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San Diego's Fireworks Show Over In 15 Seconds
First time accepted submitter fotoguzzi writes "Garden State Fireworks is investigating how the entire Fourth of July show was launched after a signal was sent to the barges that would set the timing for the rest of the show after the introduction. Can anyone suggest how such a trivial step could go so disastrously wrong?" It's not the first time such a thing has happened, either.
But what an awesome 15 seconds that must have been!
Yep, just like my first time ... she didn't seem to think so though.
My work here is dung.
I hear that happens to every fireworks show at some point in its life. It just needs to relax, take some stress off and not worry about how it performs. Just enjoy the show.
Ok! Ok! I must have, I must have put a decimal point in the wrong place
or something. Shit. I always do that. I always mess up some mundane
detail.
You could eat a 20lb sack of potatoes over the same timeframes. How does that not get better as time reduces?
The shorter the time frame, the more entertaining it is to watch someone try and devour 20lb of... well, anything.
Otherwise, why bother timing eating contests?
An enigma, wrapped in a riddle, shrouded in bacon and cheese
Don't do that. No one reads the comment subjects. When you stick the whole message there, you just look like an idiot.
When I was in college I saw something similar. It was a sticky hot 4th of July evening. Just as the show was starting a big thunderstorm moved in. When they shot the first couple of rockets up, big flashes of lightning arced through the clouds in response. It was pretty impressive. They decided to shoot everything off at once, one after another; fireworks, thunder claps, lightning, all at once. It was totally awesome. Then it started to rain and all the braless coeds in tee-shirts had to walk back to campus. One of the better displays I've ever seen.
Well.....
There we go. That's more accurate, lol. I think "ruining the show" is a bit harsh :-P
By the way...
What ****ing planet is this person from?! It is NOT COLD in San Diego at the moment at any time of day.
Watch for yourself
http://youtu.be/lrPCEubDZ9A?hd=1
They can see an artistically choreographed fireworks show next year. They probably saw one last year. Around here they do one every Thursday, all summer. How often do you get to see what happens when all the fireworks go off at once?
"The only once in a lifetime experience I see here is that they can fondly look back at the year the 4th of July was a complete ripoff."
Strange how people getting a fireworks show for free can feel ripped off. Quite the sense of entitlement, hey?
Electric matches on the circuits take 5 milliamps to ignite them.
After the fireworks are loaded and wired up, testing is done to identify matches that aren't wired up right. Is there a chance that the testing process failed. On computer systems, it is pretty automated and happens fast. If the test resistor wasn't in the circuit properly, it might look like that.
Notes
I am a BATF licensed pryotechnician.
I assist with a small show every year (our last night went flawlessly)
I have never worked with a computer fired circuit
I have designed the electronics and software of a fireworks firing system for a company that does regular shows here in Catalonia/Spain.
Believe me, experienced people are very cautious in everything they do, but unexperienced people can make big mistakes if they are overconfident in a black box system that will do everything for them.
In one point specifications said:
-The firing system must make an autotest for each circuit for the team to check all connections are in place.
They test the firing circuits of the fireworks several times before the show to fire all the material. In our case it was done exciting the fuses (sorry I'm not native english) with a safe very low current to see if the fuse is electrically present, and the inspections does a check of a circuit every 0.05s, so you can check the entire show in a few seconds.
For me this seems the check was done with full current on the circuits which fired all the fireworks during this test procedure.
It's quite surprising to have someone design a system that lets this happen from my point of view, in our case we made the circuits impossible (due hardware to redundant hardware switches and circuits) to excite to fire during the test (there are various physical limiter).
So... it seems someone who had not enought experience with fireworks managed to build his system and convince this people to use it... but its surprising, it's a pretty conservative people, at least the ones I know.
I was, up on the hill at USD. The sound-wave alone was AWESOME. Probably far more memorable than the actual show would have been.
You give her 15 seconds of fireworks so intense they can be seen in the next state?
I don't think you need to worry about her cheating on you.
A am a pryotechnician that works exclusively with computer fired shows. From what I'm hearing on the mailing lists so far, they were using the Fire One controller. We also use them (we have over 100 modules at $795 each). I haven't been involved in the "Loading" of the show into the embedded controller for the past few years, but I was called into action about 3 years ago when we had the same problem with our "semi automatic" shows (press a button for each event). I found there was an additional step when downloading the show from the PC to the firing controller called "Assign Delays" that had to be manually entered when loading. Without that step, all shells for each event fired immediately. I don't know if Fire One ever fixed it because it's now part of our written checklist for loading and we haven't had a problem since, and Fire One is notorious for fixing a problem with one customer, updating the firrmware but not telling the rest of their customer base that there is an update.
If you are using Fire One, you can thank me for the new Line receivers in the new modules, I had to go to the plant and show them the problem.