Towing kite propulsion system.
For an Atlantic crossing with 20.
Towing kite propulsion system Maybe I'll put some work on this idea. Decarbonizing shipping industry Similar to the aviation sector’s 3. ) aren’t cheap – they cost anywhere from $450,000 to $3 million This article introduces the towing kite technology, its dependencies and the steps taken towards realizing airborne wind energy farms in the future. “ of the Wessels Shipping Company demonstrate how the towing kite propulsion system Towing kite system refers to the equipping of a cargo ship with an automatically operated towing kite in order to save propulsion energy by using wind power. It can be installed on new builds and existing vessels. Their shape is similar to that of a paraglider. Mar 30, 2008 · The system can control the kite at heights between 100m and 500m to maximise the benefit of the wind. Steered by the control pod, the towing kite performs regular dynamic flight maneuvers in the air in front of the ship to generate tractive force. Virtually all existing cargo vessels and new builds can be retrofitted or outfitted with the SkySails system. Asit is seen in Figure 2, the towing kite is made of high-strength and weatherproof textiles. Towing kites have relatively little impact on heel and yaw angles on the ship and have a positive contribution to the course keeping of the ship and it requires much less corrections on the rudder and much less rudder action than deck Oct 31, 2023 · Of further importance, the SkySails-System is designed for operation in predominantly prevailing wind forces of 3 to 8 Beaufort at sea. Automatic launch and stowage of the kite. In other words, SkySails designs high-altitude flying kites attached to cargo ships that essentially "pull" the ships, reducing the ship's fuel costs and CO2 emissions by 10-35%. ” Steered by . Hence, this study investigates the option of applying a towing kite to an existing tanker vessel as a hybrid propulsion system. Kites fly much higher than traditional sails where the wind can be as much as 2x the strength. Aug 23, 2013 · SkySails is a patented propulsion system that uses large kites to harness the power of wind to reduce fuel costs and emissions for cargo ships. (abt. Nov 10, 2012 · In this paper, we present the basic features of the flight control of the SkySails towing kite system. The eco-friendly system reduces fuel consumption and offers a new comfort in yachting. SkySails GmbH is a midsized innovative company from Hamburg, Germany. Compared to other wind system, kites can increase the experienced apparent wind by flying in the wind window (Fig. Feb 1, 2016 · An optimization process dedicated to kite auxiliary propulsion on a ship was developed. 8. Our kite systems enable boats to be powered by the force of kites. This includes the analysis of existing wind propulsion systems and matching of the kite propulsion system to a selected vessel using mathematical models. With the WingCommander the system can be flown fully automatic. Jul 5, 2007 · This year has seen the introduction of SkySails-Systems with towing-kite areas of up to 320 square meters that can be used for cargo vessels, superyachts and fish trawlers. Since 2007, Skysails has developed several generations of commercial towing kite products. Ships copy the principle of kiteboarding The idea of using sails and kites is not totally new. 0 Unported The launch and recovery process is widely automated and requires only a few simple actions on the foredeck by the ship´s crew. In rotor sail sys tems, Feb 18, 2018 · This towing kite forms the core of the SkySails Yacht propulsion. ” Steered by the control pod, the towing kite performs regular dy- namic flight maneuvers in the air ahead of the ship to generate propulsion. Their double-wall profile gives the SkySails towing kites aerodynamic properties similar to the wing of an aircraft. Even as the only means of propulsion if wind's strong enough. This is called the dynamic mode. Full production will • A towing kite with rope • A launch and recovery system • A control system for automatic operation Instead of a traditional sail fitted to a mast, SkySails uses large towing kites for the propulsion of the ship. After the basic concepts had been Although the towing kite has problems with deployment and recovery for the operation, systems are now designed to perform deployment and recovery automatically using the bow mast, and large towing force can be obtained because kite tu rn in a figure 8 motions and move at high speed acting as a wing. The parasail-like kite The wind assisted systems generate thrust from the wind and thereby reduce dependence on fossil fuel and main engine operation. SKYTUG Wind Propulsion towing service. Figure 2, Towing Kite[2] Jan 1, 2011 · Also in this field, research activities have been recently carried out, mainly to study the control design for power kites used to tow a boat (see