Designed to be used with the WinDynamo III or WinDynamo II, the Blade Engineering Pack enables students to design, measure, cut, and shape their blades from balsa wood. Their completed blades can be tested at various pitch angles on the WinDynamo II or III. Requires glue, hobby knife, sandpaper, Phillips screwdriver, ruler, ballpoint pen, and WinDynamo III Wind Generator, sold separately.