The Warner Sportster is an American light-sport aircraft, designed and produced by Warner Aerocraft of Seminole, Florida. The aircraft is only supplied as a complete ready-to-fly-aircraft.
The Sportster was designed by Jesse Anglin of Henderson, North Carolina. It was derived from his earlier design, the Warner Spacewalker II, to comply with the US light-sport aircraft rules. It features a cantilever low-wing, a single-seat or a two-seats-in-tandem open cockpit which can be optionally enclosed under a bubble canopy, fixed conventional landing gear and a single engine in tractor configuration.
The aircraft fuselage is made from welded steel tubing, with its wooden wings covered in doped aircraft fabric. Its span wing has an area of . The standard engine available is the Continental O-200 four-stroke powerplant. The Lycoming O-290 has also been used.
As of March 2017, the design does not appear on the Federal Aviation Administration's list of approved special light-sport aircraft.
By March 2017 five examples had been registered in the United States with the Federal Aviation Administration, all in the experimental category.