style=font-size:large;| Jonker JS-1

Type designation	JS-1
Competition class	18 metre
Crew	1
Length	m
Height	m
Cockpit width	m
Cockpit height	m
Wingspan	18 m
Wing area	11.25 m²
Aspect ratio	28.8
Wing profile	JS-02-127 T12 with 6 variations along wing
Empty mass	280 kg
Water ballast	200 kg
Maximum mass	600 kg
Wing loading	31.2 - 53.3 kg/m²
Maximum speed	290 km/h
Rough air speed	198 km/h
Stall speed	75 km/h
Minimum sink rate	0.4 m/s
Best glide ratio	53

The JS-1 Revelation is a 18 metre class glider

Glider (sailplane)

A glider or sailplane is a type of glider aircraft used in the sport of gliding. Some gliders, known as motor gliders are used for gliding and soaring as well, but have engines which can, in some cases, be used for take-off or for extending a flight...

 built of glass-fibre, carbon fibre and Kevlar

Kevlar

Kevlar is the registered trademark for a para-aramid synthetic fiber, related to other aramids such as Nomex and Technora. Developed at DuPont in 1965, this high strength material was first commercially used in the early 1970s as a replacement for steel in racing tires...

.

The manufacturer is Jonker Sailplanes of Potchefstroom South Africa

South Africa

The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...

, founded in 2004 by two brothers, Attie and Uys Jonker. The designer is Attie Jonker, while the airfoil was developed by Johan Bosman in co-operation with the Delft University of Technology

Delft University of Technology

Delft University of Technology , also known as TU Delft, is the largest and oldest Dutch public technical university, located in Delft, Netherlands...

. The wing has full-span flaperons, an elliptical planform and uses winglets. It is in 4 pieces, each tip is 1.5 metres.

Two novel features are:

• a double-hole blowing/suction system in the wings to minimise drag. The two rows of blow holes on the lower surface prevent turbulent flow at specific locations for different flap settings, thus reducing drag
• a jet engine
  Jet engine
  A jet engine is a reaction engine that discharges a fast moving jet to generate thrust by jet propulsion and in accordance with Newton's laws of motion. This broad definition of jet engines includes turbojets, turbofans, rockets, ramjets, pulse jets...
  
   for the self-sustaining
  Motor glider
  A motor glider is a fixed-wing aircraft that can be flown with or without engine power. The FAI Gliding Commission Sporting Code definition is: A fixed wing aerodyne equipped with a means of propulsion ,...
  
   version. A self launching version is to be developed.

The first flight of the JS-1 was on 12 December 2006. After certification, series production of the JS-1 Revelation is expected to start at the end of 2007.

Attie won the 18 metre class South African National Championship in 2008 with a JS-1 Revelation.