More Ways to Blow Things Up
Posted by
michael
on Fri Jan 31, 2003 07:36 PM
from the friday-special dept.
from the friday-special dept.
pitabutter writes "Since the /. crowd seems to appreciate the exciting combination of amateur chemistry and fearlessness (what is it about intelligence and the desire to blow things up?), Sam Barros' site would be worth a look. Rail guns, high voltage, electromagnetic experiements-all there and with videos to boot. Unable to confirm if Sam still has appendages intact........"
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If you like this, try this, too.... (Score:5, Informative)
Nye Thermodynamics - DIY Jet Turbines! (Score:4, Informative)
Nothing like the sound of the afterburner kicking in. I want to make a jet ski hovercraft out of these one day...
Re:If you like this, try this, too.... (Score:4, Funny)
Ahhh, one of my favorite sites.
Don't worry, George knows what he's doing. That's why he's not allowed to do it anymore.
What about amasci and keely-net? (Score:4, Informative)
answer (Score:5, Insightful)
Lack of it?
Re:answer (Score:4, Funny)
>Lack of it?
Well, intelligence and common sense aren't always connected. Making these devices requires people with a lot of intelligence and posessing very little common sense.
intelligence? (Score:5, Funny)
A: they are inversely proportional. just look at the current US administration.
Good lesson for an engineering student (Score:5, Funny)
> PowerLabs was featured on a ZZZ Article;
> traffic triples (now at 4000+ hits/day).
Let's see what he's learned about scalable designs. I guess Slashdot is going to be part of the "+".
Wow (Score:3, Funny)
So what happens when he has kids, I wonder???
Build, don't blow... (Score:3, Interesting)
I can't help thinking about Vannevar Bush's article in the July 1945 Atlantic Monthly [theatlantic.com] in which he surveyed the possible uses for organized technological development and concluded that "Memex" - the source of the hypertext idea, was the most important thing to work on. What would a similar analysis uncover as the most important problem for technology and "Amateur Scientists" today? I don't think it would have anything to do with blowing things up...
bob wyman
Neat (Score:3, Funny)
Hmm, on second thoughts, no, don't send that to them. Last thing they need is someone to build a portable potato railgun...
Daniel
Go Edison... (Score:3, Insightful)
And he was the greatest inventor of all time... why?
gone are the days of mr wizard (Score:5, Insightful)
I grew up with the Mr Wizard generation. Making bombs from flour, hot air baloons and electricuting weiners. Which looking back could have killed me. In highschool we discovered the proportions to gun powder and made a beaker full
Re:gone are the days of mr wizard (Score:4, Funny)
Unless you're female, in which case it's someone else's.
Re:gone are the days of mr wizard (Score:4, Funny)
Security through noneducation? (Score:5, Interesting)
NaCl (table salt) - orange KCl (salt substitute, road salt) - purple CaCl2 (road salt) - orange Copper - blue
plus paints are a good source of exotic transition metals, if you can figure out what exactly they contain.
Report from the general (Score:3, Funny)
Excellent. With these new weapons our plans to invade earth will soon be complete. Glory to the planet Zorba!
Differences in people... (Score:5, Funny)
Oh no, you're wrong. Blowing things up is a univerisal love of all humans. It's just the un-intelligent ones only do it once.
Holy shiznit. (Score:3, Interesting)
For my senior EE project, I built a railgun. Used aluminmum bar stock for the rails, milled out a channel for a ball bearing, injected the bearing with a paintball gun. The power supply was a bank of electrolytics in parallel totalling 48 mF at 600V, so around 9 kJ total.
Didn't look anywhere near so impressive as this guy's.
Re:Holy shiznit. (Score:5, Interesting)
I think out of the hundred meter per second or whatever that the projectile leaves the breech, about 90+% of the speed is due to the gas injector he uses to avoid spot welding.
The problem is that the pulse of current happens way too early in the gun, and he skids off a lot of his power in arcing.
He used to run a forum on his website (it seems to be still there, although it doesn't work right now). There was a lot of people, more or less as knowledgeable as him on his forum really interested in trying to help him design it; but he ran roughshod over the lot of them. And they told him about the pulse length issue. So basically they all got majorly pissed off and went off elsewhere in a huff, and they laughed when it didn't go supersonic; well it was Sam Barros's rail gun, but they were trying to help, and he ignored them, and he suffered. Sam had spent too much time going for 'oxygen free copper' to try to improve the current flow, but it didn't help, because but didn't get the fundamentals right.
