Computational Analysis of Pitch Stability for a Slotted Airfoil in Ground Effect

Planform Characterization of a High Lift, Low Speed, Ground Effect Glider

“…This action limits the movement of the center-of-pressure by reducing the lift capabilities of the airfoil at higher angles of attack. A slot that is located a distance, x, at 20% of the chord length from the leading edge, with a width, w, that is 2% of the chord length and at an angle, d, that is 40 degrees from the vertical was found to have the greatest impact on reducing the movement of the center of pressure across a range of angles of attack from -3 to 15 degrees (46). The Reynolds number for this research was 1.23 x 10 6 .…”

“…This result led to research on a method that would restrict the movement of the center-ofpressure (46) (47). By creating airfoils that had an angled slot cut into the main body as shown in Figure 30, the path of the air around the airfoil could be changed as the angle of attack increased.…”