The design report

Figure 3.1.402 showing values of Cl at different angles of attack.
Figure 3.1.403 showing cl/cd characteristics along with moment coefficients for different angles of attack
From the graphs and tables above, NACA 4415 and Wortman FX 77-153 suited the best
for our purpose. Wortman FX 77-153 showed better lift coefficient characteristics at
higher angles of attack and moment coefficient values. But this was compromised with
higher values of drag. NACA 4415 had better L/D characteristics.
Hence, to achieve the best outcome, NACA 4415 with an angle of incidence of 2 degrees
was selected. The angle of incidence gave us higher values of lift coefficients at small
angles of attack. Compromises on stall characteristics had to be made in order to
achieve this.