RN 
MILLION 
-6.0 11 
s 
4 8 12 16 20 
SECTION ANGLE OF ATTACK 
=o 1 DEGREES 
-I- 
RN - 1.5 MILLION 
I I I 1- 
-.5 0 .5 I.0 1.5 
SECTION LIFT COEFFICIENT 
c.l 
figure 1.27. Effect of Reymafds Number on Section Ckacteristics of NACA 4412