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Topic: Dutch roll

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	Dutch roll - Wikipedia, the free encyclopedia
		Dutch roll is a type of aircraft motion, consisting of an out-of-phase combination of "tail-wagging" and rocking from side to side.
		The Dutch roll mode can be excited by any use of aileron or rudder, but for flight test purposes it is usually excited with a rudder singlet (short, sharp motions of the rudder to a specified angle, and then back to the centered position) or doublet (a pair of such motions in opposite directions).
		Dutch roll is also the name (considered by professionals to be a misnomer) given to a coordination maneuver generally taught to student pilots to help them improve their "stick-and-rudder" technique.
	en.wikipedia.org /wiki/Dutch_roll (621 words)

	Equilibrium, Stability, and Damping [Ch. 10 of See How It Flies]
		Dutch roll is a messy combination of rolling, slipping, and yawing.
		The rolling and yawing motions associated with Dutch roll are shown in figure 10.6; we will discuss the slipping component in a moment.
		First, bit of simple advice: in an airplane that is susceptible to Dutch roll, be extra careful to avoid uncoordinated usage of ailerons and rudder since that would unnecessarily put energy into the Dutch roll mode.
	www.av8n.com /how/htm/equilib.html (3591 words)

	LEARN TO FLY - GROUND AND FLIGHT TRAINING LESSONS (Site not responding. Last check: 2007-10-08)
		Dutch Rolls will be introduced in the early primary flight lessons in order to make these control applications easier to understand, and to allow the student to become more comfortable with coordinated control usage.
		Dutch Rolls as a purposely flown maneuver are different than the "dutch roll instability" we learn about when discussing aerodynamic stability.
		As the bank rolls through 30 degrees, you should have the same amount of back-pressure applied, and your pitch reference should be the same as you normally have a 30 degrees bank.
	www.ufly.com /lessons/max_maneuvers.html (4165 words)

	Warbird Notes
		Dutch roll happens when the aircraft has relatively strong static lateral stability (usually due to the swept wings) and somewhat weak directional stability (relatively.) In a Dutch roll the aircraft begins to yaw due to a gust or other input.
		Dutch roll is almost certain to happen in a jet aircraft is the Yaw dampener is turned off at high altitude.
		Recovery.- In recovering from the bank and rolling into the opposite bank, pressure to the left must be exerted on the stick and the pressure on the left rudder pedal increased (the amount depending upon aileron pressure), until the ship has rolled past the level position.
	www.douglasdc3.com /sohn/41.htm (2955 words)

	Dutch Roll/adverse yaw, difference?
		A roll input in the case of adverse yaw causes a yawing motion.
		In the case of dutch roll I believe it's the lack of yaw stability combined with the effects of dihedral in the usuall free flight or rudder+elevator models that causes the back and forth rolling effects.
		Dutch roll is the tail wagging side to side, with accompanying roll oscillation due to dihedral.
	www.rcuniverse.com /forum/m_1510512/printable.htm (1652 words)

	ASK DJ Aerotech Question
		The fact is that the amount of roll effect due to sweep depends on the cosine of the sweep angle, and (more importantly for this discussion) on the lift coefficient.
		To do a slow roll with rudder + sweep, you would have to reverse the direction of the rudder during the second half of the roll to keep the roll going in the same direction it had in the first half.
		Too little wing dihedral and the dutch roll goes away, but you get spiral instability (i.e.: in a turn, the plane wants to steepen up the bank and wind itself into a "graveyard spiral", all by itself).
	www.djaerotech.com /dj_askjd/dj_questions/dihedsweep.html (972 words)

	Arielle's Recipe Archives: Dutch 02 (Site not responding. Last check: 2007-10-08)
		Roll the mixture inside the cutlets and secure each roll with a toothpick.
		For each roll, place 2 slices of bacon parallel on the counter.
		Roll the bacon slices around the meat roll, then fold a third slice of bacon lengthwise around the meat roll to cover the ends.
	cyan.scarydevil.com /recipes/ethnic/dutch02.html (284 words)

	GORP - Food - Going Dutch - Campsite Cast-Iron Cooking
		After widespread use in the colonies, the Dutch oven followed the pioneers west as an indispensable utensil in the chuck wagon and the miner's mule pack.
		The traditional Dutch oven is a thick, cast iron kettle with a flat bottom and three short legs.
		Dutch ovens can take your campfire fare to a new dimension, and you do not have to be a gourmet to pull it off.
	gorp.away.com /gorp/food/dutch.htm (929 words)

	Recipe Menu - The Dutch Market - Importer of Dutch and European food and Gifts
		Close bag and gently roll around with your hands until the ball is covered in a light dusting of cocoa.
		Drain all of the moisture from the Dutch Oven and sitr in cheese.
		Place spinach, salt and water in a Dutch oven and cook for approximately 20 minutes or until the spinach is tender.
	www.dutchmarket.com /dutch_recipes.html (3259 words)

	Ethnic: Dutch 02 by Recipe Cottage
		rolls back into the the pan and add the lemon slices.
		rolls, covered, for about 40 minutes, until they are done.
		Roll the bacon slices around the meat roll, then fold a
	www.recipecottage.com /ethnic/dutch02.html (165 words)

