SIMULATION OF WAKE VORTEX AIRCRAFT IN GROUND EFFECT

SIMULATION OF WAKE VORTEX AIRCRAFT IN GROUND EFFECT

The problem developed in this paper is encountered in airplane aerodynamics and concernsthe influence of long life longitudinal wake vortices generated by wing tips or by external obstaclessuch as reactors or landing gears.More generally it concerns 3D bodies of finite extension in crossflow.At the edge of such obstacles, longitudinal vortices are

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Variability of water balance components in a coffee crop in Brazil

Establishing field water balances is difficult and costly, the variability of their components being the major problem to obtain reliable results.This component variability is presented herein for a coffee crop grown in the Southern Hemisphere, on a tropical soil with 10% slope.It was observed that: rainfall has billionaire boys club discount code

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A universal microscope manipulator

A modified and improved model of a mechanical manipulator for observation of pinned and mounted insects is described.This device allows movement of the observed object around three perpendicular axes in the field of vision at all magnifications of stereomicroscopes.The main improvement of this new model is positioning billionaire boys club discount

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