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PostPosted: Wed Dec 07, 2011 10:40 am 
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Yikes. I have to admit I kind of wanted some random person to get hurt, just to make the incident famous.


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PostPosted: Wed Dec 07, 2011 10:56 am 
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:shock:

High explosives and electricity! Woo!

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PostPosted: Wed Dec 07, 2011 12:16 pm 
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Something seemed really off when i read the description of the incident (didn't watch the video) the cannon ball seemed to have way to much inertia for all the things it had supposedly went through.

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PostPosted: Wed Dec 07, 2011 12:29 pm 
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Nope. A cannon ball is a very massive object. The weapon is designed to fire through ship hulls and stone fortifications. It will punch through aluminum siding, insulation, and drywall like it's nothing. It's more likely to miss the support studs than hit them, too.

The cannon is still in use by the United States military, we just changed the shape of the ball.

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PostPosted: Wed Dec 07, 2011 12:36 pm 
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Corolinth wrote:
Nope. A cannon ball is a very massive object. The weapon is designed to fire through ship hulls and stone fortifications. It will punch through aluminum siding, insulation, and drywall like it's nothing. It's more likely to miss the support studs than hit them, too.


I understand the mass that it has but here is the description I read about it

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The cantaloupe-sized cannonball missed the water, tore through a cinder-block wall, skipped off a hillside and flew some 700 yards east, right into the Tassajara Creek neighborhood, where children were returning home from school at 4:15 p.m., authorities said.

There, the 6-inch projectile bounced in front of a home on quiet Cassata Place, ripped through the front door, raced up the stairs and blasted through a bedroom, where a man, woman and child slept through it all - only awakening because of plaster dust.

The ball wasn't done bouncing.

It exited the house, leaving a perfectly round hole in the stucco, crossed six-lane Tassajara Road, took out several tiles from the roof of a home on Bellevue Circle and finally slammed into the Gill family's beige Toyota Sienna minivan in a driveway on Springvale Drive.

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PostPosted: Wed Dec 07, 2011 12:45 pm 
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Ouch


Show is probably over now.

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PostPosted: Wed Dec 07, 2011 1:18 pm 
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It skipped off the ground and ripped through a civilian house. That sounds impressive if you don't realize that a house is mostly empty space. so are its walls. Chances are the only thing it hit was drywall and fiberglass insulation, both of which are like paper to a cannon. Again, this is a military weapon designed to blow apart warships and stone fortifications. That is what it does. It's designed to put holes in the stone walls of a European castle.

The cannonball also bounced. Objects do that when they strike other objects. Especially if they do so at an angle. Especially if they're round.

Cannons are the original WMD. There is a reason that they are still being used by modern armies.

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PostPosted: Wed Dec 07, 2011 4:24 pm 
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Squirrel Girl wrote:
Ouch


Show is probably over now.

NOOOOOOOOOO!!!!!!!!!!


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PostPosted: Wed Dec 07, 2011 4:28 pm 
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Killuas wrote:
Something seemed really off when i read the description of the incident (didn't watch the video) the cannon ball seemed to have way to much inertia for all the things it had supposedly went through.


Not really, sounds about right to me, according to the report it was traveling at 1000ft/second and a 6" steel cannon ball is around 32 pounds (assuming it's solid which i'm sure it was), an object that heavy traveling that fast has a lot of kinetic energy, about the same as a 3000 pound car traveling at 70mph, and given it's relatively small size it will punch the same object significantly easier with far less loss of kinetic energy than said car, and a car traveling that fast into a house would demolish the house.


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PostPosted: Wed Dec 07, 2011 4:49 pm 
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Sasandra wrote:
Not really, sounds about right to me, according to the report it was traveling at 1000ft/second and a 6" steel cannon ball is around 32 pounds (assuming it's solid which i'm sure it was), an object that heavy traveling that fast has a lot of kinetic energy, about the same as a 3000 pound car traveling at 70mph, and given it's relatively small size it will punch the same object significantly easier with far less loss of kinetic energy than said car, and a car traveling that fast into a house would demolish the house.


