. The key parts of an aircraft are generally divided into three categories: The approach to structural design varies widely between different types of aircraft. Some, such as paragliders, comprise only flexible materials that act in tension and rely on aerodynamic pressure to hold their shape. A balloon similarly relies on internal gas pressure, but may have
5100-477: The first manned ascent — and safe descent — in modern times took place by larger hot-air balloons developed in the 18th century. Each of the two World Wars led to great technical advances. Consequently, the history of aircraft can be divided into five eras: Lighter-than-air aircraft or aerostats use buoyancy to float in the air in much the same way that ships float on the water. They are characterized by one or more large cells or canopies, filled with
5185-532: The first true manned, controlled flight in 1853. The first powered and controllable fixed-wing aircraft (the airplane or aeroplane) was invented by Wilbur and Orville Wright . Besides the method of propulsion (if any), fixed-wing aircraft are in general characterized by their wing configuration . The most important wing characteristics are: A variable geometry aircraft can change its wing configuration during flight. A flying wing has no fuselage, though it may have small blisters or pods. The opposite of this
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#17327763236675270-402: The front propeller and over the airframe while its front tractor propeller addresses undisturbed air. From 1976 until the middle 1990s, the California Department of Forestry and Fire Protection used O-2 variants of the 337 Skymaster as tactical aircraft during firefighting operations. These were replaced with North American OV-10 Broncos , starting in 1993. During the Rhodesian Bush War ,
5355-418: The fuselage or wings. On a fixed-wing aircraft the wings are rigidly attached to the fuselage, while on a rotorcraft the wings are attached to a rotating vertical shaft. Smaller designs sometimes use flexible materials for part or all of the structure, held in place either by a rigid frame or by air pressure. The fixed parts of the structure comprise the airframe . The source of motive power for an aircraft
5440-400: The gas bags, were produced, the Zeppelins being the largest and most famous. There were still no fixed-wing aircraft or non-rigid balloons large enough to be called airships, so "airship" came to be synonymous with these aircraft. Then several accidents, such as the Hindenburg disaster in 1937, led to the demise of these airships. Nowadays a "balloon" is an unpowered aerostat and an "airship"
5525-590: The initial SAR effort, which was fruitless. In June 2014, the Australian Transport Safety Bureau commissioned the MV Fugro Equator to lead a three-month survey of the ocean bed. As of 2014 , the search for Flight 370 had become the largest SAR to date. Ground search and rescue is the search for persons who are lost or in distress on land or inland waterways. People may go missing for a variety of reasons. Some may disappear voluntarily, due to issues like domestic abuse . Others disappear for involuntary reasons such as mental illness, getting lost, an accident, death in
5610-419: The naval vessels at sea. The EH-101s operate from bases in Aalborg , Skrydstrup and Roskilde . When the sea water temperatures are low a helicopter is also deployed to the island of Bornholm in the Baltic Sea . The Lynx operates from Karup . Maritime vessels are spread out through the entire coastline and on islands. The S-61s and EH-101s have a crew of six: two pilots , a navigator , a flight engineer ,
5695-558: The non-profit Westpac Life Saver Rescue Helicopter Service that is based at a number of sites around Australia and contracted by various authorities to deliver search and rescue services. State Police in many states operate state-based search and rescue squads, such as the Victoria Police Search and Rescue Squad , which provides specialist expertise, advice and practical assistance in land search and rescue on most terrain including snow and vertical cliff search and rescue. There are also state-based volunteer search and rescue groups such as
5780-496: The provision of maritime SAR is assigned to the Minister of Fisheries and Oceans by the Canada Shipping Act and the Canada Oceans Act . Ground and inland water search and rescue (GSAR) is the responsibility of provinces and territories with the Royal Canadian Mounted Police (RCMP) and other police forces coordinating operations, often using volunteer GSAR teams operating in specific areas under provincial coordinating bodies. The Canada Shipping Act, most recently passed in 2001,
5865-403: The rescue area. For sea rescue, the French navy use airborne unit (e.g. Flottille 33F in Brittany) and specialized boats (e.g. "L'abeille Bourbon"). In Mountains, French gendarmerie is equipped with EC-145 'chouka'. In the other areas, French civil protection agency "Securité Civile" works with paramedics, fire unit and hospital mobile unit using EC-145 'Dragon'. Search and Rescue in German waters
5950-429: The responsibility of the Canadian Forces and Canadian Coast Guard in conjunction with volunteer organisations. The Department of National Defence (DND) has overall responsibility for the coordinated search and rescue system. SAR operations are organised by Joint Rescue Coordination Centres (JRCC). The JRCC are staffed 24 hours a day by SAR Co-ordinators from the Canadian Coast Guard and Canadian Forces. Authority for
6035-411: The rotor forward, the downward flow is tilted backward, producing thrust for forward flight. Some helicopters have more than one rotor and a few have rotors turned by gas jets at the tips. Some have a tail rotor to counteract the rotation of the main rotor, and to aid directional control. Autogyros have unpowered rotors, with a separate power plant to provide thrust. The rotor is tilted backward. As
6120-454: The runway is shorter than the single-engine take-off roll and pilots, unaware of a rear engine shutdown, have attempted take-off on the nose engine alone. Federal Aviation Administration Airworthiness Directive 77-08-05 prohibits single-engine take-offs and requires the installation of a placard marked "DO NOT INITIATE SINGLE ENGINE TAKEOFF". The Skymaster's unique sound is made by its rear pusher propeller slicing through turbulent air from
