Jet engine microscale air quality exhaust
Plastic model kits for sale, rare and vintage airplane models, R/C, ship models and car models. Over 6000 different kits in stock. All-plastic model kits got their ...
Definition. Wind shear refers to the variation of wind over either horizontal or vertical distances. Airplane pilots generally regard significant wind shear to be a ...
First issue from 1971. Features full cockpit, detailed Jumo jet engine , pilot figure, hinged canopy and moving wheels. The kit has never been started.
Wind shear (or windshear ), sometimes referred to as wind gradient , is a difference in wind speed and/or direction over a relatively short distance in the atmosphere . Atmospheric wind shear is normally described as either vertical or horizontal wind shear. Vertical wind shear is a change in wind speed or direction with change in altitude. Horizontal wind shear is a change in wind speed with change in lateral position for a given altitude. 
Wind shear is a microscale meteorological phenomenon occurring over a very small distance, but it can be associated with mesoscale or synoptic scale weather features such as squall lines and cold fronts. It is commonly observed near microbursts and downbursts caused by thunderstorms , fronts, areas of locally higher low-level winds referred to as low level jets, near mountains , radiation inversions that occur due to clear skies and calm winds, buildings, wind turbines, and sailboats. Wind shear has significant effects on control of an aircraft effect, and it has been a sole or contributing cause of many aircraft accidents.
Wind shear is sometimes experienced by pedestrians at ground level when walking across a plaza towards a tower block and suddenly encountering a strong wind stream that is flowing around the base of the tower.
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