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Topic: Dynamic soaring

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	Dynamic soaring - Wikipedia, the free encyclopedia
		Dynamic soaring is a flying technique used to gain kinetic energy without effort by repeatedly crossing the boundary between air masses of significantly different horizontal velocity.
		Such zones of high wind gradient are generally found close to obstacles and close to the ground, so the technique is mainly used by birds, but glider pilots have occasionally been able to soar dynamically in meteorological wind shears at higher altitudes.
		Some seabirds dynamically soar by repeatedly diving into the valleys of ocean waves, and then wheeling back up into the air.
	en.wikipedia.org /wiki/Dynamic_soaring (507 words)

	Radio-controlled glider - Wikipedia, the free encyclopedia
		Slope soaring uses the lift produced by wind blowing up the face of a steep slope on hills, mountains, and cliffs.
		Dynamic soaring, ultilizing the leeward or "backside" of a hill, has recently become very popular.
		Dynamic soaring is a relatively new style of flying model gliders whereby the windshear just downwind of certain slopes can be used to create high speeds.
	en.wikipedia.org /wiki/Radio-controlled_glider (810 words)

	Slope soaring - Wikipedia, the free encyclopedia
		Slope soaring is a technique to gain height in a full size glider or with a radio-controlled glider by flying it in the updraft produced by wind blowing up the face of a steep slope.
		Slope soaring requires a hill and a wind that is blowing on the face of the hill.
		The wind will create a region of rising air directly in front of the hill which may extend quite a distance upwards and outwards from its face because the airflow follows the contour of the hill (this is called orographic lift).
	en.wikipedia.org /wiki/Slope_soaring (261 words)

	Soaring methods of birds as related to model rockets (Site not responding. Last check: 2007-10-20)
		Soaring is the name given to that portion of flight in which the animal uses the minimum amount of energy to maintain flight.
		Soaring birds usually glide using horizontal and vertical air movements, and exert muscular energy only to correct position and to hold their wings down in the horizontal position.
		Soaring that depends on vertical movements of the atmosphere has been termed as static soaring, as opposed to dynamic soaring where energy is extracted from variations in horizontal wind speed.
	www.apogeerockets.com /education/Soaring_methods.asp (1467 words)

	Bird Dynamic Soaring Diagram (Site not responding. Last check: 2007-10-20)
		Quite different physical principles underlie the soaring flight of seabirds, such as albatrosses, large petrels, and shearwaters.
		The air masses that these gusts drive before them are slowed by friction at the water surface, and their speed is consequently slower than in higher altitudes.
		These seabirds have developed a type of soaring and gliding that does not depend upon the presence of either thermal or obstruction currents.
	www.paulnoll.com /Oregon/Birds/flight-dynamic-soaring-diagram.html (83 words)

	::Aero-Experiments::
		"Dynamic soaring" is the exploitation of gusts or gradients to extract energy from the atmosphere.
		Another form of "dynamic soaring" extracts energy from transient side-gusts or up-drafts or down-drafts by changing the direction and/or the magnitude of the aircraft's lift vector (G-loading).
		Dynamic soaring "type 3": various ways to use transient gusts, and to use the transition between still air and lift or sink, far from the earth's surface, such as are now being explored by full-scale sailplane pilots:
	www.aeroexperiments.org /dynamicsoaring.shtml (1299 words)

	Soaring
		The high-aspect-ratio wings of soaring seabirds minimize drag, since the amount of wingtip is small in comparison with the length of the wing.
		Albatrosses and other soaring seabirds use their high wing loading and high-aspect-ratio wings to take advantage of the slope lift, updrafts created on the windward slopes of waves in the same manner they are created on mountain ridges.
		That process has been called "dynamic soaring," but recent work by a leading authority on bird flight, Colin Pennycuick, indicates that slope soarers gain relatively little energy in that way.
	www.stanford.edu /group/stanfordbirds/text/essays/Soaring.html (662 words)

	Bird Flight
		Soaring flight is a special kind of glide, in which the bird flies in a rising air current.
		Soaring birds can also find rising air in places where the wind is forced to flow up the side of a hill.
		Dynamic soaring works best in places where there are no upwind obstructions that would block the wind and cause turbulence.
	www.ornithopter.org /birdflight/soar.shtml (511 words)

	Soaring Photos
		JW on dynamic soaring in Fei Ngo Shan
		Hades on dynamic soaring in Fei Ngo Shan
		Mininch on dynamic soaring in Fei Ngo Shan
	www.rcsail.com /soaring_photos.htm (556 words)

	Charles River Radio Controllers - Dynamic Soaring Anthology
		Start doing the orbiting for the dynamic soaring and you can get up to about three times the speed that you can when you just fly in the normal slope lift.
		The energy increase in dynamic soaring is due to flying into a airmass that gives you a change in airspeed "free" of charge.
		Dynamic soaring requires air that is moving in a particular way.
	www.charlesriverrc.org /articles/flying/dynamicsoaring.htm (1708 words)

