267 relations: Aérospatiale Alouette II, Aérospatiale SA 315B Lama, Abseiling, Aerial crane, Aerial firefighting, Aerial photography, Aerodrome, AeroVelo Atlas, AgustaWestland, AgustaWestland AW109, Air assault, Air medical services, Air Ministry, Airbus Helicopters, Airdrop, Airspeed, Airstrike, Albert Gillis von Baumhauer, Allies of World War II, Alphonse Pénaud, Ambulance, Angle of attack, Anti-submarine warfare, Antoinette (manufacturer), Anton Flettner, Ar-Rutbah, Arthur M. Young, Attack helicopter, Austria-Hungary, Autogyro, Autorotation, Avro, Avro 504, Étienne Oehmichen, Backpack helicopter, Bamboo-copter, Baopuzi, Bell 204/205, Bell 30, Bell 47, Bell Aircraft, Bell Helicopter, Blade pitch, Boeing CH-47 Chinook, Breguet-Dorand Gyroplane Laboratoire, Breguet-Richet Gyroplane, British International Helicopters, Brownout (aeronautics), C, Cambridge University Press, ..., Canada, Charles Kaman, Chernobyl disaster, Cierva C.19, Cierva C.30, Cierva C.6, Clutch, Coandă effect, Coaxial rotors, Computer-aided design, Controlled flight into terrain, Cornu helicopter, Corradino D'Ascanio, Course (navigation), Cyclogyro, De Bothezat helicopter, Disk loading, Dissymmetry of lift, Donald F. Lach, Drag (physics), Ducted fan, Dynamic rollover, Electric motor, Electronic news-gathering, Ellehammer helicopter, Emergency medical services, Engelbert Zaschka, Enrico Forlanini, Eurocopter AS350 Écureuil, Farnborough, Hampshire, Fédération Aéronautique Internationale, Fenestron, Film, Fixed-wing aircraft, Flat engine, Flettner Fl 265, Flettner Fl 282, Flight, Flight dynamics, Flight envelope, Focke-Achgelis Fa 223, Focke-Wulf, Focke-Wulf Fw 61, France, French Academy of Sciences, Fuselage, Gas turbine, Ge Hong, Genitive case, George Cayley, George de Bothezat, Gliding, Greek language, Ground loop (aviation), Ground resonance, Guinness World Records, Gustave Trouvé, Gyrodyne, Gyroscope, Helicopter bucket, Helicopter dynamics, Helicopter flight controls, Helicopter height–velocity diagram, Helicopter manufacturer, Helicopter noise reduction, Helicopter rotor, Helicopter Underwater Escape Training, Heliport, Helitack, Henrich Focke, Hermann Ganswindt, Hiller YH-32 Hornet, Hughes OH-6 Cayuse, Human-powered helicopter, Igor I. Sikorsky Human Powered Helicopter Competition, Igor Sikorsky, Intermeshing rotors, Internal combustion engine, Iraq, Jacob Ellehammer, James Gordon Bennett Jr., Ján Bahýľ, Jean Boulet, Jesus nut, Jordan Valley (Middle East), Juan de la Cierva, Kaman Aircraft, Kaman K-225, Kappa, Korean War, Leonardo da Vinci, Lift (force), Lioré et Olivier, List of helicopter airlines, List of rotorcraft, Lost film, Louis Charles Breguet, Low-g condition, Mars Helicopter Scout, Mass production, Max Skladanowsky, Mechanic, Medical evacuation, Meteorology, Mikhail Lomonosov, Mil Mi-26, Mil Mi-8, Mil V-12, Military helicopter, Minigun, Monocopter, Multirotor, Myanmar, NASA, National park, Nazi Germany, Nepal, New York City, Nicolas Florine, Nitrocellulose, NOTAR, Oil platform, Oszkár Asboth, Pascal Chretien, Patent, Paul Cornu, Payload, Petróczy-Kármán-Žurovec, Platt-LePage XR-1, Police aviation, Powertrain, Quadcopter, Raúl Pateras Pescara, Radial engine, Radio-controlled helicopter, Raoul Hafner, Reciprocating engine, Reconnaissance, Recreation, Reflection seismology, Retreating blade stall, Revolutions per minute, Robinson Helicopter Company, Robinson R22, Robinson R44, Rocket launcher, Romanization of Greek, Rotary engine, Rotorcraft, Rudder, Russian Academy of Sciences, Search and rescue, Shetland, Sikorsky CH-53 Sea Stallion, Sikorsky CH-53E Super Stallion, Sikorsky CH-54 Tarhe, Sikorsky H-5, Sikorsky R-4, Sikorsky R-6, Sikorsky S-64 Skycrane, Sikorsky UH-60 Black Hawk, Sint-Genesius-Rode, Slovaks, Sonar, Soviet Union, Speed of sound, Sud Aviation, Sud-Ouest Djinn, Surveillance aircraft, Swashplate (aeronautics), Tail rotor, Tandem rotors, Taoism, Thermographic camera, Thomas Edison, Thrust, Tiltrotor, Tip jet, Tonne, Tourism, Translational lift, Transport, Transverse flow effect, TsAGI, Turboshaft, Turkey (bird), Turn and slip indicator, Twistgrip, United States Army Air Forces, United States Army Aviation Branch, Unmanned aerial vehicle, Utility helicopter, V speeds, Vélizy-Villacoublay, Vietnam War, Von Karman Institute for Fluid Dynamics, Vortex ring, Vortex ring state, Vought-Sikorsky VS-300, VTOL, Wave drag, Westland Lynx, Whiteout (weather), Wildfire suppression, Wire strike protection system, World War I, World War II, Wright brothers, Yitav, 1977 Israeli Air Force Sikorsky CH-53 Sea Stallion crash, 1986 British International Helicopters Chinook crash, 1992 Azerbaijani Mil Mi-8 shootdown, 1997 Israeli helicopter disaster, 2002 Khankala Mi-26 crash, 2009 Pakistan Army Mil Mi-17 crash, 2011 Afghanistan Boeing Chinook shootdown, 9K34 Strela-3. Expand index (217 more) » « Shrink index
The Aérospatiale Alouette II (Lark) is a French light helicopter originally manufactured by Sud Aviation and later Aérospatiale.
