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Eurasian Eagle Owl - Talon Pressure
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Ninox1



Joined: 13 Feb 2011
Posts: 38
Location: Sydney, Australia

PostPosted: Tue Feb 15, 2011 9:31 pm    Post subject: Reply with quote

Guys the pressure exerted by a birds talons depends entirely on how sharp they are and not on the type of bird!

The reason is because Pressure = Force /area.

If the claws are sharp there the contact area at the tip of the claw approaches zero. As the area approaches zero the pressure approaches infinity
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owlboy
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Joined: 19 Mar 2006
Posts: 1343
Location: Albany, NY, USA

PostPosted: Wed Feb 16, 2011 12:53 am    Post subject: Reply with quote

I think they are talking about the ability to grip of branch instead of the tips of the talons puncturing the prey. Both are pretty incredible.
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Ninox1



Joined: 13 Feb 2011
Posts: 38
Location: Sydney, Australia

PostPosted: Thu Mar 03, 2011 6:38 pm    Post subject: Reply with quote

I think we may be getting pressure and force confused here and quoting a bunch of meaningless numbers! By definition, pressure equals force divided by the area the force is acting on.

For example, a 1 pound force exerted along the axis of a wire rod measuring only 0.01629 inches in diameter, will produce a pressure of 1200psi on the end of the wire. I'm sure just about any birds talons could exert a force of at least 1 pound.

If you mean an owls foot can exert a force of 1200 pounds over the area of its foot (which hypothetically may be 1 square inch) when it squeezes a perch, well that really is pretty awesome! If that were true falconers would have no forearms.
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