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Topic: Rotary wing aircraft

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	TransportStation
		This downward deflection causes an opposite lifting force on the wing (described by Newton's third law) and a lower pressure on the upper surface, higher pressure on the lower surface.
		In the cross system, the rotary wing aircraft resembles a traditional fixed-wing airplane, with the two main rotors mounted at the extremities of its wings.
		Such helicopters are rare, because structural integrity of the wings is difficult to maintain against the amplified resonance of far off-board rotor-turbine units.
	www.transportstation.org /show/4812/Helicopter (2045 words)

	Helicopter - Wikipedia, the free encyclopedia
		A conventional aircraft is able to fly because the forward motion of its angled wings forces air downwards, creating an opposite reaction called lift that forces the wings upwards.
		A small, fixed wing aircraft can be stable enough that a pilot can let go of the controls while looking at a map or dealing with a radio, and the plane will generally stay on course.
		Tension is maintained on the cable as the helicopter descends which assists the pilot with accurate positioning of the aircraft on the deck; once on deck locking beams close on the probe, locking the aircraft to the flight deck.
	en.wikipedia.org /wiki/Helicopter (4353 words)

	[No title] (Site not responding. Last check: 2007-10-20)
		Rotary wing aircraft and aircraft capable of hover present unique challenges for ground proximity alerting due to the different flight profiles flown and the unique capabilities of rotary wing aircraft.
		Rotary wing aircraft can also descend straight down from a hover to land on all sorts of terrain, and need not make a gradual descent and approach to land as in the case of fixed wing aircraft.
		In a fixed wing aircraft, the terrain floor relates to a distance AH below the aircraft and is proportional to the distance to the closest runway to prevent nuisance warnings when the aircraft is taking off and landing, while providing adequate protection in other modes of operation.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=01/92823.011206&ELEMENT_SET=DECL (9198 words)

	Helicopter -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-20)
		A conventional aircraft is able to fly because the forward motion of its angled wings forces air downwards, creating an opposite reaction called (One of the layers forming the heel of a shoe or boot) lift that forces the wings upwards.
		For pitch (tilting forward and back) or roll (tilting sideways) the (The acute angle between the direction of the undisturbed relative wind and the chord of an airfoil) angle of attack of the main rotor blades is altered or cycled during the rotation creating a differential of lift at different points of the rotary wing.
		A helicopter should not be mistaken for an (An aircraft that is supported in flight by unpowered rotating horizontal wings (or blades); forward propulsion is provided by a conventional propeller) autogyro, which is a historical predecessor of the helicopter that gains lift from an unpowered rotor.
	www.absoluteastronomy.com /encyclopedia/h/he/helicopter.htm (2659 words)

	Excessive altitude loss after take-off warning system for rotary wing aircraft - Patent 4818992
		This circuitry monitors the airspeed of the aircraft, the position of the landing gear and the altitude of the aircraft in order to determine whether the aircraft is actually in a take-off phase or in a go-around after a missed approach phase.
		As the aircraft continues to ascend, the integrator 20 integrates the positive barometric rate signal from the barometric rate circuit 14 to thereby reduce the magnitude of the altitude loss signal present at the output of the integrator 20.
		If the aircraft begins to descend again, the integrator 20 adds any altitude loss to the altitude loss signal previously accumulated, and causes the comparator 22 to generate the warning initiation signal when the cumulative loss exceeds the maximum loss permitted for the altitude at which the aircraft is flying.
	www.freepatentsonline.com /4818992.html (3284 words)

	[No title] (Site not responding. Last check: 2007-10-20)
		The effect of strong winds on a rotary wing aircraft can result in saturated lateral cyclic pitch or aft longitudinal cyclic pitch, as a consequence of limiting to ensure that the aircraft stays within the safe envelope of commands, which assure aircraft stability.
		To limit the complexity and weight of an unmanned rotary wing aircraft, it is convenient to use existing control channels to navigate the aircraft from one position to a new position.
		Therein, the true heading of the aircraft on the line 13 is subtracted from the true bearing to the destination on a line 66 in a summer 67, to determine the desired aircraft direction on a line 68, which represents the relative bearing to the destination.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=99/64942.991216&ELEMENT_SET=DECL (5580 words)