The Aérospatiale SA 315B Lama is a French single-engined helicopter developed to meet hot and high operational requirements of the Indian Armed Forces.
An abseil, also called a rappel after its French name, is a controlled descent off a vertical drop, such as a rock face, using a rope.
An aerial crane or flying crane is a helicopter used to lift heavy or awkward loads.
Aerial firefighting is the use of aircraft and other aerial resources to combat wildfires.
Aerial photography (or airborne imagery) is the taking of photographs from an aircraft or other flying object.
An aerodrome (Commonwealth English) or airdrome (American English) is a location from which aircraft flight operations take place, regardless of whether they involve air cargo, passengers, or neither.
The AeroVelo Atlas is a human-powered helicopter (HPH) that was built for AHS International's Igor I. Sikorsky Human Powered Helicopter Competition.
AgustaWestland (branded as Leonardo Helicopters since January 2016) was a helicopter design and manufacturing company.
The AgustaWestland AW109 is a lightweight, twin-engine, eight-seat multi-purpose helicopter built by the Italian manufacturer Leonardo (formerly AgustaWestland, merged into the new Finmeccanica since 2016).
Air assault is the movement of ground-based military forces by vertical take-off and landing (VTOL) aircraft—such as the helicopter—to seize and hold key terrain which has not been fully secured, and to directly engage enemy forces behind enemy lines.
Air medical services is a comprehensive term covering the use of air transportation, airplane or helicopter, to move patients to and from healthcare facilities and accident scenes.
The Air Ministry was a department of the Government of the United Kingdom with the responsibility of managing the affairs of the Royal Air Force, that existed from 1918 to 1964.
Airbus Helicopters SAS (formerly Eurocopter Group) is the helicopter manufacturing division of Airbus.
An airdrop is a type of airlift, developed during World War II to resupply otherwise inaccessible troops, who themselves may have been airborne forces.
Airspeed is the speed of an aircraft relative to the air.
An airstrike or air strike is an offensive operation carried out by attack aircraft.
Albert Gillis von Baumhauer (Heerenveen, October 1891 – Alder, State of Washington, 18 March 1939) was a Dutch aviation pioneer notable for his design of the first Dutch helicopter and the related inventions, in particular the cyclic and collective control, and a single rotor design.
The Allies of World War II, called the United Nations from the 1 January 1942 declaration, were the countries that together opposed the Axis powers during the Second World War (1939–1945).
Alphonse Pénaud (31 May 1850 – 22 October 1880), was a 19th-century French pioneer of aviation design and engineering.
An ambulance is a vehicle for transportation, from or between places of treatment, and in some instances will also provide out of hospital medical care to the patient.
In fluid dynamics, angle of attack (AOA, or \alpha (Greek letter alpha)) is the angle between a reference line on a body (often the chord line of an airfoil) and the vector representing the relative motion between the body and the fluid through which it is moving.
Anti-submarine warfare (ASW, or in older form A/S) is a branch of underwater warfare that uses surface warships, aircraft, or other submarines to find, track and deter, damage, or destroy enemy submarines.
Antoinette was a French manufacturer of light petrol engines.
Anton Flettner (November 1, 1885 – December 29, 1961) was a German aviation engineer and inventor.
Ar-Rutbah (الرطبة, also known as Rutba, Rutbah, Rutbah Wells, or Ar-Rutba) is an Iraqi town in western Al Anbar province, completely inhabited with Sunni Muslims.
Arthur Middleton Young (November 3, 1905 – May 30, 1995) was an American inventor, helicopter pioneer, cosmologist, philosopher, astrologer and author.
An attack helicopter is an armed helicopter with the primary role of an attack aircraft, with the capability of engaging targets on the ground, such as enemy infantry and armored fighting vehicles.
Austria-Hungary, often referred to as the Austro-Hungarian Empire or the Dual Monarchy in English-language sources, was a constitutional union of the Austrian Empire (the Kingdoms and Lands Represented in the Imperial Council, or Cisleithania) and the Kingdom of Hungary (Lands of the Crown of Saint Stephen or Transleithania) that existed from 1867 to 1918, when it collapsed as a result of defeat in World War I. The union was a result of the Austro-Hungarian Compromise of 1867 and came into existence on 30 March 1867.
An autogyro (from Greek αὐτός and γύρος, "self-turning"), also known as a gyroplane or gyrocopter, is a type of rotorcraft that uses an unpowered rotor in free autorotation to develop lift.
Autorotation is a state of flight in which the main rotor system of a helicopter or similar aircraft turns by the action of air moving up through the rotor, as with an autogyro, rather than engine power driving the rotor.
Avro was a British aircraft manufacturer.
The Avro 504 was a First World War biplane aircraft made by the Avro aircraft company and under licence by others.
Étienne Edmond Oehmichen (15 October 1884, in Châlons-sur-Marne Châlons-en-Champagne – 10 July 1955, in Paris) was a French engineer and helicopter designer.
A backpack helicopter is a helicopter motor and rotor and controls assembly that can be strapped to a person's back, so he can walk about on the ground wearing it, and can use it to fly.
