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Flapping NAV Performs Controlled Hovering Flight

An anonymous reader writes "AeroVironment, Inc. was awarded a Phase II contract extension in April from the Defense Advanced Research Projects Agency (DARPA) to design and build a flying prototype for the Nano Air Vehicle (NAV) program. As part of this program AV has accomplished a technical milestone never before achieved: the controlled hovering flight of an air vehicle system with two flapping wings (video) that carries its own energy source and uses only the flapping wings for propulsion and control. Two wings for propulsion and control, nothing else."

128 comments

  1. Ouch by Anonymous Coward · · Score: 0

    0 comments and it's already slashdotted.

    1. Re:Ouch by CorporateSuit · · Score: 2

      Well, if everyone in slashdot was like me, we all wanted to see if it flaps like a vulture or like a hummingbird before posting...

      --
      I am the richest astronaut ever to win the superbowl.
    2. Re:Ouch by dotancohen · · Score: 2, Funny

      0 comments and it's already slashdotted.

      What the hell is this? Who are all the noobs who went off to RTFA?!? Has /. been trolled?

      --
      It is dangerous to be right when the government is wrong.
    3. Re:Ouch by dotancohen · · Score: 3, Funny

      Well, if everyone in slashdot was like me, we all wanted to see if it flaps like a vulture or like a hummingbird before posting...

      European vulture, or African?

      --
      It is dangerous to be right when the government is wrong.
    4. Re:Ouch by Culture20 · · Score: 1

      Has /. been trolled?

      OMG I Love This Place Its
      So Edgy Being Anonymous

    5. Re:Ouch by Red+Flayer · · Score: 1

      European vulture, or African?

      Turkey vulture -- so somewhat Asian and somewhat European.

      But definitely unladen.

      --
      "Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
    6. Re:Ouch by Endo13 · · Score: 1

      The link to TFA works fine. It's the link to the video that's slashdotted.

      But what does all this mean?

      --
      There is no -1 Disagree mod. Slashdot.org/faq defines mod options. USE IT.
  2. Apparently... by d474 · · Score: 3, Funny

    ...their website is being served off of the flapping bird robot, and said robot has crashed.

    They can make flapping wing flying robots, but can't make a slashdot proof webserver, meh.

    --
    Authority questions you. Return the favor.
    1. Re:Apparently... by Anonymous Coward · · Score: 0
  3. Slashdotted!! by anonymousNR · · Score: 4, Informative

    here's a link to another article which atleast has a computer generated image

    --
    -- It is the mark of an educated mind to be able to entertain a thought without accepting it. -- Aristotle
    1. Re:Slashdotted!! by Anonymous Coward · · Score: 0

      Now that link is slashdotted!!

      Nathan

  4. Ornithopter by fiannaFailMan · · Score: 5, Informative

    Shouldn't this sort of thing be called an Ornithopter?

    --
    Drill baby drill - on Mars
    1. Re:Ornithopter by Anonymous Coward · · Score: 0

      /agree
      and once we know what it is called so we can google for it, what is it they are doing that requires a DARPA budget when we can buy a "$99 3-Channel Radio Controlled RC Flying Robotic Bird Cyberbird, Ready-To-Fly Ornithopter" online?

    2. Re:Ornithopter by CarpetShark · · Score: 1

      US.mil: "Those terrorists will cower before our hornicopters.. orniopters.. morningchoppers. Goddamit. Private Geek, say that word at the end of my sentences from now on."

      Nah, won't work.

    3. Re:Ornithopter by Dragonslicer · · Score: 1

      Don't you mean Ornithopter?

    4. Re:Ornithopter by Hurricane78 · · Score: 1

      Nope. As you can see, the wings flap horizontally, which means it is a completely different concept, from what birds do.

      --
      Any sufficiently advanced intelligence is indistinguishable from stupidity.
    5. Re:Ornithopter by home-electro.com · · Score: 1

      Birds that can hover flap their wing pretty much the same way. Find some videos of hummingbirds.

      http://www.youtube.com/watch?v=RJf-AQhDTz4&feature=channel

    6. Re:Ornithopter by Anonymous Coward · · Score: 0

      Hornicopters? Well yeah, the article is about fapping NAV.

    7. Re:Ornithopter by metaforest · · Score: 2, Informative

      "Nope. As you can see, the wings flap horizontally, which means it is a completely different concept, from what birds do."

      You obviously have never taken a really close look at a slow motion video of a hummingbird doing the stationkeeping thing.
      The NAV is mimicking a simplification of the hummingbird's vertical stationkeeping fight mode.

          Head, Tail and back are in a vertical orientation, (like a person standing) wings flapping in a 'sculling' motion to direct thrust downward. The wing shape is used more like a propeller blade in this mode than a lifting wing.

      If you tread water, while swimming using arm-sculling, your arms are doing a slow motion version of roughly the same motions, with corrections, and for the same reasons, to maintain balance and position. Take particular note of how the hands are used as blades and tilted to direct force down against the water.
      Our arm geometry is somewhat different so we don't orient the hand portion or our 'wing' vertically, and lacking feathers we rotate the thumb down to generate lift on the return stroke, rather than up and out as the hummingbird does.

      The only difference with the NAV is that it's wing geometry is not as complex as a hummingbird so the system cannot switch to the more efficient horizontal orientation for cruising flight, the mode most birds use commonly. Hummingbirds use this more typical flight mode when they are not hovering.

      I have witnessed some types of sparrows kind of manage the vertical flight mode, but their body's are not balanced correctly to make it very stable IMO. Consequently, they must use a lot more energy to stabilize the maneuver. This reduces their ability to hover to a matter of ten seconds or so before fatigue sets in.

      Larger birds cannot mange the vertical flight mode at all. They simply can't move their wings fast enough to generate stable raw lift when their bodies are oriented vertically. The closest they can get is a cupped wing geometry used for VTOL maneuvers, and this too uses a lot of energy and is not stable enough for hovering.

