http://www.radiocarbonart.com/tsmc2/ This is a short preview from my advanced r/c thermal soaring instructional video: The Thermal Soaring Master Class #2. In this short clip Paul talks about reading sustained wind shifts and how terrain and sun angle make consistent areas of lift that you can use to make high percentage air calls before launch.
http://www.radiocarbonart.com/tsmc2/
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Radio Carbon Art produces professional radio-controlled soaring instructional and training programs that will help you quickly become competent in building, preparing, tuning and flying today's rc gliders and sailplanes.