The bamboo-copter, also known as the bamboo dragonfly or Chinese top (Chinese zhuqingting (竹蜻蜓), Japanese taketombo 竹蜻蛉), is a toy helicopter rotor that flies up when its shaft is rapidly spun.
The Baopuzi, written by the Jin dynasty scholar Ge Hong 葛洪 (283-343), is divided into esoteric Neipian 內篇 "Inner Chapters" and exoteric Waipian 外篇 "Outer Chapters".
The Bell 204 and 205 are the civilian versions of the UH-1 Iroquois single-engine military helicopter of the Huey family of helicopters.
The Bell 30 was the prototype for the first commercial helicopter, and the first helicopter built by the Bell Aircraft Company.
The Bell 47 is a single rotor single engine light helicopter manufactured by Bell Helicopter.
The Bell Aircraft Corporation was an aircraft manufacturer of the United States, a builder of several types of fighter aircraft for World War II but most famous for the Bell X-1, the first supersonic aircraft, and for the development and production of many important civilian and military helicopters.
Bell Helicopter Textron Inc. is an American aerospace manufacturer headquartered in Fort Worth, Texas.
Blade pitch or simply pitch refers to turning the angle of attack of the blades of a propeller or helicopter rotor into or out of the wind to control the production or absorption of power.
The Boeing CH-47 Chinook is an American twin-engine, tandem-rotor, heavy-lift helicopter developed by American rotorcraft company Vertol and manufactured by Boeing Vertol (later known as Boeing Rotorcraft Systems).
The Gyroplane Laboratoire was an early helicopter.
The Breguet-Richet Gyroplane was an early French experimental quadcopter rotary-wing aircraft developed by Breguet Aviation.
British International Helicopter Services Limited (BIH), owned by Rigby Group PLC, is the largest British-owned helicopter operator and the only domestically-held company in the UK's offshore helicopter / EMS sector.
In aviation, a brownout (or brown-out) is an in-flight visibility restriction due to dust or sand in the air.
C is the third letter in the English alphabet and a letter of the alphabets of many other writing systems which inherited it from the Latin alphabet.
Cambridge University Press (CUP) is the publishing business of the University of Cambridge.
Canada is a country located in the northern part of North America.
Charles Huron Kaman (June 15, 1919 – January 31, 2011) was an American aeronautical engineer, businessman, inventor and philanthropist, known for his work in rotary-wing flight and also in musical instrument design via the Kaman Music Corporation.
The Chernobyl disaster, also referred to as the Chernobyl accident, was a catastrophic nuclear accident.
The Cierva C.19 was a 1930s British two-seat autogyro, designed by Spanish engineer Juan de la Cierva.
The Cierva C.30 was an autogyro designed by Juan de la Cierva and built under licence from the Cierva Autogiro Company by A V Roe & Co Ltd (Avro), Lioré-et-Olivier and Focke-Wulf.
The Cierva C.6 was the sixth autogyro designed by engineer Juan de la Cierva, and the first one to travel a "major" distance.
A clutch is a mechanical device which engages and disengages power transmission especially from driving shaft to driven shaft.
The Coandă effect is the tendency of a fluid jet to stay attached to a convex surface.
Coaxial rotors or "coax rotors" are a pair of helicopter rotors mounted one above the other on concentric shafts, with the same axis of rotation, but turning in opposite directions (contra-rotation).
Computer-aided design (CAD) is the use of computer systems to aid in the creation, modification, analysis, or optimization of a design.
A controlled flight into terrain (CFIT, usually pronounced cee-fit) is an accident in which an airworthy aircraft, under pilot control, is unintentionally flown into the ground, a mountain, a body of water or an obstacle.
The Cornu helicopter was an experimental helicopter built in France, and is widely credited with the first free flight of a rotary-wing aircraft when it took to the air on 13 November 1907.
General Corradino D'Ascanio (February 1, 1891 in Popoli, Pescara – August 6, 1981 in Pisa) was an Italian aeronautical engineer.
In navigation, a vessel's or aircraft's course is the cardinal direction along which the vessel or aircraft is to be steered.
The cyclogyro, or cyclocopter, is an aircraft configuration that uses a horizontal-axis cyclorotor as a rotor wing to provide lift and sometimes also propulsion and control.
The de Bothezat helicopter, also known as the Jerome-de Bothezat Flying Octopus, was an experimental quadrotor helicopter built for the United States Army Air Service by George de Bothezat in the early 1920s, and was said at the time to be the first successful helicopter.
In fluid dynamics, disk loading or disc loading is the average pressure change across an actuator disk, such as an airscrew.
Dissymmetry of lift in rotorcraft aerodynamics refers to an uneven amount of lift on opposite sides of the rotor disc.
Donald Frederick Lach (pronounced "Lach, as in Bach") (September 24, 1917–October 26, 2000) was an American historian based as a professor in the Department of History at the University of Chicago.
In fluid dynamics, drag (sometimes called air resistance, a type of friction, or fluid resistance, another type of friction or fluid friction) is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid.
A ducted fan is a propulsion arrangement whereby a mechanical fan, which is a type of propeller, is mounted within a cylindrical shroud or duct.
A helicopter is susceptible to a rolling tendency, called dynamic rollover, when close to the ground, especially when taking off or landing.
An electric motor is an electrical machine that converts electrical energy into mechanical energy.
Electronic news-gathering (ENG) is when reporters and editors make use of electronic video and audio technologies in order to gather and present news.
The Ellehammer helicopter was an otherwise-unnamed experimental aircraft built in Denmark in 1912.
