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Jonker Sailplanes
Jonker Sailplanes is a glider manufacturer based in Potchefstroom, South Africa. History Uys Jonker and his brother, Attie Jonker founded Jonker Sailplanes in 2004. Products The following aircraft are in production or under development * Jonker JS-1 Revelation 18m/21m flapped sailplane with jet sustainer - 2006 * Jonker JS-2 Revenant 18m/21m flapped self-launcher * Jonker JS-3 Rapture The Jonker JS-3 Rapture is a glider built of glass-fibre, carbon fibre and Kevlar. It has full-span flaps and can be operated with a wingspan of either or . The manufacturer is Jonker Sailplanes of Potchefstroom South Africa, founded in 2004 ... 15m/18m flapped with jet sustainer or electric propulsion * Jonker JS-4 Rengeti 15m/18m standard class sailplane with jet sustainer or electric propulsion * Jonker JS-5 Rey Open class sailplane with jet sustainer or self-launcher References {{Reflist External linksCompany website Aircraft manufacturers of South Africa Economy of North West ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glider (sailplane)
A glider or sailplane is a type of glider aircraft used in the leisure activity and sport of gliding (also called soaring). This unpowered aircraft can use naturally occurring currents of rising air in the atmosphere to gain altitude. Sailplanes are aerodynamically streamlined and so can fly a significant distance forward for a small decrease in altitude. In North America the term 'sailplane' is also used to describe this type of aircraft. In other parts of the English-speaking world, the word 'glider' is more common. Types Gliders benefit from producing the least drag for any given amount of lift, and this is best achieved with long, thin wings, a slender fuselage and smooth surfaces with an absence of protuberances. Aircraft with these features are able to soar – climb efficiently in rising air produced by thermals or hills. In still air, sailplanes can glide long distances at high speed with a minimum loss of height in between. Sailplanes have rigid wings and eithe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Gliders
This is a list of gliders/sailplanes of the world, (this reference lists all gliders with references, where available) Note: Any aircraft can glide for a short time, but gliders are designed to glide for longer. By nationality *List of American gliders *List of Argentine gliders * List of Australian gliders *List of Austrian gliders *List of Belgian gliders *List of Brazilian gliders *List of British gliders * List of Bulgarian gliders *List of Canadian gliders *List of Chinese gliders *List of Czechoslovak gliders *List of Danish gliders *List of Dutch gliders * List of Estonian gliders *List of Finnish gliders *List of French gliders *List of German gliders *List of Greek gliders *List of Hungarian gliders *List of Indian gliders *List of Iranian gliders *List of Irish gliders *List of Italian gliders *List of Japanese gliders *List of Latvian gliders *List of Lithuanian gliders *List of New Zealand gliders *List of Philippines gliders *List of Polish gliders *List of Portugu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potchefstroom
Potchefstroom (, colloquially known as Potch) is an academic city in the North West Province of South Africa. It hosts the Potchefstroom Campus of the North-West University. Potchefstroom is on the Mooi Rivier (Afrikaans for "pretty river"), roughly west-southwest of Johannesburg and east-northeast of Klerksdorp. Etymology Several theories exist about the origin of the city's name. According to one theory, it originates from ''Potgieter'' + ''Chef'' + ''stroom'' (referring to Voortrekker leader and town founder Andries Potgieter; "chef" indicates the leader of the Voortrekkers, and "stroom" refers to the Mooi River). Geoffrey Jenkins writes, "Others however, attribute the name as having come from the word 'Potscherf', meaning a shard of a broken pot, due to the cracks that appear in the soil of the Mooi River Valley during drought resembling a broken pot". M. L. Fick suggests that Potchefstroom developed from the abbreviation of "Potgieterstroom" to "Potgerstroom", whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Africa
South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring countries of Namibia, Botswana, and Zimbabwe; and to the east and northeast by Mozambique and Eswatini. It also completely enclaves the country Lesotho. It is the southernmost country on the mainland of the Old World, and the second-most populous country located entirely south of the equator, after Tanzania. South Africa is a biodiversity hotspot, with unique biomes, plant and animal life. With over 60 million people, the country is the world's 24th-most populous nation and covers an area of . South Africa has three capital cities, with the executive, judicial and legislative branches of government based in Pretoria, Bloemfontein, and Cape Town respectively. The largest city is Johannesburg. About 80% of the population are Black South Afri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uys Jonker
Uys is the surname of a family that played a significant role in South African history during the nineteenth century and made distinguished contributions to South African culture, politics and sports during the course of the twentieth. Origins The earliest existing records show the Uys family living in Leiden and Amsterdam in the Netherlands. The mother of the family's South African progenitor, Daentie Rycken (1645/46 – Stellenbosch 1725), was the first to arrive at the Cape in 1677 with her second husband, Jan Hendriksz de Lange (died Cape of Good Hope before June 1690). She briefly travelled to the Netherlands in 1697 with her third husband, Dirk Mol (died Stellenbosch 1731), and returned to the Cape in 1699 accompanied by her adult son, Cornelis Jansz Uys (Amsterdam 1671 – Cape of Good Hope c. 1716). Shortly thereafter, in 1704, Daentie settled on the farm By Den Weg in the Stellenbosch Kloof where she lived until her death in 1725. Cornelis Jansz Uys was the only child fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attie Jonker (1898–1965), South African rugby player and Olympic athlete
{{Disambiguation, given name, surname ...
