Conclusion and Recommendations (cont’d)
S-shaped airfoils with higher lift coefficients have smaller stability range or they are completely unstable.
When the thickness increased the lift coefficient of the s-shaped airfoils decreases and their stability range increases.
But for some c1-R1 pairs, the increase in the thickness yields increase in both lift coeffient and the stability range.
Lift coefficient of s-shaped airfoils are small as compared to NACA airfoils.
S-shaped airfoils can provide statically stable flight.
If the advantage gained by tail volume reduction overcomes the lost in the lift, s-shaped airfoils can be used in WIG vehicles.