Discussion Topic |
|
This thread has been locked |
Jerry Dodrill
climber
Bodega, CA
|
|
|
Oct 10, 2005 - 03:19pm PT
|
Speaking of directional blasts, my brother-in-law is an architect and did some work for AeroJet over by Sacramento designing bunkers for explosives and rocket fuel. The blast potential would be devastating if it went toward town. If I remember correctly they aimed the blow out doors East and were asked to allow for a 70 mile (!) blast range, up into the foothills. I always wondered what they were storing.
|
|
Gary
climber
Desolation Basin, Calif.
|
|
|
Oct 10, 2005 - 05:32pm PT
|
"...Boiling chili splattered all over the rock..."
Yeah, I have much the same reaction after eating chili.
|
|
spyork
Trad climber
Fremont, CA
|
|
|
Oct 10, 2005 - 05:44pm PT
|
Camping on the middle fork of the Yuba River a long time ago. Sitting around the campfire with my brother. One of his drunken friends walks by the fire. Next thing I know I hear pffft-zing!!! My brother and I ran like hell. Dipshit threw a handful of .22 hi -powers in the fire. Guns, alcohol, and illegal substances just dont mix well.
Steve
|
|
Craig Sundquist
Trad climber
Yakima, WA
|
|
|
Dec 17, 2005 - 02:05pm PT
|
No one has mentioned ammonium tri iodide yet. Fun stuff! Take iodine crystals and add household ammonia. Pull out the sludge and let it dry. Touch it and it explodes--contact explosive! Had fun in college with paper airplanes loaded with the stuff tossed out the 9th floor dorm window. Fun on the floor or in key holes. Experiment with small bits first. Can be pretty powerful.
|
|
Eric Chisholm
Trad climber
Sebastopol, CA
|
|
|
Dec 17, 2005 - 02:57pm PT
|
This is a B.L.E.V.E. Boiling liquid Expanding Vapor Explosion
http://www.dcfp.navy.mil/mc/video/truckfire.htm
This the same thing that happens with any pressurized steal vessel that has direct flame contact above the liquid line in the vessel.
A bic lighter will not BLEVE, the plastic melts before the liquid boils and create enough pressure to rupture.
Gas and Diesel transports will not bleve ether, they are made of aluminum and met also.
|
|
Batrock
Trad climber
Burbank
|
|
|
Dec 17, 2005 - 03:29pm PT
|
I cant believe nobody has mentioned the Sobe Bomb, makes a awsome mushroom explosion wuth very little noise.
It creates BLEVE in a Sobe drink bottle.
Take one glass Sobe bottle
Fill to the top with gasoline, leave no airspace
Screw on lid of bottle
Put a small pin hole in the center of the lid
Wipe off residual gas
Place upright in the middle of super hot campfire coals
(it is key that it DOES NOT FALL OVER)
Stand back!!
It will start to sputter then the gas will ignite as it escapes through the pin hole. It is now acting like a jet engine. As the pressure builds in the bottle it will eventualy blow the lid off and create a spectacular fire bomb. We did 3 of these in the Saline Valley last month and folk driving into the valley saw them from 30 miles way. The glass does not explode and can be removed from the fire soon after the explosion and disposed of properly. I am saving my Sobe bottles for my next desert adventure :)
|
|
Batrock
Trad climber
Burbank
|
|
|
Dec 17, 2005 - 04:35pm PT
|
Rajmit
I am not saying it could not happen but I have seen several of these things go off and the top alaways pops off before the pressure is enough to blow the glass apart. I also have only seen it done with Sobe bottles. I would not try it with another type of bottle.
We are talking bombs here right? I never said it was safe. And I did say stand back.
|
|
Eric Chisholm
Trad climber
Sebastopol, CA
|
|
|
Dec 17, 2005 - 04:37pm PT
|
Batrock,
That is not a bleve. There is no explosion. Just a hell of a fire ball.
It is a basic jet engine.
Because there is a hole in the lid and the lid is made of a soft metal it should never explode. the hole should allow the excess pressure to be relived before it ever explodes (but be careful).
Bet it looks cool!
-Eric
|
|
nature
climber
Flagstaff, AZ
|
|
|
Dec 17, 2005 - 04:51pm PT
|
One night we're sitting around the campfire in JT and Angry Tim is playing with a .45 slug (real) Ya'll know him right?
He's also holding a AA battery hidden in his hand under .45 slug. He pretends to toss the slug into the fire (he tossed the hidden battery). The entire fire TAKES COVER except for this one hippy kid that was strummin' the guitar. The kid looks up to see an empty fire and decides he should leave in a hurry as well. A few minutes later we hear the battery explode (pffffffffft). Angry boy was laughing his ass off at us.