Emergency medical services, also known as ambulance services or paramedic services (abbreviated to the initialism EMS, EMAS, EMARS or SAMU in some countries), are a type of emergency service dedicated to providing out-of-hospital acute medical care, transport to definitive care, and other medical transport to patients with illnesses and injuries which prevent the patient from transporting themselves.
Engelbert Zaschka (September 1, 1895 in Freiburg im Breisgau, Germany – June 26, 1955 in Freiburg im Breisgau, Germany) was a German chief engineer, chief designer and inventor.
Enrico Forlanini (13 December 1848 – 9 October 1930) was an Italian engineer, inventor and aeronautical pioneer, known for his works on helicopters, aircraft, hydrofoils and dirigibles.
The Eurocopter (now Airbus Helicopters) AS350 Écureuil (Squirrel) (now H125) is a single-engine light utility helicopter originally designed and manufactured in France by Aérospatiale and Eurocopter (now Airbus Helicopters).
Farnborough is a town in north east Hampshire, England, part of the borough of Rushmoor and the Farnborough/Aldershot Built-up Area.
The Fédération aéronautique internationale (FAI; The World Air Sports Federation), is the world governing body for air sports.
A Fenestron (sometimes alternatively referred to as a fantail or a "fan-in-fin" arrangementLeishman 2006, p. 321.) is a protected tail rotor of a helicopter operating like a ducted fan.
A film, also called a movie, motion picture, moving pícture, theatrical film, or photoplay, is a series of still images that, when shown on a screen, create the illusion of moving images.
A fixed-wing aircraft is an aircraft, such as an airplane or aeroplane (note the two different spellings), which is capable of flight using wings that generate lift caused by the vehicle's forward airspeed and the shape of the wings.
A flat engine is an internal combustion engine with horizontally-opposed cylinders.
The Flettner Fl 265 was an experimental helicopter designed by Anton Flettner.
The Flettner Fl 282 Kolibri ("Hummingbird") is a single-seat intermeshing rotor helicopter, or synchropter, produced by Anton Flettner of Germany.
Flight is the process by which an object moves through an atmosphere (or beyond it, as in the case of spaceflight) without contact with the surface.
Flight dynamics is the study of the performance, stability, and control of vehicles flying through the air or in outer space.
In aerodynamics, the flight envelope, service envelope, or performance envelope of an aircraft or interplanetary spacecraft refers to the capabilities of a design in terms of airspeed and load factor or atmospheric density, often simplified to altitude for Earth-borne aircraft.
The Focke-Achgelis Fa 223 Drache (Dragon) was a helicopter developed by Germany during World War II.
Focke-Wulf Flugzeugbau AG was a German manufacturer of civil and military aircraft before and during World War II.
The Focke-Wulf Fw 61 is often considered the first practical, functional helicopter, first flown in 1936.
France, officially the French Republic (République française), is a sovereign state whose territory consists of metropolitan France in Western Europe, as well as several overseas regions and territories.
The French Academy of Sciences (French: Académie des sciences) is a learned society, founded in 1666 by Louis XIV at the suggestion of Jean-Baptiste Colbert, to encourage and protect the spirit of French scientific research.
The fuselage (from the French fuselé "spindle-shaped") is an aircraft's main body section.
A gas turbine, also called a combustion turbine, is a type of continuous combustion, internal combustion engine.
Ge Hong (葛洪; b. 283 - d. 343 or 363) was an Eastern Jin Dynasty scholar, and the author of Essays on Chinese Characters.
In grammar, the genitive (abbreviated); also called the second case, is the grammatical case that marks a word, usually a noun, as modifying another word, also usually a noun.
Sir George Cayley, 6th Baronet (27 December 1773 – 15 December 1857) was an English engineer, inventor, and aviator.
George de Bothezat (italic, italic, June 7, 1882 – February 1, 1940) was a Russian American engineer, businessman, and pioneer of helicopter flight.
Gliding is a recreational activity and competitive air sport in which pilots fly unpowered aircraft known as gliders or sailplanes using naturally occurring currents of rising air in the atmosphere to remain airborne.
Greek (Modern Greek: ελληνικά, elliniká, "Greek", ελληνική γλώσσα, ellinikí glóssa, "Greek language") is an independent branch of the Indo-European family of languages, native to Greece and other parts of the Eastern Mediterranean and the Black Sea.
In aviation, a ground loop is a rapid rotation of a fixed-wing aircraft in the horizontal plane (yawing) while on the ground.
Ground resonance is an imbalance in the rotation of a helicopter rotor when the blades become bunched up on one side of their rotational plane and cause an oscillation in phase with the frequency of the rocking of the helicopter on its landing gear.
Guinness World Records, known from its inception in 1955 until 2000 as The Guinness Book of Records and in previous United States editions as The Guinness Book of World Records, is a reference book published annually, listing world records both of human achievements and the extremes of the natural world.
Gustave Pierre Trouvé (2 January 1839 – 27 July 1902) was a French electrical engineer and inventor in the 19th century.
A gyrodyne is a type of VTOL aircraft with a helicopter rotor-like system that is driven by its engine for takeoff and landing and also includes one or more conventional propellers to provide forward thrust during cruising flight.
A gyroscope (from Ancient Greek γῦρος gûros, "circle" and σκοπέω skopéō, "to look") is a device used for measuring or maintaining orientation and angular velocity.
A helicopter bucket is a specialised bucket suspended on a cable carried by a helicopter to deliver water for aerial firefighting.
Helicopter dynamics is a field within aerospace engineering concerned with theoretical and practical aspects of helicopter flight.
A helicopter pilot manipulates the helicopter flight controls to achieve and maintain controlled aerodynamic flight.
The height–velocity diagram or H/V curve is a graph charting the safe/unsafe flight profiles relevant to a specific helicopter.
