Design and testing of a winglet airfoil for lowspeed aircraft. Mark palmer adelaide, south australia, australia level. 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. Although theoretical tools for the design of winglets for. 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. Five dragonets are raised in a hidden cave and enlisted, against their will, to end a terrible war between the dragon tribes. The goal of this project is to measure the effects on flight performance when winglets are added to a paper airplane design.
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. The air pressure on the bottom of a wing is greater than the pressure on top, so when air. Problem induced drag produced by 3d airflow around wing tips. Winglets book series 4 books all formats kindle edition from book 1. Im very pleased with the new cosmetics even at the price i paid. Clark maughmer is 75 years old and was born on 04231945. Borrow ebooks, audiobooks, and videos from thousands of public libraries worldwide. Theyre called winglets, and their purpose is to reduce turbulence at the tips of an airplanes wings. Winglets also improve landings by reducing the tendency of the king air to drop out in the flair. Maughmer, an associate professor of aerospace engineering, about designing winglets to improve performance on his 15meter wingspan racing sailplane. In 1987, mechanical engineer peter masak called on aerodynamicist mark d.
Winglets closeup of winglet on kc5 test aircraft, with attached tufts displaying flow of air over winglet surface. Find all the books, read about the author, and more. 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. As understanding was gained, improved methods were developed, which ultimately resulted a. Winglets, in all forms and shapes, have become a standard feature in sailplane design. One person that did was the late jack morrison, who added blended winglets to his beautiful eracer and then claimed a 10 knot speed. Probably most cited when it comes to winglets is nasatnd. 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. Others had attempted to apply whitcombs winglets to gliders before, and they. Sutherland essay question on our facebook page where fellow bookworms are always glad to help. Maughmer born january 18, 1950 is a professor of aerospace engineering in the. Maughmer is involved in the design, analysis, and windtunnel testing of airfoils. The design and testing of a winglet airfoil for lowspeed aircraft. Kambampati, taylor hoover, edward smith, mark david maughmer aerospace engineering.
Over the past ten years, from initially being able to do little to improve overall sailplane performance, winglets have developed to such an. Maughmer, the pennsylvania state university university park, pennsylvania 16802 5an experimental study on wingtip devices for agricultural aircraft,rogerio f. By increasing the wingspan, it also increases wing efficiency. Winglets, is only a tiny 32 pages long and only about three chapters. 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. Increasing the wing by 45 of the height of winglets will have the same effect as having a winglet. 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. Yes, winglets reduce wing tip vortices and therefore induced drag. 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. Blended winglets were invented after burt rutan exited the homebuilt aircraft business. Problem induced drag produced by 3 d airflow around wing tips.
Multidisciplinary design and optimization for high speed. Pdf design and testing of a winglet airfoil for lowspeed aircraft. 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. The optimization studies reveal that the ld of the optimum design is 12%. Each story is available exclusively in ebook and is the perfect read for wings of fire fans who just cant wait for. Large for highlift, low speed flight conditions 50% of total drag for subsonic transports opperating at high subsonic speeds. Maughmer view pdf the design of winglets for high performance sailplanes. Sutherland, author of the bestselling currently reading. In 1987, mechanical engineer peter masak called on mark d. Winglets greatly reduce drag due to lift wake turbulence formation. The popularity of winglets, though, continues to grow.
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. Sutherland, 97838126198, available at book depository with free delivery worldwide. Flight tests at the nasa dryden flight research center have found a 6. A short, almost vertical stabilizing fin projecting from the tip of an aircraft wing. Pennsylvania state university, university park, pennsylvania.
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. Instead of the usual 300page package were so used to, prisoners, the first book in a side series called wings of fire. Winglets were wind tunnel tested and computer analyzed by richard whitcomb of the nasa langley research center in the mid 1970s. In a study in 1987 by mark maughmer in collaboration with peter masak on winglet. A wing structural model for strength and wing weight predictions. American institute of aeronautics and astronautics 12700 sunrise valley drive, suite 200 reston, va 201915807 703. Boeing chose to increase the span of the wing rather than add winglets. The penn state professor is only half kidding when he pulls the book from a pile on his desk. Maughmer born january 18, 1950 is a professor of aerospace engineering in the department of aerospace engineering at the pennsylvania state university. Understanding the benefits of blended winglets requires knowledge of the following. While winglets do not directly create additional lift, they block the downforces created. Why the airbus a380 does not have winglets similar to the.
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. For more information on winglets, we refer to the following articles. Others had attempted to apply whitcombs winglets to gliders before, and they did improve climb performance, but this did not offset the. Design of parametric winglets and wing tip devices. 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. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Fans of the new york times bestselling wings of shelve deserter. Design of winglets for highperformance sailplanes journal of. So when the youngest sandwing princess, blaze, wanders off during a sandstorm, sixclaws doesnt think twice before trying to rescue her. Winglets had been tried before on gliders but without success, and the common wisdom was that. Winglets 4 book series essay and need some advice, post your tui t.
Our guided reading 6book sets help you tailor your instruction to meet individual and smallgroup interests and needs. A comparative study between winglet and raked wingtip. Winglets synonyms, winglets pronunciation, winglets translation, english dictionary definition of winglets. Aerodynamic analysis of blended winglet for low speed aircraft. The winglets were expensive but they did improve the overall look of my craft. Winglet liftcoefficient operating range compared to that of the wing for a typical highperformance. Blended winglets were first introduced on the mcdonnel douglas md11 aircraft in 1990 with launch customer finnair it also features a smaller winglet at the bottom side of the wing. The design of winglets for lowspeed aircraft mark d. The change in mass for the new winglets are so small and so close to the in flight c.
Design and analysis of spiroid winglet open access journals. Sixclaws is a happy and industrious sandwing, always working hard and loyally for his queen. The tail is much higher on the new gear which should make it more difficult for me to strike the tr. Definition and discussion of the intrinsic efficiency of winglets. Maughmer, published june 2002 soaring magazine view pdf the design of winglets for lowspeed aircraft by mark d. The results of mark maughmers high school aptitude test dictated he should be an artist, but his.
Winglets definition of winglets by the free dictionary. Operational reynolds number range of winglet airfoil and range of windtunnel tests. A winglet is a canted extension to the wingtip that diffuses the swirl of air around it with the goal of reducing overall drag. Maughmer has made himself known in the aviation world for his contribution to winglets on sailplanes 57.
At first, fans of the wings of fire series might find this ebook a bit underwhelming. Page asw 27 alexander schleicher technical note no. They are now a familiar sight to nearly every soaring pilot. Clark maughmer m, 75 kingston, oh background report at. Winglets also are available for retrofit on inservice airplanes. Sailplane winglet design maughmer technical soaring. Among the many aircraft design textbooks it seems that only. Other names that clark uses includes clark m maughmer and clark m maughner. 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.
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. Mark maughmer, peter kunz abstract 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. 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. 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. Home multidisciplinary design and optimization for high speed, high efficiency tiltrotors with wing extensions and winglets. Maughmer news newspapers books scholar jstor may 2019 learn how and when. Few builders have experimented with blended winglets because it requires structural and aerodynamic changes to the wing.