Posts by Wessels

Sailplane Grand Prix Final 2016

Sailplane Grand Prix Final 2016

Sailplane Grand Prix Final 2016 By Holger Karow At this year's SGP Final, which took place in Potchefstroom from the 6th till 12th November, I became World Champion for the third time after 1999 in Bayreuth and 2003 in Leszno. And still this competition was completely different!   Starting with...

Oceania

Oceania

Oceania: Australia & New Zealand Todd Clark Email: toddclark@hotmail.com Tel: +61 267 669109 Mobile: +61 409386667 Brett Hunter Email: hunter.b@ihug.co.nz Tel: +64 757 66962 Mobile: +64 21927626

Scandinavia

Scandinavia

Scandinavia: Denmark, Finland, Sweden and Norway Zoran Frenc Email: zoran.frenc@gmail.com Tel: +381 69121 0710 Mobile: +381 69121 0710 Riccardo Brigliadori Email: riccardo.brigliadori@pilotapersempre.it Tel:  Mobile: +39 3408 408324

South Eastern Europe

South Eastern Europe

South Eastern Europe: Serbia, Hungary, Croatia, Bosnia, Czech Republic, Slovakia, Romania and Italy Zoran Frenc Email: zoran.frenc@gmail.com Tel: +381 69121 0710 Mobile: +381 69121 0710 Riccardo Brigliadori Email: riccardo.brigliadori@pilotapersempre.it Tel:  Mobile: +39 3408 408324

Central Europe

Central Europe

Central Europe: Netherlands, Belgium and Luxembourg Ronald Termaat Email: ronald@termaat.me Tel: +31 263 515916 Mobile: +31 614 019198

Western Europe: England, Wales, Ireland, Scotland

Western Europe: England, Wales, Ireland, Scotland

Western Europe: England, Wales, Ireland and Scotland Iain Evans Email: iain@shrinenewton.co.uk Tel: +44 1531 670522 Mobile: +44 7905 233868 Andy Davis Email: paminandy@compuserve.com Tel: +44 1453 860945 Mobile: +44 7850 129450

South America

South America

South America Walter Mirasso Email: commercial@wavesargentina.com.ar Tel: +54 349 245 2703 Mobile: +54 934 926 50534

North America: USA, Canada, Mexico

North America: USA, Canada, Mexico

North America: USA, Canada and Mexico Leo Benetti-Longhini Email: info@jonkersailplanes.com Tel: +1 931 455 5994 Mobile: +1 931 434 3434 Jim Lee Email: jim@jonkersailplanes.com Tel: +1 352 250 5644 Mobile: +1 775 392 0452

JS 1 HAND CONTROL SYSTEM

JS 1 HAND CONTROL SYSTEM

JS 1 SELF LAUNCHER

JS 1 SELF LAUNCHER

The JS1-S Revelation is a high-performance FAI 18/21-metre Class sailplane, fully-equipped in its baseline standard with an optional Self launching SOLO Aircraft Engine 2625 02, (http://aircraft.solo-online.com/index.php) or M&D TJ42 jet turbine. Standard Features General Multi Wingspan, with options for 18m and/or 21m TOST™ Nose Release Hook and TOST™ C.G. Hook...

JS 1 JET

JS 1 JET

Jonker Sailplanes have selected the M&D Flugzeugbau TJ42 jet turbine engine. M&D Flugzeugbau are a German company based in Friedeburg, Lower Saxony in north-western Germany. M&D Flugzeugbau manufacture the Samburo motorglider and also provide maintenance services for other light aircraft. In 2007 M&D identified the potential benefits of installing a...

JS1 C 21m EVO

JS1 C 21m EVO

STANDARD FEATURES General ► Multi wingspan, including 18m wingtips with provision for 21m wingtips ► TOST™ nose release hook ► Provision for C.G. TOST™ belly hook enclosed by main wheel doors ► Fixed pneumatic tail wheel (brass or Vesconite) ► ESA TE multi-probe (pilot, static pressure and Total Energy) ►...

JS1 C 18 EVO

JS1 C 18 EVO

STANDARD FEATURES General ► Multi wingspan, including 18m wingtips with provision for 21m wingtips ► TOST™ nose release hook ► Provision for C.G. TOST™ belly hook enclosed by main wheel doors ► Fixed pneumatic tail wheel (brass or Vesconite) ► ESA TE multi-probe (pilot, static pressure and Total Energy) ►...

STRUCTURE

STRUCTURE

STRUCTURE Attie Jonker, JS Chief Engineer, explains: The structural design of the JS1 Revelation was done using normal engineering methods. Conventional structures (such as the controls and landing gear) were designed using traditional calculation methods, with hand calculations for simple geometries and laminate analysis for simple composite structures. The more...

CERTIFICATION

CERTIFICATION

CERTIFICATION In March 2010 the JS1 Revelation gained its official certification by the South African Civil Aviation Authorities (SACAA). With SACAA Type Certification to CS-22 and with an SACAA ICAO- compliant Certificate of Airworthiness the JS1 Revelation should be able to be flown without restriction in any ICAO-signatory country. The...

CUSTOMER SUPPORT

CUSTOMER SUPPORT

CUSTOMER SUPPORT Jonker Sailplanes has a full SACAA Part 145 maintenance and repair capability at the JS Facility in Potchefstroom. Jonker Sailplanes offers authorized maintenance and repair facilities outside South Africa. South African registered sailplanes operated outside South Africa can be maintained and repaired under Jonker Sailplanes MRO Approval, under...

SYSTEMS

SYSTEMS

SYSTEMS Attie Jonker, JS Chief Engineer, explains: The kinematic linkages and structures for both the landing gear and the flight controls were designed via more traditional calculation methods. Spreadsheets and solvers were used to determine the optimum linkage motion and then iterated with CAD solid modeling to fine tune the...

AIR EXTRACTOR

AIR EXTRACTOR

AIR EXTRACTOR Johan Bosman, Chief Aerodynamicist at Jonker Sailplanes, and his team have used Computational Fluid Dynamic (CFD) methods to successfully develop and optimise a significantly improved type of cockpit air extractor. The unique aspects of the JS Louvred Air Extractor are the subject of a worldwide patent application. It...

FLAP FENCES

FLAP FENCES

FLAP FENCES Johan Bosman, JS Chief Aerodynamicist, explains: Whenever there is a difference in load on the wing, a vortex will form with excess drag as a result. Flap fences reduce the vortex size, because the pressure difference is “capped off”. The flap fences on the JS1 Revelation are fixed...

WINGLET

WINGLET

WINGLET Johan Bosman, JS Chief Aerodynamicist, explains: It is known that winglets can reduce induced drag by reducing the tip vortex. They can also increase aileron efficiency, giving better overall handling characteristics. However an incorrectly designed winglet can absolutely ruin the performance, especially at higher cruise speeds. Designing winglets is...

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