 Typically, about 60 percent of participating teams submit at least one qualification score.The teams with the top 100 qualifying scores submitted in April compete in the National Fly-off that is held during May at Great Meadow in The Plains, Virginia.TARC challenges students to design, build and launch rockets that can safely carry one, two, or three raw hen eggs (depending on the year's challenge) and consistently come very close to a specified flight altitude and duration.