Maybe it is not generally known that air does not slide across surfaces but rather there is what is known as a thin boundary layer of air that can be visualized as being momentarily stuck to or momentarily detained by the surfaces of the wire mesh. Perhaps an analogy for the boundary layer would be like a large group of pranksters getting chased out of a fenced watermelon patch by a 12 gage shotgun. All clear the fence in a single leap carrying a melon but one prankster gets snagged by the barbed wire and is momentarily caught and detained just long enough to tear his pants and hide loose and then continues on. In the process, his melon gets smashed. The smashed melon represents the oil grabbing a particle of dust. The other melons escape capture.
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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