	Dynamic soaring
		Albatrosses are particularly adept at exploiting the technique and they use it to travel many thousands of miles with hardly any expense of energy.
		In his 1978 book Streckensegelflug (Cross-Country Soaring), Helmut Reichmann describes a flight made by Ingo Renner in a Libelle sailplane over Tocumwal in Australia on 24 October 1974.
		It is licensed under the GNU free documentation license.
	www.ufaqs.com /wiki/en/dy/Dynamic%20soaring.htm (482 words)

	Atlas: Periodic Optimal Control for Dynamic Soaring in the Shear Wind Associated with Jet Streams by Orlando da Costa (Site not responding. Last check: 2007-10-20)
		Dynamic soaring is a flight technique by which energy is extracted from horizontally moving air and transferred to the sailplane.
		It is shown that the minimum shear wind gradient required for dynamic soaring with modern sailplanes is of a magnitude that exists or is even significantly exceeded in shear wind regions associated with jet streams.
		Thus, it is shown that the performance characteristics of modern sailplanes are sufficient for performing dynamic soaring in the shear wind region associated with jet streams.
	atlas-conferences.com /cgi-bin/abstract/casp-15 (441 words)

	Soaring Seabirds in Bird Flight
		It is this semmingly endless form of flying that allows the albatross to survive, since albatrosses cannot fly in the absence of wind.
		Since soaring flight over the oceans places quite different demands on the physiology on the bird tan does soaring in thermals, the wings of soaring seabirds have evolved quite differently from those of soaring land birds.
		To utilize the lift from rising air masses, the wings of a soarinf land bird need to be broad and to present a large surface area; excessive length would cause difficulties in maneuverability.
	www.paulnoll.com /Oregon/Birds/flight-soaring-seabirds.html (523 words)

	Dynamic Soaring
		Soaring = using sources of atmospheric lift to maintain or gain altitude.
		Dynamic soaring = increasing airspeed by exploitation of the difference in speed of two adjacent masses of air.
		While DS'ing, normal ridge-lift soaring is relegated to "priming" the plane for its initial plunge down the backside of the ridge to kick off the first DS circle.
	www.geocities.com /soaringbythebay/dsoar.htm (1182 words)

	illumin : article : Dynamic Soaring
		Dynamic soaring is a specialized form of gliding flight that has not yet been thoroughly researched.
		Early observations of dynamic soaring in literature occur as early as the 16th century.
		In a posted correspondence, aerospace engineer Blaine Rawdon explained that dynamic soaring requires air to move in a particular way: a steady strong wind moving along a surface.
	illumin.usc.edu /article.php?articleID=63&page=1 (390 words)

	Dynamic Soaring (DS)
		DS differs from conventional soaring in that it doesn't use rising air to sustain flight.
		DS is not new by any means as the Royal Albatross uses dynamic soaring as it flies over the ocean.
		It is done using the different wind speeds that occur as a result of the wind gradient that occurs over the ocean.
	members.tripod.com /douglasturner/id27.htm (610 words)

	The Oz Report hang gliding news - 6.137 Jul.14 '02 (Site not responding. Last check: 2007-10-20)
		Throughout the years dynamic soaring has been regarded by many as some kind of mumbo jumbo akin to a perpetual motion machine, alchemy, or cold fusion.
		Dynamic soaring was first written about over seventy years ago.
		Dynamic soaring could be demonstrated on the proper hill but it could also be demonstrated with instrumentation that recorded the rate of change of total energy.
	www.davisstraub.com /OZ/Ozv6n137.htm (3421 words)

	Dynamic Soaring :
		Let’s look for a moment at the sailplane’s energy losses; for the energy we can extract from the air by dynamic soaring is of no benefit unless it is greater than the additional losses (negative power) caused by the extra maneuvering required.
		We’ve seen how the dynamic power extracted from the atmosphere is equal to the velocity of the air (in a local inertial reference frame) multiplied by how hard we can push against it with the wing.
		In the future there will be instruments designed specifically for dynamic soaring, but here, let’s look at some dynamic soaring techniques that we can use with standard instrumentation.
	icarusengineering.com /Dynamic-Soaring-and-SE.htm (4194 words)

	Dynamic Soaring in Fei Ngo Shan
		The ultimate goal of dynamic soaring is to increase the airspeed of the sailplane by exploiting the difference in speed of adjacent layers of air.
		The basic idea of dynamic soaring is that the glider is repeatedly flown across the separation layer.
		Dynamic soaring is an extremely dangerous sport as DS'ing sailplane travels closed to the ground in very high-speed, a small mistake will have a disaster result.
	www.rcsail.com /dsinfns.htm (807 words)

