Home     Contact     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS     Terms of services     Privacy policy  
 Home      Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science   

<< Back to INDEX

How Bird Wings Work [Video]
posted October 10 2012 6:12.45 by Giorgos Lazaridis

Here is the question: If birds flap their wings downwards to create an upwards force due to air pressure, how comes and they do not create an equal and opposite downwards force when their wings return to the top position? Th secret lies into the way that the feathers are arranged, which they act as an one-way valve. When the wings flap downwards, the feathers close to make a smooth and air-tight area. On the other hand, when the wings flap upwards, the feathers open and the air can flow through the space between them. Moreover, the wings are fully extended when during the downwards movement to achieve maximum area, whole during the upwards movement they are retracted and bended to minimize the resistance from the air.

What an amazing bio-mechanics

[Link: Smarter Every Day]

You might also like...

There are about 120 corpses on mount Everest - [Random Knowledge #46]

This NASA Worldwide CO2 yearly animation is part mesmerizing and part scary

TED-Ex talks about the lever

The geekiest (seriously) jokes explained [Mathematics]

Why we have two Nostrils? [Biology]

One minus One plus One... Gives an unexpected result [Maths]

Crosswalk buttons do nothing! - They are placebo buttons [Psychology]

This is how Static Electricity Kills your PC (and Chips) [Experiment]

<< Back to INDEX



  Email (shall not be published)


Notify me of new posts via email

Write your comments below:
BEFORE you post a comment:You are welcome to comment for corrections and suggestions on this page. But if you have questions please use the forum instead to post it. Thank you.


No comment yet...

Be the first to comment on this page!

 Contact     Forum     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS   

Site design: Giorgos Lazaridis
© Copyright 2008
Please read the Terms of services and the Privacy policy