Bachelor thesis department of automotive and aeronautical. The idea behind the winglet is to reduce the strength of the tip vortex and therefore cause the flow across the wing to be more twodimensional. The optimization studies reveal that the ld of the optimum design is 12%. Nasa photo ec7911481 winglets are vertical extensions of wingtips that improve an aircrafts. Why the airbus a380 does not have winglets similar to the. He is a widely published author known throughout the world as one of the leading aerodynamicists, especially in the areas of airfoil and winglet design and analysis, wing optimization, natural laminar flow aerodynamics, and subsonic. Closeup of winglet on kc5 test aircraft, with attached tufts displaying flow of air over winglet surface. Maughmer, an associate professor of aerospace engineering, about designing winglets to improve performance on his 15meter wingspan racing sailplane. The popularity of winglets, though, continues to grow. Maughmer honored with distinguished alumnus award may 31, 2019 debra levey larson as a senior in 1972 at the university of illinois in the department of aerospace engineering, mark maughmer was forced to make a choice. Buttressed by his academic research, maughmer s design work with sailplane racing pilot peter masak in the late 1980s and early 1990s literally revolutionized the shape of gliders by making winglets standard equipment. Problem induced drag produced by 3 d airflow around wing tips. Nasa photo ec7911481 winglets are one of the most successful examples of a nasa aeronautical innovation being utilized around the world on all types of aircraft.
Yankee composites offers winglet retrofitting and winglet kits for selected sailplane models. In 1987, mechanical engineer peter masak called on aerodynamicist mark d. They may have benefits for non turboprop planes as well but i know on the tradewinds the winglets tend to be a common place for cracking where they connect to the tip tank. Blended winglets were invented after burt rutan exited the homebuilt aircraft business. Multidisciplinary design and optimization for high speed. By increasing the wingspan, it also increases wing efficiency. In 1987, peter masak called on maughmer about designing winglets for his sailplane to improve performance. Flight tests at the nasa dryden flight research center have found a 6. Winglets book series 4 books all formats kindle edition from book 1. Some aircraft are designed and manufactured with sleek upturned winglets that blend smoothly into the outer wing sections. Maughmer over the past ten years, from initially being able to do little to improve overall sailplane performance, winglets have developed to such an extent that few gliders leave the factories without them. Sixclaws is a happy and industrious sandwing, always working hard and loyally for his queen.
Five different winglet configurations were wind tunnel tested in may, 2014, by austin vorisek, a graduate of solon high school, who will be attending ohio state university in the fall of 2014, and alex mann, a graduate of orange high school, who will be attending akron univerity. A comparative study between winglet and raked wingtip. Others had attempted to apply whitcombs winglets to gliders before, and they did improve climb performance, but this did not offset the. Department of aerospace engineering, pennsylvania state university, university park, pennsylvania. Lift, drag and moment of a naca 0015airfoil to measure the flow characteristics the wind tunnel was operated at a nominal 17 ms during the coefficient. High pressure on the lower surface creates a natural airflow that makes its way to the wingtip and curls upward around it. Citeseerx document details isaac councill, lee giles, pradeep teregowda.
Design of winglets for highperformance sailplanes journal. Design and analysis of spiroid winglet open access journals. Understanding the benefits of blended winglets requires knowledge of the following. Comparisons of theoretical methods for predicting airfoil. So when the youngest sandwing princess, blaze, wanders off during a sandstorm, sixclaws doesnt think twice before trying to rescue her. Aerodynamic analysis of blended winglet for low speed. Maughmer, an associate professor of aerospace engineering at the pennsylvania state university, about designing winglets to improve performance on his 15meter 49 ft wingspan racing sailplane. Its construction was undertaken in order to meet the longfelt necessity for a means of producing metal wings for wind tunnel tests which would be accurate and fair, and yet within a price commensurate with the value of a model wing test. Design and testing of a winglet airfoil for lowspeed aircraft. Pdf design and testing of a winglet airfoil for lowspeed aircraft. They are now a familiar sight to nearly every soaring pilot. Maughmer born january 18, 1950 is a professor of aerospace engineering in the. Aerodynamic analysis of blended winglet for low speed aircraft.
