NAVWEPS OO-80T-80 
STABILITY AND CONTROL 
HELIX ANGLE OF ROLL 
IP VELOCITY,$ 
RCUING VELOCITY, P 
TIP VELOCITY WE TO ROLL 
RESULTANT PATH 
( RADIANS 1 
DAMPING IN ROLL 
STARBOARD WING 
AIRPLANE RESPONSE TO AILERON DEFLECTION 
PIRPLANE RESTRAINED 
TO ROLLING MOTION ONLY 
------(A) HIGH DlRECTlCNAL STABILITY 
m DIHEDRAL EFFECT 
AIRPLANE UNRESTRAINED 
\ AND FREE TO SIDESLIP 
\ (RUDDER FIXED) ( B ) LOW DIRECTIONAL STABIUTY 
.---A HIGH MHEDRAL EFFECT 
w TIME, SECONDS 
Figure 4.29. Rolling Performance 
302