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Mythbusters 5/27: Thermite Meets Ice

Christopher

Writer
Admiral
Odd -- the clips of the hosts in the titles (the ones after their names are given where they say funny things) were unfamiliar. Are they from upcoming episodes? Is this airing out of sequence?

Thermite + Ice: I liked the initial test with metal plates, though I'm surprised the thermite went through so few of them.

Wasn't thermite involved in the Hindenburg myth? The idea was that the paints combined into a thermite-like substance?

So the myth was confirmed, but unexplained. My initial hypothesis for the cause of the explosion was that it was a steam explosion -- the thermite flash-vaporized the ice in the interior of the pile, and that rapid expansion blew out the whole structure forcefully. But on second thought, it does look like more of a conflagration than that. Maybe it's a mix of my idea and Jamie's -- the steam explosion pushing through the thermite (which was apparently powdery) might've aerosolized it as Jamie said and let it burn explosively. But I don't know... I still think that steam is the source of the explosive force, and it just scatters the hot, bright thermite to create a fireball effect.


Woofer weapons: I get the idea that this myth is a fictional story based on the established vibration sensitivity of those SKS weapons, a fable someone made up to mock or comment on that design flaw.

And what a disturbing design flaw, leaving a firing pin to float around loose like that. What idiot thought that up, and why wasn't the design outlawed? Still, at least the myth was busted, showing that they don't go off as easily as the myth suggested.

Did they make those bobbleheads of themselves, or are those for sale somewhere? I liked the Buster-head hood ornament.

When they drove the car out to the bomb range for testing, I could swear they parked it right next to the crater from the thermite myth. :D Really, there was a burn mark or shallow crater there that had a brick-red color to it, like the bricks the ice and thermite were mounted on.

This myth involved two of my least favorite things, guns and really loud car speakers. Guns are more dangerous, but I'd be hard-pressed to say which I find more obnoxious and unpleasant.


Handgun Horror: Eegh. Nasty myth, and scary-looking firearm. That thing looks like the sort of gun you'd expect to find in Yosemite Sam's holsters. It's like a caricature of a revolver. And that gas and flame blowing out were scary. And indeed they confirmed the myth. Again, eegh.

"Show of hands." :lol: Those chicken-based hand analogs were clever but kinda icky.
 
Wasn't thermite involved in the Hindenburg myth? The idea was that the paints combined into a thermite-like substance?

Yeah, the belief was that it was themrite that brought down the Hindenberg (ignorning the several cubic feet of highly reactive hydrogen in the thing!) more so than the hydrogen.

Using scale mockups of the great airship the Mythbusters tested it three ways, period-accurate paint w/o hydrogen (ship burned slowly), period-accurare paint w/ hydrogen (ship burned similar to archive footage) and thermite-paint w/ hydrogen (WOOF!!!).

The paint used on the ship had the right ingredients of thermite but not in the right porportions to cause a thermite reaction.

Did they make those bobbleheads of themselves, or are those for sale somewhere? I liked the Buster-head hood ornament.

A quick check gets no results for Mythbusters bobbleheads. I then suspect that Kari -who was VERY pregnant in this episode!- made them at some point. And yeah, I think they've pretty much always have used upcoming episodes in the opening credits seqeunce. As you've noted in the past, they seem to work on several myths at once/at different times and whomever puts the show together just kind of assembles them however.

I've no real comments for this week's myths as nothing stuck out to me as worth mentioning in regards to their methods. It was neat seeing that sound engineer again. :)

Oh!

Something came to me.

For his "human hand analogue" Adam used cooked chicken bones. Though I doubt it would've made any real difference -further I'd argue that poultry meat is very different from human meat- but cooked bones aren't the same as un-cooked bones. Cooking does a lot to bones that make them a lot weaker and more brittle.
 
And yeah, I think they've pretty much always have used upcoming episodes in the opening credits seqeunce.

No, I've almost always recognized the "host quote" bits. These days they rotate them pretty much every episode, but there used to be fairly standardized ones, famous quotes that got used routinely -- particularly the two Adam Savage classics, "Am I missing an eyebrow?" and "I reject your reality and substitute my own!" They were clearly chosen specifically because they were well-known from prior episodes.

For his "human hand analogue" Adam used cooked chicken bones. Though I doubt it would've made any real difference -further I'd argue that poultry meat is very different from human meat- but cooked bones aren't the same as un-cooked bones. Cooking does a lot to bones that make them a lot weaker and more brittle.

True, but I believe the point of failure wasn't in the bone, it was at the joint. In which case it would be more a question of tendon and ligament strength.
 