As understanding was gained, improved methods were developed, which ultimately resulted a. Multidisciplinary design and optimization for high speed, high. Design of parametric winglets and wing tip devices. A short, almost vertical stabilizing fin projecting from the tip of an aircraft wing. Borrow ebooks, audiobooks, and videos from thousands of public libraries worldwide. Winglet technology, llc, a wichita kansas based company, designs, certifies and markets the most innovative winglets in the world. Maughmer the pennsylvania state university university park, pennsylvania 16802 abstract although theoretical tools for the design of winglets for highperformance sailplanes were initially. Numerical analysis of winglets on wind turbine blades.
Sutherland essay question on our facebook page where fellow bookworms are always glad to help. The air pressure on the bottom of a wing is greater than the pressure on top, so when air. Theyre called winglets, and their purpose is to reduce turbulence at the tips of an airplanes wings. Maughmer, the pennsylvania state university university park, pennsylvania 16802 5an experimental study on wingtip devices for agricultural aircraft,rogerio f. Others had attempted to apply whitcombs winglets to gliders before, and they. Kunz the pennsylvania state university, university park, pennsylvania presented at the xxv ostiv congress, saint auban, france summary although the accuracy of methods for the design and analysis of winglets has been limited, the performance gains achieved through their use are now well established. This conjunction of air at the tip forms a vortex that trails behind the aircraft and creates drag. Winglets also are available for retrofit on inservice airplanes. Winglets 4 book series essay and need some advice, post your tui t. The design and testing of a winglet airfoil for lowspeed aircraft. Maughmer born january 18, 1950 is a professor of aerospace engineering in the department of aerospace engineering at the pennsylvania state university.
Typically the winglets are installed on the tradewinds bonanza to stabilize the flight at higher altitudes. Clark maughmer m, 75 kingston, oh background report at. The mass of one winglets is limited to 0,28 0,04 kg 0. Increasing the wing by 45 of the height of winglets will have the same effect as having a winglet. The pennsylvania state university, university park, pennsylvania 16802. Multidisciplinary design and optimization for high speed, high efficiency tiltrotors with wing extensions and winglets sandilya kambampati, edward smith, mark maughmer, taylor hoover, penn state may 17, 2016. Few builders have experimented with blended winglets because it requires structural and aerodynamic changes to the wing. The wing cutting equipment about to be described was designed and built by mr. For more information on winglets, we refer to the following articles. Winglets definition of winglets by the free dictionary. Sutherland born july 31, 1978 in caracas, venezuela is a venezuelanamerican childrens book author who has also written under the pen name heather williams.
In brief, winglets reduce the drag produced by the confluence of the airflow on the upper and lower surface of the wing where they meet the tip. Fans of the new york times bestselling wings of shelve deserter. Although theoretical tools for the design of winglets for lowspeed aircraft were initially of limited value, simple methods were used to design winglets that gradually became accepted as benefiting overall aircraft performance. Clark maughmer is 75 years old and was born on 04231945. The goal of this project is to measure the effects on flight performance when winglets are added to a paper airplane design. Winglets reduce wingtip vortices, the twin tornados formed by the difference between the pressure on the upper surface of an airplanes wing and that on the lower surface. The big manufacturers explored offering winglet retrofit kits to their customers but at the time, it wasnt economical since fuel was so cheap. Select from a variety of bestselling titles to enhance your guided reading program. Citeseerx the design of winglets for lowspeed aircraft. Yes, winglets reduce wing tip vortices and therefore induced drag. Problem induced drag produced by 3d airflow around wing tips.
Fans of the new york times bestselling wings of fire series wont want to miss this allnew story set in the dangerous world of dragons. In the short story winglets series, fans will meet old friends and new enemies, uncover shocking secrets, and learn more about the terrible challenges that will test all dragonkind. Although theoretical tools for the design of winglets for. Maughmer has made himself known in the aviation world for his contribution to winglets on sailplanes 57. Page asw 27 alexander schleicher technical note no. The results of mark maughmers high school aptitude test dictated he should be an artist, but his. Winglets, in all forms and shapes, have become a standard feature in sailplane design. The penn state professor is only half kidding when he pulls the book from a pile on his desk. Pdf numerical analysis of winglets on wind turbine blades. He is also exploring methods for the design and analysis of planar and nonplanar wing geometries, as well as winglets, for achieving minimum overall drag. Maughmer news newspapers books scholar jstor may 2019 learn how and when. American institute of aeronautics and astronautics 12700 sunrise valley drive, suite 200 reston, va 201915807 703.
