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, so they 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.
Model aircraftPhysical model of an aircraft for display, research, or amusement Singapore Airlines Boeing 747-400 scale display model Group of students with their wooden model airplanes in Sonta, Serbia, 1936.A model aircraft is a physical model of an existing or imagined aircraft, and is built typically for display, research, or amusement. Model aircraft are divided into two basic groups: flying and non-flying. Non-flying models are also termed static, display, or shelf models.
PropulsionPropulsion is the generation of force by any combination of pushing and/or pulling to modify the translational motion of an object, which is typically a rigid body (or an articulated rigid body) but may also concern a fluid.
Ludwig PrandtlLudwig Prandtl (German pronunciation:; 4 February 1875 – 15 August 1953) was a German fluid dynamicist, physicist and aerospace scientist. He was a pioneer in the development of rigorous systematic mathematical analyses which he used for underlying the science of aerodynamics, which have come to form the basis of the applied science of aeronautical engineering.
Glider (aircraft)A glider is a fixed-wing aircraft that is supported in flight by the dynamic reaction of the air against its lifting surfaces, and whose free flight does not depend on an engine. Most gliders do not have an engine, although motor-gliders have small engines for extending their flight when necessary by sustaining the altitude (normally a sailplane relies on rising air to maintain altitude) with some being powerful enough to take off by self-launch.
PaperPaper is a thin sheet of matted cellulosefibers. Largely derived from lignocellulose, paper is created from a pulp dissolved into a slurry that is drained and dried into sheets. Different types of paper are defined by constituent fiber, paper pulp, sizing, coating, paper size, paper density and grammage.
International Union of Theoretical and Applied MechanicsThe International Union of Theoretical and Applied Mechanics (IUTAM) is an international non-governmental scientific organization whose primary mission is to promote theoretical and applied mechanics as a scientific discipline, especially by organizing international congresses, symposia and summer schools.
Dart (missile)Darts are airborne ranged weapons. They are designed to fly such that a sharp, often weighted point will strike first. They can be distinguished from javelins by the presence of fletching (feathers on the tail) and a shaft that is shorter or more flexible. Darts can be propelled by hand or with the aid of a hand-held implement such as a blowgun. They can be distinguished from arrows because they are not used with a bow. Darts have been used since pre-history.
PaperboardPaperboard is a thick paper-based material. According to ISO standards, paperboard is a paper with a grammage above 250 g/m, but there are exceptions. Paperboard can be single- or multi-ply. The related term box board dates at least to the 1790s. Terminology and classifications of paperboard are not always uniform.
American EnglishAmerican English, sometimes called United States English or U.S. English, is the set of varieties of the English language native to the United States. English is the most widely spoken language in the U.S., as well as the common language used in government, education, and commerce in all 50 states, the District of Columbia, and in all U.S. territories except Puerto Rico. Since the late 20th century, American English has become the most influential form of English worldwide.British EnglishBritish English is the set of varieties of the English language native to the United Kingdom, especially Great Britain. More narrowly, it can refer specifically to the English language in England, or, more broadly, to the collective dialects of English throughout the United Kingdom taken as a single umbrella variety, for instance additionally incorporating Scottish English, Welsh English, and Northern Irish English.
OchromaOchroma pyramidale, commonly known as balsa, is a large, fast-growing tree native to the Americas. It is the sole member of the genusOchroma, and is classified in the subfamily Bombacoideae of the mallow family Malvaceae. The tree is famous for its wide usage in woodworking, due to its softness and its high strength compared to its low density. The name balsa is the Spanish word for "raft" and the Portuguese word for ferry.paper planeRelated word or term.*As an Amazon Associate I earn from qualifying purchases.