The Keleher JK-1 Lark is a single-seat aerobatic sport aircraft that was designed in the United States in the early 1960s and later marketed for homebuilding.
It is a conventional, mid-wing, strut-braced monoplane with fixed tailwheel undercarriage.
[1] The fuselage and empennage are of welded steel tube construction, skinned in fabric.
[2] An example of the 1B won the "Outstanding Workmanship" award for L. C. Koetkemeyer at the 1968 EAA Fly-in.
Aircraft of comparable role, configuration, and era