	Recreation: Aviation: Aircraft - Open Site
		Flex wing aircraft are most often classified as extreme aircraft and considered to be more risky to navigate.
		Powered fixed wing and flex wing aircraft generally gain forward momentum through the use of an engine and propeller, or a jet engine.
		Rotary wing aircraft such as helicopters and gyrocopters use a spinning rotar to provide forward motion and lift.
	www.open-encyclopedia.info /index.php/Recreation/Aviation/Aircraft (299 words)

	Hub for rotor head of rotary-wing aircraft and rotor head with such hub - US Patent 6200097 (Site not responding. Last check: 2007-10-20)
		Hence, with such a known hub, in the production of the rotor head, it is necessary to integrate each spherical stop of a rigid loop with the associated blade, then to insert the stops, thus integrated with their blades, through said apertures into said cage and, finally, to fix the stops to the hub.
		In order to fix and articulate each blade on the hub, laminated spherical stops 8 of a known type are provided, the centre of rotation 11 of which lies on the axis L--L of the corresponding blade, these spherical stops serving as the sole articulation in flapping, in drag and in pitch.
		Moreover, the flapping-pitch coupling of the invention improves the behaviour of the aircraft from the point of view of stability and of entry into autorotation and the inclination of the pitch rods, by virtue of the pitch-drag coupling, affords favourable aerodynamic damping from the point of view of ground-air resonance.
	www.patentstorm.us /patents/6200097.html (2268 words)

	Naval Test Wing Atlantic - Rotary Wing Aircraft Test Squadron (Site not responding. Last check: 2007-10-20)
		The Naval Rotary Wing HX-21 Aircraft Test Squadron tests and evaluates all rotary wing aircraft including the H-1, H-3, H-53, H-60, TH-57 and V-22.
		Aircraft performance testing is used to validate specification requirements and contractor compliance, as well as to obtain and develop information pertinent to mission planning and execution.
		DI is used in the development of procedures and envelopes for operating rotary wing aircraft aboard ship and includes: development and/or expansion of launch/recovery and engagement/disengagement wind envelopes, electromagnetic compatibility testing, deck certification and deck strength analyses, and aircraft handling and stowage testing.
	www.nawcad.navy.mil /testwinglant/rotarywing.cfm (228 words)

	Aircraft Maintenance Engineer - Rotary Wing (Site not responding. Last check: 2007-10-20)
		The Aircraft Services Directorate is responsible for the provision of aircraft and services in support of Transport Canada operations, as well, as selected programs of other federal government departments and agencies.
		Aircraft Services operates and maintains a fleet of 45 fixed and 35 rotary wing aircraft to support Transport Canada operations, the operations of other federal government and agencies, and external clients.
		The aircraft are located at seven fixed wing and eleven rotary wing aircraft bases across Canada, with major work conducted at the main base located in Ottawa, Ontario.
	www.tc.gc.ca /era_are/can_post/en/AircraftMaintenanceEngineer-RotaryWing.htm (736 words)

	Introduction to Helicopter Flight
		With early fixed-wing aircraft, the propulsion system (the engine and propeller) and the lift device (the wing) were relatively simple and the challenge was developing control systems to keep the aircraft in level flight and to change direction.
		The solution to this—pitching the rotor blades so that they pushed the aircraft in a certain direction—was difficult to perfect, after all, the control devices themselves were constantly moving at high speed, not affixed to an unmoving wing.
		Their Fa 61 aircraft used a conventional biplane fuselage, but instead of wings it had two large rotors mounted on outriggers on either side of the aircraft.
	www.centennialofflight.gov /essay/Rotary/HE-OV.htm (1732 words)

	[1.0] European Helicopter Pioneers
		At the time, fixed-wing aircraft were still very primitive, and some workers in the new field of aviation believed that rotary-wing aircraft were the better bet over the long run.
		In 1908, fixed-wing aircraft set a number of records for performance and endurance, and were continuing to improve at a rapid pace.
		Even more imaginative concepts included a "tilt-rotor" aircraft designated the "Fa-269", which resembled a conventional aircraft with twin props that could tilt downward to provide short takeoff and landing capabilities, and the "Fa-283", which was a turbojet-powered autogyro transport.
	www.vectorsite.net /avheli_1.html (4100 words)

	The Invention Of The Helicopter
		In fact, while fixed-wing aircraft were quickly refined and improved, it wasn't until the mid-1930s that the helicopter began to emerge as a practical flying machine.
		Although there were massive cutbacks in aircraft orders at the end of the war, in compensation the pressure for immediately delivery of machines was off, and Sikorsky set out on a comprehensive redesign of the R-5 to finally get rid of the bugs.
		After decades of development work, tilt-rotor aircraft are now starting to enter operation, where they provide performance similar to that of a turboprop fixed-wing aircraft and the vertical-takeoff capabilities of the helicopter.
	www.faqs.org /docs/air/avheli.html (7629 words)

