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Topic: Turboprop

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	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal
		Most of a turboprop engine's power is used to drive a propeller, and the propellers used are very similar to the propellers used in piston or reciprocating engine-driven aircraft (with the exception that turboprops usually use a constant velocity propeller).
		Turboprop engines are generally used on small or slow subsonic aircraft, but some aircraft outfitted with turboprops have cruising speeds in excess of 500 kts (926 km/h, 575 mph).
		In a turboprop much of the jet thrust is sacrificed in favor of shaftpower, which is obtained by extracting additional power (to that necessary to drive the compressor) from the turbine expansion process.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=turboprop (0 words)

	The Turboprop/Turboshaft Engine
		A turboprop engine uses thrust to turn a propeller.
		A turboshaft is similar to a turboprop engine, differing primarily in the function of the turbine shaft.
		Instead of driving a propeller, the turbine shaft is connected to a transmission system that drives helicopter rotor blades; electrical generators, compressors and pumps; and marine propulsion drives for naval vessels, cargo ships, high speed passenger ships, hydrofoils and other vessels.
	www.aviation-history.com /engines/turboprop.htm (111 words)

	TURBOPROP ENGINES
		In a turboprop engine a propeller mounted in front of the jet engine is driven either by a second, or free, turbine or by additional stages from the turbine that supplies power to the compressor.
		About 90 percent of the energy of the expanding gases is absorbed in the turbine portionthat dives the propeller, leaving only about 10 percent to accelerate the the overall propulsive thrust.
		Turboprops have certain advantages for small and medium-sized planes at speeds of up to about 480 to 640 km/h.
	library.thinkquest.org /J003381F/turboprop_engines.htm (0 words)

	The Advanced Turboprop Project
		The organization that supported the development of the turboprop was far more complex than the research laboratory of an industrial firm, yet it responded to the energy crisis to advance a radical idea.
		The turboprop project tapped the creative talents of engineers at NASA in ways that were reminiscent of the NACA tradition of in-house research, though in management scope it transcended the narrow institutional boundaries of NASA's research centers.
		Since one of the criticisms against the turboprop planes of the 1950s (the Electra, for example), was that their gearboxes required heavy maintenance, GE took a different approach to prop-fan design.
	history.nasa.gov /SP-4219/Chapter14.html (0 words)

	Turboprop Engine
		The turboprop uses a gas turbine core to turn a propeller.
		The core is very similar to a basic turbojet except that instead of expanding all the hot exhaust through the nozzle to produce thrust, most of the energy of the exhaust is used to turn the turbine.
		The thrust equation for a turboprop is given on a separate slide.
	www.grc.nasa.gov /WWW/K-12/airplane/aturbp.html (349 words)

	Turboprop - Wikipedia, the free encyclopedia
		In a turboprop much of the jet thrust is sacrificed in favor of shaftpower, which is obtained by extracting additional power (to that necessary to drive the compressor) from the turbine expansion process.
		Turboprops are very efficient at modest flight speeds (below 724 km/h or 450mph), because the jet velocity of the propeller (and exhaust) is relatively low.
		The first British turboprop engine was the Rolls-Royce RB.50 Trent, a converted Derwent II fitted with reduction gear and a Rotol 7' 11" five-bladed propeller.
	en.wikipedia.org /wiki/Turboprop (690 words)

	Turboprop \| English \| Dictionary & Translation by Babylon
		A Turboprop engine is a type of gas turbine engine which uses most of its power to drive a propeller.
		The propeller of a turboprop is very similar to that used by piston or reciprocating engines, but turboprops usually use a constant velocity propeller.
		Turboprop engines are generally used on small or slow subsonic aircraft, but some aircraft outfitted with turboprops have cruising speeds in excess of 500 kts (925 Km/h).
	www.babylon.com /definition/Turboprop (153 words)

	Aerospaceweb.org \| Ask Us - Turboshaft and Turboprop
		We have seen that both the turboprop and the turboshaft are types of jet engines because they use the gas turbine cycle.
		However, the turboprop gets its name from the fact that the shaft is connected to an aircraft propeller causing it to turn.
		However, it is correct to say that the turboprop is a subcategory or variant of the more generic class of engines known as turboshafts.
	www.aerospaceweb.org /question/propulsion/q0209.shtml (543 words)

	Eclipse Aviation - The VLJs will no doubt be popular, but don't count turboprop singles out yet
		Industry observers believe that turboprops will survive the VLJ invasion, though deliveries of both single- and multi-engine turboprops are expected to remain flat during the next decade and then slow to a trickle.
		This speaks to passengers' turboprop aversion, which has been largely responsible for the regional jet boom in the U.S. While turboprop aversion can't be measured, Continental Airlines maintains that when it replaces a twin turboprop with a regional jet on a route, it sees an almost instant 40-percent increase in passenger loads on that route.
		As mentioned, turboprops will act as a bridge aircraft for owner-pilots who are flying high-performance piston aircraft and wish to purchase a VLJ in the future.
	www.eclipseaviation.com /index.php?option=com_newsroom&task=viewarticle&id=841&Itemid=51 (0 words)

