18m/21m flapped sailplane

The JS1 Revelation, high-performance FAI 18/21-metre Open Class sailplane.

The JS1, designed with incorporated aspects such as aerodynamics, structures, and pilot comfort, has rapidly gained world recognition with its great performance and handling characteristics.

The JS1 is available as either a pure sailplane or with the MD-TJ 42 jet sustainer system installed. Although production has been discontinued, immaculate previously owned JS1’s are available across the globe.

The JS1 not only displays good gliding ratio at moderate speeds but also at high speeds and maintains its outstanding climbing performance.

A lightweight structure and a unique double-hole blowing/suction system on the wing enabling very low drag allow the JS1 to reach a top speed of 290km/h. Another gain for speed is water tanks in the wings, a small lift sacrifice for a big advantage.

With the combination of excellent performance, a wide range of available wing loadings and superlative handling, the JS1C-21m is extremely competitive at the highest level, without the disadvantages of older generation Open Class gliders.

The increased wing loading, combined with new tip aerofoils and third-generation winglets gives the JS1 its edge at high speeds.

-Control surface gaps sealed with the Streifeneder Teflon/Mylar system
-Cockpit airflow controlled with an air extractor
-Integrated bug wiper garages
-Integrated water ballast tanks in main wings – 180 l
-Expendable tail ballast tank – 7.5 l
-Non-expendable tail ballast tank – 5 l
-JS Louvred Cockpit Air Extractor

A safety is not negotiable the JS1 is a clearly setting the standard. Flying a JS1 will give you a safe feeling with highly desirable flight characteristics.

Flying fast in turbulent conditions? A high maximum rough air speed allows you to cruise safely and legally on those strong days.

Should you need to deploy your airbrakes at VNE, a unique damper system limits the extension rate, reducing the sharp stress impact on the wings and preventing your head slamming through the canopy.

Our safety cockpit made from carbon and aramid fibre with integral crumple zones will stay intact even with an impact of 9Gs preventing serious injuries that may arise from that unfortunate situation.

The handling characteristic of the JS1 is one of the features that made the JS1 stand out and gain rapid world recognisance.

The JS1 not only offers the serious competition pilot a performance advantage but also remains suitable for every pilot, owing to its excellent handling qualities.

The JS1C-18 EVO redefined handling in the 18 m class by offering improved roll rate and superb control at slow speeds.

https://jonkersailplanes.co.za/js1c/