	Bird Form and Function: External Anatomy
		Many birds are able to travel easily from place to place by "riding" these thermals up and then gliding from a great height to another thermal.
		The daily routine of many large soaring birds, especially hawks and vultures, includes surveying great expanses for prey while riding thermals.
		These birds are able to soar at 30 miles-per-hour using these currents from moving storm fronts.
	www.saturdaze.net /prv/bio151s03.htm (271 words)

	Homepage
		No, not a reference to Star Wars but to the phenomenon of Dynamic Soaring or DS as it is better known.
		In fact it is possible to soar a glider so fast that it will far exceed the speeds that you may be able to achieve flying on the frontside of the hill.
		If you also get onto your favourite internet search engine and look up Dynamic Soaring, sure you'll turn up the Albatross stuff but most of what you find will be postings from the ever increasing band of followers that this revolutionary form of slope soaring is ensnaring across the globe.
	www.slope-zone.de /Dynamic_Soaring/how-works-ds.htm (1564 words)

	Ornithology Lecture Notes - Flight II
		Dynamic soaring -- Albatrosses perform a fascinating and complicated flight maneuver called dynamic soaring, in which energy can be extracted from horizontally moving air and transferred to the bird so that an energy gain is achieved which enables it to fly continuously without flapping.
		Dynamic soaring is possible when the wind speed changes with altitude.
		Dynamic soaring consists of periodically repeated cycles, with one cycle illustrated to the left:
	people.eku.edu /ritchisong/554notes3.html (3860 words)

	Brookville Slope Site (Site not responding. Last check: 2007-10-20)
		Not exactly the midwest, but there is beauty in slope soaring at Torrey Pines.
		Winds out of the South is what is best, however those who wish to fly north winds may try their hand at "dynamic soaring".
		Slope Soaring Without Mountains - Why R/C is a good excuse to go to the beach.
	www.cincinnatisoaring.org /brookvile_slope.htm (163 words)

	Dynamic Soaring
		Slope soaring is a very enjoyable hobby - provided that you don't (as I do) live in the flatest of landscapes.
		The principle of flying a downward glidepath in a rising area of air so the loss in altitude is regained is well established.
		The full scale record for slope soaring is 36 hours 36 mins in the air - only limited to human endurance.
	forums.howwhatwhy.com /showflat.php?Cat=&Board=air&Number=174877&fpart=1 (461 words)

	Dynamic Soaring
		The difference between DS and slope soaring is that slope soaring usually involves flight within or at least passing through some sort of lift volume, typically on the upwind side of some object that is deflecting the wind upward.
		Dynamic soaring, on the other hand, is not so much dependant a steady lift volume as it is on repeated transition of the vehicle through a shear zone.
		A tree or set of trees, an apartment building or large house, a bill board, large walls or solid fences, and many other objects may be successfully soared on the downwind side, or "backside", using Dynamic Soaring techniques.
	www.handlaunchaerobatics.com /HTML/DynamicSoaringPages/DynamicSoaring.html (969 words)

	RADIO CARBON ART OFFICIAL INFO GRAPHICS PAGE (Site not responding. Last check: 2007-10-20)
		Soar Utah features the best scale warbirds and jets gliders flown by expert pilots during incredible lift conditions.
		Features the world’s largest soaring contest, the first dynamic soaring speed trials, Alpine soaring from Switzerland, and slope soaring action from California.
		Soaring expert Paul Naton takes you through all of the steps required to maximize the performance of your sailplane.
	www.radiocarbonart.com /Pages/dealerlogos.html (1322 words)

	Cape Blanco Slope Soaring - R/C Model Airplanes Ride the Wind
		Model soaring is both an art and a science and reportedly the fastest growing segment of model aviation.
		Inherently friendly to the environment and considerate of nearby neighbors, it is both a quiet communion with nature, and one that provides a great outlet for creative and competitive desires.
		ynamic Soaring is a type of Slope Soaring that uses a flying technique which can result in one's glider attaining speeds in excess of 150 mph.
	www.homebythesea.com /CapeBlancoSlopeSoaring.html (644 words)

	Lawrence Hargrave: Australian Aviation Pioneer
		It includes soaring on both sides of the ridge, the claim being this is dynamic soaring.
		There is no doubt that you can continually soar close to both side of a wind-swept ridge and I applaud the imagination and skill of those who have demonstrated this.
		According to Piggott, In the early days of soaring there were many attempts at dynamic soaring in hill lift with varying degrees of success.
	www.ctie.monash.edu.au /hargrave/fogel.html (1145 words)

	Charles River Radio Controllers - Dynamic Soaring 101
		Dynamic Soaring has gotten a lot of interest lately, and has now been refined to a well-developed flying style.
		For a while I've been curious about why dynamic soaring works, having been treated to a number of "interesting explanations".
		It is pretty exciting when you hit great DS for the first time, especially that first time it comes back up the hill at you going faster than it went down.
	www.charlesriverrc.org /articles/flying/markdrela_ds.htm (942 words)

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