![]() He cannot be sure that he will succeed and surpass the models already on the market. ![]() That means that the manufacturer of very expensive newly developed aircraft models is saddled with a very high risk. A significant increase in glide ratio and reduction in minimum sink is not guaranteed even in brand new machines. The current situation is characterized by the fact that the performance of modern gliders has become very similar. The papers by the director and his colleagues, that mostly had to do with aerodynamics and new airfoils, were particularly interesting. ![]() The main considerations were new materials and their methods of use and also questions of performance increases in the future. At the symposium on aerodynamics and glider manufacture at the DLR in Stuttgart there were extensive theoretical opinions presented about the future of Sailplane manufacture.
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