ADVERSE YAW DUE TO ROLL 
FORCE FORWARD 
DOWNGOING 
PORT WING 
,IRPLANE.IN ROLL TO LEFT 
NAVWEPS 00-8OT-30 
STABILITY AND CONTROL 
\FOR SAKE OF CLARITY. / 
SLIPSTREAM SWIRL ON THE PROPFLLER POWERED AIRPLANE 
YAWING MOMENT COEFFICIENT 
FROM ASYMMETRICAL / 
THRUST 
YAWING MOMENT DUE TO ASYMMETRICAL THRUST 
I 
I 
w 
EQUIVALENT AIRSPEED, KNOTS 
Figure 4.26. Requirements for Directional Control 
293