tag:blogger.com,1999:blog-266108914902271629.post6297318233674453204..comments2023-09-25T08:48:48.104-07:00Comments on John Vigor's Blog: Faster under waterJohn Vigorhttp://www.blogger.com/profile/02215080385571534292noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-266108914902271629.post-40908468590226738622010-08-20T08:31:33.431-07:002010-08-20T08:31:33.431-07:00Boring scientific elaboration (so I'll keep it...Boring scientific elaboration (so I'll keep it short): Fish-like things that swim can beat their 'hull speed' (without planing) because they 'flick' the resulting vortices away from their body with every power-stroke of their tail. (A lot of 'hull' drag comes from these vortices.)<br /><br />They built a robot tuna at MIT and found out a lot about this. More <a href="http://books.google.com/books?id=hR9LzeIIV9IC&pg=PT35&lpg=PT35&dq=robot+tuna+vortices&source=bl&ots=Nvj2Wl7Eg5&sig=QGFIXRGY-wbLRvqwek_N2T3OIMQ&hl=en&ei=2J5uTM5vyIOdB5rG5bAI&sa=X&oi=book_result&ct=result&resnum=4&ved=0CCgQ6AEwAw#v=onepage&q=robot%20tuna%20vortices&f=false" rel="nofollow">here</a>.Aaron Headlyhttps://www.blogger.com/profile/08936150018996105040noreply@blogger.com