Final answer:
The powered crossflow and gravity crossflow must be parallel for takeoff. This alignment is important for takeoff because it ensures that the forces acting on the aircraft are balanced and allow it to lift off the ground.
Step-by-step explanation:
The powered crossflow and gravity crossflow must be parallel for takeoff.
When we say that two lines are parallel, it means that they are always at the same distance from each other and they never intersect.
In this case, both the powered crossflow and gravity crossflow are parallel to each other, which means they are aligned in the same direction and do not intersect.
This alignment is important for takeoff because it ensures that the forces acting on the aircraft are balanced and allow it to lift off the ground.