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1 pendulaire
pendulaire [pɑ̃dylεʀ]1. adjective2. masculine noun( = ULM) powered hang-glider* * *pɑ̃dylɛʀadjectif [mouvement] pendular* * *pɑ̃dylɛʀ adj* * *pendulaire adj1 [mouvement] pendular;2 Rail train pendulaire tilting train;3 Transp travailleur pendulaire commuter.[pɑ̃dylɛr] adjectif————————[pɑ̃dylɛr] nom masculin et féminin -
2 motolotnia
The New English-Polish, Polish-English Kościuszko foundation dictionary > motolotnia
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3 Rogallo, Francis Melvin
SUBJECT AREA: Aerospace[br]b. 1912 USA[br]American engineer who patented a flexible-winged hand-glider in 1948.[br]After the hang-gliders of pioneers such as Lilienthal, Pilcher and Chanute in the 1890s, this form of flying virtually disappeared for seventy years. It was reintroduced in the late 1960s based on Francis Rogallo's flexible wing, patented in the United States in 1948. Rogallo's wing was very basic: it consisted of a fabric delta wing with a solid boom along each leading edge and one along the centre line. Between these booms, the fabric was free to billow out into two partial cones. Variations of the Rogallo flexible wing were investigated in the 1960s by Ryans as a means of recovering space vehicles (e.g. Saturn booster), and by North American for the recovery of Gemini spacecraft. In 1963 a version with a 155 kW (210 hp) engine was tested by the US services as a potential lightweight transport vehicle. None of these made a great impact and the Rogallo wing became popular as a hang-glider c. 1970. The pilot was suspended in a harness below a lightweight Rogallo wing. A framework attached to the wing structure allowed the pilot to move his or her body in any direction relative to the wing. Thus, if they wished to dive, they would move their weight forward, which made the glider nose-heavy. This was a great improvement over the earlier hang-gliders, in which the upper part of the pilot's body was held in a fixed position and control was achieved by swinging the legs. Rogallo-wing hang-gliders became very popular as they were relatively cheap and easy to transport. Once the sport developed, powered "microlights" made their appearance and a new branch of popular flying was established.[br]Further ReadingAnn Welsh, 1977, "Hang glider development", Aerospace (Royal Aeronautical Society) (August/September).JDSBiographical history of technology > Rogallo, Francis Melvin
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4 Lilienthal, Otto
SUBJECT AREA: Aerospace[br]b. 23 May 1848 Anklam, Prussia (now Germany)d. 10 August 1896 Berlin, Germany[br]German glider pioneer, the first to make a controlled flight using wings.[br]Otto Lilienthal and his brother Gustav developed an interest in flying as boys, when they studied birds in flight, built models and even tried to fit wings to their arms. Gustav went on to become a successful architect while Otto, after a brilliant scholastic career, became a mechanical engineer. Otto was able to devote his spare time to the problems of flight, and Gustav helped when his work allowed. They considered manpowered and mechanically powered projects, but neither looked hopeful so they turned to gliding. Otto published his research work in a book, Bird Flight as a Basis for Aviation. By 1889 Otto Lilienthal was ready to test his first full-size gliders. No. 1 and No. 2 were not successful, but No. 3, built in 1891, showed promise. He gradually improved his designs and his launching sites as he gained experience. To take off he ran downhill carrying his hang-glider until it became airborne, then he controlled it by swinging his body weight in the appropriate direction. He even built an artificial mound near Berlin so that he could take off into the wind whichever way it was blowing.In all, Lilienthal built some eighteen gliders with various wing shapes, including biplanes. By 1895 he was planning movable control surfaces (operated by head movement) and a powered version using a carbonic acid gas motor. Unfortunately, Lilienthal crashed and died of his injuries before these ideas could be tested. In all, he made over two thousand flights covering distances up to 300 m (300 yds. Many of these flights were recorded on photographs and so generated an interest in flying. Lilienthal's achievements also encouraged other pioneers, such as Percy Pilcher in Britain, and Octave Chanute and the Wright brothers in the United States.[br]Bibliography1899, Der Vogelflug als Grundlage der Fliegekunst, Berlin, reprinted c. 1977; repub. in English, 1911, as Bird Flight as a Basis for Aviation.Further ReadingCharles H.Gibbs-Smith, 1985, Aviation, London (provides a detailed account of Lilienthal's gliders).P.H.Lilienthal, 1978, "Die Lilienthal Gebrüder", Aerospace (Royal Aeronautical Society) (January) (for more personal information)."The Lilienthal and Pilcher gliders compared", Flight (1 January 1910 and 8 January 1910) (for details about and plans of a typical Lilienthal glider).JDS
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