The manufacturer is Jonker Sailplanes of Potchefstroom South Africa, founded in 2004 by two brothers, Attie and Uys Jonker. The structural and chief designer is Attie Jonker, while the airfoil and main aerodynamic features were developed by Johan Bosman in co-operation with the Delft University of Technology. The first flight of the JS-3 was on 12 December 2016. The JS3 is equipped with Tost nose and c.ofg. release hools, retractable main undercarriage leg with elastomeric shock absorbers, fixed pneumatic 180 mm (7.09 in) tail wheel with aluminium hub. A retractable 150 mm (5.91 in) tail wheel can be fitted in place of the fixed tailwheel. Provision is made to fit 2 x 12V LiFePo 7Ah/10Ah main batteries with fuse box in luggage compartment recessed battery boxes, accessible from cockpit. Conmmunications and navigation are improved through the use of a Goose-neck microphone, two independent speakers for radio, with antenna in the rudder and a navigation computer in the instrument panel. Variant JS-3 Rapture 18m Version with 18 m (59 ft) wings (Specifications below)
