NAVWEPS DD-ROT-80 
BASIC AERODYNAMICS 
BOUND OR :INE VORTEX 
, OR TIP VORTEX 
DEFLECTED AIRSTREAM 
(UPW 
BOUND VORTEX ONLY 
VERTICAL VELOCITIES 
IN THE VICINITY OF 
THE WING 
COUPLED BOUND AND 
AVERAGE RELATIVE WIND TIP VORTICES 
V t 
REMOTE FREE STREAM 
AT WING A.C. 
DOWNWASH 
ANGLE 
D it INDUCED DRAG 
EFFECTIVE 
LIFT- 
REMOTE FREE STREAM 
Figure 1.30. Wing Vortex System and Induced Flow 
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