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Paper airplanes are fun and simple for all ages. Paper airplanes can be made in five easy steps. Start by folding a piece of paper in half vertically.
A paper plane, paper aeroplane (UK), paper airplane (US), paper glider, paper dart or dart is a toy aircraft (usually a glider) made out of paper or paperboard; the practice of constructing paper planes is sometimes referred to as aerogami (Japanese: kamihikōki), after origami, the Japanese art of paper folding. [28]
A simple folded paper plane Folding instructions for a traditional paper dart. A paper plane (also known as a paper airplane or paper dart in American English, or paper aeroplane in British English) is a toy aircraft, usually a glider, made out of single folded sheet of paper or paperboard.
Examples of soaring flight by birds are the use of: Thermals and convergences by raptors such as vultures; Ridge lift by gulls near cliffs; Wave lift by migrating birds [32] Dynamic effects near the surface of the sea by albatrosses; For humans, soaring is the basis for three air sports: gliding, hang gliding and paragliding.
A glider or sailplane is a type of glider aircraft used in the leisure activity and sport of gliding (also called soaring). [1] [2] 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 ...
Gliding is a recreational activity and competitive air sport [1] in which pilots fly unpowered aircraft known as gliders or sailplanes using naturally occurring currents of rising air in the atmosphere to remain airborne.
Pennycuick [1] divides animal flight into three types: parachuting, gliding and powered. He observes however that these have no sharp boundaries. For example, at one point he sees parachutes as unpowered and as a primitive form of soaring, while soaring itself he sees as being powered by air movement (wind).
Dynamic soaring is a flying technique used to gain energy by repeatedly crossing the boundary between air masses of different velocity.Such zones of wind gradient are generally found close to obstacles and close to the surface, so the technique is mainly of use to birds and operators of radio-controlled gliders, but glider pilots are sometimes able to soar dynamically in meteorological wind ...
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