Covid-19 Update – Situation in South Africa
Although South Africa (SA) is currently ranked amongst the top in the world regarding Covid-19 active cases, we are very
August 31, 2020
Latest News
JS2 Revenant – Step by Step
Our chief design engineer did not want to give any performance away with the JS2 fuselage. In fact, he designed
August 31, 2020
JS2 Revenant – Step by Step
The advantages CAD modeling brings to the table is a much faster integration time for parts. The time it took
August 31, 2020
Competitions
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
Congratulating the best women glider pilots in the world – 10th Women’s World Gliding Championship
Jonker Sailplanes would like to congratulate the best women glider pilots of the world with their stunning performance Down Under!
January 22, 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