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(YouTube)   Concept airship that mimics a manta ray   (youtube.com) divider line 51
    More: Cool  
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9488 clicks; posted to Video » on 06 Mar 2008 at 5:45 PM (6 years ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2008-03-06 05:26:16 PM
Very cool.
 
2008-03-06 05:39:48 PM
It feels like Jacques Cousteau should be narrating that video.
 
2008-03-06 05:44:14 PM
Oh the huge manta ray
 
2008-03-06 05:47:17 PM
Cricky!!!
 
2008-03-06 05:49:48 PM
Definitely cool.

How does it change altitude via looping like that though? I don't see any discernible exhaust or power source.
 
2008-03-06 05:50:24 PM
swirlee.org
 
2008-03-06 05:55:04 PM
Raskolnikov's Angst: Definitely cool.

How does it change altitude via looping like that though? I don't see any discernible exhaust or power source.


It maintains the same density as the air around it by using 'lighter than air' gases to offset the electronics and mechanics. A large version capable of spanning high altitudes would require a air compressor and chamber to act as ballast. The nifty engineering here is getting the device to be balanced in a way that allows for the device to do cool maneuvers as well as the 'fin' motion.

power source = batteries...
 
2008-03-06 05:55:28 PM
Trippy.

Real trippy.

Would be so-frickin-cool.
 
2008-03-06 05:58:08 PM
www.ffsynthesis.net

Not impressed.
 
2008-03-06 06:00:33 PM
Raskolnikov's Angst: Definitely cool.

How does it change altitude via looping like that though? I don't see any discernible exhaust or power source.


Assuming it's buoyancy in air is stable, it can use it's forward momentum and stick its tail up like an airplane's elevator flap (happens a few times in the video) to fly upwards.

=Smidge=
/Version 2 will be a stingray, programmed to hunt down and exterminate Terri and finish the job.
 
2008-03-06 06:01:10 PM
img145.imageshack.us
Would like a word with someone.
 
2008-03-06 06:03:48 PM
For the greater good!

/not too obscure
 
2008-03-06 06:05:05 PM
SharkUW: Raskolnikov's Angst: Definitely cool.

How does it change altitude via looping like that though? I don't see any discernible exhaust or power source.

It maintains the same density as the air around it by using 'lighter than air' gases to offset the electronics and mechanics. A large version capable of spanning high altitudes would require a air compressor and chamber to act as ballast. The nifty engineering here is getting the device to be balanced in a way that allows for the device to do cool maneuvers as well as the 'fin' motion.

power source = batteries...


Smidge204: Raskolnikov's Angst: Definitely cool.

How does it change altitude via looping like that though? I don't see any discernible exhaust or power source.

Assuming it's buoyancy in air is stable, it can use it's forward momentum and stick its tail up like an airplane's elevator flap (happens a few times in the video) to fly upwards.

=Smidge=
/Version 2 will be a stingray, programmed to hunt down and exterminate Terri and finish the job.


Thanks for that guys!

Off to read up on buoyancy and the like, it's pretty damn interesting.
 
2008-03-06 06:18:00 PM
That's damn cool. I just wonder how it would work outside in even a slight wind.
 
2008-03-06 06:20:39 PM
EvolveYouPutz: That's damn cool. I just wonder how it would work outside in even a slight wind

like a kite, a big silver flapping kite, without a string.
 
2008-03-06 06:21:01 PM
i didn't watch the whole thing. did it kill Steve Irwin at the end?
 
2008-03-06 06:27:00 PM
Old model is old.

And that's not how mantas swim.
 
2008-03-06 06:28:13 PM
I believe I am the first to say this today but:

SHOPPED.

seriously.
 
2008-03-06 06:37:26 PM
Here's (pops) the company's site. (In Spanish) 2nd page has computer flight simulation and the 3rd page has a lager format of the video.

/submitter
 
2008-03-06 06:57:02 PM
Lager format? One Stella, please.
 
2008-03-06 06:58:37 PM
I find it odd that they're designing an airship after something that does not FLY.
 
TSE
2008-03-06 07:04:25 PM
LordJiro: I find it odd that they're designing an airship after something that does not FLY.

Manta Rays fly through water. Look it up on the internets.
 
2008-03-06 07:12:42 PM
TSE: Manta Rays fly through water. Look it up on the internets.

Incorrect, they use a combination of lift- and drag- based swimming that would not work in air.
 
TSE
2008-03-06 07:20:36 PM
Farking Zardwarks: TSE: Manta Rays fly through water. Look it up on the internets.

Incorrect, they use a combination of lift- and drag- based swimming that would not work in air.


Sorry, I left my fluid dynamics at home. It flaps "wings", it moves forward. The anology is not incorrect.
 
2008-03-06 07:23:40 PM
Flight of the Navigator FTW

/loved that movie
 
2008-03-06 07:29:09 PM
Farking Zardwarks: Incorrect, they use a combination of lift- and drag- based swimming that would not work in air.

Animals that swim underwater utilize neutral buoyancy via swim bladders. Swimming humans achieve neutral buoyancy via a weight belt. This airship achieves neutral buoyancy by utilizing lighter-than-air gas. The propulsion of swimmers and fliers in this context is very similar. Forward and downward thrust keep the subject in motion. You can split hairs over this but, why not widen your scope of vision instead.

