NAVWEPS OeBOT-80  BASIC AERODYNAMICS  DOWNWASH FLOW FIELD BEHIND A RECTANGULAR  WING ILLUSTRATED BY TUFT-GRID PHOTOGRAPHS  AR=2.31,  k=l.O  -II-  30° OF FLOW ANGULARITY  OT  (DEG)  0  ‘ 8  -  16  STALL  18  (a) TUFT GRID 6 INCHES FROM  (b) TUFT GRID 24  TRAILING EDGE  TRAILING EDGE  FROM NACA TN 2674  F;gure 1.33. Stall Patterns (sheet 2 of 8)  79 