Maughmer, published june 2002 soaring magazine view pdf the design of winglets for lowspeed aircraft by mark d. Kambampati, taylor hoover, edward smith, mark david maughmer aerospace engineering. Addon winglets are also custom made for many types of aircraft. Winglets were wind tunnel tested and computer analyzed by richard whitcomb of the nasa langley research center in the mid 1970s. As a result, a large part of winglet design development still involves timeconsuming wind tunnel and flight test trials, unless a firm has access to specialized aerodynamic computer software. Winglets makes the passage of air from the bottom of the wing to the lower pressure top of the wing more difficult, thus reducing induced drag. Boeing chose to increase the span of the wing rather than add winglets. A wing structural model for strength and wing weight predictions. Winglets closeup of winglet on kc5 test aircraft, with attached tufts displaying flow of air over winglet surface. Fans of the new york times bestselling wings of fire series wont want to miss this allnew story set in the dangerous a. May 22, 2012 american institute of aeronautics and astronautics 12700 sunrise valley drive, suite 200 reston, va 201915807 703. A freewake vortex analysis method was used by maniaci and maughmer 2012 for the design of rather large downstreamfacing winglets with a height of 8% of the rotor radius. Winglets are strong enough for slips to final and increase the safety as the glider is less likely to spin with the winglets, especially earlier generation models like the asw20 and ventus.
Winglets wont work with some airfoils, and theyre only marginally effective on others. Mark palmer adelaide, south australia, australia level. Winglets are one of the most successful examples of a nasa aeronautical innovation being utilized around the world on all types of aircraft. What do winglets do to increase aircraft performance. European jet maker airbus is waging a legal battle against a longtime ally of boeing over the curved wingtip attachments that airlines are increasingly demanding as a way to save fuel. The 8ft, carbon graphite winglets allow an airplane to extend its range, carry as much as 6,000 lb more payload from takeofflimited airports, and save on fuel.
Each story is available exclusively in ebook and is the perfect read for wings of fire fans who just cant wait for. Operational reynolds number range of winglet airfoil and range of windtunnel tests. One person that did was the late jack morrison, who added blended winglets to his beautiful eracer and then claimed a 10 knot speed. Xxxiii ostiv congress congress program and proceedings. Our patented elliptical winglet provides industrybest performance. Sutherland, author of the bestselling currently reading. Other names that clark uses includes clark m maughmer and clark m maughner. In a study in 1987 by mark maughmer in collaboration with peter masak on winglet. Winglets had been tried before on gliders but without success, and the common.
For many years, and in many text books, you may have read. Sutherland is the author of several books for young readers, including the menagerie trilogy, the pet trouble series, and three books in the bestselling seekers series as part of the erin hunter team. Home multidisciplinary design and optimization for high speed, high efficiency tiltrotors with wing extensions and winglets. A winglet is a canted extension to the wingtip that diffuses the swirl of air around it with the goal of reducing overall drag. Five dragonets are raised in a hidden cave and enlisted, against their will, to end a terrible war between the dragon tribes. The change in mass for the new winglets are so small and so close to the in flight c. Large for highlift, low speed flight conditions 50% of total drag for subsonic transports opperating at high subsonic speeds. Winglets synonyms, winglets pronunciation, winglets translation, english dictionary definition of winglets. His winglet designs are on hundreds of production sailplanes.
May 05, 2015 the winglets were attached to a 172 scale model of a cessna 172. Maughmer is involved in the design, analysis, and windtunnel testing of airfoils. In 1987, mechanical engineer peter masak called on mark d. Our guided reading 6book sets help you tailor your instruction to meet individual and smallgroup interests and needs. Fans of the new york times bestselling wings of fire series wont want to miss this allnew story set in the dangerous and thrilling world of dragons. The design of winglets for lowspeed aircraft mark d.
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