JS2 Revenant Maiden Flight
Jonker Sailplanes has completed the development of their most advanced glider designed to date – the JS2 Revenant. Uys Jonker,
April 8, 2021
Latest News
JS3: A Nordic Sales Success
There are already four planes flying in the Nordic region. Now JS’ agent, Arne Boye-Moller, can add another seven orders to
April 7, 2021
JS2 STEP BY STEP
The maiden flight of any new product is such an amazing and exciting occasion. Imagine the rewarding feeling if everybody
March 26, 2021
Competitions
South African Nationals – Welkom 12-20 December 2020
Despite the threat of Covid, South African and various overseas pilots were keen to compete in our annual national gliding
February 5, 2021
Jannen Kisat / Purjelennon SM 2020
Congratulations to Martti Koivula who reigned as the Fin open class nationals champion flying his JS1 “GOL”. The competition consisted
August 12, 2020
Campionato Italiano Classe and Coppa Città di Ferrara 2020
Congratulations to Riccardo Brigliadori for winning both the Coppa Città di Ferrara 2020 and the Campionato Italiano Classe UNICA 2020
July 9, 2020
Tech Talks
Why you should avoid too large winglets – from our Aerodynamic Chief Engineer Johan Bosman
The image shows a flow field around a wing tip without a #winglet. More precisely, it shows the extent of positive
May 8, 2020
JS5 (Open Class Single seater) wing design from our Aerodynamic Chief Engineer Johan Bosman.
The #JS5 wing has 2 sections per side with a removable winglet (as strongly recommended by Cobra trailer design team). The 4
May 8, 2020
JS3 high wing design – from our Aerodynamic Chief Engineer Johan Bosman
Why did you select a high-wing configuration on the JS3? Top performance sailplanes essentially must have the ability to climb
May 8, 2020