Posts by Wessels

WING-FUSELAGE JUNCTION

WING-FUSELAGE JUNCTION

WING-FUSELAGE JUNCTION Johan Bosman, JS Chief Aerodynamicist, explains: Interference effects at the root junction cause additional drag and the fuselage itself can cause a reduction in wing lift. Design of the wing-fuselage junction to avoid these adverse effects is extremely challenging. However before the wing-fuselage junction itself was designed, the...

WING PLANFORM

WING PLANFORM

WING PLANFORM Johan Bosman, JS Chief Aerodynamicist, explains: The optimum wing planform has an elliptical lift distribution for minimum induced drag at low speeds, and a small wing area for reduced profile drag at high speed. The wings of the JS1 Revelation have an almost perfect lift distribution. We achieved...

AEROFOIL DESIGN

AEROFOIL DESIGN

AEROFOIL DESIGN Johan Bosman, JS Chief Aerodynamicist, explains: Aerofoil design is the key to the overall performance of a sailplane, so the design process of the JS1 Revelation started with development of the main wing aerofoil. Attie Jonker together with an NWU final year student had conducted wind tunnel tests...

JS Releases JS1C-18 EVO model: 24 July 2014

JS Releases JS1C-18 EVO model: 24 July 2014

JS Release the JS1C-18 EVO model: 24 July 2014 The newcomer will be known as JS1C-18 EVO. The JS1C-18 EVO redefines handling in the 18m class, offering both an improved roll rate and superb control at slow speeds. The increased wing loading, combined with new tip aerofoils and 3rd generation...

JS dominates 18m and Open Class in the 33rd World Gliding Championships

JS dominates 18m and Open Class in the 33rd World Gliding Championships

JS dominates 18m and Open Class in the 33rd World Gliding Championships The 33rd World Gliding Championships for the 15m, 18m and Open Class were held in Leszno, Poland from 26 July to 9 August 2014. 133 pilots from all over the world gathered with the latest equipment to determine...

JS announces partnership with M&D Flugzeugbau

JS announces partnership with M&D Flugzeugbau

JS announces partnership with M&D Flugzeugbau In March 2010 the JS1 Revelation gained its official Type Certification by the South African Civil Aviation Authorities (SACAA). The certification has been awarded only after rigorous analysis and testing, with robust compliance verification by SACAA. With SACAA Type Certification to the CS-22 standard...

MRC Announcement

MRC Announcement

MRC Announcement MRC Announcement Another first for JS - the first flapped 18/21m high performance glider fitted with a manual hand rudder control (“MRC”) for pilots with reduced leg functionality. The MRC system has been designed solely by the young JS engineering team over the last 6 months. According to...

JS as the Aero Friedrichshafen

JS as the Aero Friedrichshafen

JS as the Aero Friedrichshafen JS will be presenting our latest JS1-18/21 Evo fitted with the Jet Turbine at this year’s AERO EXPO Friedrichshafen from 15 to 18 April 2015. With more than 600 exhibitors from 35 countries, 33,000 visitors and 600 journalists from all over the world, the AERO...

French Championships

French Championships

French Championships French Championships 2015 (Open Class) Buno -Bonneveaux, France 21 May - 30 May 2015. Killian Walbrou won the competition and Sébastien Dubreuil came third. On the photo: Sébastien Dubreuil (left) and Killian Walbrou (right)

Nomination Ocseny

Nomination Ocseny

Nomination Ocseny Congratulations to Adam Czeladzki who has been selected to present Poland in the 2015 European Gliding Championships. What make this achieve so special is the fact that Adam does not have the use of his legs, and when flying he only uses hand control. Jonker Sailplanes is proud...

JS takes first four places in Europeans Open Class

JS takes first four places in Europeans Open Class

JS takes first four places in Europeans Open Class Team JS would like to congratulate all the pilots participating in the EGC 2015. A special word of congratulations must go to Lukasz Wocjek, Adam Czeladzki and Jereon Verkuil, cleaning up the Open Class. This was a great event for JS...

JS pilot cleaning up the UK Open Class Nationals

JS pilot cleaning up the UK Open Class Nationals

JS pilot cleaning up the UK Open Class Nationals The 2015 UK Nationals, hosted by the Cambridge Gliding Club, was dominated by the JS pilots. Seven JS1s entered the competition - and seven finished in the top seven! What a remarkable result. Click image to view results

FAI Sailplane Grand Prix – Series VI World Final – Varese, Italy

FAI Sailplane Grand Prix – Series VI World Final – Varese, Italy

FAI Sailplane Grand Prix – Series VI World Final – Varese, Italy Team JS would like to congratulate everyone involved in the 2015 SGP for delivering such a spectacular event! A special word of congratulations to the winners, Maximilian Seis and Christophe Ruch from France and Sebastian Kawa from Poland....

JS sponser FAI 9th Junior World Gliding Championships 2015, Narromine, Australia

JS sponser FAI 9th Junior World Gliding Championships 2015, Narromine, Australia

Congratulations to the JWGC 2015 winners

Congratulations to the JWGC 2015 winners

Congratulations to the JWGC 2015 winners JS would like to congratulate the winners of the 2015 Junior World Gliding Championship, held in Narromine Australia, from 1-12 December 2015. The winners of the club class is Tom Arscott (GBR) 9155pts, and of the standard class, Matthew Scutter (AUS) 9070pts. http://www.jwgc2015.com/ JS...

100 down, many more to come!

100 down, many more to come!

100th JS1 push out 100 down, many more to come! Well done to the entire JS team. Congratulations to the owner, Andreas Kuhl, may you soar many thermals in the 100th JS1! The legend has grown over 100 sailplanes and so has the factory. As the only South African Type...

JS AND M&D JET CERTIFICATION A REALITY

JS AND M&D JET CERTIFICATION A REALITY

JS AND M&D JET CERTIFICATION A REALITY In 2009 Jonker Sailplanes and M&D Flugzeugbau, started a 6-year long adventure, the JS1 JET. This project included the installation of the MD TJ 42 sustainer engine, with a radial flow compressor and a single stage turbine, into the JS1. This adventure took...

750km & 1000km records – Edward Downham (UK)

750km & 1000km records – Edward Downham (UK)

750km & 1000km records – Edward Downham (UK) JS would like to congratulate Edward Downham with his spectacular, Free Out and Return Distance, 1000km and 750 km performances in his JS1C in Bloemfontein this December ! Check out his flights

The 100th JS1, the start of a new era.

The 100th JS1, the start of a new era.

The 100th JS1, the start of a new era. The 100th JS1 Revelation had its test flight in December 2015. To celebrate this milestone a prestigious event was held in February this year to celebrate with all our customers, agents, funders, and suppliers! The celebrations were held at The Roots...

Flight Challenge Cup Gliding 2016, First for Sebastian Kawa in a JS

Flight Challenge Cup Gliding 2016, First for Sebastian Kawa in a JS

Flight Challenge Cup Gliding 2016, First for Sebastian Kawa in a JS Congratulations to Sebastian Kawa and Adam Czeladzki who ended in the second and third places in the mixed class at the Flight Challenge Cup Gliding 2016 10.04. - 21.04.2016 Prievidza - Slovakia. Sebastian won 5 of the 8...

1 2 3 4 5