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Airflow visible over the airplane wing

Specifically, what you are seeing here is a vortex which is basically a sideways tornado. Vortices occur when moving air forms a twisted stream when flowing over an object with a complicated shape. ...
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Airflow visible over the airplane wing

The airflow will be there visible or not. What makes it visible are the atmospheric conditions and moisture or humidity in the air so the water particles show the airflow. In wind tunnels the airflow ...
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How to design the thickness and diameter of a cantilever beam in bending for both composites and metals?

The equation for bending stress is $\sigma_b = \dfrac{My}{I}$ For a thin-walled circular shaft, $I = \dfrac{\pi d^3t}{8}$, $d = 2r$ (diameter) Rewrite the equation, with $y = d/2$: $\sigma_b = \dfrac{...
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Angle of attack on variable pitch propeller?

All propellers have to have a gradually increasing twist as we get closer to the hub to maintain the same angle of attack with the relative wind at that particular position. The reason is the change ...
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