Houska and Diehl (2006); Fagiano et al. Many translated example sentences containing "towing kite propulsion" – German-English dictionary and search engine for German translations. What makes it so special is a new wind propulsion system with a huge towing kite that provides additional thrust for the ship at sea – a sustainable solution for reducing fuel consumption, costs Introduction –Towing Kite, Turbo Sail Principle: A kite catches the wind in forward direction and tows the vessel for propulsion. Strong winds at higher altitudes can be utilized. Feb 16, 2012 · Fig. Mar 2, 2010 · The vessel, chartered by GE’s Project Logistics team to carry power-generating equipment, boasts the first towing kite propulsion system for a commercial shipping vessel. Airseas will deploy its automated Seawing system on a cargo " Ceremonious christening of first cargo vessel worldwide with innovative auxiliary propulsion system. (2010)). ft. The SkySails towing-kite propulsion system uses offshore wind power (a kind of “wind hybrid” propulsion assistance) to Due to prevailing winds and other limitations of the kite system, it is assumed that the kites can only be used 20% and 30% of the time for small and large ships, respectively. SkySails kites are the key technology for capturing the vast potential of high-altitude winds, and SkySails is the first company in the world that has succeeded in developing towing kite technology into an industrial application Oct 1, 2009 · In order to achieve a wind propulsion system for ships, a towing kite following a dynamic trajectory is the most interesting candidate for such a purpose [17], [27]. The kite flies at wind-rich altitudes of 25 – 150 meters, pulling the boat with up to 10 times the power of a sail of the same size. Compared to other wind power technologies, kites have some advantages: they may operate at higher altitudes where wind speeds are often greater; they fly in front of the ship and therefore do not take up any Jan 1, 2022 · The towing kite is a rope system connected and operated air-inflated elliptical shaped aerofoil, that can fly freely in the air, and being moved through the combination of the induced aerodynamic forces and the piloting from a deck mounted winch system. Based on modelling and preliminary land-based tests, Airseas estimates that the Seawing system can reduce fuel consumption and greenhouse gas emissions by an average of 20%. Lufinha hopes to leave Portugal and arrive in the Caribbean three to four weeks later, depending on the weather and ocean conditions. Moreover, a system for naval propulsion using power kites has been also industrialized (see SkySails GmbH & Co. It consists of a kite, a launch mast, a turntable, sensors, a KiteBox (winches and autopilot) and a steering interface. 200m high) Towing Kite Turbo Sail (Suction Wing) Jan 21, 2008 · The wind propulsion system, which features a towing kite measuring up to 320 square meters, was developed by the Hamburg firm SkySails and can now be used on ocean-going vessels for the first time. Diverses solutions sont immédiatement disponibles pour aider les acteurs du transport maritime à atteindre l’objectif de diminuer de 40% leurs émissions de CO2 d’ici 2030. Currently the K1-10 V2. Table 1 Overview of size of kite and power generated Guests of The Brando are cordially invited to test the catamaran themselves for a few hours and to get to know the towing kite system as propulsion for yachts during the two days. The shape of the kite has been uncompromisingly optimized for use as a towing kite. Nov 29, 2018 · It is concluded that the mean kite towing force can be increased whereas the ship roll amplitude can even be decreased compared to a non-kite assisted ship propulsion configuration. Cheers. SkySails propulsion is already in use aboard the cargo ships "Beluga SkySails" owned by Beluga Shipping, as well as on the "Michael A. It is the market and technology leader in the field of automated towing kite systems. This tractive force is transmitted to the • A towing kite with rope • A launch and recovery system • A control system for automatic operation Instead of a traditional sail fitted to a mast, SkySails uses large towing kites for the propulsion of the ship. In this paper, alternative propulsion systems such as kite-assisted propulsion, Flettner rotor, and wind turbine systems and their applications to the small crafts have been investigated. This new technology can tow cargo vessels and superyachtsreducing fuel consumption by 10 to 35percent on annual average. Here, we look at two different kite systems from two companies, SkySails and KiteShip. An integrated Autopilot ensures that the towing kite flies defined patterns. Both static and dynamic flight cases were considered regarding an optimization strategy for kite tow efficiency. It was reported that small Dec 2, 2013 · The SkySails method, designed as an auxiliary propulsion system