Helicopter manufacturers belong to the broader category of aerospace manufacturers.
Helicopter noise reduction is a topic of research into designing helicopters which can be operated more quietly, reducing the public-relations problems with night-flying or expanding an airport.
A helicopter main rotor or rotor system is the combination of several rotary wings (rotor blades) and a control system that generates the aerodynamic lift force that supports the weight of the helicopter, and the thrust that counteracts aerodynamic drag in forward flight.
Helicopter Underwater Egress Training in the United States, and Helicopter Underwater Escape Training in most other countries, (often abbreviated HUET, pronounced hue-wet, hue-way or you-way) is training provided to helicopter flight crews, offshore oil and gas industry staff law enforcement personnel, and military personnel who are regularly transported by helicopters over water.
A Heliport is by definition an area of land, water, or structure used or intended to be used for the landing and takeoff of helicopters, and includes its buildings and facilities (if any).
Helitack refers to "helicopter-delivered fire resources", and is the system of managing and using helicopters and their crews to perform aerial firefighting and other firefighting duties, primarily initial attack on wildfires.
Henrich Focke (8 October 1890 – 25 February 1979) was a German aviation pioneer from Bremen and also a co-founder of the Focke-Wulf company.
Hermann Ganswindt (June 12, 1856, Voigtshof bei Seeburg, East Prussia – October 25, 1934, Berlin, Germany) was a German inventor and spaceflight scientist, whose inventions (such as the dirigible, the helicopter, and the internal combustion engine) are thought to have been ahead of his time.
The Hiller YH-32 Hornet (company designation HJ-1) was an American ultralight helicopter built by Hiller Aircraft in the early 1950s.
The Hughes OH-6 Cayuse (nicknamed "Loach", after the requirement acronym LOH — Light Observation Helicopter) is a single-engine light helicopter with a four-bladed main rotor used for personnel transport, escort and attack missions, and observation.
A human-powered helicopter (HPH) is a helicopter powered solely by one or more humans carried on board.
The Igor I. Sikorsky Human Powered Helicopter Competition was established in 1980 by the American Helicopter Society (AHS) International.
Igor Ivanovich Sikorsky (a, tr. Ígor' Ivánovič Sikórskij; May 25, 1889 – October 26, 1972),Fortier, Rénald.
Intermeshing rotors on a helicopter are a set of two rotors turning in opposite directions, with each rotor mast mounted with a slight angle to the other, in a transversely symmetrical manner, so that the blades intermesh without colliding.
An internal combustion engine (ICE) is a heat engine where the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit.
Iraq (or; العراق; عێراق), officially known as the Republic of Iraq (جُمُهورية العِراق; کۆماری عێراق), is a country in Western Asia, bordered by Turkey to the north, Iran to the east, Kuwait to the southeast, Saudi Arabia to the south, Jordan to the southwest and Syria to the west.
Jacob Christian Hansen Ellehammer (June 14, 1871 – May 20, 1946) was a Danish watchmaker and inventor born in Bakkebølle, Denmark.
James Gordon Bennett Jr. (May 10, 1841May 14, 1918) was publisher of the New York Herald, founded by his father, James Gordon Bennett Sr. (1795–1872), who emigrated from Scotland.
Ján Bahýľ (25 May 1856 – 13 March 1916) was a Slovak inventor and engineer.
Jean Boulet (16 November 1920, Brunoy – 13 February 2011, Aix-en-Provence) was a French aviator.
Jesus nut, or Jesus pin, is a slang term for the main rotor retaining nut which holds the main rotor to the mast of some helicopters, such as the UH-1 Iroquois helicopter; or more generally is any component that represents a single point of failure with catastrophic consequences.
The Jordan Valley (עֵמֶק הַיַרְדֵּן, Emek HaYarden; الغور, Al-Ghor or Al-Ghawr) forms part of the larger Jordan Rift Valley.
Juan de la Cierva y Codorníu, 1st Count of De La Cierva (21 September 1895 in Murcia, Spain – 9 December 1936 in Croydon, United Kingdom) was a Spanish civil engineer, pilot and aeronautical engineer.
Kaman Aerospace is an American aerospace company, with headquarters in Bloomfield, Connecticut.
The Kaman K-225 was an experimental helicopter developed by Kaman Aircraft.
Kappa (uppercase Κ, lowercase κ or cursive ϰ; κάππα, káppa) is the 10th letter of the Greek alphabet, used to represent the sound in Ancient and Modern Greek.
The Korean War (in South Korean, "Korean War"; in North Korean, "Fatherland: Liberation War"; 25 June 1950 – 27 July 1953) was a war between North Korea (with the support of China and the Soviet Union) and South Korea (with the principal support of the United States).
Leonardo di ser Piero da Vinci (15 April 14522 May 1519), more commonly Leonardo da Vinci or simply Leonardo, was an Italian polymath of the Renaissance, whose areas of interest included invention, painting, sculpting, architecture, science, music, mathematics, engineering, literature, anatomy, geology, astronomy, botany, writing, history, and cartography.
A fluid flowing past the surface of a body exerts a force on it.
Lioré-et-Olivier was a French manufacturer of aircraft of the 20th century, founded in 1912 by Fernand Lioré and Henri Olivier.
This is a list of helicopter airlines.
This is a list of rotorcraft, including helicopters, autogyros, rotor kites and convertiplanes.
A lost film is a feature or short film that is no longer known to exist in any studio archives, private collections, or public archives, such as the U.S. Library of Congress.
Louis Charles Breguet (2 January 1880 in Paris – 4 May 1955 in Saint-Germain-en-Laye, France) was a French aircraft designer and builder, one of the early aviation pioneers.