But that wasn't the reason they left; it was just the proverbial straw; the problem is that Sam has a few ego problems, atleast online, he may well be more personable in the flesh; but he enjoyed telling people how stupid they were online. Mostly they were too, but few people came back to the site after that kind of treatment; and sometimes Sam was wrong, so he treated them unjustly for no reason.
So, basically, the powerlabs forum has basically died, all the contributors went elsewhere.
His basic technical skills are exceptional, although nothing he has done is actually original, so it remains to be seen whether he can achieve his potential, and as anyone can see from the site- he is good.
Babu smash! (Score:5, Funny)
I think that's more of a male thing than an intelligence thing.
All you destructive women out there, feel free to violently disagree. And get it on camera, for fuck's sake.
Survival Research Labs (Score:5, Informative)
We DO like to blow things up (Score:3, Funny)
explosive water (Score:5, Interesting)
I've been working on this for years.. it all started in the bathroom at Moore Jr High School..
don't drink the tap water.. you're supporting terrorism every time you turn the tap.
pm
Ahem, I have noticed a few errors . . . (Score:4, Informative)
Sorry, Ben Franklin used those jars in Philly way back before france [franceisoc...ermany.org] was a county in Germany.
Yes, Edison used DC, his competitors (I think they are called General Electric now but I may be mistaken) used AC and the story is backwards!
The AC guys made the DC electric chairs to show how "dangerous" DC was and they "showed" how "safe" AC was by it not killing people!
yea, that might be right.
Why the young people always with the explosions? (Score:5, Insightful)
It's not how long you lived, it's HOW you lived...
I felt the same way when I was his age
Seriously; there are physiological changes that occur, alterations in brain chemistry, which, let us face facts, impair the judgement and good sense of young people. That is not to say that there are no teenagers with far better sense than the average adult; but even so, it's a stage in neurological development that does not promote sensible behavior.
It also means that explosions are not nearly as cool as they seem when you're 18. Another fact - chicks do not dig explosions. I learned this the hard way so now I pass it on to the younger generation.
I don't think explosives chemistry is a good starting place for a junior chemist; Sam Barros has obviously done fine, but I'm not sure how this stands as a role model. For one thing, he clearly does have good sense (note the many safety warnings emblazoned all over his web page.)
Chemistry involving dyes, optics, visual effects, material science and metallurgy (electroplating, for example) is no more difficult and much safer. Making stuff like this can't indulge your inner pyromanic like a bomb can. I'm not trying to criticize teenage boys for wanting to cause some damage - I certainly did - but it worries me.
So, I wonder - why does the slashdot story focus on the explosives? His EM devices are cooler anyway.
Ah, the hell with it. I'm only 23 years old! What am I thinking? It's time I put together a web page on how to weaponise biological and chemical agents. Now THAT would earn you some attention at the science fair.
Finally - when blowing up your school, wear ear protection! Regrowing fingers and toes is just around the corner (well, hopefully, I have some friends working on this); regrowing your inner ear may never be possible.
The Electrocuting Water Cannon (Score:5, Informative)
As noted in the Village Voice [villagevoice.com]:
The innovative savvy of American electrical engineers always astounds. If something terrible can be built in the name of security, they never shirk. Who else would be brilliant enough to come up with a water gun that carries molar-rattling electrical shocks?
The aqueous electrocutor sprays a "high-pressure saline solution with additives" mixed in to maximize range in putting down that troublesome rabble. "[Debilitating] but not lethal shocks" move through the water jet, according to Jaycor's online brochure. The company hints the voltage can be turned up "to deliver potent electrical shocks to equipment as well as individuals."
This stuff is starting to scare me. And the basic idea is simple enough that it could be a do it yourself in your own garage type of project for either the profoundly brilliant or profoundly stupid
Sam Barros? Bah! That's kids stuff compared to.... (Score:3, Informative)
Here's a tesla coil for you!! [srl.org] (Standing 20 Feet Tall)
With shows like:
A CALCULATED FORECAST OF ULTIMATE DOOM: Sickening Episodes of Widespread Devastation Accompanied by Sensations of Pleasurable Excitement [srl.org]
...and...
A Carnival of Misplaced Devotion: Calculated to Arouse Resentment for the Principles of Order [srl.org]
...and, of course...
The Best of SRL!!! [srl.org]
Pretty friggin cool 'eh?
Dolemite