A superior teaching aid - Incorporating new opportunities for student experiments in aerodynamic electricity transfer. The generator blade assembly consists of 6 vanes, 37 cm in diameter, with a total sail area of 77 cm2. This is connected to a DC generator and 1.5 volt bulb to indicate electrical output. Other features include a full cover for outdoor use, a weighted base, a structural aluminum tower, and a wind-seeking, balanced tail assembly. The unit measures 48 cm, and may be used outside, or inside with an air supply. Comes complete with instruction sheets and manual.