      One other variation I have seen is in small hawks where they seem to induce a low-speed stall and use small wing movements at the "wrist joint" to hold position for a few moments before committing to an attack dive. This is not a stable flight mode. After a few seconds they must either resume forward motion and normal flight, to mitigate the effects of the stall, or begin their attack dive.

    8. Re:Ornithopter by bar-agent · · Score: 1

      If you tread water, while swimming using arm-sculling, your arms are doing a slow motion version of roughly the same motions, with corrections, and for the same reasons, to maintain balance and position.

      I can't tread water, you insensitive clod!

      --
      i'd hit it so hard, if you pulled me out you'd be the king of britain [bash.org]
    9. Re:Ornithopter by metaforest · · Score: 1

      I can't tread water, you insensitive clod!

      You must be Bob.

  5. Why the hell would you do that? by iCantSpell · · Score: 1

    People can't drive cars so now we give the same people flying cars...

    1. Re:Why the hell would you do that? by dotancohen · · Score: 2, Insightful

      People can't drive cars so now we give the same people flying cars...

      Flying cars? It's a nano flying vehicle, not a nanny flying vehicle.

      --
      It is dangerous to be right when the government is wrong.
    2. Re:Why the hell would you do that? by oodaloop · · Score: 1

      Apparently, iCantSpell can't read either. It's called a Nano Air Vehicle for a reason; because it's small.

      --
      Tic-Tac-Toe, Global Thermonuclear War, and relationships all have the same winning move.
    3. Re:Why the hell would you do that? by Anonymous Coward · · Score: 0

      you meat not a ninny vehicle

    4. Re:Why the hell would you do that? by Anonymous Coward · · Score: 0

      Perhaps GP though Tata was jumping into the Aerospace industry?

      http://en.wikipedia.org/wiki/Tata_Nano

    5. Re:Why the hell would you do that? by Red+Flayer · · Score: 1

      Flying cars? It's a nano flying vehicle

      I thought it was a Nanu flying vehicle, which would be large and egg-shapped, and capable of interplanetary flight (at least one-way from the planet Ork). Last I heard there were issues with the landing sequence, though. Not sure if there's a RC, or if they're working on another public beta.

      I could have misread, though.

      --
      "Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
    6. Re:Why the hell would you do that? by Conspiracy_Of_Doves · · Score: 1

      It isn't a car. It's a tiny robot. The whole thing weighs less than 10 grams.

  6. Methinks... by kipin · · Score: 1

    They need to get one of those flapping NAV's to fan off their server and cool it down.

    --
    If I can not smoke in heaven, then I shall not go. -- Mark Twain
  7. Youtube by reg106 · · Score: 5, Informative

    Here is an AeroVironment NAV video on YouTube. Not sure if it's the same one, but it was uploaded today...

    1. Re:Youtube by Acer500 · · Score: 1

      Thanks, it's probably the same one. And pretty cool, too.

      --
      There are three kinds of lies: lies, damned lies, and statistics.
    2. Re:Youtube by bughunter · · Score: 1

      Yes, it's the same one. I viewed it on AV's site this morning before the slashdotting.

      --
      I can see the fnords!
  8. Laserbeak? by oodaloop · · Score: 1

    Where's the Laserbeak tag? Or at least Lazerbeak, depending on which geek you ask.

    --
    Tic-Tac-Toe, Global Thermonuclear War, and relationships all have the same winning move.
  9. When can I buy a ridable griffon/dragon? by seanalltogether · · Score: 3, Funny

    Dear engineering community, that's all I've ever wanted from you in life, please make it happen.

    1. Re:When can I buy a ridable griffon/dragon? by oodaloop · · Score: 1

      Well, which is it; a griffon or a dragon? There is a HUGE difference between them. Maybe you should read your Monstrous Compendium a little closer.

      --
      Tic-Tac-Toe, Global Thermonuclear War, and relationships all have the same winning move.
    2. Re:When can I buy a ridable griffon/dragon? by CorporateSuit · · Score: 3, Funny

      Sponsor a $20 Billion, tax-exempt contract for ridable, mechanical dragons/griffons that live entirely off large livestock and I'm sure you'll have them fleet-ready in 15 years (as long as PETA doesn't catch wind of it).

      --
      I am the richest astronaut ever to win the superbowl.
    3. Re:When can I buy a ridable griffon/dragon? by FlyingBishop · · Score: 1

      Well, yes, but anyone capable of engineering the one could likely engineer the other.

      Or maybe the GP meant griffon/dragon hybrid, which would be even more badass, you must admit.

    4. Re:When can I buy a ridable griffon/dragon? by camperdave · · Score: 1

      If you want an engineered dragon, you're on the wrong planet.

      --
      When our name is on the back of your car, we're behind you all the way!
    5. Re:When can I buy a ridable griffon/dragon? by azgard · · Score: 1

      Actually, dragons are much more difficult from an engineering standpoint. They are larger, live longer, have armored skin and usually a breath weapon.

    6. Re:When can I buy a ridable griffon/dragon? by Anonymous Coward · · Score: 0

      I read the subject as "When can I buy a ridable girlfriend".

      And honestly, I think that's a better question for the engineers.

    7. Re:When can I buy a ridable griffon/dragon? by FlyingBishop · · Score: 1

      Well, obviously for the most badass model. But a Komodo with wings capable of lifting a human would be just as much a dragon as a full-fledged Smaug. And a flying Komodo would be just the same engineering challenge as a griffon - putting wings on an existing ferocious animal and taming it.

    8. Re:When can I buy a ridable griffon/dragon? by Nefarious+Wheel · · Score: 1

      I'm still trying to fit a Hula Doll to my [Flying Machine].

      --
      Do not mock my vision of impractical footwear
    9. Re:When can I buy a ridable griffon/dragon? by tolgyesi · · Score: 1

      They are made by Saab: Griffin, Dragon

    10. Re:When can I buy a ridable griffon/dragon? by 3waygeek · · Score: 1

      Rideable griffins do exist -- Woz used to have one.

