The Secret of the Shark: The Facets

Why a Speeding Shark is Like a Golf Ball
Sharks Raise Their Scales to Dimple Their Skin Like the Surface of a Golf Ball
By DAVID ROBSON Nov. 10, 2008
"Shortfin mako sharks can shoot through the ocean at up to 50 miles per hour (80 kilometres an hour). Now a trick that helps them to reach such speeds has been discovered - the sharks can raise their scales to create tiny wells across the surface of their skin, reducing drag like the dimples on a golf ball."





The hydo dynamic shape of the Shark is part of the reason there is very little blow back; the facets are the other reason. It is called the golf ball effect. Lead is very porous, the facets cannot be included in the original casting. They have to be pounded in with a hammer to make them perfectly smooth like a mirror. The extra benefit of the facets is of course the "magic buzz" sound signature. Down deep, there is no light; it is all about the sound

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