PDF-(EBOOK)-Spinning Flight: Dynamics of Frisbees, Boomerangs, Samaras, and Skipping Stones

More frisbees are sold each year than baseballs basketballs and footballs combined Yet these familiar flying objects have subtle and clever aerodynamic and gyrodynamic properties which are only recently being documented by wind tunnel and other studies In common with other rotating bodies discussed in this readily accessible book they are typically not treated in textbooks of aeronautics and the literature is scattered in a variety of places This book develops the theme of discwings and spinning aerospace vehicles in parallel Since many of the examples are recreational anyone who enjoys these activities will likely find it profitable and enjoyable In addition to spinning objects of various shapes several exotic manned aircraft with disc planforms have been proposed and a prototypes built these include a Nazi secret weapon and the De Havilland Avrocar also discussed in the book Boomerangs represent another category of spinning aerodynamic body whose behavior can only be understood by coupling aerodynamics with gyrodynamics The narrative supported by equations and graphs explains how the shape and throw of a boomerang relates to its trajectory The natural world presents still other examples namely the samaras or seedwings of many tree species which autorotate during their descent like a helicopter whose engine has failed The flight performance of these spinning wings directly affects the dispersal and thus the evolutionary competitiveness of the trees concerned Samaratype configurations are also considered for instrumentation and other payload dispersal applications In short the book discusses a range of familiar connected but largely undeveloped topics in an accessible but complete mannerFrom the reviews of the first editionIn his fascinating book Spinning Flight Ralph Lorenz provides a rich feast of examples of spinning bodies The book is well organized The discussion in the book should be accessible to readers with some elementary understanding of aerodynamic principles For the expert the book is full of open problems Its scope is extensive In this respect there may be something for everyone within its attractively designed cover H K Moffatt Nature Vol 444 December 2006If you liked physics at school then this book is for you It concerns itself with flying objects that spin through the air and even tells you how to impress your friends with the biomechanics of Frisbees there is plenty of information at all levels and the book has a wealth of detail that only an aerospace engineer like Lorenz could have come up with Len Fisher BBC Focus February 2007. - 1 - TOOLKIT - 2 - Contents The History Of Skipping 3 The Benefits of Skipping 6 Types of Skipping 7 Aims and Objectives of Project 9 Establishing a Project 10 Partnership Working 13 Marketing and P Australian. boomerang. 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