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Topic: Deep stall

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	Concept to Reality
		The accident investigation board conducted an exhaustive investigation of the aerodynamic, stability, and control characteristics of the BAC 111 and concluded that the cause of the accident was an unrecoverable deep-stall phenomenon, which was precipitated by the geometric and aerodynamic characteristics of the configuration.
		For example, deep stall was found to be responsible for crashes experienced with the Hawker Siddeley Trident transport.
		The fourth stall test was made at an altitude of 11,600 ft in the landing configuration and with the stall warning and recovery systems inoperative.
	oea.larc.nasa.gov /PAIS/Concept2Reality/deep_stall.html (1456 words)

	Stall Skins - The alternative to rubber mats! Stall Skins are the ultimate stall and paddock liner that costs 50% less ...
		Rubber stall mats are expensive, bulky and heavy to handle, and tend to shift.
		Stall Skins are a water permeable GeoTextile, made out of polypropelene, so your bedding stays dryer and lasts longer.
		Stall Skins are the ultimate stall and paddock liner that costs 50% less than rubber stall mats.
	www.stallskins.com /stallskins.html (529 words)

	stall - Encyclopedia.com
		In a church or cathedral the stalls are the fixed seats built in rows along the sides of the chancel and used by the clergy and choir.
		In the medieval stalls the miserere was carved with scenes from everyday life or with fabulous animal forms, called misericords.
		The magnificent stalls (c.1530) in St. George's Chapel, Windsor, assigned to the use of the Knights of the Garter, are of this kind.
	www.encyclopedia.com /doc.aspx?id=1E1:stall (1372 words)

	Highbeam Encyclopedia - Search Results for stall
		Turning stalls: the relationship between angle of bank and stall speed isn't a mystery, but it is a bit complicated.
		Stall gets GOP show of support: Democratic candidate John Miller says the Republican unity is a "desperate marriage of convenience" between GOP leaders and Tricia Stall.
		State GOP leaders help Stall, who beat their pick: In addition, Democrat John Miller urges Tricia Stall to sign on to debates before November's election.
	www.encyclopedia.com /SearchResults.aspx?Q=stall&StartAt=1 (1384 words)

	Page 3 (Site not responding. Last check: )
		The stall is because of the angle of attack not the airspeed or attitude.
		The deadliest stall is the cross-control stall that occurs in the landing pattern during a turn from base to final.
		Stall strips are put on the leading edge of an aircraft wing is designed and placed to prevent an abrupt wing-tip stall, but instead to allow any stall to move gradually out from the fuselage to the wing tip.
	www.whittsflying.com /Page3.265Stall_Origin_and_Performance.htm (11870 words)

	What happens when you deep stall a canard? - Canard Aviation Forum (Site not responding. Last check: )
		When I hear 'deep stall' for a canard aircraft, I assumed it was both canard and wing stalled, and then I mistakenly threw in 'cg at or beyond aft limits'.
		The commonly accepted definition in the canard world of a "deep stall" is a stall in which both the canard and main wing are stalled, and the situation becomes stable and unrecoverable.
		I always understood that the dangerous condition incorrectly called deep stall was when the CG aft and the canard light enough loaded that a condition could be reached where the canard would keep flying, at a high AOA, and the main wing would stall.
	canardaviationforum.dmt.net /showthread.php?t=235 (2647 words)

	All-axis control of aircraft in deep stall - Patent 4099687
		The wing 14, not yet stalled, produces lift 40 upward and generally perpendicular to the wing chord; and the thrust 42 of the engine 16 is forward and parallels the axis 24 of the fuselage 12.
		Spoilers 78 on the stabilizer 68 are actuated to cause the stabilizer to stall.
		This induces deep stall of the wing 64; and lacking lift from both wing and stabilizer, the airplane 60 translates downward through a near vertical trajectory.
	www.freepatentsonline.com /4099687.html (3311 words)

