The Flight Design CT series is a family of high-wing, tricycle undercarriage, two seat, ultralight and light-sport aircraft produced by Flight Design of Germany. The family includes the original CT and the CT2K, CTSW, CTLS and the MC models.

Ultralight aviation is the flying of lightweight, 1- or 2-seat fixed-wing aircraft. Some countries differentiate between weight-shift control and conventional three-axis control aircraft with ailerons, elevator and rudder, calling the former "microlight" and the latter "ultralight".