	Flight dynamics - Wikipedia, the free encyclopedia
		Roll is rotation around the longitudinal axis—an axis drawn through the body of the vehicle from tail to nose.
		Applying an impulse via the rudder pedals should induce Dutch roll, which is the oscillation in roll and yaw, with the roll motion lagging yaw by a quarter cycle, so that the wing tips follow elliptical paths with respect to the aircraft.
		Since Dutch roll is a handling mode, analogous to the short period pitch oscillation, we shall ignore any effect it might have on the trajectory.
	en.wikipedia.org /wiki/Flight_dynamics (3339 words)

	The MacScouter -- Scouting Resources Online
		Put pan in 350 dutch oven for 30 min or until cheese is melted and bubbly.
		Roll rope in sugar mixture to coat evenly.
		If you are using foil, wrap the foil over the sides of the dutch oven, so that you have a "pan" inside that just rests on top of the water/other but won't fall in.
	www.macscouter.com /Cooking/DutchOvenRecipes5J.html (2684 words)

	Tiny new control device improves lateral stability of airplane
		The Aermacchi does not possess the ability, required of civilian planes, to be rolled upright using the rudder alone.
		However, Grenestedt said the canted tabs could also be used to reduce lateral stability and thus decrease Dutch Roll tendencies and stick forces during cross wind takeoffs and landings.
		Dutch Roll is an oscillatory motion, combining roll, slip and yaw.
	www.eurekalert.org /pub_releases/2005-05/lu-tnc051205.php (739 words)

	DUTCH ROLL AND REMOTE HEADS - WWW.URBANFOX.TV
		O'Connor Engineering has two new Dutch Heads, the 2060Z and the 2575Z.
		The RollAxis is a new add-on section for 360 degree Dutch rolls, on the Egripment HotHead and HotShot, for cameras up to 15kg.
		CamMate also has a new 360 degree Dutch roll feature on its electronic head that has automatic centring.
	www.urbanfox.tv /articles/cameras/c23dutch-roll.htm (1110 words)

	More ROLL Families (Genealogists have not determined if they are related to our German-Russian ROLL Family)
		The mission of the Roll Family Genealogy Windmill is to share what we have of the genealogy of the ROLL, VAN WOGGELUM, and related families, along with biography and the history related to their lives and times.
		His great-great-great granddaughter is Anna Maria Roll, born February 12, 1744 in Oberjettingen who emigrated in 1782 with her husband Johann George Fortenbacher and her 4 children to west Prussia (now Poland).
		Friedrich's father, Godfried ROLL, served in the Russian Czar's army and was born January 22, 1844 in Zakrzyna, Congress Poland.
	www.rollintl.com /roll/moreroll.htm (2202 words)

	Airdisaster.Com Forums - Dutch Rolls
		Have read where you mentioned Dutch Roll tendencies and yaw-dampers before- but this time noticed that you said it could conceivably build up until the plane is out of control.
		I was once taught to do Dutch Rolls as a coordination exercise- in this case you were supposed to rock the wings, while keeping the nose pointed STRAIGHT ahead.
		I am aware that performing dutch rolls can be part of a stability exercise during flight training in small aircraft.
	www.airdisaster.com /forums/showthread.php?t=52910 (470 words)

	Byron's Dutch Oven Recipes - Garlic Cheese Rolls
		Roll dough generously in flour, then cover and place in a warm area free from drafts to raise until double in size.
		Roll dough lengthwise like a jellyroll and cut into 13 1-inch rolls.
		Place rolls in a lightly greased 14" Dutch oven with 8 rolls around the outside edge, 4 rolls forming an inner circle, and 1 roll in the center.
	papadutch.home.comcast.net /dutch-oven-recipe-garliccheeserolls.htm (213 words)

	Dutch
		A bargain settled over drinks, the Dutch being formerly reputed to be steady drinkers.
		The term used to describe collectively certain kinds of garden bulbs, supplies of which largely are imported from Holland, which are planted in the fall for spring bloom.
		An open frame constructed of cane, originally used in the Dutch East Indies and other hot countries to rest the limbs in bed; also a bolster used for the same purpose.
	homepages.cwi.nl /~sjoerd/dutch.html (754 words)

	Worldwide ROLL Family Genealogy - Surname Databases
		Robert A. Roll of Capron, IL is researching the ROLLs from the Kleinbeubach/Miltenberg, Baden, Germany area.
		Heinric ROL, an Anabaptist leader and martyr, was born in Grave, Dutch province, North Brabant and was burned at the stake in 1534 at Maastricht, Dutch province of Limburg.
		Heinrick was born at Grave in the Dutch province of North Brabant and moved to Muenster, West Phalia, Russia in 1532.
	www.rollintl.com /roll/rolldata.htm (5870 words)

	Helldiver behavior
		Dutch roll is usually caused by not having enough vertical tail stability.
		But the mention of Dutch roll and all the following discussion applying it to your situation was pertinent.
		Dutch Roll is a symptom of incorrect lateral area and balance.
	www.rcuniverse.com /forum/fb.asp?m=4912868 (2228 words)