	Aircraft stall, Lazair aircraft stalls, Lazair pilot killed in stall aircraft accident.
		Stalls are often related to a sudden engine failure, poor take-off or landing techniques, and the failure to recognize the onset of a stall.
		Slightly more demanding is a stall where one wing stalls slightly before the other, causing that wing to drop sharply, with the possibility of entering a spin.
		A dangerous stall is one where the nose rises, pushing the wing deeper into the stalled state and potentially leading to an unrecoverable deep stall.
	www.ultralightnews.ca /advisories1/lazairstall-accident.htm (1207 words)

	Settlement Agreement Between The United States of America and Lucas County, Ohio
		The toilet stall that was measured is 40-1/2 inches wide and 50-1/2 inches deep with a floor mounted toilet.
		The toilet stall that was measured is 35-1/2 inches wide and 56-1/4 inches deep with a wall mounted toilet.
		The toilet stall that was measured is 35-1/2 inches wide and 55-1/2 inches deep with a wall mounted toilet.
	www.ada.gov /lucasco.htm (9137 words)

	About Canard Aircrafts (Site not responding. Last check: )
		As is the case with aircrafts in conventional configurations, stalling with CG too far aft can lead to a disaster.
		On a canard aircraft, main wing stall is also referred to as "deep stall".
		Since stall is a function of angle of attack, it is very important to keep the relative incidence between the main wing and the canard during construction.
	www.velocitybuilder.com /about_canard_aircrafts.htm (587 words)

	A Tale of Two T-Tails Air Safety Week - Find Articles (Site not responding. Last check: )
		A Deep Stall occurs when the turbulent wake of a stalled mainplane "blanks" the horizontal stabilizer, rendering the elevators ineffective and preventing the aircraft from recovering.
		For T-tails, the deep stall is the equivalent of the helicopter's vortex ring condition, as they can both generate very high rates of descent in a near normal wings-level flight attitude.
		Despite the stick-shaker operating its warning, this led to a series of stalls and eventually a deep stall from which recovery was impossible.
	www.findarticles.com /p/articles/mi_m0UBT/is_36_20/ai_n16729906 (858 words)

	A Tale of Two T-Tails Air Safety Week - Find Articles
		A Deep Stall occurs when the turbulent wake of a stalled mainplane "blanks" the horizontal stabilizer, rendering the elevators ineffective and preventing the aircraft from recovering.
		For T-tails, the deep stall is the equivalent of the helicopter's vortex ring condition, as they can both generate very high rates of descent in a near normal wings-level flight attitude.
		Despite the stick-shaker operating its warning, this led to a series of stalls and eventually a deep stall from which recovery was impossible.
	findarticles.com /p/articles/mi_m0UBT/is_36_20/ai_n16729906 (850 words)

	Lancair3
		The good news is that the aircraft give plenty of warning throughout the approach to stall and stall itself.
		Stalls: As long as the stall recovery is initiated at the first signs of buffet, they are conventional.
		The further aft the CG is the worse this behavior is. Deep stalls and intentional spins should be avoided.
	www.geocities.com /daveandjj/Lancair3.html (959 words)

	Code One Magazine Online: July 1986 - Recovering From Deep Stalls And Departures
		If during your upright deep stall recovery you continue to hold forward pressure as the nose starts down, it is possible to pitch right over on your back and end up in an inverted deep stall.
		If the deep stall is very oscillatory and you pull out of phase (that is, the first pull starts as the nose is just starting down instead of being at its lowest point) or you do not hold the stick long enough in either direction, it is possible that it won’t recover the first time.
		The problem was that these deep stalls were very oscillatory about all three axes, which caused the yaw rate limiter to work hard to prevent a spin.
	www.codeonemagazine.com /archives/1986/articles/july_86/deep_stalls/index.html (3531 words)

