Variously known as "Przasnicza", "Don Kichot", or "Don Quixote", the J-1 was designed by Jaroslaw Janowski in 1967. It featured a single seat enclosed cockpit, conventional (taildragger) landing gear, and a pusher prop configuration. Wings were shoulder mounted and strut-braced, with a 13% thick Clark "Y" airfoil and no flaps. 

With the help of Witold Kalita, the prototype was constructed in Poland and first flown on July 30, 1970. It weighed 286 lbs empty, and was constructed mostly of wood with a steel tube frame and fabric covering. Wings were constructed with one-piece ribs and a plywood covered leading edge "D-section". Power was provided by a two cylinder 23 hp "Saturn 500B" engine which was also designed by Janowski and constructed by S. Polawski.
 

 

Specifications:
 Wingspan: 24 ft 7.25in
 Wing Chord: 3 ft 3 in
 Length: 16 ft 4.75 in
 Height: 4 ft 5.75 in
 Empty Weight: 286 lbs
 Maximum Weight: 551 lbs
 Maximum Speed, Level Flight: 103 mph
 Cruise speed: 75 mph
 Stall speed: 41 mph
 Take-off Run: 328 ft
 Landing Roll: 164 ft
 Fuel Capacity: 4.4 Imp gallons
 Nominal Range: 248 miles
 

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