Although the takeoff and climb is one continuous
maneuver, it will be divided into three separate steps
for purposes of explanation: (1) the takeoff roll, (2) the
lift-off, and (3) the initial climb after becoming airborne.
Takeoff Roll (ground roll)—the portion of the
takeoff procedure during which the airplane is
accelerated from a standstill to an airspeed that
provides sufficient lift for it to become airborne.
Lift-off (rotation)—the act of becoming airborne as a result of the wings lifting the airplane
off the ground or the pilot rotating the nose up,
increasing the angle of attack to start a climb.
Initial Climb—begins when the airplane leaves
the ground and a pitch attitude has been established to climb away from the takeoff area.
Normally, it is considered complete when the
plane has reached a safe maneuvering altitude,
or an en route climb has been established.