  10. Re:Fapping Open Sores Fan Performs Poorly by dotancohen · · Score: 0

    fap fap fap

    That's what singing meat sounds like, right?

    --
    It is dangerous to be right when the government is wrong.
  11. Clocks by the_Bionic_lemming · · Score: 3, Funny

    This just in, Prototype lost to clock with bacteria digester system.

    PETA responded with applause.

    --
    _ _ _ Go for the eyes Boo! GO FOR THE EYES!
    1. Re:Clocks by thewils · · Score: 1

      Prototype lost to clock with bacteria digester system

      Which then exploded after ingesting the high-density Lithium batteries...

      --
      Once I was a four stone apology. Now I am two separate gorillas.
  12. I thought . . . by arizwebfoot · · Score: 3, Funny

    it was pretty cool.

    There will be hummingbird looking things flying in and out of your nearest neighborhood crime syndicate office monitoring their activities.

    Who needs wiretapping now?

    Oh, and I think hummingbirds have prior art.

    --
    Beer is proof that God loves us and wants us to be happy.
    1. Re:I thought . . . by EricTheO · · Score: 1

      I thought that in one of the video's it looked much like a Seahorse.

      --
      -Eric
  13. BzZzZzz by Anonymous Coward · · Score: 0

    BzZzZzzzZZzZz...

  14. Never before achieved? by fahrbot-bot · · Score: 1, Interesting

    As part of this program AV has accomplished a technical milestone never before achieved: the controlled hovering flight of an air vehicle system with two flapping wings that carries its own energy source and uses only the flapping wings for propulsion and control.

    By man or something man-made perhaps. Now if you'll excuse me, my Hummingbird is bored...

    --
    It must have been something you assimilated. . . .
  15. wind gusts by Red+Flayer · · Score: 1
    FTA, emphasis mine:

    "The goals of the NAV program -- namely to develop an approximately 10 gram aircraft that can hover for extended periods, can fly at forward speeds up to 10 meters per second, can withstand 2.5 meter per second wind gusts, can operate inside buildings, and have up to a kilometer command and control range -- will stretch our understanding of flight at these small sizes and require novel technology development." 2.5 m/s wind gust == ~5.6 mph wind gust. For outdoor use, that seems like a pretty low threshold -- so the requirement that it "can operate inside buildings" seems to be the more of the primary use.

    That's a tall order, though, for something under 10 grams. I wonder if it's necessary to have an active system to respond to wind gusts and auto-stabilize the flight, or if it's be possible via aerodynamics alone.

    --
    "Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
  16. Advantages vs. traditional rotating wing? by dfay · · Score: 4, Interesting

    To any familiar with this company or this line of research in general:

    What are the advantages of the ornithopter design over a traditional helicopter design? Why is DARPA interested?

    Yes, I did read the article... and I understand what DARPA is interested in getting out of a small UAV that can hover. What I don't understand is why a normal helicopter design couldn't suit all of these needs better and cheaper.

    Regardless of the answer, it's a very cool project. Obviously very worthwhile just from the point-of-view of the scientific and engineering advances.

    1. Re:Advantages vs. traditional rotating wing? by Red+Flayer · · Score: 0

      Yes, I did read the article... and I understand what DARPA is interested in getting out of a small UAV that can hover. What I don't understand is why a normal helicopter design couldn't suit all of these needs better and cheaper.

      Because a helicopter design is not as easily mistaken for a flying insect?

      Because helicopter designs are fundamentally flawed at a small scale due to the physics of vortexes? And that eventually they will want the design to be even smaller?

      And , most importnntly, because the secret aliens who have infiltrated the ranks of our future enemies find it easier to detect abnormal air flow from a helicopter design than from a flapping wing design.

      --
      "Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
    2. Re:Advantages vs. traditional rotating wing? by Dynedain · · Score: 3, Interesting

      Helicopters are LOUD

      Winged vehicles can glide (among other things) making them far more stealthy in small forms.

      --
      I'm out of my mind right now, but feel free to leave a message.....
    3. Re:Advantages vs. traditional rotating wing? by fahrbot-bot · · Score: 0

      What I don't understand is why a normal helicopter design couldn't suit all of these needs better and cheaper.

      I imagine it has to do with potential mechanical problems in feathering or hinging the blades as the scale gets really small. A speck of sand could muck things up quite nicely.

      --
      It must have been something you assimilated. . . .
    4. Re:Advantages vs. traditional rotating wing? by s7726 · · Score: 0

      Nature has a tendency to self optimize over time, i think that walking fish guy might have invented the idea. I believe winged flight is more efficient than what we have been able to achieve prior to this point. I could be wrong.

    5. Re:Advantages vs. traditional rotating wing? by Anonymous Coward · · Score: 0

      What I don't understand is why a normal helicopter design couldn't suit all of these needs better and cheaper.

      I'm just going to quote the Ornithopter article on wikipedia:

      Unlike airplanes and helicopters, the driving airfoils of the ornithopter have a flapping or oscillating motion, instead of rotary. As with helicopters, the wings usually have a combined function of providing both lift and thrust. Theoretically, the flapping wing can be set to zero angle of attack on the upstroke, so it passes easily through the air. Since typically the flapping airfoils produce both lift and thrust, drag-inducing structures are minimized. These two advantages potentially allow a high degree of efficiency.

      Sounds logical; I've seen some very large dragonflys; that are both faster, more agile, and probably more efficient than similarily sized remote control helicopters. But that is pretty apples:oranges; I guess the better comparison would be a remote controlled dragonfly or the more ideal, but far less attainable, comparison: a biological helicopter.

       
       

      Hmm... yes, a biological helicopter indeed. To the laboratory, Igor!

    6. Re:Advantages vs. traditional rotating wing? by Anonymous Coward · · Score: 0

      I think one of the downsides to a helictoper is that you have to counteract the rotational force of the rotors; an Ornithopter might be less complicated to control/less prone to catastrophic failure if something happens to the tail rotor or its control linkages. (Plus less weight by not having those components?)