	Unox Smoked Sausage Rolls: Dutch Taste - the Grocery for all your Dutch food and drinks.
		Unox Smoked Sausage Rolls: Dutch Taste - the Grocery for all your Dutch food and drinks.
		There are 3 rolls and 3 smoked saugases in this package and 3 mustardsauce.
		This is the most Dutch roll of Holland.
	www.dutchtaste.com /unox-broodje-unox-p-1621.html (74 words)

	Roll-Wise Torque Budget [Ch. 9 of See How It Flies] (via CobWeb/3.1 planetlab2.tamu.edu) (Site not responding. Last check: 2007-10-08)
		It will roll to the left if the engine is speeding up, and it will roll to the right if the engine is slowing down.
		Far from reducing the rolling moment, increasing the angle of attack on the inside wing (which is stalled) only makes the situation worse.
		A slip tends to cause a rolling moment, for several reasons, including: dihedral produces slip-roll coupling; the fuselage shadowing one wing (especially on a high-wing airplane) produces slip-roll coupling; swept wings produce slip-roll coupling, and a tall rudder that sticks up above the roll axis produces slip-roll coupling.
	www.av8n.com.cob-web.org:8888 /how/htm/roll.html (3397 words)

	AOE@VT:
		The results of flight tests to increase the dutch roll damping of the Sino Swearingen SJ30-2 business jet using rudder trailing edge T-strips are presented.
		For this application, the trailing edge modification was used expressly to increase dutch roll damping.
		Trailing edge T-strips are a simple add-on fix to increase dutch roll damping without forcing the redesign of the wing or vertical tail.
	www.aoe.vt.edu /news/seminardetails.php?id=45 (256 words)

	CNN.com - Heads roll at Dutch retailer - Feb. 24, 2003
		Dutch retailer Ahold, one of the biggest food retailers in the world, said on Monday its chief executive and chief financial officer would resign after accounting irregularities were found at its U.S. Foodservice unit.
		Ahold, which issued two profit warnings last year, said its 2002 net profit would be significantly lower than expected and that it would have to restate earnings for 2000, 2001 and last year's interim results.
		The Dutch group has taken a knock from difficult trading conditions and its enormous exposure to the world's biggest economy, making it vulnerable to any downturn there.
	www.cnn.com /2003/BUSINESS/02/24/ahold.reut/index.html (390 words)

	ASK DJ Aerotech Question
		Have a range of dihedrals and fin areas that are free of both dutch roll and spiral instability.
		Because the dutch roll/spiral stability balance is so sensitive, it becomes a good measuring tool for how equivalent two different types of tail are.
		The dutch roll/spiral stability balance is one very useful measure of that equivalency.
	www.djaerotech.com /dj_askjd/dj_questions/dutchroll1.html (473 words)

	Central College women's soccer news
		The Dutch finished their season with a 4-3 upset.
		The Dutch dropped a 4-0 Iowa Conference decision Wednesday.
		Dutch find back of the net 8 times for 8-0 win.
	www.central.edu /athletics/soccerwomens/index.html (226 words)

	Dutch Roll - PPRuNe Forums
		I was told that Dutch Roll was so named after the rolling stumbling amble of drunken Dutch sailors, of course that could just have been the way Dr Berstein described it to students to help them remember.
		The earliest known skating technique, the Roll involves leaning from side to side on alternating feet using the inside edges of the skate.
		I remember someone mentioning that the term dutch roll is derived from Dutch sailing ships during the times of the East India Company.
	www.pprune.org /forums/showthread.php?threadid=175147 (779 words)

	Dutch roll coordination technique [Archive] - AviationBanter
		January 1st 04, 03:58 PM There is a co-ordination exercise called Dutch Roll.
		Dutch roll, a stability and control term, is a condition of a
		January 1st 04, 09:16 PM The proper use of the term "Dutch Roll" applies to a characteristic of
	www.aviationbanter.com /q-t_16210-Dutch-roll-coordination-technique.html (1480 words)

	Historic Pella - Old Dutch Recipes
		Bake in moderate oven until light brown; do not roll but drop a teaspoonful of the mixture about 4 inches apart in well buttered tins.
		Roll with as little flour as possible into a large thin sheet.
		Let stand overnight in a cold place; when ready for use cut off a small piece and roll as thin as cardboard; have two sized cutters and cut three pieces with the largest one and place on top of each other using a little water and flour to make them stick together.
	www.pellatuliptime.com /historical-village/history/recipe/recipes.html (2096 words)

	That's how the Dutch roll - b15sentra.net forums
		Insouciant of police warnings, a Dutch group is reportedly set to roll the world's biggest joint, sending the previous record for a marijuana cigarette up in smoke.
		, rolled with cigarette paper and easily dwarfing the previous 100-gram winner, the ANP news agency said.
		The Dutch police are not amused however, warning they will intervene if the joint surpasses the five grams of marijuana allowed for consumption and sale in the Netherlands.
	www.b15sentra.net /forums/showthread.php?t=141079 (214 words)

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