The JK 01A Elf was designed by Krawczyk, based on the earlier work of American designer Alex Strojnikun. It features cantilever wings, a single-seat enclosed cockpit under a bubble canopy, fixed landing gear and a single engine in pusher configuration.
The aircraft is made from composites. Its 11.121NaN1 span wing has an area of 10.8m2, flaperons and provides a glide ratio of 26:1. The standard engine used was a 200NaN0 JPX D-320 two-stroke, but this engine is no longer available and any small horizontally-opposed engine in the 200NaN0 range can be used. An engine of this power provides a takeoff run of 1501NaN1. The propeller used has a folding design to reduce drag and the fuel tank fitted has a volume of . The landing gear uses dual, close-set mainwheels and a smaller nosewheel, with no wingtip wheels.
The company provides complete ready-to-fly aircraft and kits which offer the aircraft in various states of completion.
The first flight was made on 8 July 2006. There is no evidence of production beyond 2007/8.[2]