	Airdisaster.Com Forums - "Deep stall" question
		I've read a lot about the "deep stall" phenomenon in t-tailed airplanes where the plane gets so badly stalled that disturbed airflow from the wings hits the horizontal tail and renders it unable to control pitch.
		The wing stalls at a defined angle of attack...not a particular airspeed or a particular nose attitude.
		There was also a Northwest 727 lost to a deep stall near JFK as late as 1974, due to iced up pitot heads causing the crew to misread airspeed.
	www.airdisaster.com /forums/showthread.php?t=72823 (1036 words)

	Settlement Agreement Between The United States of America and Lucas County, Ohio
		The toilet stall that was measured is 40-1/2 inches wide and 50-1/2 inches deep with a floor mounted toilet.
		The route to the toilet stall, lavatory, and urinal passes through an opening in the partition that is 31-1/4 inches wide instead of at least 32 inches wide.
		The toilet stall that was measured is 35-1/2 inches wide and 56-1/4 inches deep with a wall mounted toilet.
	www.usdoj.gov /crt/ada/lucasco.htm (9137 words)

	stall skins
		Stall Skins are the ultimate stall and paddock liner that costs 50% less than rubber mats.
		Stall Skins are a water permeable, made out of polypropelene, so your bedding stays dryer and lasts longer.
		Deep bedding protects the durable Stall Skin while the Stall Skin buffers your expensive bedding from dirt and urine.
	www.whiteoakbarnsupply.com /4436.html?sessionidkey=sessionidval (263 words)

	Generic Intro to Deep Stall/Spin
		Aircraft emergency deceleration parachute systems and deep stall/spin recovery parachutes are very similar in design and execution; however, they serve distinctly different purposes as indicated by their names.
		For example, a deep stall system will generally have a smaller diameter chute but a much longer riser than the spin recovery system; whereas, an emergency deceleration parachute system will have a fairly small, but very strong, canopy to withstand the high dynamic pressure at deployment.
		Develop sufficient force to decelerate the aircraft at the required rate, or to break the stall and counter the yawing moment of the aircraft despite operating within the wake of the aircraft in most cases.
	www.butlerparachutes.com /spin1.htm (2313 words)

	Bihrle Applied Research, Inc.: Services
		The existing simulation only exhibited a very benign non-oscillatory deep stall when a deep stall was captured, which ultimately was easy to recover from.
		The oscillatory deep stall is more difficult to recover from and was judged a better training condition.
		3) The majority of inverted deep stalls should exhibit significant yaw rates (20-30°/sec) with the pilot's feet on the floor, and should be unrecoverable unless the pilot applies the rudder in the correct direction.
	www.bihrle.com /site/services_sds_success7.html (610 words)

	Deep stall/superstall (Site not responding. Last check: )
		Kasper wanted to explore the plane's stall characteristics so, before a later flight, he adjusted the elevon linkages for more upward travel and attached tufts to the trailing edge so he could see when the air flow separated.
		This post stall behavior is commonly called the "mush mode" and Kasper spent several years studying it.
		NASA deep stall experiment using a modified sailplane.
	www.acsol.net /~nmasters/vortex-lift/stall.html (435 words)

	N2992 Accident Evaluation
		A deep stall impact involves a much higher descent rate than a gliding descent entails, along with an inability to control the impact point, due to lack of directional and/or pitch control.
		We give the second "deep stall" scenario a probability of 75% as the cause of the TYPE of crash that occurred, and the first "steep turn" scenario a probability of 25%.
		A deep stall during the turn, also leading to a very high descent rate, is a second, more probable scenario.
	www.cozybuilders.org /N2992_Accident_Eval (2683 words)

	Sleep Patterns in Horses
		Rousting your horse out of his stall at 3:00 AM to braid his mane, put him on the trailer, and haul to a show interrupts his usual sleep pattern.
		In fact, she says, mares at PMU farms, kept in tie stalls for extended periods so their urine can be collected, have standing and lying-down sleep patterns closer to those of wild horses than do horses in other stabling situations.
		Where bedding and stall flooring can become an issue is in the case of a horse who's older or who has a disability that makes getting up and down difficult.
	equisearch.com /horses_care/health/behavior/eqsleep1772 (861 words)

