The Keleher JK-1 Lark was a single-seat aerobatic sport aircraft designed in the United States in the early 1960s and later marketed for homebuilding. It was a conventional mid-wing strut-braced monoplane with fixed tailwheel undercarriage. The fuselage and empennage were of welded steel tube construction skinned in fabric. The wings were wooden and also covered in fabric. The design was revised in 1963 with the new version designated Lark 1B.
Made by Homebuilt aircraft.