    7. Re:Advantages vs. traditional rotating wing? by element-o.p. · · Score: 1

      ...or the more ideal, but far less attainable, comparison: a biological helicopter

      I'm not one to throw out the word "impossible" very quickly, since people who have used that word have been proven wrong so many times in the past. However, I read an argument back in...Jr. High?...that claimed that a truly rotational structure on a biological organism was at the very least highly improbable. There aren't biological structures that can rotate infinitely, because biological mechanisms require plumbing (blood, etc.) and muscle attach points on both halves of the rotating structure.

      Think of it this way: how do you pump nutrients and return wastes from the rotor shaft and the blades? If you have the shaft sitting in a pool of mixed nutrients and wastes, you have an extremely inefficient circulatory system (due to the mixing), which I think wouldn't work well with the power requirements of a flying organism. Then, how do you attach muscles to the rotor shaft to spin the blades without having muscles that are infinitely long? Even owls' heads only rotate a finite distance -- they can't rotate like the girl's head in "The Exorcist"

      About the only way I can see to have a biological helicopter would be to have a pair of symbiotes -- one being the body of the "helicopter" and the other being the rotor shaft and rotor blades. The two organisms nest together so the rotor organism spins on top of the body organism, and the body organism continuously grabs, spins and releases the shaft of the rotor organism.

      --
      MCSE? No, sir...I don't do Windows. Yes, I am an idealist. What's your point?
    8. Re:Advantages vs. traditional rotating wing? by element-o.p. · · Score: 1

      Countering the rotational force of the rotors isn't that difficult. I used to have a free-flight model helicopter which used the rotational force of the rotors to provide additional lift. A standard model airplane propeller was attached to the crankshaft of the engine as in a normal model airplane. The base of the engine was mounted to a set of larger propeller blades, like you would typically find on a helicopter. As the engine rotated the model airplane propeller, the reaction of that force rotated the second, larger set blades in the opposite direction. The end result was a counter-rotating propeller design which allowed almost all of the energy from the engine to provide lift for the helicopter (minus some loss due to heat and friction). While this might be a little difficult to implement in a fully-functional helicopter powered by an internal combustion engine (how do you plumb the fuel supply lines?), it would probably be trivial to implement in a small electric engine-powered design.

      --
      MCSE? No, sir...I don't do Windows. Yes, I am an idealist. What's your point?
    9. Re:Advantages vs. traditional rotating wing? by Anonymous Coward · · Score: 0

      There are some energy technologies that have a fast recharge/discharge cycle. Most batteries are based on a continuous discharge cycle and are optimized to deliver relatively low power for a relatively long time. There are some newer technologies that are not battery based (at least not directly) that allows a fast discharge and a "rest" period (a second or so) where the capacitor can recharge. This recharge can be effected through chemical/biological processes that would normally be too slow to use as a traditional battery.. However, couple this high discharge rate with a slow but very long lasting power source (amazing how much energy is in a teaspoon of sugar) and then add a propulsion technology that's compatible with those power sources (e.g., a "flapping wing") and you can create a bird that stays aloft for hours at a time. Add a low-wattage transmitter (backed by a traditional battery) and you have an effective surveillance system.

      But I'm just saying...

      Wow.. Did you see all those little birds flying around recently?

    10. Re:Advantages vs. traditional rotating wing? by evilviper · · Score: 2, Insightful

      There aren't biological structures that can rotate infinitely, because biological mechanisms require plumbing (blood, etc.) and muscle attach points on both halves of the rotating structure.

      You need to take a good long look at your own shoulders...

      No, not really a free-rotating structure, but more than close enough to be re-purposed into driving a rotor or propeller.

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      Slashdot gets worse every day... Pipedot: News for nerds, without the corporate slant
    11. Re:Advantages vs. traditional rotating wing? by UncleTogie · · Score: 2, Insightful

      I'm not one to throw out the word "impossible" very quickly, since people who have used that word have been proven wrong so many times in the past. However, I read an argument back in...Jr. High?...that claimed that a truly rotational structure on a biological organism was at the very least highly improbable. There aren't biological structures that can rotate infinitely, because biological mechanisms require plumbing (blood, etc.) and muscle attach points on both halves of the rotating structure.

      How far down the size scale are you looking?

      Take a peek at this and see if it's what you're thinking of.

      --
      Don't tell me to get a life. I'm a gamer; I have LOTS of lives!
    12. Re:Advantages vs. traditional rotating wing? by Anonymous Coward · · Score: 0

      Bacteria have tiny electric motors to drive their flagella

      That just blew my mind a little bit.

    13. Re:Advantages vs. traditional rotating wing? by ckhorne · · Score: 1

      Take a look at the wikipedia article on flagellum, used by bacteria and sperm, among others, for locomotion: http://en.wikipedia.org/wiki/Flagellum

      "The bacterial flagellum is driven by a rotary engine made up of protein (Mot complex), located at the flagellum's anchor point on the inner cell membrane. The engine is powered by proton motive force, i.e., by the flow of protons (hydrogen ions) across the bacterial cell membrane due to a concentration gradient set up by the cell's metabolism (in Vibrio species there are two kinds of flagella, lateral and polar, and some are driven by a sodium ion pump rather than a proton pump[17]). The rotor transports protons across the membrane, and is turned in the process. The rotor alone can operate at 6,000 to 17,000 rpm, but with the flagellar filament attached usually only reaches 200 to 1000 rpm."

      While still a stretch from a helicopter, the ability to rotate does exist in the biological world, and at speeds that would be required. The design is even similar to current motor designs.

    14. Re:Advantages vs. traditional rotating wing? by element-o.p. · · Score: 1

      Did you take a look at how the shoulder works? Attach an airfoil to your arm notice that at some point during the "rotation" the rotor blade will shift from aligned with the relative wind to perpendicular to the relative wind. Not terribly efficient for generating lift...certainly not "close enough to be repurposed."

