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Author Topic: How many times.....  (Read 893 times)
Hannah
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« on: January 09, 2006, 04:19:26 PM »

Hi all!  I have a question that may seem a little ridiculous but I would appreciate a true answer.  Here it is. How many times does a flying bee flap its' wings in the time it takes to blink? Thanks-Hannah Cheesy
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Finsky
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« Reply #1 on: January 09, 2006, 04:54:07 PM »

Good question!

Answer was found quite soon: http://www.physorg.com/news8616.html

Being relatively large insects, bees would be expected to beat their wings rather slowly, and to sweep them across the same wide arc as other flying bugs (whose wings cover nearly half a circle). They do neither. Their wings beat over a short arc of about 90 degrees, but ridiculously fast, at around 230 beats per second. Fruit flies, in comparison, are 80 times smaller than honeybees, but flap their wings only 200 times a second
When bees want to generate more power--for example, when they are carting around a load of nectar or pollen--they increase the arc of their wing strokes, but keep flapping at the same rate. That is also odd, Dickinson says, because "it would be much more aerodynamically efficient if they regulated not how far they flap their wings but how fast "

Another sources give about same figures  190 - 250 beat/s.
http://hypertextbook.com/facts/1999/MichelleFinnegan.shtml
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Finsky
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« Reply #2 on: January 09, 2006, 05:21:21 PM »

And here is video how bee row in the air.
http://www.newscientist.com/article.ns?id=dn8382&feedId=online-news_rss20


underlined in the text, point here 5 MB
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