Robotic fish fins to propell submarines


	Robotic fish fins to propell submarines

JohnWaterman

7-31-2007 2:00 PM

389 views

tags:

science, technology, engineering, robotics, propulsion, fish, submarines

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/416eed1a-83ef-4961-878a-3e7c3fd18f1a/7D39E7F6-3FC6-42FB-B36A-0F362AF652CD/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://news.bbc.co.uk/1/hi/technology/6924057.stm" href="http://news.bbc.co.uk/1/hi/technology/6924057.stm" style="font-size: 11px;">news.bbc.co.uk</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/1/hi/technology/6924057.stm">The distinctive swimming technique of a bony fish is being used to develop agile, propellerless submarines.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/1/hi/technology/6924057.stm"><FONT size="2">US researchers have created prototype mechanical fins that mimic the movements of the bluegill sunfish.
</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/1/hi/technology/6924057.stm"><table background="undefined" bgcolor=""><tr><TD class="sibtbg"><DIV class="o">
                            <IMG width="203" vspace="0" hspace="0" height="152" border="0" alt="Robo-fin and bluegill sunfish (Image: Donna Coveney)" src="http://newsimg.bbc.co.uk/media/images/44030000/jpg/_44030884_fish_203b.jpg" />
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The robo-fin is based on the bluegill sunfish's movements</DIV>
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                            <IMG width="203" vspace="2" hspace="0" height="1" border="0" alt="" src="http://newsimg.bbc.co.uk/nol/shared/img/v3/inline_dashed_line.gif" />
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		<A href="http://www.bbc.co.uk/mediaselector/check/player/nol/newsid_6920000/newsid_6924700?redirect=6924753.stm&news=1&bbwm=1&bbram=1&nbram=1&nbwm=1&asb=1">
			<IMG vspace="0" height="13" border="0" align="left" alt="" src="http://newsimg.bbc.co.uk/nol/shared/img/v3/icons/video_text.gif" /><B>Robo-fin in motion</B>
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</TD></tr></table></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/1/hi/technology/6924057.stm"><FONT size="2">The robo-fins could recreate the fish's powerful forward thrust and its manoeuvrability, the Massachusetts Institute of Technology team said.
</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/1/hi/technology/6924057.stm"><FONT size="2">Further work is being carried out to see how other sunfish movements could help to improve underwater vehicles.
</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/1/hi/technology/6924057.stm"><FONT size="2">James Tangorra, a researcher at MIT's Bio-instrumentation Laboratory and a professor of mechanical engineering at Drexel University, said: "If we could produce AUVs that can hover and turn and store energy and do all the things a fish does, they'll be much better than the remotely operated vehicles we have now."
</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/1/hi/technology/6924057.stm">The bluegill sunfish</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.bbc.co.uk/1/hi/technology/6924057.stm">moves with great efficiency; its pectoral fins are able to propel it creating very little backwards thrust.</blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/7D39E7F6-3FC6-42FB-B36A-0F362AF652CD/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>