	Industry Studies - Aircraft (Site not responding. Last check: 2007-10-20)
		After a decade of mergers and downsizing, the industry’s four main sectors—commercial fixed-wing aircraft, military fixed-wing aircraft, rotary-wing aircraft, and jet engines—are entering a head-to-head competition with Europe from a strategically weakened position.
		Nevertheless, U.S. dominance of the global aircraft market has eroded to the point that vigorous action is required by industry and government to preserve this vital element of national power.
		After a decade of mergers and downsizing, the industry’s four main sectors—commercial fixed-wing aircraft, military fixed-wing aircraft, rotary-wing aircraft, and jet engines—are entering a head-to-head competition with Europe from a strategically weak position.
	www.ndu.edu /icaf/industry/2000/aircraft/aircraft.htm (341 words)

	Rotor structure, especially for rotary wing aircraft - Patent 4690616
		The invention relates to a rotor structure, especially for rotary wing aircraft, having one or more rotor blades each comprising a blade root, a blade neck and a blade wing section.
		In order to allow the rotor blade 2, or rather its wing section 2.3, to undergo blade pitch or blade angle adjustment movements about the blade pitch axis 2.4, a torsionally yielding blade neck 2.2 is provided between the blade root 2.1 and the blade wing section 2.3.
		The blade control sleeve 4 is torsionally rigidly connected to the blade wing section 2.3, for example, by an adhesive bonding resulting from the curing of the fiber composite material.
	www.freepatentsonline.com /4690616.html (1862 words)

	001255 Mosquito Control Fixed & Rotary Wing Pilot/Mechanic
		A minimum of 2000 hours flight experience in multi-engine aircraft to include 1000 hours in multi-engine, 500 in turbine powered aircraft with 50 in Beechcraft King aircraft flying time is required.
		An employee in this class is responsible for piloting rotary-wing aircraft, single-engine or multi-engine aircraft and for ensuring that all equipment is in airworthy condition.
		Instructions are received from a superior as to the areas to be sprayed or inspected and the employee is responsible for the proper application of insecticide.
	www.co.miami-dade.fl.us /emprel/pay_plan/job_001255.htm (502 words)

	ipedia.com: Helicopter Article (Site not responding. Last check: 2007-10-20)
		A helicopter is an aircraft which is lifted and propelled by one or two large horizontal rotors (propellers).
		The idea of the helicopter was first conceived by Leonardo da Vinci in the 15th century, but it was not until after the invention of the powered aeroplane in the 20th century that actual models were produced.
		Hybrid types that combine features of helicopters and fixed wing designs include the experimental Fairey Rotordyne of the 1950s and the Bell Boeing Osprey, which is on order by the US Marine Corps and is the first mass produced tilt-rotor to enter service.
	www.ipedia.com /helicopter.html (1963 words)

	Farnborough Aircraft Interiors rotary wing helicopter & fixed wing aircraft cabin refurbishment
		Farnborough Aircraft Interiors are leading specialists in corporate and private, fixed wing and rotary wing aircraft interior refurbishment.
		Supplying aircraft cabin refurbishment solutions to meet your specific needs, whether private or business, from simple repairs through to complete project management.
		At Farnborough Aircraft Interiors, we have built our reputation by consistently providing our customers with a professional and problem-free service, from start to finish.
	www.aircraftinteriors.co.uk /home.asp (273 words)

	Marine Corps Rotary Wing
		Marine Corps rotary-wing aircraft support the MAGTF in the areas of assault support, offensive air support, and control of aircraft and missiles.
		Commonality between aircraft greatly enhances the maintainability and deployability of the systems with both aircraft supported and operated within the same squadron structure.
		The aircraft is capable of lifting 16 tons at sea level, transporting the load 50 nautical miles, and returning.
	www.fas.org /man/dod-101/navy/docs/vision/Corpsr.htm (772 words)

	Directory - Business: Aerospace and Defense: Aeronautical: Aircraft and Components: Rotary Wing
		Rotary wing aircraft are those aircraft for which lift is pricipally generated by one or more aerodynamic wings rotating about one or more fixed points on the aircraft.
		Kulikov Aircraft Company · cached · Business and general aviation aircraft capable of vertical take-off and landing.
		CarterCopter · iweb · cached · Developing a new high technology gyroplane expected to cruise at 400mph at 50,000 feet using the rotor for vertical takeoff and landing and a wing for high speed cruise.
	www.incywincy.com /default?p=288260 (524 words)

