Jonker JS-3 Rapture

The Jonker JS-3 Rapture is a glider built of glass-fibre, carbon fibre and Kevlar. It has a 15 m (49.2 ft) wingspan.

JS-3 Rapture
Role High performance Sailplane
National origin South Africa
Manufacturer Jonker Sailplanes
First flight 12 December 2016

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.

Design and development
JS-3 Rapture

Type certification of the JS-MD 3 was achieved with EASA on 18 July 2019. [1]

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.[2]

Variants
JS-3 Rapture 15m
Version with 15 m (49 ft) wings
JS-3 Rapture 18m
Version with 18 m (59 ft) wings

Specifications (JS3 - RAPTURE 18m)

Data from JS 3 Rapture 18m – Jonker Sailplanes[2]

General characteristics

  • Crew: one
  • Length: 6.86 m (22 ft 6 in)
  • Wingspan: 18 m (59 ft 1 in)
  • Height: 1.22 m (4 ft 0 in)
  • Aspect ratio: 32.8
  • Empty weight: 280 kg (617 lb) without engine, 297 kg (655 lb) with engine
  • Gross weight: 600 kg (1,323 lb)
  • Max takeoff weight: 430 kg (948 lb) without water ballast

Performance

  • Maximum glide ratio: 55:1 at 120 km/h (75 mph; 65 kn) at MAUW
  • Best glide speed at 450 kg (992 lb): 105 km/h (65 mph; 57 kn)
  • Rate of sink: 0.49 m/s (96 ft/min) 1.43 m/s (5 ft/s) at 200 km/h (120 mph; 110 kn) at MAUW
  • Wing loading: 37.0 kg/m2 (7.6 lb/sq ft) minimum, 60.36 kg/m2 (12 lb/sq ft) maximum
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See also

Aircraft of comparable role, configuration and era

Related lists

References
  1. "EASA approved – The JS3 Certification Journey – Jonker Sailplanes". jonkersailplanes.co.za.
  2. "JS 3 Rapture 18m – Jonker Sailplanes". jonkersailplanes.co.za. Archived from the original on 15 August 2019. Retrieved 15 August 2019.
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