6205-436: The second type of aircraft to fly, the first being kites , which were also first invented in ancient China over two thousand years ago (see Han Dynasty ). A balloon was originally any aerostat, while the term airship was used for large, powered aircraft designs — usually fixed-wing. In 1919, Frederick Handley Page was reported as referring to "ships of the air," with smaller passenger types as "Air yachts." In
6290-810: The ships patrolling the North Atlantic, but also supported the S-55s. In 1964–1965 the seven S-55s were replaced with eight Sikorsky S-61A helicopters. In 2007, the Danish Defence held a public display in Horsens , to raise awareness about rescue services and maritime safety. Maritime SAR is important because Denmark has a relative long coast line to its land mass. In 2008, the SAR forces in Denmark were equipped with eight EH-101, one or two Lynx, 34 naval home guard vessels and 21 rescue vessels, as well as
6375-530: The tether or kite line ; they rely on virtual or real wind blowing over and under them to generate lift and drag. Kytoons are balloon-kite hybrids that are shaped and tethered to obtain kiting deflections, and can be lighter-than-air, neutrally buoyant, or heavier-than-air. Powered aircraft have one or more onboard sources of mechanical power, typically aircraft engines although rubber and manpower have also been used. Most aircraft engines are either lightweight reciprocating engines or gas turbines . Engine fuel
6460-706: The waters below, they were reliable and easy to fly for long-duration missions (averaging 7 hours), and they added a margin of safety with twin-engine centerline thrust. In 1996, two of the Brothers to the Rescue Skymasters were shot down by the Cuban Air Force over international waters. Both aircraft were downed by a MiG-29 , while a second jet fighter, a MiG-23 , orbited nearby. Cessna has historically used model years similar to U.S. auto manufacturers, with sales of new models typically starting
6545-460: The wind, though normally the pilot can control the altitude, either by heating the air or by releasing ballast, giving some directional control (since the wind direction changes with altitude). A wing-shaped hybrid balloon can glide directionally when rising or falling; but a spherically shaped balloon does not have such directional control. Kites are aircraft that are tethered to the ground or other object (fixed or mobile) that maintains tension in
6630-431: The wing. A flexible wing is a wing made of fabric or thin sheet material, often stretched over a rigid frame, similar to the flight membranes on many flying and gliding animals . A kite is tethered to the ground and relies on the speed of the wind over its wings, which may be flexible or rigid, fixed, or rotary. With powered lift, the aircraft directs its engine thrust vertically downward. V/STOL aircraft, such as
6715-402: The wings by having the entire aircraft moving forward through the air, while rotorcraft ( helicopters and autogyros ) do so by having mobile, elongated wings spinning rapidly around a mast in an assembly known as the rotor . As aerofoils, there must be air flowing over the wing to create pressure difference between above and below, thus generating upward lift over the entire wetted area of
6800-477: The world's earliest well-documented SAR efforts ensued following the 1656 wreck of the Dutch merchant ship Vergulde Draeck off the west coast of Australia . Survivors sought help, and in response three separate SAR missions were conducted, without success. On 29 November 1945, a Sikorsky R-5 performed the first civilian helicopter rescue operation in history, with Sikorsky's chief pilot Dmitry "Jimmy" Viner in
6885-549: Was initiated by U.S., South Korean, and Japanese ships and aircraft in international waters, but no survivors were found. In July 2009, Air France Flight 447 was lost in the middle of the Atlantic Ocean. An international SAR effort was launched, to no avail. A third effort nearly two years later discovered the crash site and recovered the flight recorders . In early 2014, Malaysia Airlines Flight 370 crashed under mysterious circumstances. Many nations contributed to
6970-675: Was of the NASA X-43 A Pegasus , a scramjet -powered, hypersonic , lifting body experimental research aircraft, at Mach 9.68 or 6,755 mph (10,870 km/h) on 16 November 2004. Prior to the X-43A, the fastest recorded powered airplane flight, and still the record for the fastest manned powered airplane, was the North American X-15 , rocket-powered airplane at Mach 6.7 or 7,274 km/h (4,520 mph) on 3 October 1967. The fastest manned, air-breathing powered airplane
7055-484: Was short. To increase the operational area, Pembroke twin-engined fixed-wing aircraft were employed for search. These aircraft would localise the distressed person(s) and the S-55s would then rescue them. The SAR service was started for respond to fighter-plane crashes as 79 aircraft crashed, with 62 dead, in the period 1950–1955., but civilian SAR duties are also conducted. In 1962, eight ship-based Aérospatiale Alouette IIIs were received. These were primarily meant for
7140-490: Was used for virtually all fixed-wing aircraft until World War II and is still used in many smaller aircraft. Some types use turbine engines to drive a propeller in the form of a turboprop or propfan . Human-powered flight has been achieved, but has not become a practical means of transport. Unmanned aircraft and models have also used power sources such as electric motors and rubber bands. Jet aircraft use airbreathing jet engines , which take in air, burn fuel with it in
7225-439: Was widely adopted for tethered balloons ; in windy weather, this both reduces the strain on the tether and stabilizes the balloon. The nickname blimp was adopted along with the shape. In modern times, any small dirigible or airship is called a blimp, though a blimp may be unpowered as well as powered. Heavier-than-air aircraft or aerodynes are denser than air and thus must find some way to obtain enough lift that can overcome
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