Assertion: humpback whale's flipper | /r/HasProperty | stalled at less than 12 degrees
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text: In 2004, along with engineers from the US Naval Academy and Duke University, Fish published hard data: Whereas a smooth-edged flipper stalled at less than 12 degrees, the bumpy, "scalloped" version did not stall until it was tilted more than 16 degrees - an increase of nearly 40 percent.