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Fake feathers could take the drag out of flights - tech - 13 April 2009 - New Scientist

A University of Genoa researcher believes that adding artificial feathers to flight surfaces could reduce drag and, by extension, increase fuel efficiency. He tested the concept using a simulated wind tunnel and found that adding small, stiff bristles reduced the drag of a cylinder by about 15%. Future research would focus on demonstrating this with real systems.
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The Hyper-sub is a submersible powerboat. Specifically, in surface mode it's a powerboat, but it can be made to slowly descend for sub mode. The link has a video but it only shows the craft sinking and resurfacing.  

January 2010

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