	Rotary Aircraft - Military Aircraft
		During the course of the war, however, organic aviation's small fixed-wing aircraft, commonly known as Grasshoppers, came to be used for command and control (C2), medical evacuation (MEDEVAC), wire laying, courier service, aerial photography, reconnaissance, and other purposes.
		The principal reason for the expanding mission of organic Army aviation was that its aircraft were accessible to ground commanders and able to operate in close coordination with ground forces.
		Although Army aviation has continued to use some fixed-wing aircraft up to the present, its evolution to its current role and status resulted to a large degree from the development of the helicopter and of rotary-wing tactics and doctrine.
	www.fas.org /man/dod-101/sys/ac/rotary.htm (1812 words)

	EPA: Federal Register: From the Federal Register Online via GPO Access [wais.access.gpo.gov]
		For example, the report relies heavily on generalized ratios developed from personnel or aircraft loading and not on specific requirements and thus incorrectly assumes that a high percentage of new construction at MCAS Miramar can be attributed to the inclusion of rotary-wing aircraft.
		Most rotary-wing aircraft arrivals and departures and all pattern work will be done on the north pads while fixed-wing FCLP's are in progress on the 24L runway located to the south side of the air station.
		Rotary wing aircraft operate at approximately the same speeds as small general aviation aircraft and this contributes to these two types of aircraft operating safely in a VFR environment.
	www.epa.gov /fedrgstr/EPA-IMPACT/1996/December/Day-06/pr-17206.html (10487 words)

	Nat' Academies Press, The Future of Aerospace (1993)
		Contracts were awarded to Sikorsky Aircraft and Bell Helicopter to design, fabricate, and flight test a helicopter with a complete composite airframe.
		We have seen that the advent of the turbine engines, application of composite materials, and advances in rotary-wing aerodynamics have had a profound impact on the utility and acceptance of the helicopter.
		The future of the helicopter is clearly assured, and advanced rotary-wing aircraft, with an additional degree of rotation, are ready to extend the performance and utility of the helicopter.
	www.nap.edu /books/0309048818/html/45.html (3654 words)

	Active Skim View of: The Future of Rotary-Wing Aircraft
		Cierva was attracted to the unpowered, autorotating, wing because of its lifting potential at very low forward speeds.
		This national interest stimulated Igor Sikorsky and the United Aircraft Corporation to develop and fly in December 1941 the VS-300, the first helicopter with a single lifting main rotor and a single tail rotor.
		For one thing, 40 percent of the empty weight of a helicopter rotates and the lifting rotor in forward flight experiences in one revolution, as broad an aerodynamic, structural dynamic, and aeroelastic environment as a fixed wing sees in its entire lifetime.
	www.nap.edu /nap-cgi/skimit.cgi?isbn=0309048818&chap=45-64 (822 words)

	[No title] (Site not responding. Last check: 2007-10-20)
		They employ aircraft to gain 3-D positional advantage in either Airborne (paradrop), Airland or Air Assault operations, but like their heavy force counterparts, their ultimate goal is closure with the enemy in a close-in direct-fire fight.
		Since these aircraft were relatively simple and not capable of instrumented flight, the U.S. Army designated warrant officers as the primary technician to perform flight duties.
		The study used the development histories of different vehicles and aircraft to gain a better appreciation of what could be expected in performance of equipment that could be available in the year 2010.
	www.combatreform.com /jarnotcgscthesis.htm (20546 words)

	Aircraft and Rotary Wing aircraft for sale by auction
		Aircraft and Rotary Wing aircraft for sale by auction
		This is a list of all lots in the "1520 - Aircraft, Rotary Wing" FSC category.
		Click on the lot title to get a detailed view of that lot.
	www.govliquidation.com /list/c7009/lna/1.html (729 words)

	Rotary-wing aircraft - Wikipedia, the free encyclopedia
		A rotary-wing aircraft is a broad category of any aircraft with a moving wing, including helicopters and autogyros.
		A third type, tilt-wing (or tilt-rotor) aircraft, are a recent development.
		This page was last modified 16:29, 11 July 2005.
	en.wikipedia.org /wiki/Rotary-wing_aircraft (63 words)

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