to help offset the environmental and financial costs of running diesel engines, uses a towing kite that is capable of flying in the stronger winds 100-300m above a vessel, which the company says creates up to 25 times more energy per square metre than standard sails. I'm not thinking about the kite as "coming home" option only, but as auxiliary power at all times when direction of wind allows. It is currently available in two versions: 10-metre and 20-metres. In 2007, the "Beluga Skysails" was fitted with a towing kite booster and sailed across the Atlantic Ocean Mar 10, 2010 · The crew comprises over 40 members during fishing trips. Feb 1, 2010 · Image by Tidewater Muse via FlickrA German company called SkySails GmbH & Co. 18 ms À1 wind, a time averaged propulsive force of 16. A 1000m² sail surface to harness the power of the wind and tow ships. And since the ‘Skysails’ technology allows the towing kite to gain a height of anything between 100 metres – 300 metres, it becomes implied that this is the height Mar 17, 2008 · The SkySails system consists of three simple components – a towing kite with a rope, a launch and recovery system, and a control system for automatic operations. January 23, 2008 Hamburg-based SkySails has announced the first test of its towing kite propulsion system during regular shipping operations. Particularly interesting for small commercial fishing boats. 2. 000l this is about 53t CO2 saving. Around the turn of the millennium, the Hamburg-based company SkySails was already experimenting with a fully automated towing kite propulsion system which should act as a support to the motors of cargo ships and large yachts. WingCommander X60 - the system is designed to sail vessels up to 60' feet boat length with the kite only. Asit is seen in Figure 2, the towing kite is m ade of high-strength and. Jan 1, 2022 · Skysails towing kite propulsion system Schematic representation of the structure of the Seawing [11] Figures - available via license: Creative Commons Attribution 3. Since 2001, the company has developed propulsion kites of up to 400 m² wing surface area for ship propulsion and energy production purposes. We then present the controller design, which we successfully Jan 3, 2022 · Use of wind-propulsion devices like towing kites and rotor sails set to double in 2022, experts say. A 160m² SkySails towing-kite propulsion system works to relieve the ship's main engine. The K1 Kite Propulsion system consists of five sub-systems. After introducing the coordinate definitions and the basic system dynamics, we introduce a novel model used for controller design and justify its main dynamics with results from system identification based on numerous sea trials. 1 and Fig. Nov 15, 2021 · Along with increased interest in SkySails and other commercially operated kite propulsion systems, there has been increased research into towing kite optimal configuration and operation. Skysails Yacht in brief: Founded in 2017; Technological leader of the market for automated towing kites for yachts; Relies on 15 years’ experience from SkySails Group GmbH, its parent company renowned for its towing kite system for cargo ships; Technology The latest measurements made aboard the cargo ship “Michael A. (2011) developed a mathematical model for predicting performance characteristics for kite sails used as ship propulsion. The ship was launched and followed early sea trials in the North Sea in January 2008, the vessel embarked on its maiden voyage from Bremerhaven, Columbuskaje to Guanta, Venezuela. Jan 1, 2013 · SkySails develops and markets large automated towing kite systems for the propulsion of ships and for energy generation. One key component of the 2. Today, the advanced system of Sky Sails pulls the research and ocean Viele übersetzte Beispielsätze mit "towing kite propulsion" – Deutsch-Englisch Wörterbuch und Suchmaschine für Millionen von Deutsch-Übersetzungen. For an Atlantic crossing with 20. Combining kite assisted propulsion with solar energy generation and additional systems like Wartsilla’s marine fuel cell and ultra-effectiant bottom coatings, has potential to provide the one Aug 19, 2020 · Seawing is a kite system that assists vessel propulsion by towing commercial ships using wind power, reducing the power demand on the main engines. The 132m long Multi Purpose Heavy Lift Carrier MS A final resort emergency system is a pneumatic rope cutter, disconnecting the kite totally from the vessel. Furthermore, the MV “Beluga SkySails” even combines ecology and economy on the high seas. Nov 27, 2018 · After years spent in research and development, its first product, a kite for towing pleasure boats, the LIBERTYKITE®, was put on the market in June 2017. Features: Automatic control of the kite flight. One key component of the Nov 30, 2011 · The innovative SkySails Propulsion System uses wind energy to reduce fuel costs and emission levels. The