Attie may refer to: * Attie people (Attié) ** Attie language People *Alice Attie (born 1950), American visual artist * Dotty Attie (born 1938), American artist, wife of David Attie and mother of Eli Attie * Eli Attie, American politician, son of David and Dotty Attie * (born 1989), French volleyball player *Shimon Attie (born 1957), American visual artist *, French actress *Attie Howard (1871–1945), Canadian ice hockey player * Attie Maposa (born 1990), South African cricketer *Attie van Heerden Adriaan "Attie" Jacobus van Heerden (10 March 1898 – 14 October 1965) was a South African Olympian 400-metre hurdler, rugby union and professional rugby league footballer who played in the 1920s. He played representative level rugby union (R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jonker JS-1 Revelation
The Jonker JS-1 Revelation is a glider built of glass-fibre, carbon fibre and Kevlar. It is available with an 18-metre span for the 18 metre class or a 21-metre span for the Open class. The manufacturer is Jonker Sailplanes of Potchefstroom South Africa, founded in 2004 by two brothers, Attie and Uys Jonker. The structural and chief designer is Attie Jonker, while the airfoil and main aerodynamic features were developed by Johan Bosman in co-operation with the Delft University of Technology. 18 metre versions The wing has full-span flaperons, an elliptical planform and uses winglets. It is in 4 pieces, each tip is 1.5 metres. Two novel features are: * a double-hole blowing/suction system in the wings to minimise drag. The two rows of blow holes on the lower surface prevent turbulent flow at specific locations for different flap settings, thus reducing drag * a jet engine for the self-sustaining version. A self-launching version was considered but it was decided that the fusela ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jonker JS-2 Revenant
Jonker () is a Dutch surname. It is also a variation of the title jonkheer. The name can be occupational of origin, indicating an ancestor who was or worked for a jonkheer, or toponymical, e.g. referring to a house named ''De Jonker''. at the Database of Surnames in The Netherlands. People with the surname include: * (born 1962), Dutch football player and manager * (1933–1991), South African racing cyclist * |
Jonker JS-3 Rapture
The Jonker JS-3 Rapture is a glider built of glass-fibre, carbon fibre and Kevlar. It has full-span flaps and can be operated with a wingspan of either or . The manufacturer is Jonker Sailplanes of Potchefstroom South Africa, founded in 2004 by two brothers, Attie and Uys Jonker. The structural and chief designer is Attie Jonker, while the airfoil and main aerodynamic features were developed by Johan Bosman in co-operation with the Delft University of Technology. The first flight of the JS-3 was on 12 December 2016. Design and development Type certification of the JS-MD 3 was achieved with EASA on 18 July 2019. The JS3 is equipped with Tost nose and centre of gravity release hooks, retractable main undercarriage leg with elastomeric shock absorbers, and a fixed pneumatic tail wheel with an aluminium hub. A retractable tail wheel can be fitted in place of the fixed tailwheel. Provision is made to fit two 12V LiFePo 7Ah/10Ah main batteries with a fuse box in the luggage c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jonker JS-4 Rengeti
Jonker () is a Dutch surname. It is also a variation of the title jonkheer. The name can be occupational of origin, indicating an ancestor who was or worked for a jonkheer, or toponymical, e.g. referring to a house named ''De Jonker''. at the Database of Surnames in The Netherlands. People with the surname include: * (born 1962), Dutch football player and manager * (1933–1991), South African racing cyclist * |
Jonker JS-5 Rey
Jonker () is a Dutch surname. It is also a variation of the title jonkheer. The name can be occupational of origin, indicating an ancestor who was or worked for a jonkheer, or toponymical, e.g. referring to a house named ''De Jonker''. at the Database of Surnames in The Netherlands. People with the surname include: * (born 1962), Dutch football player and manager * (1933–1991), South African racing cyclist * |
Aircraft Manufacturers Of South Africa
An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines. Common examples of aircraft include airplanes, helicopters, airships (including blimps), gliders, paramotors, and hot air balloons. The human activity that surrounds aircraft is called ''aviation''. The science of aviation, including designing and building aircraft, is called '' aeronautics.'' Crewed aircraft are flown by an onboard pilot, but unmanned aerial vehicles may be remotely controlled or self-controlled by onboard computers. Aircraft may be classified by different criteria, such as lift type, aircraft propulsion, usage and others. History Flying model craft and stories of manned flight go back many centuries; however, the first manned ascent — and safe descent — in modern times took place by larger hot-air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