Nice...

And unlike that car, the ball doesn't take any significant damage when it hits something.

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PostPosted: Wed Dec 07, 2011 4:52 pm 
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That's actually one of the things that causes the ball to keep going. None of its kinetic energy is lost through deformation.

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PostPosted: Wed Dec 07, 2011 4:55 pm 
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Corolinth wrote:
That's actually one of the things that causes the ball to keep going. None of its kinetic energy is lost through deformation.
We're also talking about a 10" cannonball ...

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PostPosted: Wed Dec 07, 2011 4:57 pm 
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Talya wrote:
Sasandra wrote:
Not really, sounds about right to me, according to the report it was traveling at 1000ft/second and a 6" steel cannon ball is around 32 pounds (assuming it's solid which i'm sure it was), an object that heavy traveling that fast has a lot of kinetic energy, about the same as a 3000 pound car traveling at 70mph, and given it's relatively small size it will punch the same object significantly easier with far less loss of kinetic energy than said car, and a car traveling that fast into a house would demolish the house.


Nice...

And unlike that car, the ball doesn't take any significant damage when it hits something.

Maybe the automotive industry could take something away from this and rethink their designs for cars.. people in gigantic hamster balls rolling around the freeways like pinballs is oddly appealing to me


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PostPosted: Wed Dec 07, 2011 4:58 pm 
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Corolinth wrote:
That's actually one of the things that causes the ball to keep going. None of its kinetic energy is lost through deformation.

Yeah, that's what I was referring to.

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PostPosted: Wed Dec 07, 2011 5:14 pm 
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PostPosted: Wed Dec 07, 2011 5:18 pm 
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bale wrote:
Maybe the automotive industry could take something away from this and rethink their designs for cars.. people in gigantic hamster balls rolling around the freeways like pinballs is oddly appealing to me

Whether or not the automotive industry takes anything away from this, smart money has always been put on the largest of any two vehicles in an accident.

My advice to parents with kids who have just gotten the licenses has always been to have them drive a big *** two seater truck. They're not able to have too many kids along with them and if they have an accident, chances are greater that they'll have a easier time of it, wrapped as they are in all that metal.

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PostPosted: Wed Dec 07, 2011 6:09 pm 
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That's actually not true. The reason cars fold up like sardine cans is precisely because doing so absorbs the energy of the collisions.

There are three impacts that occur in a car crash.

1) Car on object
2) Person on windshield
3) Internal organs on ribcage

When your car abruptly stops because you hit a wall or a tree, with no deformation to the car, you are now going out the windshield. We solved that problem by having seatbelts. Now you're no longer going through the windshield. Instead, your heart and lungs splatter against the inside of your body at whatever speed your car was traveling prior to the crash. Let's say we're on the highway, so 70mph.

The only way to protect you from having your internal organs splatter against the interior walls of your body is to give you an acceleration that is not instantaneous. Crumple zones and airbags slow you down rather than stop you instantly.

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PostPosted: Wed Dec 07, 2011 6:18 pm 
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OK Coro, you drive at me head-on at 50 MPH in a Mini and I'll drive at you head-on at 50 MPH in my Ram 1500 truck, then you tell me it's not true.

www-nrd.nhtsa.dot.gov/pdf/Esv/esv16/98S3O08.PDF

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Compatibility in Car-to-Car Frontal Collision - Car mass is one of the most significant factors affecting driver injury in car-to-car collisions. It is well known that the fatality rate of the driver decreases with car mass. Evans [1993] found that the ratio of the injury rate in a lighter car to that in a heavier one may be expressed by the power ratio of the car mass of the heavier car to that of the lighter car. In the present study, the individual injury rate is expressed by average car mass ratio.

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PostPosted: Wed Dec 07, 2011 7:00 pm 
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Head on collisions, especially those occurring at highway speeds, are a small fraction of all car crashes. Moreover, there is no way to make such a collision safe, making that a false dilemma.

In your big truck, you are far more likely to, oh I don't know, hit a lamp post or a tree. The impact will probably occur at something like 20mph. In your big truck, surrounded by all that metal, that's likely to cause you serious injuries despite being a big truck that protects you with all of that metal. That's why big trucks are made with crumple zones just like the small cars.

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PostPosted: Wed Dec 07, 2011 10:52 pm 
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Taskiss wrote:
OK Coro, you drive at me head-on at 50 MPH in a Mini and I'll drive at you head-on at 50 MPH in my Ram 1500 truck, then you tell me it's not true.

www-nrd.nhtsa.dot.gov/pdf/Esv/esv16/98S3O08.PDF

Quote:
Compatibility in Car-to-Car Frontal Collision - Car mass is one of the most significant factors affecting driver injury in car-to-car collisions. It is well known that the fatality rate of the driver decreases with car mass. Evans [1993] found that the ratio of the injury rate in a lighter car to that in a heavier one may be expressed by the power ratio of the car mass of the heavier car to that of the lighter car. In the present study, the individual injury rate is expressed by average car mass ratio.


Yup, though not entirely because there's more metal around you, more metal does mean a larger crumple zone which lessens the G forces on the driver, but also because more mass means more kinetic energy, so it takes more to slow the vehicle down, slower deceleration time means less G forces on the body and thus less likely to be injured or killed. That's actually one of the biggest reasons why I would rather a larger car over a smaller one.


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PostPosted: Wed Dec 07, 2011 11:04 pm 
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One of the more common idiot injuries in the Napoleonic era wars was an infantryman losing a foot or lower leg when he tried to stop a cannon ball rolling along the ground. They don't look all that big or like they are going all that fast, but they still have the mass and force to do serious injury.

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PostPosted: Wed Dec 07, 2011 11:11 pm 
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Its unlikely the show will be shut down. In the how many years of them doing crazy stuff... this is the first "accident"...

MB is too large a cash cow for Discovery for them to shut it down. Besides, they were at the bomb range, with adult supervision.

Sometimes even pros roll 1s.

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PostPosted: Thu Dec 08, 2011 12:40 am 
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Corolinth wrote:
Head on collisions, especially those occurring at highway speeds, are a small fraction of all car crashes. Moreover, there is no way to make such a collision safe, making that a false dilemma.

In your big truck, you are far more likely to, oh I don't know, hit a lamp post or a tree. The impact will probably occur at something like 20mph. In your big truck, surrounded by all that metal, that's likely to cause you serious injuries despite being a big truck that protects you with all of that metal. That's why big trucks are made with crumple zones just like the small cars.

Crumple zones can still be defeated given sufficient mass and/or velocity. With greater mass, the dodge is more likely to suffer less damage than the mini (sheesh, Taskiss, why didn't you go for the Smart FourTwo? ;)), unless the mini's velocity is significantly greater than the dodge.
Purposefully designed crumple zones are a relatively recent development in automobile design. So let's take it out. So now your choice is a Model T vs a locomotive with a 1/4 mile long train of boxcars. The train is going 45 mph. The Model T's speed and direction can be variable, so long as a collision with the train occurs. Which vehicle would you rather be in?

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PostPosted: Thu Dec 08, 2011 9:22 am 
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Squirrel Girl wrote:
Ouch


Show is probably over now.

I doubt it, this is not their first mishap. If memory serves they broke every window in a town when they tested an explosion previously.

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PostPosted: Thu Dec 08, 2011 9:51 am 
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Hopwin wrote:
Squirrel Girl wrote:
Ouch


Show is probably over now.

I doubt it, this is not their first mishap. If memory serves they broke every window in a town when they tested an explosion previously.


Yep, detonated 500 lbs of ammonium nitrate. :)

http://gizmodo.com/5185629/mythbusters-explosion-breaks-windows-tosses-women-off-couches


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