company says that depending on the prevailing wind conditions, a ship’s average annual fuel costs can be reduced Dec 16, 2009 · SkySails is offering towing kite propulsion systems for cargo vessels with an effective load of between 8 and 16 tonnes. In rotor sail sys tems, It operates at 100-300m above surface level - much higher than a normal sailing craft - where winds are stronger and more stable. Currently Skysails offers towing kite propulsion systems for cargo vessels with an effective load of between eight and 16 tonnes and is developing for up to 32 tonnes with a planned product for up to 130 tonnes. Beluga Shipping GmbH, a Bremen, Germany-based shipping company, has purchased a new towing-kite propulsion assist system from SkySails, a start-up company in Hamburg, Germany. (Earlier post. Beluga Shipping GmbH has launched the 140m MV Beluga Skysails, the world’s first application of the SkySails towing kite auxiliary propulsion system on a cargo vessel. Since 2008 pilot customer vessels have been operating propulsion kites in order to reduce fuel costs and emissions. Apr 15, 2011 · A SkySails towing kite (top, R) propels the cargo ship MV Theseus in the North Sea, off the German coast, as seen during a demonstration of the SkySails auxiliary wind propulsion system. the control pod, the towing kite performs regular dy-namic flight maneuvers in the air ahead of the ship to generate propulsion. The ram-air kite, [3] while 1-2 orders of magnitude larger, bears similarities to the arc kites used in kitesurfing. 57 m s −1 by classical rig (1. Beyond the Sea by Yves Parlier has created the SeaKite, a complete automated kite traction system that is environmentally friendly. Discussion in 'Boat Design' started by brian eiland, Nov 20, 2007. With the price of oil so high, an average 87m cargo ship could save nearly €300,000 a year. Dec 17, 2024 · The history of kite-based boat propulsion dates back over several hundred years when frame kites were used to tow boats over short distances, when wind direction was suitable. KG is helping cargo ships go green with a system called towing kite systems, a wind propulsion mechanism based on large towing kites. Wind is the cheapest, most powerful and greenest source of energy on the high seas. Figure 3. Mar 6, 2020 · The industry partner SkySails GmbH is the market and technology leader in the field of marine towing kite systems. The carrier serves as an up-to-date link between economic efficiency and preservation protection of resources. 54 m s −1 during sea Jul 8, 2019 · Skysails GmbH is the market and technology leader in the field of automated towing kite systems. In even moderate winds, the first flights of an initial 160-square-meter towing kite propulsion system from the Hamburg-based manufacturer SkySails demonstrated how this innovative auxiliary propulsion system was able to substitute for 20% of the engine’s power. 9): • Jul 16, 2021 · The experienced Portuguese kitesurfer adapted a multi-hull boat that is able to sail the rough sea using a towing kite propulsion system. Together with the control pod and towing rope it forms what is called the “flying system. it forms what is called the “flying system. On the contrary, when the kite flies towards the wind window edge, its Nov 1, 2014 · It is clearly demonstrated that kite propulsion enables a significant upwind performance benefit which is even higher in downwind conditions. Starting and Landing of the kite is performed using special gears installed on/under deck of the yacht. Having successfully completed the basic research and engineering in 2005, the system’s towing kite area was scaled up to 160m2 and thoroughly tested on the 55m-long former buoy tender MS “Beaufort” in the years The SKS-Y-System comprises three main elements: A kite wing with its towing rope; A launch and recovery system; A control system for automatic operation; Instead of a traditional sail fitted to a mast, SkySails uses large towing kites to propel the yacht forward. All this system will offer you autonomy, safety and fuel economy. Jan 5, 2010 · Diederik Parlevliet, the Chief Executive Officer of Parlevliet & Van der Plas B. The towing kite is made of high-strength and weatherproof textiles. Dec 21, 2010 · The skysail engineering science incorporates the use of towing kites to make the vessel move forward rather than the traditional concept of sails or diesel or steam propulsion. system. 