NAVWEPS OO-ROT-RO  APPLICATION OF AERODYNAMICS  TO SPECIFIC PROBLEMS OF FLYING  VELOCITY DUE  TO FORWARD  FLIGHT  RETREATING GLADE  VELOCITY DUE  TO ROTATION  REVERSED FLOW  NEGATIVE STALL  NEGATIVE LIFT  VELOCITY DUE  I  -  POSITIVE  STALL ANGLE  LOCAL  I/  BLADE  ANGLE  OD-  nrc7  I  OF  HUB  ATTACK  ETRiATING  BLADE  -lop  I  _- -  -  NEGATIVE STALL ANGLE  ,  -ADVANCING  BLADE  Figure 6.16. Rotor Flow Conditions in Forward f/i&  403 