Jesse Ventura has been bringing up thermite as a possible means for a controlled demolition on 9/11. Skeptics say a controlled demolition is an involved process that requires so much planning and prep work the idea of a controlled demolition nobody knew about is ridiculous. Jesse claimed you could apply Thermite like it was paint. Anything relevant from the show on that? Is Jesse a muckraker for our time or has he eaten one to many chair shots?
 
True, but I believe the point of failure wasn't in the bone, it was at the joint. In which case it would be more a question of tendon and ligament strength.

Right, just saying that using cooked bones doesn't help their "case" any of trying to be accurate. Neither does using chicken meat but I guess there's no pork item they could've used similar to finger bones. But that does make one wonder why they didn't use the plaster they've used in the past to stand-in as bones along with balistics medium.

Is Jesse a muckraker for our time or has he eaten one to many chair shots?

The latter.

Jesse is out of ignorant mind.
 
Getting to Vegas on one tank of gas...CONFIRMED


As to the 9/11 conspiracy, there must be easier ways to ignite thermite than Boeing 747's.
 
For the record.

Thermite vs Ice - Confirmed. An Internet video showed a bucket containing thermite placed upon several large blocks of ice before being ignited causing a large explosion, but it was suspected that a hidden amount of black powder caused the explosion instead of a reaction between the ice and the thermite. The video gave sufficient detail to recreate it. This proved to be very easy to do, with apparently identical results. They later created an even larger explosion with more ice and much more thermite. Nobody was able to explain why the explosion occurred.

Woofer Weaponry #1 - Busted. An urban legend sent in by a viewer claimed that a set of SKS rifles inside a car with a very large, powerful sound system were set off when the driver turned the volume up to impress a group of girls. The freesliding firing pin in SKS rifles made this myth possible, but after repeated tests with a modified car, a car with an extraordinary sound system provided by the manufacturer of the system and tests at Meyer Sound they were unable to recreate the results in any way.

Woofer Weaponry #2 - Plausible. The same viewer also sent in a story about police investigating an explosion finding spent shell casings apparently fired accidentally from SKS rifles, apparently having gone off as a result of the explosion - again, due to the freesliding firing pin. One of the four rifles in their test did fire.

Handgun Horror - Confirmed. Jamie and Adam viewed a photograph of a person's severed finger. This was, apparently, caused by holding a powerful hunting handgun incorrectly with the fingers of the non-firing hand held too close to the chamber. The explosive gases released by the gun during the firing process tore the person's finger off. Jamie and Adam created human hand substitutes using chicken bones. Jamie's hand was damaged but the "finger" did not come off but Adam's more accurate hand lost one finger.
 
Woofer Weaponry #1 - Busted. An urban legend sent in by a viewer claimed that a set of SKS rifles inside a car with a very large, powerful sound system were set off when the driver turned the volume up to impress a group of girls. The freesliding firing pin in SKS rifles made this myth possible, but after repeated tests with a modified car, a car with an extraordinary sound system provided by the manufacturer of the system and tests at Meyer Sound they were unable to recreate the results in any way.

They needed to play gangsta rap, no "pink noise" is going to set off those weapons.
 
For the gun myth, I would have liked to see them physically shake the SKS rifles to see if the could be set off by shaking them. They could have put have it one in a rig that shakes the rifle vertically up and down. I was curious how easy it would have been to set one off.
 
I always like when the Mythbusters play with thermite, I wanted them to try around a little more with that myth. I was a little disappointed when that part was over so quickly although the episode was even named after the myth.
 
Woofer Weaponry #1 - Busted. An urban legend sent in by a viewer claimed that a set of SKS rifles inside a car with a very large, powerful sound system were set off when the driver turned the volume up to impress a group of girls. The freesliding firing pin in SKS rifles made this myth possible, but after repeated tests with a modified car, a car with an extraordinary sound system provided by the manufacturer of the system and tests at Meyer Sound they were unable to recreate the results in any way.

They needed to play gangsta rap, no "pink noise" is going to set off those weapons.

Grant Imahara says they did use music but had to cut it out because of copyright.
 
I couldn't help but wonder why in their scaled-up thermite rig they built a little ice "house" instead of a "pyramid". It seems to me that the thermite is only going to react with the ice put directly underneath it, which is why the small rig puts the thermite on top of the stack of ice. In the large rig they kind of built a little igloo with a tub of thermite in the middle, lol. I wonder if there was some logistical reason they did that.
 
For the gun myth, I would have liked to see them physically shake the SKS rifles to see if the could be set off by shaking them. They could have put have it one in a rig that shakes the rifle vertically up and down. I was curious how easy it would have been to set one off.

my SKS has never "gone off" from a shock
 
did the look at how much force the firing pin strikes with and how force it takes fire the bullet. Now if I understand a gun discharghing when it's dropped but I couldn't see one going of from having the firing pin slide forward to due to sound vibration.
 
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