Low-g condition is a phase of aerodynamic flight where the airframe is temporarily unloaded.
NASA's Mars Helicopter Scout (MHS) is a planned robotic helicopter expected to help scout interesting targets for study on Mars, and plan the best driving route for the Mars 2020 rover.
Mass production, also known as flow production or continuous production, is the production of large amounts of standardized products, including and especially on assembly lines.
Max Skladanowsky (April 30, 1863 – November 30, 1939) was a German inventor and early filmmaker.
A mechanic is a tradesman, craftsman, or technician who uses tools to build or repair machinery.
Medical evacuation, often shortened to medevac or medivac, is the timely and efficient movement and en route care provided by medical personnel to wounded being evacuated from a battlefield, to injured patients being evacuated from the scene of an accident to receiving medical facilities, or to patients at a rural hospital requiring urgent care at a better-equipped facility using medically equipped ground vehicles (ambulances) or aircraft (air ambulances).
Meteorology is a branch of the atmospheric sciences which includes atmospheric chemistry and atmospheric physics, with a major focus on weather forecasting.
Mikhail Vasilyevich Lomonosov (ləmɐˈnosəf|a.
The Mil Mi-26 (Миль Ми-26, NATO reporting name: Halo) is a Soviet/Russian heavy transport helicopter.
The Mil Mi-8 (Ми-8, NATO reporting name: Hip) is a medium twin-turbine helicopter, originally designed by the Soviet Union, and now produced by Russia.
The Mil V-12 (NATO reporting name: Homer), given the project number Izdeliye 65 ("Item 65"), is the largest helicopter ever built.
A military helicopter is a helicopter that is either specifically built or converted for use by military forces.
The M134 Minigun is a 7.62×51mm NATO, six-barrel rotary machine gun with a high rate of fire (2,000 to 6,000 rounds per minute) which can also fire at a high sustained rate.
A monocopter or gyropter is a rotorcraft that uses a single rotating blade.
A multirotor or multicopter is a rotorcraft with more than two rotors.
Myanmar, officially the Republic of the Union of Myanmar and also known as Burma, is a sovereign state in Southeast Asia.
The National Aeronautics and Space Administration (NASA) is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research.
A national park is a park in use for conservation purposes.
Nazi Germany is the common English name for the period in German history from 1933 to 1945, when Germany was under the dictatorship of Adolf Hitler through the Nazi Party (NSDAP).
Nepal (नेपाल), officially the Federal Democratic Republic of Nepal (सङ्घीय लोकतान्त्रिक गणतन्त्र नेपाल), is a landlocked country in South Asia located mainly in the Himalayas but also includes parts of the Indo-Gangetic Plain.
The City of New York, often called New York City (NYC) or simply New York, is the most populous city in the United States.
Nicolas Florine, born Nikolay Florin (19 July 1891 – 21 January 1972), was an engineer who settled in Belgium.
Nitrocellulose (also known as cellulose nitrate, flash paper, flash cotton, guncotton, and flash string) is a highly flammable compound formed by nitrating cellulose through exposure to nitric acid or another powerful nitrating agent.
NOTAR (no tail rotor) is a helicopter system which avoids the use of a tail rotor.
An oil platform, offshore platform, or offshore drilling rig is a large structure with facilities for well drilling to explore, extract, store, process petroleum and natural gas which lies in rock formations beneath the seabed.
Asbóth Oszkár, also rendered as Oskar Asboth, (31 March 1891 in Pankota – 27 February 1960 in Budapest) was a Hungarian aviation engineer often credited with the invention of the helicopter.
Pascal Chrétien (born 7 April 1968) is a French-Australian commercial helicopter pilot and engineer with degrees in electronics and aerospace who designed, built and test flew the world’s first manned electric helicopter the Solution F/Chretien Helicopter on 12 August 2011.
A patent is a set of exclusive rights granted by a sovereign state or intergovernmental organization to an inventor or assignee for a limited period of time in exchange for detailed public disclosure of an invention.
Paul Cornu (June 15, 1881 – 6 June 1944) was a French engineer.
Payload is the carrying capacity of an aircraft or launch vehicle, usually measured in terms of weight.
Petróczy, Kármán and Žurovec were Hungarian and Czech engineers who worked on helicopter development immediately before and during World War I. Between them they produced two experimental prototypes, the PKZ-1 and PKZ-2, intended to replace the dangerous hydrogen-filled observation balloons then in use.
The Platt-LePage XR-1, also known by the company designation PL-3,Francillon 1990, p.49.
Police aviation is the use of rotary-wing aircraft, fixed-wing aircraft, nonrigid-wing aircraft or lighter-than-air aircraft in police operations.
In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.
A quadcopter, also called a quadrotor helicopter or quadrotor, is a multirotor helicopter that is lifted and propelled by four rotors.
Raúl Pateras Pescara de Castelluccio (1890 – 1966), marquis of Pateras-Pescara, was an engineer and inventor from Argentina who specialized in automobiles, helicopters and free-piston engines.
The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel.
A Radio-controlled helicopter (also RC helicopter) is model aircraft which is distinct from a RC airplane because of the differences in construction, aerodynamics, and flight training.
Raoul Hafner, (1905–1980) FEng, FRAes, was an Austrian-born British helicopter pioneer and engineer.
A reciprocating engine, also often known as a piston engine, is typically a heat engine (although there are also pneumatic and hydraulic reciprocating engines) that uses one or more reciprocating pistons to convert pressure into a rotating motion.
In military operations, reconnaissance or scouting is the exploration outside an area occupied by friendly forces to gain information about natural features and other activities in the area.
Recreation is an activity of leisure, leisure being discretionary time.