Oh... and then there was that New Years when some knucklehead decided to light the rocks on fire RIGHT next to my campsite. The best part was watching the two boneheads walk off the rock right into the hands of the NPS. The fire was bigger than an exploding Bic.
|
|
pud
climber
Sportbikeville
|
|
|
Dec 17, 2005 - 04:53pm PT
|
for jetcrashes, exploding buildings or train wrecks i like to use Gasoline at 75 psi through birdbeak sprayers with Liquid propane superheated and delivered at 120 psi.
[url=http://www.freeimagehosting.net/]{{img}}h~~p://www.freeimagehosting.net/uploads/70d461216e.jpg[/img][/url]
|
|
Karl Baba
Trad climber
Yosemite, Ca
|
|
|
Dec 17, 2005 - 05:06pm PT
|
You guys must really trust the Government to post your explosive making info on the net. I don't trust em. See the link that Matt posted in the Tax Dollars thread.
http://www.southcoasttoday.com/daily/12-05/12-17-05/a09lo650.htm
Not to mention the recent scrapping over NSA wiretaps.
See ya in Gitmo!
peace
karl
|
|
Batrock
Trad climber
Burbank
|
|
|
Dec 17, 2005 - 05:23pm PT
|
Eric,
Dont you think the gas in side the bottle is boiling before it blows it's top? When the top blows the mushroom fire ball reaches a height of about 40-50'. In the first few minutes after it is placed in the fire it vents like a jet engine making shrill sound and a jet of flame about 3' high. As product is burnt off I would think vapor starts to expand as the product boils to a point beyond what the cap can handle. When it finaly blows isn't it vapor that causes the fireball?
I am not saying you are wrong because it sure sounds like you know what you are talking about but why would this not be considered a mini BLEVE?
Kevin
|
|
pud
climber
Sportbikeville
|
|
|
Dec 17, 2005 - 05:41pm PT
|
good point Karl,
most of the explosive devices described on this page are illegal and a couple are extremely dangerous.
i would not reccommend any of them.
|
|
flamer
Trad climber
denver
|
|
|
Dec 17, 2005 - 07:18pm PT
|
Batrock.....It is not considered a BLEVE because it does not explode. It vents....but doesn't explode.
I was going to post up about BLEVE but Eric beat me too it.
Early someone asked about shooting the Very large propane tanks that you see in rural areas. Shooting them would not cause them to explode. They are not under pressure(well not much) they are actually full of liquid propane...which makes them ripe for a BLEVE if heated to the boiling point...but not a "puncture" explosion. However BLEVE could only happen if the pressure relief valve malfunctioned.
Now natural gas tanks are a different story....
As a fireman let me thank you all for my job security!!!
josh
|
|
Melissa
Gym climber
berkeley, ca
|
|
|
Dec 17, 2005 - 07:36pm PT
|
When I was in school, not being a 'real' chemist an all, we weren't allowed to use the really feisty chemicals. We were left to play with liquid nitrogen and dry ice instead. A favorite was putting dry ice in assorted sealed vessels until the vapor pressure was enough to blow up the vessel. This was always something tame, like blowing up a test tube.
One day after tossing buckets of liquid nitrogen down the hall and blowing up a few test tubes, one of the more serious members of our lab who'd been poo-pooing our antics quietly decided to drop a big hunk of dry ice into a soap-filled bucket of speant glass pipettes as she worked at her bench.
What happened was like some absurd scene out of a bad sitcom. The entire lab flooded with this ever expanding flow of foam. She panicked and ran out of the lab, leaving the dry ice to do its thing. It's amazing how great a volume of suds a 10 gallon bucket is able to make.
|
|
Batrock
Trad climber
Burbank
|
|
|
Dec 17, 2005 - 08:07pm PT
|
Josh,
It is venting pretty intense before the top blows. When somthing explodes ie. a tank doesnt it usualy fail at it's weakest point? In the case of the SOBE bottle wouldn't the cap be the weakiest point? The vapor inside the bottle reaches a point where the expansion can no longer be contained and it blows, I hesitate using the word explode because I am probably wrong but it sure seems like a explosion of vapor to me. The video a few posts up of the BLEVE in I think it was Mexico was venting prior to the explosion, the venting just could not keep up with the expansion of vapor. It seems like it's the same with the SOBE bottle only on a microscale. I have been just feet away from a propane tank exploding in a confined space. It knocked me off my feet and threw me back about 15 feet. Fortunetly the tank flew the opposite direction. I guess I am having a hard time with when does a violent vent become a exlposion. Kind of like when does hot water become warm water. And BTW I am a fireman too. And it was fireman who firs showed me this:)
|
|
can't say
Social climber
Pasadena CA
|
|
|
Topic Author's Reply - Dec 17, 2005 - 08:49pm PT
|
Minerals, you really should have joined up. You probably missed your calling. How do you think it feels with a minigun in your hands??? Purdy cool.
|
|
cybele
Ice climber
finally, west of the Mississippi
|
|
|
Dec 17, 2005 - 08:53pm PT
|
Your FBI files are growing by the minute! Great thread.
|
|
|
SuperTopo on the Web
|
Let us know!