Originally Posted by CONF iture
No need for acceleration, sufficient thrust alone will do.
Some basic aerodynamics and flight mechanics: Changing the direction of the flightpath upwards requires that the lift force plus the vertical component of thrust is greater than the weight. The only way to increase lift at alpha-max is to increase airspeed. At alpha-max of 17.5 degrees roughly 30% of the gross thrust force contributes to the lift, while 95% contributes to acceleration. So yes, increasing thrust sufficiently to cause the airplane to accelerate will change the flight path upwards.