      --
      MCSE? No, sir...I don't do Windows. Yes, I am an idealist. What's your point?
    15. Re:Advantages vs. traditional rotating wing? by element-o.p. · · Score: 1

      Nope.

      See the explanation I gave to EvilViper for why not. Or, do like I did and simulate a flagellum by attaching a post-it note to a cat-5 cable. Notice what happens to the airflow across the rotor blade as the cat-5 cable "rotates" in your hand. It has to be a truly spinning structure to work, and the flagellum isn't close enough.

      --
      MCSE? No, sir...I don't do Windows. Yes, I am an idealist. What's your point?
    16. Re:Advantages vs. traditional rotating wing? by element-o.p. · · Score: 1

      You are the third person to suggest this, but it won't work for an airfoil. I've already explained why in replies to my original post; jump up to parent and follow the threads for the full explanation, but for the short version, try it using an ethernet cable, power cord, iPhone cable, etc. to simulate the flagellum and with a post-it note to simulate the rotor blade and see what happens to the airflow across the "rotor" at various points in the "rotation."

      --
      MCSE? No, sir...I don't do Windows. Yes, I am an idealist. What's your point?
    17. Re:Advantages vs. traditional rotating wing? by Anonymous Coward · · Score: 0

      You are the third person to suggest this, but it won't work for an airfoil.

      And that is the third time you failed to notice that many bacterial flagella are powered by true rotational motors. Their motion cannot be simulated by an ethernet cable unless it is unplugged and rotated rather than swung around.

    18. Re:Advantages vs. traditional rotating wing? by socceroos · · Score: 2, Insightful

      Yeah, with that wing span it has more chance of winning the lottery than gliding...

    19. Re:Advantages vs. traditional rotating wing? by John+Hasler · · Score: 1

      The rotor would have to change shape as it turned to compensate for the effect you describe. Doable, but flapping seems more practical.

      --
      Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
    20. Re:Advantages vs. traditional rotating wing? by Anonymous Coward · · Score: 0

      helicopters of this size are in fact not loud, not in the sense of the helicopters we all know and love. $50 and a trip to radio shack will show you that.

      rotary wings get less and less efficient when the diameter of the rotor gets small, and flapping wings get much better at that size.

      one of the things that happens is flapping wings create vortexes on some of the strokes which helps increase the pressure differential that's keeping them airborne.

    21. Re:Advantages vs. traditional rotating wing? by John+Hasler · · Score: 1

      > About the only way I can see to have a biological helicopter would be to have a pair of
      > symbiotes -- one being the body of the "helicopter" and the other being the rotor shaft
      > and rotor blades.

      Clever!

      > The two organisms nest together so the rotor organism spins on top of the body organism,
      > and the body organism continuously grabs, spins and releases the shaft of the rotor
      > organism.

      The airframe could drive the rotor with a wavemotor mechanism and feed it predigested nutrients through the driveshaft the same way oil is fed through a crankshaft. The rotor would expel waste through its tips (messy!). The two could communicate acoustically.

      Alternatively the rotating part could simply not be alive. It would develop like an antler and when mature dry into a hard structure. The connection to the body at the shaft would wither and the rotor would become free to spin when drive by the motor mechanism.

      --
      Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
    22. Re:Advantages vs. traditional rotating wing? by evilviper · · Score: 1

      Attach an airfoil to your arm notice that at some point during the "rotation" the rotor blade will shift from aligned with the relative wind to perpendicular to the relative wind.

      Helicopter rotor blades need to be able to change pitch anyways. Easy to adjust pitch to correct this minor issue.

      --
      Slashdot gets worse every day... Pipedot: News for nerds, without the corporate slant
    23. Re:Advantages vs. traditional rotating wing? by metaforest · · Score: 1

      "I'm not one to throw out the word "impossible" very quickly, since people who have used that word have been proven wrong so many times in the past. However, I read an argument back in...Jr. High?...that claimed that a truly rotational structure on a biological organism was at the very least highly improbable. There aren't biological structures that can rotate infinitely, because biological mechanisms require plumbing (blood, etc.) and muscle attach points on both halves of the rotating structure. "

      I beg to differ. Mother Nature figured this one out billions of years ago with the Flagellum motor.

      http://en.wikipedia.org/wiki/Flagellum

    24. Re:Advantages vs. traditional rotating wing? by element-o.p. · · Score: 1

      Alternatively the rotating part could simply not be alive.

      That's actually a pretty good idea... :)

      --
      MCSE? No, sir...I don't do Windows. Yes, I am an idealist. What's your point?
    25. Re:Advantages vs. traditional rotating wing? by element-o.p. · · Score: 1

      Okay...now you are rotating the blade through 360 degrees rather than the rotor shaft. Same problem -- you've just moved it to a new location.

      --
      MCSE? No, sir...I don't do Windows. Yes, I am an idealist. What's your point?
    26. Re:Advantages vs. traditional rotating wing? by evilviper · · Score: 1

      Okay...now you are rotating the blade through 360 degrees rather than the rotor shaft.

      No, 180 degrees at the most. Much easier.

      --
      Slashdot gets worse every day... Pipedot: News for nerds, without the corporate slant
  17. Your Federal Tax Dollars At Work by Anonymous Coward · · Score: 0

    for war instead of health care.

    Yours In Socialism,
    Kilgore Trout

  18. Re:wind gusts (argh... formatting) by Red+Flayer · · Score: 1
    Should have read:

    FTA, emphasis mine:

    "The goals of the NAV program -- namely to develop an approximately 10 gram aircraft that can hover for extended periods, can fly at forward speeds up to 10 meters per second, can withstand 2.5 meter per second wind gusts, can operate inside buildings, and have up to a kilometer command and control range -- will stretch our understanding of flight at these small sizes and require novel technology development." 2.5 m/s wind gust == ~5.6 mph wind gust. For outdoor use, that seems like a pretty low threshold -- so the requirement that it "can operate inside buildings" seems to be the more of the primary use.

    That's a tall order, though, for something under 10 grams. I wonder if it's necessary to have an active system to respond to wind gusts and auto-stabilize the flight, or if it's be possible via aerodynamics alone.

    --
    "Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
  19. I'm confused by AdamWeeden · · Score: 1, Funny

    What does this have to do with Norton Anti-Virus?

    --
    I was quoted out of context in my autobiography...
    1. Re:I'm confused by The+name+is+Dave.+Ja · · Score: 1

      ... and "Flapping" is pretty serious. Guy must really hate it.

    2. Re:I'm confused by Anonymous Coward · · Score: 0

      Well obviously.... it's just another platform that Norton fails to detect a virus on.

  20. Re:wind gusts (argh... formatting) by oodaloop · · Score: 2, Interesting

    The part that got me was 10 meters per second. That seems pretty damn fast to me for something that small that beats its wings.

    --
    Tic-Tac-Toe, Global Thermonuclear War, and relationships all have the same winning move.
  21. Real original by Locke2005 · · Score: 1

    Pity nobody has thought of this before

    --
    I've abandoned my search for truth; now I'm just looking for some useful delusions.
    1. Re:Real original by Anonymous Coward · · Score: 0

      No kidding this is stupid considering they could have just taken the UTIAS Ornithopter No.1, a manned ornithopter with a 41ft foot wingspan that can fly for 14 seconds (with the assistance of a turbine engine) and shrunk it down to apply it to something with a half a foot wingspan, unmanned, can hover and can't use any assistance besides the flapping. I hate it when people pretend like they are doing ground breaking research into something new, when someone else has already done something bigger, with different constraints, goals and a vague similarity.

    2. Re:Real original by amicusNYCL · · Score: 1

      It should be readily apparent that there's a massive difference between a manned aircraft and a 10g robot. It's not about "thinking of it before", DARPA isn't sponsoring a competition to see who can think of an ornithopter first. It's about execution.

      --
      "Our two-party system is like a bowl of shit looking at itself in a mirror." - Lewis Black
    3. Re:Real original by Locke2005 · · Score: 1

      Toys are a lot easier to build than manned aircraft. It is widely believed that Galileo built working toy ornithopters that could fly around the room 500 years ago (granted, they probably could not hover).

      --
      I've abandoned my search for truth; now I'm just looking for some useful delusions.
    4. Re:Real original by amicusNYCL · · Score: 1

      Either you're completely missing the point or you're just trolling. I doubt that Galileo's "toy" was capable of controlled flight, let alone hovering. This isn't about building a toy that you sit on a charger for 15 minutes so that you can fly it around for 5. This is about building a robot that can travel at 10m/s and be controlled from a range of 1km.

      The goals of the NAV program -- namely to develop an approximately 10 gram aircraft that can hover for extended periods, can fly at forward speeds up to 10 meters per second, can withstand 2.5 meter per second wind gusts, can operate inside buildings, and have up to a kilometer command and control range -- will stretch our understanding of flight at these small sizes and require novel technology development.

      Does that sound like something that Galileo built 500 years ago? Does that sound like a manned aircraft? Note that the requirements don't say anything about the method of propulsion or control.

      The NAV program was initiated by DARPA to develop a new class of air vehicles capable of indoor and outdoor operation. Employing biological mimicry at an extremely small scale this unconventional aircraft is designed to provide new military reconnaissance capabilities in urban environments.

      Does that sound like any "toy" that you've seen available?

      "From the first day of the Phase I effort, we knew that our biggest challenge would be to develop a viable propulsion system, followed by the extreme challenge of creating a control system for such complex operation at such a small scale," said Matt Keennon, AV's project manager and principal investigator on the NAV project. "Both systems were extremely difficult to conceive and required an intense combination of creative, scientific, and artistic problem-solving skills from several key team members."

      If you think you can build a better toy than these guys, what's stopping you? They just got awarded $2.1 million by DARPA to continue R&D. If you think the goals of this program are 1) to think of an ornithopter and 2) to build a toy, go right ahead.

      --
      "Our two-party system is like a bowl of shit looking at itself in a mirror." - Lewis Black
  22. So now all they need is flying brooms by Anonymous Coward · · Score: 1, Insightful

    and DARPA can play Quidditch.

  23. For those with tinfoil hats... when does it become by davidsyes · · Score: 1

    Illegal to shoot birds and insects on sight? We have in some cities ordinances stating "DON'T FEED THE BIRDS/PIGEONS" due to trying to control vermin and bird droppings in public venues.

    But, suppose building owners or overreacting individuals decide to "malathion" a bird they think is a spy vehicle?

    Well, one way to deal with these things is to put sticky glue traps (mean to cat rodents) all over the place. Or, periodically "mist" the air with soap or sticky/bubbly shit to down them. Or, where there may be perches, set up IR lasing beams to jam them (-- if you can figure out the ops/coms freqs) or IR lasing or kill them when they land or get too close. Surely, they'll be landed for energy conservation reasons.

    Or, set up mirrors in the buildings so they crash into them or get stuck and the operators cannot figure the way out. When they get too close to vortavacs, suck their asses into a disposal chute.

    Diabolical, or what?

    --
    Previously: "Linux... Toward the Sunrise..." Now: "Linux... Toward the-- No, now, part of Every Sunrise"
  24. Two wings only? by sabt-pestnu · · Score: 1

    > Two wings for propulsion and control, nothing else.
    (emphasis mine)

    Even hummingbirds have tails. A bee might be a better example, but they have four wings, as do butterflies.

    1. Re:Two wings only? by HiThere · · Score: 1

      While bees and wasps do, indeed, have four wings, two pair are joined rather inseparably. For all significant purposes that's a single pair of wings with a dual control joint at the body.

      Flies, however, do only have a single pair of wings. But the remnants of the other pair have become ... I think they call them halters ... which vibrate while the fly's flying to act as tiny gyroscopes. (I've never investigated the physics, which sounds rather improbable, but that's what I was told.)

      This is probably more on the bee or wasp model, as I suspect that they've got a bunch of leverage on just how the wing is oriented.

      Then there are grasshoppers. I don't know precisely how they fly, but as I understand it one of their pairs of wings has been turned into a sheath for their other wings, so when flying they are only using one pair of wings, but they have the other pair ridgidly extended. OTOH, grasshoppers always seem reluctant to fly, so that might not be such a good model anyway.

      --

      I think we've pushed this "anyone can grow up to be president" thing too far.
    2. Re:Two wings only? by John+Hasler · · Score: 1

      > But the remnants of the other pair have become ... I think they call them halters ...
      > which vibrate while the fly's flying to act as tiny gyroscopes. (I've never investigated
      > the physics, which sounds rather improbable, but that's what I was told.)

      Vibrating rods can serve as gyroscopes of a sort. It's how MEMS gyros work.

      --
      Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
    3. Re:Two wings only? by home-electro.com · · Score: 1

      mosquitoes?

  25. Re:wind gusts (argh... formatting) by Chris+Burke · · Score: 1

    That's about 22 miles per hour, or a little slower than a hummingbird. Which is indeed pretty impressive.

    --

    The enemies of Democracy are
  26. Crowbar by Anonymous Coward · · Score: 0

    Does anyone else have the nagging urge to whack that thing across the room with a crowbar?

    1. Re:Crowbar by KylePflug · · Score: 1

      That's what I was thinking the entire time.

    2. Re:Crowbar by gyrogeerloose · · Score: 1

      I was thinking Louisville Slugger myself.

      --
      This ain't rocket surgery.
  27. WowWee's Bat and Dragon also hover on wings. by Animats · · Score: 4, Interesting

    This is almost as good as WowWee's Bat and Dragon. They're little, they fly with moving wings, and they can hover. $39.99. Available wherever toys are sold. That's the entry-level product; the next step up, the Green Dragonfly, is an indoor/outdoor R/C ornithopter capable of hovering.

    Those models doesn't have any onboard intelligence, but some of the other WowWee flying machines have collision avoidance. WowWee has a whole line of flying and robotic toys, and they deliver impressive technology at prices well under $100. Maybe DARPA should outsource.

    1. Re:WowWee's Bat and Dragon also hover on wings. by bughunter · · Score: 2, Informative

      "Almost as good?" Hardly. The WowWee toys fly with moving wings, yes, but they're more glider than ornithopter, and require a rudder. The Aerovironment NAV is a true ornithopter, the flapping movement of its wings provides all lift and thrust and 3-axis control. But because this is slashdot, you're excused for opining out of ignorance, even when it could be cured by RTFA.

      --
      I can see the fnords!
    2. Re:WowWee's Bat and Dragon also hover on wings. by Anonymous Coward · · Score: 0

      Maybe DARPA should outsource.

      DARPA does outsource. WowWee should have bid.

    3. Re:WowWee's Bat and Dragon also hover on wings. by serutan · · Score: 1

      Wow! Thanks for posting that. I had no idea this type of toy was available, and so cheap. You solved an upcoming birthday dilemma for me!

    4. Re:WowWee's Bat and Dragon also hover on wings. by Hurricane78 · · Score: 1

      There is a w too much in your link. The site is called "wowee.com". "wowwee.com" is a scam / domain squatter site.

      --
      Any sufficiently advanced intelligence is indistinguishable from stupidity.
    5. Re:WowWee's Bat and Dragon also hover on wings. by Hurricane78 · · Score: 1

      Wait, I'm wrong too. Somehow your link took me to a scam site for no reason. Damn, I hope I don't have a man-in-the-middle! That would be very bad.

      --
      Any sufficiently advanced intelligence is indistinguishable from stupidity.
    6. Re:WowWee's Bat and Dragon also hover on wings. by Hurricane78 · · Score: 1

      Oh, I get it. This scam-site is a NetworkSolutions site. Apparently they intercept some sites, and show ads in-between them. There is a link on the scam site, taking me to this "explanation": http://js.kolmic.com/underconstructionnotice.php?d=Wowwee.com

      I just now got to that site from WowWee's OWN link on its OWN page, linking to THE SAME domain. WTF?
      What a bunch of asshats (NetworkSolutions)!

      --
      Any sufficiently advanced intelligence is indistinguishable from stupidity.
  28. Re:wind gusts (argh... formatting) by Red+Flayer · · Score: 1

    There are commercial helicopter-design UAVs weighing 15g that achieve that... about the size of a pack of cigarettes.

    So this would be competitive with that in terms of speed.

    Given that there are natural flapping-wing "designs" that achieve 25 M/s at a weight of 2.5 g (some hummingbirds), there's no reason why we shouldn't set a goal of 10 M/s at 10 g.

    --
    "Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
  29. LD by fulldecent · · Score: 1

    >> Flapping NAV Performs Controlled Hovering Flight

    da Vinci... is that you?

    --

    -- I was raised on the command line, bitch

  30. Re:wind gusts (argh... formatting)(2x argh...typo) by Red+Flayer · · Score: 1

    What's up with my stupid typos today?

    That should be 15 M/s at a weight of 2.5 g.

    --
    "Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
  31. Re:wind gusts (argh... formatting) by maxume · · Score: 2, Insightful

    It depends on what withstand means. I've watched lots of dragonflies (and other insects) fly around in stronger winds than that, gusts too. If they mean stay in the air and mostly on course, it should at least be possible, if they mean stay in one place, probably not.

    --
    Nerd rage is the funniest rage.
  32. Re:wind gusts (argh... formatting) by __aasqbs9791 · · Score: 1

    Actually compared to the small helicopters that I've tried, being able to fly in 5 mph wind would be quite nice. These things get seriously screwed up with a very slight breeze (I'm guessing well under 5 mph, though I'm not certain). The air coming out of my heater vent near the ceiling nearly crashes it from across the room, where I can't even feel the air anymore.

  33. Star Wars by Cyner · · Score: 1

    Perhaps developments like this were the reason the Star Wars Program was miniaturized. Protecting us from "mosquitos" sure sounds like a good cover story.

