H2.

2. Consider modeling the tip vortices that form behind a wing using two vortex laments of equal strength F, but opposite orientation such that a point between the vortices experiences a downward velocity. Assume that the distance between the two vortices is equal to the span of the wing? 5. Finally, assume that the aircraft is sufciently far away that the laments can be modeled as innitely long and straight. (a) How do the vortices interact? That is, how do they move as time progresses? Give your answer in terms of a velocity and a direction. (b) Now suppose the vortices are very close to the ground. How do they move? You can answer this question qualitatively: no velocity value is necessary, just a description of the movement