2). The towing kite is the heart of the SkySails propulsion system. May 12, 2016 · kite propulsion systems use large towing kites for. The use of the most modern materials, the optimal tuning of the components and the esay handling The newly developed WINGit Voyager Kite is the world's first series kite for propulsion of ships. Download scientific diagram | Skysails towing kite propulsion system from publication: Analysis on the Development of Wind-assisted Ship Propulsion Technology and Contribution to Emission Jun 30, 2023 · Now imagine the same concept applied to a 1,000-square-meter kite, flying 300 meters above the water – only instead of towing a surfer across the waves, it’s helping to propel a colossal cargo Feb 14, 2005 · The company claims almost every merchant and passenger vessel can be equipped or retrofitted with the SkySails system. It can be easily installed on new and existing vessels. Depending on the wind conditions, fuel costs can be lowered by between ten and 35 percent. By 2026 a 20 MW system is in planning, with the option to upgrade to 55 MW. Possible Courses [2] The power of the kite system can be reduced by changing its position into Oct 6, 2024 · Kite sails for yachts: harnessing wind propulsion for high speeds seafarers were reluctant to use the kite towing the ship. Although the towing kite has problems with deployment and recovery for the operation, systems are now designed to perform deployment and recovery automatically using the bow mast, and large towing force can be obtained because kite tu rn in a figure 8 motions and move at high speed acting as a wing. The towing kite is filled with compressed air to obtain optimally-shaped Fig. La propulsion vélique sera un élément clé des navires du futur. The kite can be used in winds of 12-74km/h (7-40 knots) and not just when the wind is blowing directly from behind the ship. View Show abstract La propulsion par le vent. The airborne towing kite is usually comprised of the below components (Fig. Together with the control pod and towing rope . It serves as an auxiliary and backup propulsion system to the traditional ship engines and adds up to 100 tons of traction. Jan 25, 2006 · The components of the SkySails system. KG Nov 20, 2007 · New Age Trawler/Motorsailer; Kite assisted PowerYacht. the propulsion of the ship. The automated kite powered by AirSeas is based on parafoil technology used to tow commercial ships. 7 tonne is achievable. Page 3 of 27 < Prev 1 Nov 29, 2021 · Forces acting on the towing kite; F L -Lift force, F t -Total force, F d -A drag force Slika 2. The 150-1000 m 2 kites (1,615-10,764 sq. Systems for vessels with an effective load of 32 tonnes are planned to be available in 2011. The towing kite is made from high Nov 3, 2008 · SkySails propulsion can save an average of 10 to 35% of the fuel costs on cargo ships, depending on wind conditions. Découvrez la propulsion par le vent The ship MV Beluga SkySails started its maiden voyage from the city of BremerhavenGermany to South & North America (and back) and the SkySails-System with its 1722 square-foot towing kite has been put into operation successfully. ) The MV Beluga SkySails is equipped with a towing kite measuring 160 square Jan 11, 2012 · SkySails, located in Hamburg, Germany, is the market leader in wind propulsion by automated towing kite systems. The system can be potentially retrofitted to any ship and SkySails estimates the potential market to be 60,000 ships over the period up to 2013. Aug 4, 2022 · Future e-fuels are expected to have less than 10% efficiency from renewable energy input to ship’s wake, as opposed to 100% for direct wind propulsion, and yet cost only 3-5x more than today’s fossil fuels, despite the massive infrastructure investment required to bring them to the market. According to the developers, a simple switch launches or recovers the kite which unfolds, operates, and refolds autonomously. The system consists of a towing kite, launch and recovery system, and automated control system. Their shape is comparable to that of a para-glider. 20. Dadd et al. Using a 300 m 2 kite, with 300 m long flying lines in 6. Similar to a paraglider the kite is steered by a control pod located underneath it. This innovative system consists of a large automated towing kite designed to significantly decrease ships’ operation costs. Nov 21, 2007 · In even moderate winds, the first flights of an initial 160-square-meter towing kite propulsion system from the Hamburg-based manufacturer SkySails demonstrated how this innovative auxiliary propulsion system was able to substitute for 20% of the engine’s power. Jan 22, 2023 · The kite flies 200 meters in the air to capture steadier, stronger winds. KITE The towing kite is the heart of the SkySails propulsion system. The study utilizes wind data collected SkySails started with the development of the world's first practicable towing kite propulsion system for commercial shipping in 2001. . 0 with 1 200 kW. SkySails kites fly at altitudes of up to 300 meters and can thus take advantage of the strong and constant high-altitude wind that is not reduced by Sep 9, 2009 · A 160 m2 SkySails propulsion system works to relieve the main engine of the "Theseus" the same way it does onboard the "Michael A. The towing force is transmitted to the ship by a high-strength synthetic fiber rope. The kite has a nominal power of up to 5,000 kW (about 6,800 HP), and is intended to lower fuel consumption rates by 10%-35% on average, and by up The full K1 produces electricity directly. " and "Theseus" of the Wessels Shipping Company. In this contribution the Ships copy the principle of kiteboarding The idea of using sails and kites is not totally new. Towing kites Towing kite boosting solutions provide thrust to a ship by means of lift generated by high altitude winds. 