NAVWEPS DD-BOT-80 
BASIC AERODYNAMICS 
CAMBERED AIRFOIL 
UPPER DEVELOPING POSITIVE 
LIFT 
NET 
LIFT 
LOWER SURFACE LIFT 
SYMMETRICAL AIRFOIL 
AT ZERO LIFT CAMBERED AIRFOIL 
AT ZERO LIFT 
UPPER SURFACE 
LOWER SURFACE 
LIFT 
SYMMETRICAL AIRFOIL 
AT POSITIVE LIFT 
UPPER SURFACE LIFT 
LOWER SURFACE LIFT 
t 
CHANGE IN LIFT 
+ 
O.C. 
A- UPPER SURFACE 
FLOWER SURFACE LIFT 
CAMBERED AIRFOIL 
AT POSITIVE LIFT 
A- UPPER SURFACE LIFT 
LOWER SURFACE LIFT 
k- 
CHANGE IN LIFT 
c 
+ 
PITCHING MOMENT 
0.e. 
Figure 1.27. Development of Pitching Moments 
48