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#2622082 - Mon Mar 19 2012 08:07 PM Restricted air space ?
Hunterisme Offline
old hand

Registered: Thu Aug 25 2011
Posts: 773
Loc: here and there in Pa
Apparently, snow geese get better wind resistance by drafting.

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#2622091 - Mon Mar 19 2012 08:22 PM Re: Restricted air space ? [Re: Hunterisme]
bad primer Offline
enthusiast

Registered: Tue Jan 11 2011
Posts: 654
Loc: SE PA
sorry, that`s not drafting................

Cooperative fluid dynamics techniques like drafting are found in nature as well. Flocks of geese and some other birds fly in a V formation because the wingtip vortices generated by the front bird will create up-wash circulations. The birds flying behind will receive lift force from these up-wash vortices. Thus other birds in the flock do not need to work as hard to achieve lift. Studies show that birds in a V formation place themselves roughly at the optimum distance predicted by simple aerodynamic theory.[6] The theory behind this is the same as the one for the wings of an airplane in general.[citation needed] However it does not work quite the same way as drafting in racing. Birds fly in a flock for better lifting force whereas the race cars stay close for less total aerodynamic drag force.

Other animals have been observed to use true drafting behavior reminiscent of auto racing or cycling. Caribbean spiny lobsters for example are known to migrate in close single-file formation "lobster trains".[7][8]
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#2622143 - Mon Mar 19 2012 09:16 PM Re: Restricted air space ? [Re: Hunterisme]
dmccoy1 Offline
Carpal \'Tunnel

Registered: Thu Nov 18 2004
Posts: 4426
Loc: Chester Co.
My eyes are going crossed starring at that pic, very cool.

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#2622145 - Mon Mar 19 2012 09:18 PM Re: Restricted air space ? [Re: Hunterisme]
great white hunter Offline
Stopped counting

Registered: Mon Jan 29 2001
Posts: 37471
Loc: greensburg
Cool! thumbs

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#2622180 - Mon Mar 19 2012 10:01 PM Re: Restricted air space ? [Re: bad primer]
jimsdad Offline
The man

Registered: Sat Oct 28 2006
Posts: 9297
Loc: Chester County, PA
I am sending this to all my goose buddies who have insisted that they fly in a V formation to impress chicks. I knew they were nerds all along.
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#2622228 - Mon Mar 19 2012 10:48 PM Re: Restricted air space ? [Re: Hunterisme]
Stonewall Offline
old hand

Registered: Mon Mar 05 2001
Posts: 989
Loc: Hawley, PA
great capture!
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#2622263 - Mon Mar 19 2012 11:10 PM Re: Restricted air space ? [Re: Hunterisme]
Hunterisme Offline
old hand

Registered: Thu Aug 25 2011
Posts: 773
Loc: here and there in Pa
I am fully aware of the V formation and aerodynamics of birds in flight, it was a play on words for the topic, but appreciated the information. A few others showing natural flight. It is amazing to me the amount of limited air space and the ability to use the space wisely.



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Vegetarian: old Indian word for lousy hunter

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#2622523 - Tue Mar 20 2012 09:47 AM Re: Restricted air space ? [Re: Hunterisme]
deluxe hunter Offline
Stopped counting

Registered: Wed Jul 18 2007
Posts: 15100
Loc: centre county
nice pics
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#2622607 - Tue Mar 20 2012 12:03 PM Re: Restricted air space ? [Re: Hunterisme]
Mus Offline
enthusiast

Registered: Sat Jun 23 2007
Posts: 677
Loc: Columbia County, PA
Nice Work, Carl! It's amazing that they don't constantly run into each other and how they can communicate as a flock with all the honking and flapping going on around them.

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