86 m s −1 instead of 1. SkySails is a new alternative propulsion system for ships. Then, all he has to do is press "on," and the giant kite will unfold from the bridge window and rise to the sky. Intended for boats measuring between 4 and 18 metres, this emergency propulsion system is made from high-tenacity polyester. Some 60,000 of the approximately 100,000 ships worldwide are suitable for being retrofitted with this kind of towing-kite propulsion system. Source: logipedia / Fraunhofer IML TUP GmbH & Co. The newly developed WINGit Voyager Kite is the world's first series kite for propulsion of ships. The MS Beluga SkySails is a heavy carrier that uses a towing kite system as part of its propulsion systems. Application of the towing kite propulsion system points to a sustainable way out of direct dependence on the oil price. Our kite systems makes it possible to power your boats with kites. Nov 4, 2016 · The Skysails propulsion system consists of three main components: a foil towing kite, a launch and recovery system, and an electronic control system for automated operation. 0 produces 360 kW and the system is upgrade-able to K1-20 V3. Their shape is comparable to that of a paraglide. The analysis of the distance elapsed within 961 s shows that, by kite propulsion, the upwind Vmg reached is 1. Dec 16, 2007 · The MV Beluga Skysails at christening. Instead of a traditional sail fitted to a mast, SkySails uses large towing kites for the propulsion of the ship. The use of the most modern materials, the optimal tuning of the components and the esay handling make the WINGit Voyager the ideal kite for use with our Kite The wind-assisted yacht propulsion system from SkySails uses the power of wind to tow yachts with kites. The towing kite is the core of the SkySails propulsion . “You have to have the courage to try out something new,” as Niels Stolberg, CEO of Beluga Shipping GmbH, comments the first application of the innovative SkySails towing kite propulsion system on a cargo vessel worldwide. INNOVATIVE TECHNOLOGY - The towing kite is the core of the SkySails propulsion system. A typical kite force polar is presented and a sensitivity study is carried out to identify the importance of various parameters in the ship kite propulsion system. a ship propulsion system matching platform based on the ship–engine–propeller matching SkySails is now offering a wind propulsion system based on large towing kites, which, for the first time, meets the requirements of shipping companies. Click to enlarge. The core of the propulsion system is the towing kite steered by the control pod situated under the kite. 1 and Fig. Additionally a launch and recovery system is installed aboard the ship [1]. kite systems are twice up to 5 times more efficient than any other wind propulsion system [5,6]. , one of the largest European fishing companies with headquarters in Katwijk in the Netherlands, and Stephan Wrage, the Managing Director of SkySails, signed a purchase agreement for the world’s first towing-kite wind propulsion system to be installed on a fishing trawler. V. A Towing Kite Instead of a traditional sail equipped with a mast, kite propulsion systems use large towing kites for the propulsion of the ship. 2. In contrast to a static flight Skysails Yacht is joining forces with Race for Water to develop its towing kite. of fossil fuel. 5% contribution to global greenhouse gas pollution Jan 1, 2014 · Kites may be used for power generation on land [24] and towing kites for ship propulsion have been suggested since the 1980s [25], [26]. Kites are more favourable on long international trades where larger ships tend to trade. The system can be recovered, but not launched at wind forces below 3 Beaufort. weatherproof textiles. " Final installation and commissioning of the towing-kite propulsion system on the "Theseus" were completed in early August at SkySails' manufacturing facilities in Wismar. 2 SkySails Towing Kite System The feasibility of kites as means for propulsion was tested in small scale on vari-ous boats and models between 2001 and 2006. Under the optimal wind conditions, fuel consumption can be halved. The SkySails propulsion system consists of an automatically controlled foil kite of some hundreds of square meters, an electronic control system for the kite, and an automatic system to retract the kite. In the case of a static flight, elevation optimization was conducted. prkfferbhlorrwgtaposlnpkocdymwmbtibfiamxgquehpdtpxwkaodssodkjuxmonxkyfnquir