The #JS5 wing has 2 sections per side with a removable winglet (as strongly recommended by Cobra trailer design team). The 4 flaps per side are driven by 4 drivers, as the aerodynamic twist associated with these long wings could just not be structurally designed out. Intensive wing and flap twist modulations were performed to ensure we de …
The image shows a flow field around a wing tip without a #winglet . More precisely, it shows the extent of positive inflow angles at the tip region. The addition of a winglet would utilize this flow field and increase performance, only if it is inside the boundary of positive inflow angles. At higher flight speeds, the positive-inflow-angle flow fie …
JS is expanding its product range and plans to release a product in the standard class – the JS4. It is important to have the “voice of the customer” early in the design phase, to ensure we specify a product meeting our customer’s needs. We need to understand who has interest in our new products, what configurations are important and what powe …
Production at JS was unfortunately interrupted by the Corona virus. The South African Government has followed world best practises to slow down the spread of the COVID-19/Corona virus. At this moment there are more than a thousand cases of infection reported in South Africa, including five fatalities. Eight cases have been re …
The MD-TJ 42 Jet Turbine creates the most versatile sailplane sustainer system ever made. The installation weighs a mere 17kg and with an additional 17kg of fuel an amazing 150km range is possible, climbing 2m/s at 140km/h. In the unlikely event that you are late with that critical appointment with your dear partner, you may even blast home at 220 …
Jonker Sailplanes would like to congratulate the best women glider pilots of the world with their stunning performance Down Under! We particularly would like to congratulate all the winning girls: – Mélanie Gadoulet (France) in 18m class. – Sarah Kelly Arnold (USA) Standard class – Elena Fergnani (Italy) Club class. Team JS is especial …
The Sailplane Grand Prix Series 10 – 2nd Qualifying round, hosted by Akavlieg Potchefstroom Gliding Club, was held from 3 January 2020 – 11 January 2020. Oscar Goudriaan (SA) reigned champion followed by Louis Bouderlique (France) and Marcus Nouwens (SA), all flying JS3. Fourteen pilots competed where seven flew JS3s, six JS1s and …
I started gliding in 2004 at Potchefstroom gliding club after attending a training day during the final year of High school. Being from a small town, approximately 50 km north of Potchefstroom, and being involved in farming activities during most of my time there my original plan was to become a veterinarian. One flight in a glider however convince …
While other manufacturers claim to have an uncompromised design, we in the JS design team believe in a perfectly compromised design, taking into account all of the aspects of what makes a glider a superior product and balancing this to achieve the best designed glider in the world. Jonker Sailplanes has shown that they are not afraid to try new inno …
From 4 August 2019 – 14 August 2019 JS’s European Agents participated at the COPPA INTERNATIONALE DEL MEDITERRANEAN CIM in Rieti – Bella Italia. This competition included spectacular mountain flying, awesome Italian food, nice company and friendship… The THINK-PINK friends group!!!! Too much fun…. Ten great contests days had a …
JS made some changes to the marketing structure in the European region. To enable us to meet the needs of our growing customer base, we have appointed two more agents, Yves Gerster and Katrin Senne . Yves lives in Switzerland, has been involved with JS since 2014 when he did his engineering internship at our design office. Since then, …
The UK Open Class Nationals, in spite of some relatively challenging weather, had six successful competition days! Many Congratulations to the winners Andy Davis, Tim Jenkinson and Peter Harvey, all flying in their JS1C-21 gliders! It’s also worth mentioning that the JS1 has now won the UK Open Class Nationals every year since 2013!! https://www …
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