Part I was excellent. Some stunning video footage. W.E. I think you will like this one. A variety of birds with great shots to study their wing patterns in flight.
wonderful just great to watch a must to see by all trikers who still have that fly like a bird dream. thank you xc i can always count on you to find some interesting example to post up. and you too ul. did anyone notice that the beads of water on the birds top wing were washing out to the tips. this will be great for discussions . if you look up the research on wing flapping it gives the example that a bird wing increases the angle of attack in the down stroke and decreases the angle of attack in the upstroke.i have always rejected that.it seems to me that in the down stroke the inboard angle is neutral and decreasing angle of attack as it washes out to the tips. that would make sense aerodynamically because you are increasing the speed and vacuum without increasing drag exponentially.the up stroke has a positive AOA with the wings drawing in for billow making great transference of speed into lift.So as i see it wings sweeping forward in a high aspect ratio increasing the speed of airflow and vacuum lift.in the upstroke more like an over sped para glider increasing the AOA transferring the speed into lift. the science observation ive seen says the opposite i just cant buy it.ill move this to the discussion page but it dosnt make sense to me that a bird would use a positive AOA in the downward flap maybe if he was landing.we know for certain that birds go to a high angle of atack when landing losing lift and speed.so the oposite has to be true to physics.
See this before it disappears too. The first of these two awesome videos got changed to "private" see the second before it is made non-public (free) on YouTube.
Here's a new link for the first video while it lasts:
Comments
Part II:
Part I was excellent. Some stunning video footage. W.E. I think you will like this one. A variety of birds with great shots to study their wing patterns in flight.
thanks ul and xc iam going to shut down i think i want to watch this on the big screen
wonderful just great to watch a must to see by all trikers who still have that fly like a bird dream. thank you xc i can always count on you to find some interesting example to post up. and you too ul. did anyone notice that the beads of water on the birds top wing were washing out to the tips. this will be great for discussions . if you look up the research on wing flapping it gives the example that a bird wing increases the angle of attack in the down stroke and decreases the angle of attack in the upstroke.i have always rejected that.it seems to me that in the down stroke the inboard angle is neutral and decreasing angle of attack as it washes out to the tips. that would make sense aerodynamically because you are increasing the speed and vacuum without increasing drag exponentially.the up stroke has a positive AOA with the wings drawing in for billow making great transference of speed into lift.So as i see it wings sweeping forward in a high aspect ratio increasing the speed of airflow and vacuum lift.in the upstroke more like an over sped para glider increasing the AOA transferring the speed into lift. the science observation ive seen says the opposite i just cant buy it.ill move this to the discussion page but it dosnt make sense to me that a bird would use a positive AOA in the downward flap maybe if he was landing.we know for certain that birds go to a high angle of atack when landing losing lift and speed.so the oposite has to be true to physics.
See this before it disappears too. The first of these two awesome videos got changed to "private" see the second before it is made non-public (free) on YouTube.
Here's a new link for the first video while it lasts: