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Disney Launches Fireworks With Compressed Air

rtphokie writes "When Disney debuted its new firework show at Disneyland recently, they also debuted some new technology which uses compressed air to lift fireworks. This virtually eliminates the need for smoke-producing black powder and other materials at launch, significantly reducing ground-level smoke, and apparently: 'Disney is in the process of donating all seven patents associated with the new air launch technology to a non-profit organization so these patents can be licensed to other pyrotechnic providers'. Something to think about for those of us attending fireworks shows this weekend in the U.S."

66 of 441 comments (clear)

  1. The mighty Thor by Timesprout · · Score: 5, Funny

    needs no puny patents to create an aerial light and sound extravaganza.

    --
    Do not try to read the dupe, thats impossible. Instead, only try to realize the truth
    What truth?
    There is no dupe
  2. Fireworks with no cannon?? by Anonymous Coward · · Score: 5, Funny

    What's the fun in fireworks if there's no boom when they're shot?

    1. Re:Fireworks with no cannon?? by MooseByte · · Score: 4, Funny

      "What's the fun in fireworks if there's no boom when they're shot?"

      The celebration of freedom will now instead contain the Looney Tunes sound of "FWOOMP!"

      Which tragicomically seems a good fit, given the world today.

    2. Re:Fireworks with no cannon?? by Decaff · · Score: 5, Funny

      They will supply a DVD with DRM for the sound effects

    3. Re:Fireworks with no cannon?? by dekemoose · · Score: 4, Informative

      That don't actually make that loud of a bang when they are shot, and regulations require crowds to be at sufficient distance from firing sites (at least in MN) that you rarely actually hear them being shot. You only hear the explosions of the shells at altitude.

    4. Re:Fireworks with no cannon?? by MooseByte · · Score: 4, Funny

      ""FWOOMP!" isn't a bad sound. Gernade lauchers make a FWOOMP sound when fired."

      I guess good/bad depends on which side of the FWOOMP you're on then, eh? :-)

    5. Re:Fireworks with no cannon?? by bpatterson · · Score: 3, Funny

      As an adult, I'd say that I'd be a lot more motivated to drop the ridiculous amount of cash for entrance to the park if they would launch the actual Disney characters themselves instead of these boring fireworks. Who cares if they do it with compressed air or explosives?! Pumpkins are cool and all, but man, I'd go every weekend to see Chip 'n Dale getting blasted all to hell...

  3. not fun anymore by TedCheshireAcad · · Score: 5, Funny

    this takes all the entertainment out. like my mom used to say, its not fun and games until someone loses an eye.

    1. Re:not fun anymore by Dirtside · · Score: 4, Funny

      It's all fun and games until someone loses an eye. Then, it's just a game: Find the Eye.

      --
      "Destroy science and religion. Science would re-emerge exactly the same; but not religion." - Penn Jillette, paraphrased
  4. If It's Monday... by Anonymous Coward · · Score: 5, Funny

    I forget, are we supposed to like or dislike large entertainment corporations on Mondays?

    1. Re:If It's Monday... by Anonymous Coward · · Score: 3, Insightful

      I think the point of saying "I forget" rather than "I forgot" is to indicate that the subject is something that the speaker has forgotten repeatedly and is likely to forget again in the future, rather than something he/she has forgotten once. So it's more like "I keep forgetting."

  5. Kinda ruins the fun. by wafwot · · Score: 5, Interesting

    Part of the whole fireworks experience for me, and I'm sure for others, is the bombarding of the senses: sight, sound, and even smell.

    Fireworks with no gunpowder smell? With no black snow falling? I have so many memories of watching the fireworks over the lake in Epcot, the clouds of smoke only visible when the fireworks explode and light up the sky.

    Sounds like something I could just watch on my computer or TV, if I wanted. I'll pass. It was bad enough that they had to take away Mr. Toad's Wild Ride, now they're robbing of me of smoke filled fireworks.

    1. Re:Kinda ruins the fun. by kunudo · · Score: 4, Funny

      Plastic fantastic. Disney is making fireworks "family friendly", just like they did with cartoons and (grrr....) dragons, amongst other things. How is this a surprise? They're like a fluffy king midas, everything they touch turns cuddly and sweet.

    2. Re:Kinda ruins the fun. by athakur999 · · Score: 4, Insightful

      They're using compressed air just to launch the fireworks into the air. The actual fireworks themselves are still going to contain gun powder and such, so you'll still have the big bang when the firework explodes and still get some black snow. There just won't be that big cloud of smoke when it goes up.

      --
      "People that quote themselves in their signatures bother me" - athakur999
  6. Disney? by deuist · · Score: 5, Funny

    In other news, Disney has decided to release all of its old movies into the public domain. Says spokeman David Franz, "We realize that the DMCA and the Sonny Bono Copyright Extension Act were both mistakes that hurt the American public."

  7. explosions? by Anonymous Coward · · Score: 3, Interesting

    I wonder what happens if the firework explodes before the air tank is empty? Burning hot shards headed 200mph in all directions?

    1. Re:explosions? by drinkypoo · · Score: 4, Informative
      If they are using nitrox and not nitrogen they do not have a big tank, because they're compressing the air on-site.

      If they are using nitrogen, it's a non-issue.

      From what I understand the fireworks are self-igniting based on input from some onboard logic so it's not like you have to worry about blowing them out - I'd use nitrogen gas.

      Having self-igniting fireworks is potentially very cool, especially if you could get a nice cheap altimeter on a chip. If you coupled that with an accelerometer on a chip (analog devices makes a couple of different models) you could detect launch, free fall, terminal velocity, and make sure that the fireworks are over a certain altitude before firing.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    2. Re:explosions? by Aumaden · · Score: 3, Informative

      The actual detonation is probably handled by a MagicFire device.

  8. Wait a sec!!! by chrisgeleven · · Score: 5, Funny

    Disney apparently didn't get the memo about patents. They are supposed to hold onto them, write out thousands more of them in much more fuzzy terms, and then sue every person/company on the face of the earth if they have a one letter resemblence.

    1. Re:Wait a sec!!! by kingjosh · · Score: 5, Funny

      Although the compressed air patent was given to a non profit, Disney did decide to hold onto the patent for fire.

  9. I Wonder... by lenmaster · · Score: 5, Interesting

    ...how long it will be before you'll be able to buy one of those compressed air launchers at rest stops in South Carolina along route 95.

  10. Hmmm... by lukewarmfusion · · Score: 5, Insightful

    The release is very much lacking in details, but the concept is interesting. A friend of mine, a "licensed pyrotechnician," spent nearly three hours at our backyard launch (that rivaled any of the local shows) preparing powder and launch lines. The result was quite an investment in the firing equipment and materials; if the compressed air mechanism is really that efficient it will be reusable. Be clean and save money.

  11. Re:because rockets are only used by terrorists... by Anonymous Coward · · Score: 5, Funny
    ... that's why compressed air launch is necessary.
    I can launch a terrorist with compressed air
  12. Tax Scam by GigsVT · · Score: 5, Insightful

    Start using the methods and devices commercially and you prevent them from being patented, everyone can use them freely.

    Patent them and donate the patents to a non-profit, and you get a huge tax write off based on the assumed commercial value of the patents.

    Disney isn't really doing anyone any favors here, they patent the common potato cannon and then donate the patents to a non-profit for the tax write off.

    --
    I've had enough abrasive sigs. Kittens are cute and fuzzy.
    1. Re:Tax Scam by gurps_npc · · Score: 4, Insightful
      1) Disney deserves teh tax benefits, they did more work than you think.

      2) If they did NOT patent them, someone else could try to patent them and we would have to try and proove Disney's "Prior art".

      I think Disney did a good thing here, not a greedy one.

      --
      excitingthingstodo.blogspot.com
    2. Re:Tax Scam by mabu · · Score: 4, Insightful

      You might be right. I'm not disagreeing with you, but isn't it still a nice idea to put this earth-friendly technology in the public domain and allow others to use it? That seems to be a very positive, uplifting story during a time when there are so few nice things to read about. Can we suspend our intense cynacism for even a few moments?

      Then again, I'm probably just a shill for Disney, so ignore me.

    3. Re:Tax Scam by blueskies · · Score: 3, Informative

      But they aren't putting it in the public domain.

  13. Bah!!! by The-Bus · · Score: 5, Funny

    Leave it to Disney to severely edit yet another Asian product...

    --

    Small potatoes make the steak look bigger.

    1. Re:Bah!!! by rleibman · · Score: 4, Interesting

      Leave it to Disney to severely edit yet another Asian product...

      Are you refering to Mulan? If so, Disney didn't edit it, they pretty much wrote a new work *loosely* based on the original poem (which I've read in what I'm told is a good translation into Esperanto). I found particularly funny one line in the poems that mentions Mulan leaving "little brother" behind, in the Disney movie that's her dog's name.

      Still, all in all, it's probably one of my favorite Disney movies, its heroic, has a good message (particularly for little girls: you can do anything a man can do) and balances well a G rating with the harshness of war (that scene when they go into the recently hun-plundered village makes me gasp every time).

    2. Re:Bah!!! by Blakey+Rat · · Score: 4, Interesting

      More likely, he's referring to the fact that The Lion King is almost entirely ripped-off from a 60s Japanese TV cartoon called "Kimba the White Lion." (Even the name Simba sounds like the name of the hero from the Japanese series!)

      See this page for more details about this.

      To my knowledge, Mulan is 'in the clear' copyright wise, but The Lion King is obviously in violation.

  14. Someone has to say it by Cytlid · · Score: 5, Funny

    That blows.

    --
    FLR
  15. Disney does something environmentally sensitive... by Tofino · · Score: 4, Insightful

    Disney does something environmentally sensitive, by developing this technology and then DONATING it, and it gets run into the ground. Sigh.

  16. Safety by DreadSpoon · · Score: 3, Insightful

    I imagine these are safer for the technicians as well, no? I don't know how many people are injured each year by misfired rockets, but if this technology helps at least with the launching (if not with fireworks that explode in dengerous ways _after_ launch) this is of course entirely a good thing.

    1. Re:Safety by dekemoose · · Score: 5, Informative

      On a pedantic note, most aerial fireworks, at least in the US, are not rockets. They're fired from mortars, think cannons pointed up.

  17. Colors in smoke... by MisanthropicProgram · · Score: 4, Interesting
    One of the things I love about fireworks is the light that's reflected in the smoke.
    The cloud that's created from launch turns into the color of the current firework going off. It just adds to the experience. So does the smell of the gunpowder. I guess that's why laser shows bore me.

    I also hate the crowds at firework shows. That's another rant.

  18. 4th of July by torqer · · Score: 3, Funny
    If it can't kill, main, or otherwise cause bodily injury... It's no longer the 4th of July.

    It'll reduce Bottle Rocket wars down to an aiming contest. Instead of a crap-shoot on wether or not you'll escape with your hands intact.

  19. In other news.. by Eric(b0mb)Dennis · · Score: 4, Funny

    SCO launches new Linux Distro with Compressed Methane!

    Posted by BREAL69 on Monday June 28, @1:06PM
    From the ba-da-bing dept.
    breal writes "When SCO deputed its new CD-Delivering service, they also deputed some new technology which uses compressed methane to launch CDs to potential customers. Darl McBride reports that it significantly reduces the cost of their distribution. We're able to use employees and users alike to deliver our product! SCO also says it has patented the technology, which they call "Gas on DEMAND" which they plan on donating the patents to many non-profit organizations.'"
    Looks like something at SCO smells fishy again.

    --
    Excuse me, I don't mean to impose, but I am the ocean
  20. HOTT DAMN!!! by RegalBegal · · Score: 5, Funny

    The potato gun of my DREAMS!!!!!!!!

    --
    "It'll destroy you if you try to make it mean anything to anyone but yourself." - Henry Rollins
  21. I have heard quite a bit about this at work by miakeru · · Score: 4, Interesting

    I work at Disneyland, and this is something that has been talked about quite a bit at work. I do crowd control for Fantasmic!, which also works during the fireworks to set up standing areas and keep walkways clear. The two reasons for using compressed air was, like the article said, to reduce smoke at launch, and to reduce the noise of them being launched. The former was achieved, but the latter seems to have turned for the worse. The fireworks do make quite a noise when they launch, but they seem to make an even louder 'boom' while bursting in the air. The residents in the surrounding neighborhoods have been complaining for years about the noise these fireworks produce, and the new series 'Disney's Imagine - A Fantasy In The Sky' was supposed to calm the burning tempers. It seems to have failed. Complaining about the fireworks at Disneyland is like complaining about living next to a railroad track. They were there when you moved in, so you must have known what you were getting yourself into. Oh, and by the way, the new firework show is quite lame. The music played has nothing to do with the fireworks that are going off, nor does it seem to 'fit in.' Okay, so maybe the music from the Lion King (The Circle Of Life) fits in, as they do launch circular fireworks, but who wants to see a hallow circle? Save your time and stress from the crowd by going to a traditional park on the 4th. It will be much more fun, I promise.

  22. Another reason why this is a good idea by rewt66 · · Score: 3, Interesting

    One year when I was a kid, we got front row seating at a fireworks show where the launching was done from an island in a small lake. (The lake shore defined what was the "front row".) We were close enough to see the people on the ground, and the glow from the fuse as the firworks went up in the air.

    It rained on the day of the 4th, and apparently some of the powder in the launch tubes got wet. Quite a few of the fireworks went off at lower altitudes than intended. One particular launch went up about ten feet, came back down, lit on the ground of the launch site, paused a moment (during which the launch crew scattered), then went off on the ground. A couple seconds later, several more tubes launched. I don't know if the crew launched them, or the "extreme-low-altitude" firework did.

    Obviously, launching with compressed air is immune to this problem...

  23. Re:because rockets are only used by terrorists... by Total_Wimp · · Score: 4, Insightful

    because rockets are only used by terrorists... ... that's why compressed air launch is necessary.

    I know this is meant to be funny, but I would think anyone making a rocket propelled weapon wouldn't really care whether the propellent was black-powder based or air-based as long as it gets its payload to target.

    Actually, the U.S. military has a preference for non-flamable launch/propellent technologies because it's safer for the troops who're fireing the rockets. Basically a flamable propellant adds little or nothing to the damage to the target, but if the ammo store is hit, it adds quite a lot to the destruction of the ammo store.

    TW

  24. Used to have a boss who work with this by crosseyedatnite · · Score: 3, Interesting

    I think the note about it being years in development was correct. My boss from about 6 years ago worked on the imagineering team that was developing this technology. His portion was the miniature electronics on the projectiles that controlled the timing of the detonations.

    He had some wooden balls that were used as test projectiles for the launching mechanism, and would amuse us with stories of how they'd have to seek cover for when the balls would return. A lot of his effort went into making sure that the communication between the launch tube and the projectiles was correct (apparently, the chip inside the projectile had to be told to stop listening for a few milliseconds during launch or it would see some false signals)

    --
    e to the i pi equals negative one
  25. Safety First by purduephotog · · Score: 3, Insightful

    Lets face it. Fireworks are nothing more than mortars with a slightly mistimed fuse and a non-fragmentary casing.

    Using any form of explosive to launch this is dangerous. The tubes must withstand the tremendous launch pressure. There is also the severe risk of burning ashes falling back into the cylinder complex and igniting a shell from the top down- at which point you have a buring bomb waiting for the heat to fry the launch charge.

    Modern shows alleviate nearly all of these problems... but I've still witnessed a number of accidents- the most memorable (for me) was when an ash fell into a mortar array atop the Citibank tower in Indianapolis- the entire rooftop 'lit up'. Someone was severely burned, and (I believe) lived... burned over a good portion of his body.

    Non-flammable launches won't eliminate (I'm going to miss the downwind smell, sigh) misfires in the tubes, but they should lower the risk during launch. It won't eliminate (or even affect) an ash falling into a shell, but at least you have less explosive contained in a small space waiting to go off.

    Just my opinion, of course.

    Thank you, Disney.

  26. You haven't seen fireworks by Alice_Pleasance_Lidd · · Score: 3, Interesting
    until you've spent Chinese New Year in Shanghai. The sights and sounds are amazing, and fantastically diverse. Beats the most expensive 4th of July out of the park. And, of course, amazingly dangerous.

    I wish we had more holidays like Earth Day- where people are encouraged to participate. Modern life in the US has sort of lost the old idea of holidays- where you'd interact with a community, at the very least building relationships.
    How helpful are the UN's "Special Days"?

  27. My dad built original Dland fireworks computer by gsfprez · · Score: 5, Interesting

    Disneyland builds/built a lot of their computer control equipment in house. My dad made a lot of it, including "Mickey's Match" - the original computer-based fireworks launch system that was programmable.

    Before that, a man named Mickey (i'm not making this up, the guy's name was Mickey) physcially ran around and attempted (pretty well, from what i hear) and manually lit the fireworks to coincide with the music. Eventually, he started using electrically fired squibs. My dad's system allowed folks to pre-program sequences to launch with electrically fired squibs that would be in time with the music.

    Since you didn't run to Fry's in the mid 80's to pick up a Pentium III to run Star Tours ride control (actually, Star Tours runs on a 486 for its ride control, with one redundant computer for each simulator), a ton of the hardware for ride control, gate counters, etc. have all be built by hand by the Disneyland Sound department and WED.
    Many of the rides at Disneyland have my dad's name on the circuit boards in them.

    Just about every system, even to this day - are Z80 based. Its simple, its cheap, and they are bulletproof.

    Some of the Disneyland items he's made...

    - Invented/installed the fireflys in Pirates of the Carribean

    - Came up with putting the green-eyed rats at the end of Pirates as you go up back to ground level. We have a bunch of them at home and put them in windows and under the Christmas tree

    - Invented the light flicker-ers that have been used at Dland for almost 30 years to make plain lightbulbs in opaque houseings look like they are flame

    - Real-time population counter for Disneyland. Even went to the president's office and installed the LED display on his desk (prior to the popularization of "computer networks")

    - Completed the transition of all of Disneyland's audio and attraction control tapes to solid-state ROMs for playback. They used to have rooms FULL of huge tape bins with 1" wide magtapes that would spool into a big 1" x 40" x 20" bins and be one big long lopp track - literally. This took a long time becuase back in the early 90's when they did it, they needed to send out the tapes to special subcontractors that could digitize it.

    Its neet to see Disneyland, and how its starting to come back a bit after the 90's trashing by Eisner (ptooey!) now that he's been emasculated a bit. Things are getting better, and he's still making all kinds of neat stuff.

    I need to get to Disneyland more often now.. i haven' been in years.. and i used to go 3 times a month when i was a kid.

    --
    guns kill people like spoons make Rosie O'Donnell fat.
    1. Re:My dad built original Dland fireworks computer by Tofino · · Score: 4, Informative
      Some of the Disneyland items he's made...

      - Invented/installed the fireflys in Pirates of the Carribean

      - Came up with putting the green-eyed rats at the end of Pirates as you go up back to ground level. We have a bunch of them at home and put them in windows and under the Christmas tree

      - Invented the light flicker-ers that have been used at Dland for almost 30 years to make plain lightbulbs in opaque houseings look like they are flame

      Tell your dad he's my new hero for today. Those three things are, no joke, three specific details that my brother and I were discussing a few months ago when we were talking about the old-school Disneyland detail.

    2. Re:My dad built original Dland fireworks computer by scrod98 · · Score: 3, Funny
      My dad was a truck driver.

      I got to help him change the oil.

      Sometimes he brought home pallets so I could build a fort.

      Why couldn't you have been a cool engineer like gsfprez's dad, you bastard!

      Sorry, just still workin' thru some issues.

      --
      LETS DECOMPOSE & ENJOY ASSEMBLING
  28. Old news at Disney World - 1994 Reference by ironring · · Score: 3, Interesting

    After a looking googling: "The Disney system was described in: Proceeding of the Second International Symposium on Fireworks. 1994 4", 6", and 8" shells are lifted altitude ranging from 100 feet to 2000. Using air pressure ranging from 20 psi to 120 psi. Their system "Uses an electronic ignitor assembly controlled by remote located computer to detonate the shell in the sky." No further description is provided, other then the statement; "The electronic ignitor need not be inserted in the shell until the actual use." The system is patented, perhaps the patent provides more information. Actually -- On further research. The ignition system is describe in detail in vol. 2! "This electronic ignitor uses an electrolytic capacitor for energy storage, a custom integrated circuit for programming logic and timing, and a conventional pyrotechnic squib for the ignition source." The timing resolution is reported to be; plus/minus 0.015 seconds! They system that releases the compressed air also send a launch sequence to the igniter."

  29. Wedding Celebrations by yintercept · · Score: 4, Funny

    We really need to streamline the patent, development and deployment process on this one and get these "boomless" fireworks into Iraq and Afghanistan so people can start celebrating their weddings again.

  30. Re:because rockets are only used by terrorists... by saderax · · Score: 5, Interesting

    The big news is not in the compressed air:

    Disney is in the process of donating all seven patents associated with the new air launch technology to a non-profit organization so these patents can be licensed to other pyrotechnic providers'.

    Its nice to see a company using patents correctly, and donating them to an organization who oversees the pyrotechnic industry.

  31. I are a pyrotechnician by smurd · · Score: 5, Insightful

    When I set up a show, I bring mortar racks, shells and a firing system. The press release was kind of sketchy but I'm assuming I would need to bring a high pressure compressor (a Home Depot 175PSI compressor is not gonna launch a 5Lb shell 1500 feet with any reasonable mortar length). I would also need hundreds of feet of high pressure tubing (A finale rack is at least 100 feet from the main guns), and lots of fast (read expensive) air solenoids. It would take forever to set up a show like that.

    Then there is the safety problems, thy don't say how they ignite the time fuze and verify it's burning before a tubeload of rapidly decompressing, cooling air hits the shell. I would like to see some dud data.

    For a recurring display where you can leave the equiptment and just drop shells in the same tubes every night or week, this sounds like a dream though. I just can't see it coming to a municipal 4th of july show near you any time soon though.

    1. Re:I are a pyrotechnician by Mr.+Suck · · Score: 3, Informative

      I do some work for the Mouse. They've been working on this for several years. When I heard about it, the solution was similar to a gatling gun. All shells for a show could be fired from a single piece of equipment mounted on a truck bed. Add space saving to the list of advantages.

  32. Re:because rockets are only used by terrorists... by nacturation · · Score: 4, Funny

    Finally! The technology I need for my X-Prize entry. Scaled Composites, look out!!

    --
    Want to improve your Karma? Instead of "Post Anonymously", try the "Post Humously" option.
  33. How FireWorks Work by syr · · Score: 4, Informative

    In case anyone is interested, here is the fireworks page from How Stuff Works.

  34. Not true about the propellant by neilcSD · · Score: 4, Interesting

    http://ayup.co.uk/shuttup/shuttup2-0.html

    Falklands Island war between the UK and Argentina - the Sheffield was sunk by an Exocet SSM whose explosive payload did not detonate. The damage (and subsequent sinking) was caused by the rocket fuel.

  35. As Ivanova says . . . by harley_frog · · Score: 4, Funny

    "No boom today. Boom tomorrow. Always boom tomorrow."

    --
    It's all fun and games until someone loses the key to the handcuffs.
  36. Re:because rockets are only used by terrorists... by Martin+Blank · · Score: 4, Informative

    Actually, they don't use anything to fire 1000 pound projectiles from the Iowa. She was decommissioned in 1990 after the accident in #2 turret and never repaird. She's been in San Francisco since then, and would require tens of millions of dollars in repairs to be considered battleworthy, probably including complete replacement of the damaged turret.

    And the Iowa-class battleships had 16" guns, not 21", firing projectiles ranging from 1900 to 2700 pounds propelled by 550 to 650 pounds of powder. The largest deployed naval guns were on the Japanese Yamato-class battleships, and were 18.1" bore diameter.

    They are impressive, though.

    --
    You can never go home again... but I guess you can shop there.
  37. Re:Disney does something environmentally sensitive by Big+Bob+the+Finder · · Score: 4, Informative
    Interestingly, Disney has been working on making pyrotechnics that are much safer in terms of their toxicity. To get those pretty colors, toxic elements such as strontium (crimson), gallium (as gallium nitrate in whistling fireworks), antimony (salutes), barium (deep green), plastics (such as PVC, Saran, Parlon), arsenic (in copper acetoarsenate), and so forth. When you're a huge consumer of fireworks like Disney (just ask any pyro guy how hard it is to get GOOD fireworks, thanks to Disney buying whatever they can), those chemicals have to go somewhere. The long-term result is contaminated soil and water.

    People like Mike Hiskey at Los Alamos have been contracted by Disney to make fireworks that are based on organic molecules, and use smaller amounts of chemical salts for the color. He also works on high-nitrogen explosives, along with several others working in the specialized field of novel explosives design and synthesis.

  38. Re:because rockets are only used by terrorists... by Penguinshit · · Score: 3, Insightful


    You should donate what's left of your spinal column to medical science after your first test launch...

  39. Re:because rockets are only used by terrorists... by Rei · · Score: 3, Interesting

    Amen. I was kind of troubled when my family took me to Disney World.... being there, everything seemed almost the embodiment of annoyingly crass commercialism, almost like a disembodied head of the pro-globalization movement. Nothing was more than a millimeter deep, and everywhere you looked was the hawking of 100-fold price-jacked-up pieces of quickly discarded worthless merchendise made by sweatshop labor overseas. If "Disneyworld" was supposed to be all tinkerbell and fairy dust, all I could see was the support strings and the fairy-dust-inhalation-induced cancers.

    But then a company like that goes and does something like this... creates an actually clever twist on an old piece of technology, and then gives it away for free. And I also remember how they took on, not too long ago, the Christian Coalition and its ilk in order to provide domestic partner benefits....

    It all leaves one conflicted; are they evil or are they not? :)

    --
    I'm an owl exterminator!
  40. Re:because rockets are only used by terrorists... by Lenolium · · Score: 4, Informative

    Strangly, not really true.

    Although fire is a big risk, you are all (hopefully) shooting with the same gear on as a low-budget fire department, so the odds of you catching on fire are pretty slim. The entire time you are shooting (if it's a hand-fire), you are being rained on by burning embers (barring good winds)

    It's the concussion of the charge that will get you. Whenever you are loading or handling fireworks, you always keep your back to an open area, so if something happens you get thrown away instead of thrown into something solid. The buildings that they build fireworks in will blow to pieces much easier than any normal building so that anyone inside doesn't get compressed by all that pesky expanding gas.

    I've only done around a dozen shoots, and am not a licenced pyrotechnician, but on two of the shoots we have had misfires. One was one of my tubes on a hand-fire, and fortunately blew out the other side of the rack (it was my first shoot). The second misfire was on a finale so everyone was quite a ways away, we didn't even really realize what happened until we were cleaning up and found a 2-by-4 twenty yards or so away and a half of a rack with a pretty much destroyed tube. Fireworks are fun.

  41. Will only supplement normal launch methods by pyrofx · · Score: 5, Informative

    The Disney gatlin gun uses compressed air to launch shells in the 4 to 8 inch range. At least this was the sizes they launched a few years ago when I saw the system, maybe they they go up to 10 inch but Disney doesn't shoot many 12 inch shells anyway.

    They have a large several hundred horsepower air compressor at each air launch system for the lifting oumph. No nitrogen involved as it is too expensive to use in the quantities required.

    The shells are plastic encased shells that are a little enlongated (not sperical like normal shells, think eggish). Inside each shell is a little electronic circuit and electric match. The circuit is engergized by a inductive coil in the base of the fiberglass launch tube. The circuit doesn't use altitude per se but a timed interval instructed in the coding pulse at the launch event.

    The bulk of the show will still be fired normally as they have lots of ground level effects and lots of smaller shells that would be too numerous to fire in the air launch system unless they have made great strides in its firing rate. I shot many a show that had 100 of 3 and 4 inch shells going up per second.

    Still plenty of smoke to be smelled around the lake in Epcot.

    Ken

    1. Re:Will only supplement normal launch methods by RadioTV · · Score: 3, Informative

      No nitrogen involved as it is too expensive to use in the quantities required

      I don't know if Disney uses nitrogen or not, but it is possible to generate compressed nitrogen in fairly large quantities. My step-dad works on a natural gas drilling rig. When they hit a gas pocket they switch from compressed air drilling to nitrogen drilling to reduce the risk of a down-hole fire. They do this with a special compressor that outputs 98%+ pure nitrogen gas at more than 3000 CFM at several hundred PSI.

      --
      I have great faith in fools - self confidence my friends call it. - Edgar Allan Poe
    2. Re:Will only supplement normal launch methods by PhaseChange · · Score: 3, Informative

      There are a number of ways to make relatively cheap, low purity (~98-99.5%) nitrogen. Pressure swing adsorption (PSA) units compress & dry the air, then force it through a molecular sieve that preferentially adsorbs most of the oxygen.

      Put a couple of units in parallel to allow one to be "cleaned" of the adsorbed O2 while the other is producing nitrogen, and you have a continuous flow of (relatively) cheap nitrogen.

  42. Disney-fied Fireworks -- No Thanks! by dalesun · · Score: 3, Insightful

    Disney-fied fireworks sound like a really bad idea. I'm a huge fan of fireworks displays, and feel it would just not be the Fourth of July without smelling a little sulfur!

    I've been to most every display on The Mall in Washington, DC for over 20 years. For July 4, 1986, I went to the Statue of Liberty centennial in NY, which was the most fantastic and outrageous display I've ever seen (they somehow removed ALL the cars in lower Manhattan to accommodate the crowds); it was surreal.

    I highly recommend seeing a display close up. On The Mall in DC, I love to get as close as possible to the launch site near 17th Street. The experience of HEARING each launch, and the anticipation of seeing the shell rise above you before exploding in all its glory is FANTASTIC. You know when they're coming, and have some idea of how big they will be. It's much different than watching from far away, there's no delay between the flash and the bang--and you FEEL the big bangs. There's also all kinds of sizzling, screaming, and crackling that you don't here from far away. Most of the ground level smoke comes from personal sparklers, firecrackers, and such (I expect that these things are prohibited in the magic--and antiseptic--kingdom); smoke from the official display is not a problem.

    The best place to see the fireworks on The Mall in DC would be from the Washington Monument grounds, but this area is mobbed with people from early in the day. Better to go just before Showtime to the much calmer and uncrowded Constitution Gardens (enter near 20th and Constitution Ave.). People think that the trees here will obstruct the view, but they don't, because most all of the fireworks will be STRAIT UP. They don't allow people to get TOO close, but you may see the rare bit of shell fragment or ash falling, don't be alarmed as they will burn out before getting to the ground. However, please do PAY ATTENTION to what's going on around you if you're out anywhere on the Fourth.

    Fireworks would not be the same with some sissy air launcher. This cleaned-up fireworks technology might be appropriate in Disneyland, but I really hope that it stays there.

  43. Re:because rockets are only used by terrorists... by StrangeTikiGod · · Score: 3, Insightful

    personally, I'd rather see a company I invested in strive for a modicum of social responsibility rather than the relentless pursuit of the almighty dollar at the expense of the aforementioned trait. And yes, I do own Disney stock. this doesn't bother me one bit.

    --
    "split the clouds and divide the sea and show those evil guys how nasty the Tiki gods can be."