PERFORMANCE OF S-CAMBERED PROFILES WITH CUTOFF TRAILING EDGES

The aerodynamic characteristics of an S-cambered profile are studied u nder forward and reversed flow conditions. The profile chord is cut by 3, 6, and 9 percent of the chord at the sharp trailing edge end and t he performances of these profiles are compared. It is found that with increase in length of cutting the lift coefficient increases in forwar d direction and decreases in reverse direction of flow. Cutting off th e sharp trailing edge improves the lift-drag characteristics in forwar d mode and deteriorates in the reverse mode.