It was not enough to have sufficient lift; unless it was properly distributed, the ship would break her back.
Conventional aircraft accelerate along the ground until sufficient lift is generated for takeoff, and reverse the process to land.
The flapping machines that he designed were either too small to generate sufficient lift, or too heavy for a human being to operate.
I started the engines and reported to the pilot that subject to sufficient lift he could fly back to base.
The heavier the plane, the more runway it needs to reach speeds high enough to achieve sufficient lift for takeoff.
Below that speed it is impossible to generate sufficient lift to overload the weak link.
When flying upside down a high angle of attack will allow sufficient lift to fly.
Aircraft also depend on high power-to-weight ratio to achieve sufficient lift.
Once airborne and at a speed where sufficient lift was generated by the wing alone, the deflection could be removed.
If the speed is high enough air flowing over the car's overall airfoil shape will create sufficient lift to force the car to become airborne.