	Halfbakery: Turboprop Engine
		A turboprop engine is simply a gas turbine which is connected to the propellor shaft of an aircraft.
		Heavily modify a minivan (most other cars would be too unstable and/or small to take a turbine like this) by lowering the center of gravity, increasing tyre width, and setting the driver's seat roughly in the middle of the car.
		Replace the entire front end with the turboprop; the transmission runs straight through the center from the back; the car is rear-wheel drive.
	www.halfbakery.com /idea/Turboprop_20Engine (0 words)

	Air Force Technology - PC-21 Turboprop Trainer
		The aircraft combines the procurement and operating costs of current-generation turboprop aircraft with a jet training capability.
		It has a higher wing loading that is more characteristic of a jet and the engine's power output is scheduled by using a sophisticated power management system.
		The aircraft is powered by a Pratt & Whitney PT6A-68B turboprop engine rated at 193kW with a Hartzell E8991 KX five-bladed graphite propeller.
	www.airforce-technology.com /projects/pc_21 (0 words)

	Role of the Turboprop in the Air Transportation System for the 1980S and Onward
		New development in turboprop technology, in association with increased abandonment of short-haul routes by certificated air carriers with jet equipment, is resulting in fuel-efficient turboprops that could spawn a new family of short-haul commercial transport aircraft.
		To assess the likelihood and potential benefits of such a development, the current and projected technology of turboprop aircraft will be discussed and compared with possible turbofan systems.
		Technological improvements as measured by fuel burned and aircraft operating costs are compared for aircraft sizes up to 100 passengers at ranges up to 850 miles.
	www.sae.org /technical/papers/801197 (0 words)

	Business turboprop aircraft for sale on AvBuyer - King Air, Cessna and Piper (Site not responding. Last check: )
		Select from the most comprehensive listing of business turboprop airplanes for sale from around the world.
		Browse relevant aircraft quickly and easily, organize and save your findings, contact the seller, or click to view the most reliable and up-to-date specifications available – those direct from the seller.
		All turboprop aircraft for sale added in the last 7 days
	www.avbuyer.com /AircraftSales/BusinessTurbopropSearch.asp (182 words)

	Aviation Today :: Turboprop Successes Have Yet to Ignite Values
		The 2005 turboprop orders need to be placed into the context of the 2,140 orders secured by Airbus and Boeing [BA] - a mere seven percent of the total - the same market share they had in 2004 when 638 orders were placed for the Airbus and Boeing products compared to 45 turboprops.
		Instead of the turboprop manufacturers having to virtually build to order and seek to survive on a meager 10-20 deliveries per year, there is now an opportunity to increase production and once again experience the benefits of economies of scale in higher production rates.
		The turboprop manufacturers are hopeful that the orders in 2005 were the start of a new cycle for this segment of the industry.
	www.aviationtoday.com /regions/canada/3374.html (648 words)

	Fodor's Travel Guides \| Forums Messages \| For a cheap fare, would you fly in a turboprop?
		I am not wild about turboprops in the US for various reasons, but this is unbelievably beautiful, and the airline is, as Shan333 says, almost anal in the care they take.
		Turboprop engines are even safer than jet engines.
		Even when turboprops CAN fly over the weather, they are usually used here on short routes where they DON'T fly over the weather.
	www.fodors.com /forums/pgMessages.jsp?fid=2&tid=34963270&numresponses=22&start=0 (1629 words)

	Advanced lesson on turboprops and propellers
		What exactly is a 'turboprop?' These basic lessons will complement the Flight Operations Manual in discussing the critical parts of a turboprop and how they work together.
		A turboprop is any airplane that uses a turbine (Jet) engine to provide power to a propeller.
		The turboprop enjoys the reliability and performance of a jet engine and the economics of a propeller.
	www.flywestwind.com /WTC/Pprograms/turboprops.htm (1887 words)

	GE - Aviation: CT7 Turboprop Plays Major Role in Engine Family Success
		It was in 1980 that Saab Aircraft selected the CT7 turboprop version of the GE T700 turboshaft engine to power their new Saab 340 regional airliner.
		We're proud to be joined with Saab on the Saab 340, the first of the new generation turboprops to enter service in 1984.
		Continued success of the CT7 turboprop is being supported by the development of growth versions of the CT7/T700 engine family.
	www.geae.com /aboutgeae/presscenter/smlcom/smlcom_19961104.html (347 words)

	the past (and future) of turboprops ✈ aeronaut
		Turboprops have been experiencing something of a resurgence in sales lately – Airways had an article on Bombardier’s recent Dash 8 sales boom – with turboprop orders matching regional jets for the first time – and ATR has a much larger order backlog than usual.
		Rising fuel costs are making high-frequency turboprop service a profitable alternative to regional jets in the short-haul sector.
		It seems like their choice of a turboprop with high blade counts would be a little more reliable.
	aeronaut.ca /journal/the-past-and-future-of-turboprops (918 words)

