Oh, my God, this is TOO TOO TOO cool! - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 04-25-2012, 11:57 AM   #11
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I am: Max Xu
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Re: Oh, my God, this is TOO TOO TOO cool!

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Originally Posted by LGM Graphix View Post
Actually, the physics are mostly what is going against it.

1. The wing loading would not be feasable, the largest bird in the world is a Condor (I forget what species) with a 23 foot wingspan and still only weighs 71lbs. It would take an insanely massive wing to lift a 180lb man, then add on the weight of motors that would realistically be large enough to do anything, and the number of batteries required to power them.

2. A bird can fly straight ahead because of it's tail, that's not to say you couldn't add a tail, but you'd have to be of super fitness to control your legs with some form of tail added on.

3. A birds wings can create lift due to many factors, but some of the biggest being a feather design that allows air to pass through them when they come up, as well as the wings ability to fold somewhat on the upward beat and curve to catch more air on the downward beat. The wings in the video don't articulate, the motion of the wings going up would push the person and contraption back down. An ornithopter works because of the shape of it's wing allowing for more air to be pushed on the downward beat, but look at how fast an ornithopter has to be able to move it's wings to fly. Gliding is another thing, but the take off requires the wings to beat very fast.

I'm not saying that one day it couldn't happen, but I don't think it will be with that design. Just my opinion though.

Hi Jememy,

1. The wing loading should not be a problem. We can just make the wing as large as necessary. (The video below is an extreme example.)

2. Note that this thing is mechanically-aided, therefore, don't assume the human body does everything.

3. Big Ornithopter flies!
+ "Human Powered Ornithopter Flies!" via YouTube
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.

I am with you on the point that I am also not sure if the human birdwings will fly as shown in the video.
Max Xu
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birdwings , human flying

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