    --
    FreeBSD.org - The power to serve
  34. Perhaps this will clarify by NotPeteMcCabe · · Score: 1

    African or European vulture? You have to know these things when you're King.

    1. Re:Perhaps this will clarify by Anonymous Coward · · Score: 0

      Ni, just the difference between African swallow and a European swallow in a steep dive.

  35. Re:wind gusts (argh... formatting)(2x argh...typo) by OeLeWaPpErKe · · Score: 2, Interesting

    Still it's quite impressive what they have today. "Withstand 2.5 m/s wind gusts" does not mean their ornithopter explodes if the wind exceeds that. It just means that above 2.5 m/s it will have to "go with the flow", and thus will lose a part of it's mobility. It can still control it's speed in 3 other directions though.

    I have the impression that birds regularly hit this limit. They try to go against the wind, and it proves too much for them. They simply land and try again 5 seconds later, which usually succeeds.

    So the 2.5 m/s wind limit could be quite acceptable, even for outdoor flight. Assuming it can land like a bird (ie. everywhere).

    I do see one big problem these devices will have to contend with : Cats (perhaps not the lolcat variant, the regular one). So if you want to secure your house from these spying devices ... buy a cat. Birds, after 3 million years of evolution still haven't quite figured out how to protect themselves against cats, so it seems unlikely these guys will find it in the next month.

  36. mirror by Anonymous Coward · · Score: 0

    > ...their website is being served off of the fapping bird robot, and said robot has crashed.

    Fortunately, youtube is crash proof:
    http://www.youtube.com/watch?v=Cov7-XWUa18

  37. Yet another way to deal with them by Anonymous Coward · · Score: 0

    Take up falconry.

  38. Re:wind gusts (argh... formatting) by Anonymous Coward · · Score: 0

    Last I heard, dragonflies can dart up to 70MPH. And they weigh prettly close to nothing. Not sure how fast they can go sustained though.

  39. Rename something = funding by Anenome · · Score: 1

    The first rule of getting funding: Create a new name for something

    It's not a border 'fence', it's a 'migration denial system' :P Fences cost nickels and dimes, but 'migration denial systems' cost -billions-.

    We have the same problem in the AI industry. 'AI' is always something in the future, something unobtainable, and actual intelligence systems in use end up being called something else entirely. People used to say if you could make a system that beats humans in chess that would be 'AI', but we have that and it's clearly not. But the reason is that our assumption of what it would take to beat a human at chess was wrong in the first place.

    When true (humanoid soldier-replacement) battlefield robots come along, they won't be called mere 'robots', and they certainly won't be 'terminators'; they'll be something like 'Autonomous Infantry Units' or some clever acronym that spells out 'R.O.B.O.T.', perhaps "R-O-ving B-attlefield aut-O-nomous... T-erminator?' ...Okay, I just had to slip 'Terminator' in there somewhere :P Couldn't think of a T-word.

    I dunno, the military regularly comes up with some pretty clever acronyms from projects and products--one begins to think they must have paid consultants who managed to leverage a lifetime of crossword-puzzle experience into a military career making up these things, sitting around a desk somewhere staring at some name and cramming relevant adjective/noun combos at it.

    The continued focus on robotic and autonomous systems is part and symptom of a larger demographic shift happening worldwide, and increasing in scale: declining population and its effects (not to mention the political cost of soldier's lives being lost).

    Overpopulation is a non-issue. All population growth will halt and decline in the future and begin to shrink in time, bringing new problems to societies and demanding new solutions. I think the best way to answer that challenge is to solve the Artificial Intelligence problem in the next 20 years and use machine-intelligence equal to our own to address labor shortages before populations decline so much that it puts massive hurt on our economies. This will make things like menial labor and grunt-work possible for robots to do for us (until they're sophisticated enough to do more important thinking jobs). Then soldiers also can be augmented by robot groups, making defense less costly in human lives.

    This inevitably trickles down into society. We will have robotic maids and caretakers whom can actually hold a human-like conversation and understand you, as well as automatically check your vitals and alert emergency services (will be desperately needed when the baby boomers retire en masse in about 2020). We will have police officers backed up by a host of eyes-on robots and support systems (and possibly impenetrable exoskeletons, woo!). We'll have cars that can drive those no longer capable of driving safely, cook their food, clean up their houses, etc. Japan is on the forefront of these robotic technologies, and may even be ahead of us in some areas. Japan is very culturally friendly to the concept, first of all. They would love nothing more than to have robotic pets and workers. And they're also facing a worse demographic shift in population than we are (also true for other 1st world countries compared to America, eg: much of Europe).

    For that reason, I applaud this work. Who knows what future applications are possible. One day there may be NAV's kept in reserve in neighborhoods across America, like bird-houses for tiny robtos--only seconds away when someone dials 911. Emergency services will have eyes on-scene almost instantly. This will also improve police-work and crime-prevention.

    And, yes, my scifi novel incorporating some of these ideas (and much more) is in fact currently in the works :)

    --
    "I Don't Have Enough Faith to be an Atheist"
  40. Not working like birds, but worse? by Hurricane78 · · Score: 1

    I wonder, why the "wings" flap horizontally instead of vertically. Looks like except for the flapping part, it has nothing to do with how birds fly, but instead is just using uplift like traditional plane wings, but moves the wings quickly trough air for an added effect. This thing could not glide for example.

    --
    Any sufficiently advanced intelligence is indistinguishable from stupidity.
    1. Re:Not working like birds, but worse? by LakeSolon · · Score: 1

      You sir, seem like someone who would benefit from viewing a hi-speed video of a hummingbird hovering...

      http://www.youtube.com/watch?v=l3XT6qoNMMQ

  41. Re:wind gusts (argh... formatting)(2x argh...typo) by douji · · Score: 1

    tazers.

  42. Hmm by Anonymous Coward · · Score: 0

    This thing + tiny video camera = free amateur porn!