Embraer 175 - Takeoff Safety Speed; Minimum Unstick Speed; Lift-Off Speed; Maximum Tire Speed

AIRPLANE
FLIGHT
MANUAL
PERFORMANCE
CTA APPROVED 5-01
REVISION 2 code 01 Page 9
AFM
-
1385
OPTIMUM V
1
It is the V
1
speed that assures the greatest V
1
dependent takeoff
weight.
ROTATION SPEED - V
R
It is the speed at which the pilot starts to rotate the airplane during the
takeoff ground run.
TAKEOFF SAFETY SPEED - V
2
It is the target speed to be attained at 35 ft height above runway
surface, the critical engine having failed at V
EF
.
MINIMUM UNSTICK SPEED - V
MU
It is the minimum speed at which the airplane can safely lift-off the
gr
ound, and continue takeoff without displaying any hazard to the
airplane.
LIFT-OFF SPEED - V
LOF
It is the speed at which the airplane first becomes airborne during
takeoff.
MAXIMUM TIRE SPEED
It is the maximum ground speed for which the tires are certified.
STALL SPEED - V
S
It is the minimum steady flight speed at which the airplane is
controllable.
FLAP RETRACTION SPEED - V
FR
It is the speed at which the takeoff flaps retraction should be initiated
during the acceleration segment in case of an engine failure takeoff.
FINAL SEGMENT SPEED - V
FS
It is the speed to be achieved at the end of the acceleration segment
and start of the final segment of the takeoff flight path, with one engine
inoperative, landing gear retracted, and flaps retracted.