	Aeronautics - Aircraft Propulsion (TURBOPROP ENGINES)
		The turboprop engine is an effort to combine the best features of turbojet and propeller aircraft.
		The turboprop uses a gas turbine to turn a propeller.
		That is, no propeller is capable of withstanding the forces generated when it is turned at the same rate as that of the gas turbine.
	www.allstar.fiu.edu /aerojava/flight66.htm (400 words)

	AE 2100 turboprops for military aircraft - Rolls-Royce (Site not responding. Last check: )
		The AE 2100 turboprop is a two shaft gas turbine with a 14-stage high pressure (HP) compressor driven by a two-stage HP turbine.
		The AE 2100 is a turboprop derivative of the AE 1107C-Liberty turboshaft engine.
		Due to the identical physical fits and common thrust centrelines and mounts, in-service aircraft currently powered by the Rolls-Royce T56 turboprop engine can be upgraded to the AE 2100, giving operators increased thrusts and reduced life cycle costs.
	defence.rolls-royce.com /AE-2100-turboprops-for-military-aircraft (237 words)

	Aviation Today :: Recovery in Turboprop Values Remains Patchy
		The fortunes of the turboprop sector have turned around but values improvement remains sporadic, with older examples available in sufficient quantity as to maintain a clear surplus.
		The focus of any improvement in the values of turboprops lies very much with the newer examples, leaving the majority of the 600 plus that remain in storage to corrode.
		Values of older turboprops therefore need to be realistic, with the expectation of further deterioration in the short term.
	www.aviationtoday.com /regions/sa/3784.html (528 words)

	Turboprop Aircraft Image Gallery - Aerospace Technology
		The 328 turboprop is certified according to JAR-25, FAR PART 25.
		The Jetstream 41 turboprop regional airliner, a stretched development of the Jetstream 31/32 family, entered service in 1982.
		The Piaggio P180 Avanti II twin-engine turboprop business aircraft is the successor to the P180 Avanti.
	www.aerospace-technology.com /projects/turbopropaircraft_gallery.html (1658 words)

	MU-2 Twin Turboprop Suffers Spate of Recent Accidents Air Safety Week - Find Articles
		Robert Breiling, a Florida-based expert who prepares a yearly accident analysis for corporate aviation, said in a telephone interview with ASW that the MU-2's accident rate exceeds that of the turboprop aircraft fleet overall, but that the Swearingen Merlin accident rate is higher, as measured per 100,000 hours over the last five years, 1999-2003.
		In any event, the accident rate for the MU-2 and other turboprop aircraft is substantially higher than the accident rate per 100,000 hours for transportcategory aircraft in scheduled passenger service.
		The MU-2 is not exceptional, in terms of the raw number of accidents in the NTSB database involving other medium-size twin turboprops.
	findarticles.com /p/articles/mi_m0UBT/is_21_18/ai_n6265059 (808 words)

	AVITAS - The Leading Advisor to the Aviation Industry
		The AVITAS BlueBook of Turboprop Values provides base, current market and furture base values for approximately 35 different types.
		An indispensable reference source for those who wish to follow the turboprop aircraft market.
		The Turboprop Values book is a bi-annual publication.
	www.avitas.com /publications/pubs-bluebook_com_turboprop.jsp (97 words)

	EADS N.V. - Purchase of ATR 42-500 Turboprop Aircraft
		Demo flights were also conducted during the evaluation, the aircraft were gauged on various performance attributes for instance, passenger appeal and comfort, aircraft maintainability, operational durability and economics.
		Once again, this commercial success is evidence of the strong resurgence of the turboprop aircraft in the regional aviation market.
		The purchase transaction of seven turboprop aircraft from ATR shall further strengthen Pakistan’s economic ties with France and Italy in particular and with Europe in general for years to come.
	www.eads.com /web/printout/en/1024/content/400004/7/14/41180147.html/41179991_40986087/content/OF00000040950509/1/35/41028351.html (487 words)

	Reference.com/Encyclopedia/Turboprop
		A Turboprop (Turbo-propeller) or turboshaft engine is a type of gas turbine.
		This is called a turboprop, and can be found on many smaller commuter planes, cargo planes, and helicopters (where it is often known as a turboshaft).
		The first turboprop engine was the Rolls-Royce RB.50 Trent, a converted Derwent II fitted with reduction gear and a Rotol 7' 11" five-bladed propeller.
	www.reference.com /browse/wiki/Turboprop (253 words)

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