	Cross-Controlled Stalls - The Skidded Turn
		I've heard many different iterations of the definition of a stall in my dealings with students, but the bottom line is (with the very rare exception of a tailplane stall) that a stall is nothing more than exceeding critical angle of attack (AOA) of the main wing.
		Even worse is that since the stall is going to occur at or near the wingtip, the left aileron is involved in the stall almost immediately and that means reverse aileron effect may be involved from the outset of the stall.
		Skidded stalls tend to be nasty because they tuck "under the bottom" at the stall, as we have seen.
	www.apstraining.com /article5_fci_training_feb03.htm (4500 words)

	Stall Feeders - Horse Feeders - Noble Panels & Gates
		The NOBLE CORNER FEEDER is made of molded polyurethane and is designed to bolt into the corner of a stall.
		The unique shape of this stall feeder allows your horse to feed with its head at ground level, a natural grazing position.
		With a traditional wall or corner feeder that is mounted at head level, a horse will typically pull the hay out and onto the ground to eat, wasting food and dirtying stalls.
	www.noblepanels.com /corner-feeders.htm (162 words)

	What is the super-stall ?
		The stalled air moves forwards and inwards as A of A is increased toward the stall speed.
		This is undesirable, as the outboard ailerons quickly become within the stalled air and lose their control effectiveness.
		The swept wing aircraft will continue to nose-up despite a large percentage of the wing having stalled, as the centre of lift moves forward, creating a runaway pitch-up couple with the C of G. We are approaching a condition called the “super-stall”, or deep-stall”.
	www.aviationshop.com.au /avfacts/editorial/tipstall (257 words)

	Falcon 4.0: Allied Force (PC) Reviews. PC Games Reviews by CNET.
		A great example is the F-16's tendency to enter a "deep stall" when a ham-fisted pilot pushes the plane well beyond its flight envelope.
		Instead it enters a "deep stall" where the plane falls like a leaf and the nose gradually pitches up and down as the computer vainly tries to find some angle that will end the stall.
		Deep stalls also happen in the sim, and you get out of them exactly the same way you would in the real aircraft.
	reviews.cnet.com /pc-games/falcon-4-0-allied/4505-9696_7-31355056.html (1942 words)

	F-16 deep stall (Mary Shafer)
		That is, you have to pull up to a higher alpha and then push down though the deep stall region very quickly (this is sort of the reverse of the cobra, if you see what I mean--it's an overshoot that carries you through the positive augmented C_m_q region).
		Falling out of the sky in a deep stall is not a happy event and to my mind, it's a severe deficiency in the airframe.
		Let's think about balance here--if you want to balance a wooden pencil on your finger, you have to put your finger, which is the center of rotation, under the longitudinal center of gravity, which is closer to the eraser than to the tip.
	yarchive.net /mil/f16_deep_stall.html (871 words)

	Portable Shower Stall wih Dressing Room
		Simple to use, the plumbless portable shower stall with dressing room can be setup anywhere you want.
		Low cost, simple to use, highly effective and maintenance free the shower stall can be used anywhere in an office.or warehouse.
		The shower stall is not fastened to the floor or walls.
	www.shower-anywhere.com /Portable_Shower_Stall_with_Dre/portable_shower_stall_with_dre.html (331 words)

	Bihrle Applied Research, Inc.: Services
		An evaluation of stall characteristics in the simulation study performed by Bihrle revealed that the basic aircraft configuration exhibited a pronounced tendency to enter a deep-stall during routine stalls.
		The aircraft exhibited a pitch excursion through 50 degrees angle of attack and, in the case with the flaps deflected the deep-stall condition was captured even after the application of forward stick.
		Stall characteristics of the baseline configuration with flaps deflected
	www.bihrle.com /site/services_sds_success8.html (314 words)

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