Reflection seismology (or seismic reflection) is a method of exploration geophysics that uses the principles of seismology to estimate the properties of the Earth's subsurface from reflected seismic waves.
Retreating blade stall is a hazardous flight condition in helicopters and other rotary wing aircraft, where the rotor blade with the smaller resultant relative wind exceeds the critical angle.
Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min) is the number of turns in one minute.
The Robinson Helicopter Company, based at Zamperini Field in Torrance, California, is a manufacturer of civil helicopters.
The Robinson R22 is a two-bladed, single-engine light utility helicopter manufactured by Robinson Helicopter Company.
The Robinson R44 is a four-seat light helicopter produced by Robinson Helicopter Company since 1992.
A rocket launcher is any device that launches a rocket-propelled projectile, although the term is often used in reference to mechanisms that are portable and capable of being operated by an individual.
Romanization of Greek is the transliteration (letter-mapping) or transcription (sound-mapping) of text from the Greek alphabet into the Latin alphabet.
The rotary engine was an early type of internal combustion engine, usually designed with an odd number of cylinders per row in a radial configuration, in which the crankshaft remained stationary in operation, with the entire crankcase and its attached cylinders rotating around it as a unit.
A rotorcraft or rotary-wing aircraft is a heavier-than-air flying machine that uses lift generated by wings, called rotary wings or rotor blades, that revolve around a mast.
A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, aircraft, or other conveyance that moves through a fluid medium (generally air or water).
The Russian Academy of Sciences (RAS; Росси́йская акаде́мия нау́к (РАН) Rossíiskaya akadémiya naúk) consists of the national academy of Russia; a network of scientific research institutes from across the Russian Federation; and additional scientific and social units such as libraries, publishing units, and hospitals.
Search and rescue (SAR) is the search for and provision of aid to people who are in distress or imminent danger.
Shetland (Old Norse: Hjaltland), also called the Shetland Islands, is a subarctic archipelago of Scotland that lies northeast of Great Britain.
The CH-53 Sea Stallion is the most common name for the Sikorsky S-65 family of heavy-lift transport helicopters.
The Sikorsky CH-53E Super Stallion is a heavy-lift helicopter operated by the United States military.
The Sikorsky CH-54 Tarhe is a twin-engine heavy-lift helicopter designed by Sikorsky Aircraft for the United States Army.
The Sikorsky H-5, (initially designated R-5 and also known as S-48, S-51 and by company designation VS-327Fitzsimons, Bernard, general editor. Illustrated Encyclopedia of 20th Century Weapons and Warfare (London: Phoebus, 1978), Volume 20, p.2173, "R-5, Sikorsky".) was a helicopter built by Sikorsky Aircraft Corporation.
The Sikorsky R-4 is a two-seat helicopter designed by Igor Sikorsky with a single, three-bladed main rotor and powered by a radial engine.
The Sikorsky R-6 is an American light two-seat helicopter of the 1940s.
The Sikorsky S-64 Skycrane is an American twin-engine heavy-lift helicopter.
The Sikorsky UH-60 Black Hawk is a four-bladed, twin-engine, medium-lift utility helicopter manufactured by Sikorsky Aircraft.
Sint-Genesius-Rode (Rhode-Saint-Genèse) is a municipality located in Flanders, one of three regions of Belgium, in the province of Flemish Brabant.
The Slovaks or Slovak people (Slováci, singular Slovák, feminine Slovenka, plural Slovenky) are a nation and West Slavic ethnic group native to Slovakia who share a common ancestry, culture, history and speak the Slovak language.
Sonar (originally an acronym for SOund Navigation And Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels.
The Soviet Union, officially the Union of Soviet Socialist Republics (USSR) was a socialist state in Eurasia that existed from 1922 to 1991.
The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium.
Sud-Aviation (Southern Aviation) was a French state-owned aircraft manufacturer, originating from the merger of Sud-Est (SNCASE, or Société nationale des constructions aéronautiques du sud-est) and Sud-Ouest (SNCASO or Société nationale des constructions aéronautiques du sud-ouest) on 1 March 1957.
The Sud-Ouest S.O.1221 Djinn is a French two-seat light helicopter designed and manufactured by aircraft manufacturer Sud-Ouest, which later became Sud Aviation.
A surveillance aircraft is an aircraft used for surveillance—collecting information over time.
A swashplate is a device that translates input via the helicopter flight controls into motion of the main rotor blades.
The tail rotor is a smaller rotor mounted so that it rotates vertically or near-vertically at the end of the tail of a traditional single-rotor helicopter.
Tandem rotor helicopters have two large horizontal rotor assemblies mounted one in front of the other.
Taoism, also known as Daoism, is a religious or philosophical tradition of Chinese origin which emphasizes living in harmony with the Tao (also romanized as ''Dao'').
A thermographic camera (also called an infrared camera or thermal imaging camera) is a device that forms an image using infrared radiation, similar to a common camera that forms an image using visible light.
Thomas Alva Edison (February 11, 1847October 18, 1931) was an American inventor and businessman, who has been described as America's greatest inventor.
Thrust is a reaction force described quantitatively by Newton's third law.
A tiltrotor is an aircraft which generates lift and propulsion by way of one or more powered rotors (sometimes called proprotors) mounted on rotating engine pods or nacelles usually at the ends of a fixed wing or an engine mounted in the fuselage with drive shafts transferring power to rotor assemblies mounted on the wingtips.
A tip jet refers to the jet nozzles at the tip of some helicopter rotor blades, to spin the rotor, much like a Catherine wheel firework.
The tonne (Non-SI unit, symbol: t), commonly referred to as the metric ton in the United States, is a non-SI metric unit of mass equal to 1,000 kilograms;.