/larger
 
2008-03-06 07:31:05 PM
^dropped one of these: ?^
 
2008-03-06 07:36:31 PM
Interesting, but useless.
The dynamics in use are at a very low efficiency due to the fact that air isn't very thick/dense compared to water. The air currents are also much less organized and constant than in water.
At the same time, the required lack of rigidity creates a very low speed limit.

Proof of concept = cool
Usefulness rating = -10
 
2008-03-06 07:39:09 PM
Rufus_T_Firefly: Animals that swim underwater utilize neutral buoyancy via swim bladders.

except for elasmobranchs, which don't have swim bladders, not all osteicthyans do, either. As a matter of fact, most if not all batoids are heavier than water.

Swimming humans achieve neutral buoyancy via a weight belt. This airship achieves neutral buoyancy by utilizing lighter-than-air gas. The propulsion of swimmers and fliers in this context is very similar. Forward and downward thrust keep the subject in motion. You can split hairs over this but, why not widen your scope of vision instead.

/larger


My vision is plenty wide, and I can't argue with the fact that forward thrust and lift push flying objects through their medium. The point I'm making is that this object is not an accurate reconstruction of the way oscillatory batoids move.
 
2008-03-06 07:44:19 PM
Time to cite a cartoon show reference. This will be followed by me being lampooned for citing the reference, oh well...

i73.photobucket.com

"SILVER MANTA RAY!"

/Unimpressed with TFA

//Perhaps won't be lampooned?
 
2008-03-06 07:54:21 PM
Farking Zardwarks: oscillatory batoids

i am going to work that phrase into every conversation for the next 24 hours.
 
2008-03-06 07:56:18 PM
Farking Zardwarks: The point I'm making is that this object is not an accurate reconstruction of the way oscillatory batoids move.

That's why I chose the word "mimic". Granted, it will not pass the academician's criteria as "an accurate reconstruction..." however, to the average person who has observed both locomotions, it'll pass.
 
2008-03-06 08:45:48 PM
I understand that air is less dense than water, if you theoretically take a fish or a whale or a Steve Irwin heart stabby thing and make it light enough, it can move through the air in the same manner as it moves through the water. There is less resistance and less mass to "push" against to get where you want to go, but thats how it works. Are people arguing this?
 
2008-03-06 08:47:02 PM
Wisdomsage: Time to cite a cartoon show reference. This will be followed by me being lampooned for citing the reference, oh well...



"SILVER MANTA RAY!"

/Unimpressed with TFA

//Perhaps won't be lampooned?


I was going to mock you, but then I realized to do so I'd have to admit to knowing what that is from. And that's a relatively obscure Shen Gong Wu, since they usually have Dojo to do their flying.

...Awwwww...crap.

/Outed myself.
 
2008-03-06 08:57:09 PM
Smiths: Not impressed.

Came to post this.
 
2008-03-06 09:25:21 PM
heklim: I think it had more to do with how accurate the manta-blimp reconstructs the movement of oscillatory batoids.

Point worth considering: Computational Fluid Dynamics aren't confined to liquids. (Just ask my wife who works in the air conditioning, heating and cooling industry.)
 
2008-03-06 09:27:24 PM
wtf is this. It's an oversized balloon. That's how it's floating. The wings do nothing to keep it afloat, and they barely serve as propulsion, which a portable fan could accomplish twice as well.
This is ridiculously lame.
 
2008-03-06 09:30:36 PM
^(Just ask my wife who works in the air conditioning, heating and cooling *HVAC industry.)

*Apologies to all the Heating, Ventilation & Air Conditioning people out there!
 
2008-03-06 09:42:22 PM
it's kinda cute
 
2008-03-06 10:30:14 PM
This is great. I hope the people that are crying are trolling, for their sake.
 
2008-03-06 10:39:14 PM
I'd rather ride on one of those flying great white sharks of South Africa, but that's just me not being a dandy...
 
2008-03-06 11:25:44 PM
Looks a lot like a deltoid pumpkin seed to me.

/obscure?
 
2008-03-07 12:04:41 AM
The concepts that allow a manta ray to "fly" through water are similar to the concepts that allow very small birds and especially insects to fly in air. The behavior of air on those scales is comparable to a liquid rather than a gas. Birds and insects take advantage of viscous effects that airplanes can't due to scale, which is why their mode of flight is more like swimming through air, or flying like a manta ray. I'm drunk and rambling but I have a degree in this and I'm working on another, so yeah.
 
2008-03-07 02:56:07 AM
Aevum: Interesting, but useless.

quite to the contrary, very useful
 
2008-03-07 04:58:01 AM
It swims?

"Depth at 45 hundred feet, 48 hundred, 50 hundred! 5000 feet!"

Farnsworth: Dear Lord, that's over 150 atmospheres of pressure!

Fry: How many atmospheres can this ship withstand?

Farnsworth: Well it's a spaceship, so I'd say anywhere between zero and one.
 
2008-03-07 06:07:51 AM
Insult Comic Bishounen: Would like a word with someone.

I'll bite. What is that?
 
2008-03-07 09:43:24 AM
sweet!
In for one!
would buy again A++++++
 
cfh
2008-03-07 10:51:44 AM
i44.photobucket.com
 
2008-03-07 10:56:59 AM
Just one question: Does it leak?
 
2008-03-07 11:33:08 AM
Weren't these flying in Kotor in the skies over Dantooine?
 
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