Tourism is travel for pleasure or business; also the theory and practice of touring, the business of attracting, accommodating, and entertaining tourists, and the business of operating tours.
Improved rotor efficiency resulting from directional flight in a helicopter is called translational lift.
Transport or transportation is the movement of humans, animals and goods from one location to another.
Transverse flow effect is an aerodynamic effect encountered when a helicopter moves (typically forward) through the air.
The Central Aerohydrodynamic Institute (Tsentralniy Aerogidrodinamicheskiy Institut, TsAGI) was founded in Moscow by the pioneer of Russian aviation, Nikolai Yegorovich Zhukovsky on December 1, 1918.
A turboshaft engine is a form of gas turbine that is optimized to produce shaft power rather than jet thrust.
The turkey is a large bird in the genus Meleagris, which is native to the Americas.
In aviation, the turn and slip indicator (T/S, a.k.a. turn and bank indicator) and the turn coordinator (TC) variant are essentially two aircraft flight instruments in one device.
A twistgrip is a handle that can be twisted to operate a control.
The United States Army Air Forces (USAAF or AAF), informally known as the Air Force, was the aerial warfare service of the United States of America during and immediately after World War II (1939/41–1945), successor to the previous United States Army Air Corps and the direct predecessor of the United States Air Force of today, one of the five uniformed military services.
The United States Army Aviation Branch is the administrative organization within the United States Army responsible for doctrine, manning and configuration for all army aviation units.
An unmanned aerial vehicle (UAV), commonly known as a drone, is an aircraft without a human pilot aboard.
A utility helicopter is a multi-purpose helicopter.
In aviation, V-speeds are standard terms used to define airspeeds important or useful to the operation of all aircraft.
Vélizy-Villacoublay is a commune in the Yvelines department in the Île-de-France in north-central France.
The Vietnam War (Chiến tranh Việt Nam), also known as the Second Indochina War, and in Vietnam as the Resistance War Against America (Kháng chiến chống Mỹ) or simply the American War, was a conflict that occurred in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975.
The von Karman Institute for Fluid Dynamics (VKI) is a non-profit educational and scientific organization which specializes in three specific fields: aeronautics and aerospace, environment and applied fluid dynamics, turbomachinery and propulsion.
A vortex ring, also called a toroidal vortex, is a torus-shaped vortex in a fluid or gas; that is, a region where the fluid mostly spins around an imaginary axis line that forms a closed loop.
The vortex ring state, also known as settling with power, is a dangerous condition that may arise in helicopter flight, when a vortex ring system engulfs the rotor causing severe loss of lift.
The Vought-Sikorsky VS-300 (or S-46) is a single-engine helicopter designed by Igor Sikorsky.
A vertical take-off and landing (VTOL) aircraft is one that can hover, take off, and land vertically.
In aeronautics, wave drag is a component of the aerodynamic drag on aircraft wings and fuselage, propeller blade tips and projectiles moving at transonic and supersonic speeds, due to the presence of shock waves.
The Westland Lynx is a British multi-purpose military helicopter designed and built by Westland Helicopters at its factory in Yeovil.
Whiteout is a weather condition in which visibility and contrast are severely reduced by snow or sand.
Wildfire suppression is a range of firefighting tactics used to suppress wildfires.
The wire strike protection system (WSPS) (Developed for the OH-58 / Bell 206 in 1979) is a system of components designed to mitigate the risk of wire strikes while flying helicopters at nap-of-the-earth altitudes, as well as takeoffs and landings.
World War I (often abbreviated as WWI or WW1), also known as the First World War, the Great War, or the War to End All Wars, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918.
World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although conflicts reflecting the ideological clash between what would become the Allied and Axis blocs began earlier.
The Wright brothers, Orville (August 19, 1871 – January 30, 1948) and Wilbur (April 16, 1867 – May 30, 1912), were two American aviators, engineers, inventors, and aviation pioneers who are generally credited with inventing, building, and flying the world's first successful airplane.
Yitav (יִיטַ"ב, an abbreviation of Yad Yitzhak Tabenkin) is an Israeli settlement and moshav shitufi in the southern Jordan Valley of the West Bank.
On May 10, 1977, an Israeli Air Force Sikorsky CH-53 Yas'ur helicopter crashed during an exercise in the Jordan Valley, killing all 54 on board (including the 10-member flight crew).
On 6 November 1986, a Boeing 234LR Chinook helicopter returning workers from the Brent oilfield crashed on approach to land at Sumburgh Airport in the Shetland Islands.
On January 28, 1992, the Azerbaijani transport helicopter Mil Mi-8 was reportedly shot down by a heat-seeking missile near the town of Shusha.
The 1997 Israeli helicopter disaster אסון המסוקים: Ason HaMasokim, lit.
On 19 August 2002, a group of Chechen separatists armed with a man-portable air-defense system brought down a Russian Mil Mi-26 helicopter in a minefield, which resulted in the death of 127 Russian soldiers in the greatest loss of life in the history of helicopter aviation.
The 2009 Pakistan Army Mil Mi-17 crash occurred on July 3, 2009 in the Federally Administered Tribal Areas of Pakistan.
On 6 August 2011, a U.S. Boeing CH-47 Chinook military helicopter, Call Sign "Extortion 17," was shot down while transporting a quick reaction force attempting to reinforce an engaged unit of Army Rangers in Wardak province, west of Kabul, Afghanistan.
The 9K34 Strela-3 (9К34 «Стрела-3»; arrow) is a man-portable air defence missile system (MANPADS) developed in the Soviet Union as a response to the poor performance of the earlier 9K32 Strela 2 (SA-7 Grail) system.
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