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Edited by Christian Lowe | Contact

"Deadlies" Nominee: Nuke Bazooka

Nominated by Steve Weintz

You can't have a contest to find the most hazardous equipment of all time without including the legendary Davy Crockett -- the tripod-mounted, atomic artillery launcher that inspired Starship Troopers' nuclear bazooka.

davy4.jpgThe Davy Crockett came in two flavors, 120mm and 155mm. Both used the same round -- an itty-bitty nuclear warhead, with a yield equal to "only" 10 to 20 tons of TNT (about what took down the Alfred R. Murrah Building in Oklahoma City). Maximum range was 2.5 miles for the bigger model, half that for the mini. Which meant that the Davy's three-man crew would survive the initial atomic blast. If they fired the shell perfectly, that is. Unfortunately, "both recoilless rifles proved to have poor accuracy in testing," Wikipedia notes.

But even if the Davy's crew managed to make it past the first few seconds of their weapon's firing, they still had to contend with the subsequent radiation. The minimum detonation range for the Davy was 1000 feet. The problem is, the explosion kicked off an "almost instantly lethal radiation dosage (in excess of 10,000 rem) within 500 feet (150 m), and a probably fatal dose (around 600 rem) within a quarter mile (400 meters)."

The Davy Crockett's warheads were tested twice, in 1962. 2,100 of the things were manufactured and deployed with American armed forces, until the Davy was retired in 1971.

Got an idea for a "Deadly?" E-mail or post your picks.

Comments

http://www.youtube.com/user/WTCnucleardemolition

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I have read of the possibility of the eventual development of pure fusion weapons explosives wherein an ordinary mass of highly fusionable material has sections within it, possibly carbon buckeyballs that contain antiprotons wherein the buckybucks would be induced to release their antiprotons which would be held bound by vanderwalls forces imposed by the electron shells of the buckyballs constituent carbon atoms. Upon release from the buckyballs, the antiprotons would interact with the protons within the hydrogen or other fusionable fuel and induce thermal motion of differential volumetric elements of the fuel along with the release of ionizing radiation which could result potentially in the spread of the fusion reaction throughout the mass of fusionable fuel.

For pure H1 fuel, the net energy release upon fusion as in the proton proton reaction sequence if it could be sustained would result in about 1 percent of the lumps mass being converted into energy. Thus, a one kilogram explosive charge of such fuel would yield about 250 kilotons which is about a two order of magnitude or a factor of a 100 times greater mass specific yield then the current most effecient warheads. Note that the W-88 warhead has a yield of about 300 kilotons while having a mass of about 400 pounds according to open literature on the subject. This is a staggering 25 times the yield of the 12.5 kiloton device used on Hiroshima.

Perhaps the hydrogen could be compressed into some form of the proposed stable metallic states of hydrogen that might be formed under intense pressure. Another option would be to perhaps use Lithium-Dueteride as the fuel of choice in the mass of fusionable fuel for a slight reduction in mass specific energy output of the fuel upon fusion. Yet another type of fuel might simply be carbon. Note that carbon detonation supernova are simply natures carbon fusion based thermonuclear bombs except on a massive scale and so perhaps a carbon bomb can be manufactured on a small macroscopic scale.

Another option for a nearly pure fusion fuel device might be one that utilizes something akin to a so called Z-pinch wherein high energy density storage capacitors affixed to or disposed within the fusionable fuel release a sudden burst of energy that heats up tiny electroresistive element into a 10 million K to perhaps, if possible, a 100 million + K plasma which induces the surrounding volumetric element of fusion fuel to undergo thermonuclear fusion.

One can thus imagine a 1 kilogram 250 kiloton device, a 100 kilogram 25 megaton device, a 1 metric ton 250 megaton device, and a 10 metric ton 2.5 gigaton device. A device with the mass of the large 59 megaton tested Soviet Tsar Bomba with a mass of about 30 metric tons would have a whopping yield of 7.5 gigatons. A U.S. Ohio Class nuclear ballistic missle submarine could carry about 200 25 megaton warheads using this technology as apposed to the current 200 475 kiloton W-89 warheads.

Analogous fissionable material might use highly fissionable isotopes such as U-235, certain Plutonium isotopes, certain Americium isotopes, certain Neptunium isotopes and the like wherein the chain reaction is stimulated by the sudden release of enough interiorly contained antiprotons such that the nuetron flux suddenly becomes great enough to induce a chain reaction. Given that 1 kilogram of fully fissioned fissionable material of such isotopes has a yield of about 25 kilotons, a bomb with a mass of about 3 onces would have a yield of about 2.5 kilotons. A device with the mass about one pound or that of a large hand grenade would have the yield of the hiroshima bomb.

Such technology could revolutionize warfare and strategic weapons based defense systems.

Best Regards;

Jim

Posted by: James M. Essig at December 24, 2007 10:45 PM


I can imagine a real nuclear bazooka in the sense of a shaped charge nuclear device. Such a device might have a cylindrically symmetrical mass of fissionable material inwhich a wedge shaped section has been removed and replaced with a dense radiation absorbing elemental or isotopic composition in much the same configuration as modern shaped charge high explosive armour penetrating rounds.

To detonate the round, one might design the shaped charge made of uranium 235, plutonium 239, americium 241, americium 242, thorium 233, or neptunium or the like in which critical mass would be achieved via a gun type combination mechanism wherein the shaped charge would have a pit, wedge, or other opening cut out of it such that when the device is triggered, a subcritical mass of the fissile material is shot into the trailing wedge cut out section where upon critical mass is achieved. The fissioning shaped charge then compresses the wad of leading wedge dense material into a super hot and dense plasma jet that should allow a device with a yield of only .005 Kt to .200 Kt to slice through any missle silo door, or exterior bunker door like a blow torch or hot knife through butter no matter how thick the door is or what it is made of.

Another way to achieve critical mass is to use explosive compression of the shaped charge fissile assembly with or without the inclusion of a gun type mechanism used to fire a wedge or wad of fissle material into would be trailing edge of the shaped charge. The shaped charge could be a hollowed out cylindrically shaped thick tube or it could be a solid cylinder inwhich a dense wad of material is inserted into its leading edge.
If the cylinder is hollow, then cylindrically symmetric blast waves from suitable configured high explosives could compress the cylinder until it reached critical mass/density. If the cylinder is solid fissle material, then the high explosive could still be used to compress the fissile cylinder until it reaches super critical density. Either way, super criticallity could be enhanced by a gun driven wedge or wad into any would be trailing wegde shaped cavity within the cylinder.

Another option is to use one or more nuetron reflecting material(s) within a hollow cylinder and/or outside and surrounding the hollow cylinder, or outside of a solid cylinder whereby critical mass could be significanly reduced for a cylinder having a given fissile isotope to non-fissile isotopal ratio.

Yet another option involves placing a leading wedge of U-238 or simmilar material which is not a practical fissile material by itself because of its extremely large critical mass but which can be made to undergo nuclear fission if bombarded by neutrons of the right kinetic energy range. The required neutron flux may be provided by the cylindrical shaped charge perhaps augmented or boosted with tritium which is a strong neutron emmitter when its H-3 nuclei are bombarded with nuetrons and other radiation produced from the fission of fissionable nuclei. This augmentation could be used to boost the energy flux density of the explosively propelled plasma jet especially within the core of such a jet where the initial compressional forces are much higher and therefor the temperature much greater.

Note that open literature suggests that shaped charged nuclear explosive devices can perhaps produce maximum directed energy flux concentration patterns with densities 4 to 6 orders of magnitude greater than a spherically symmetric contact burst typical of today's nuclear weapons.

In order to destroy even bigger doors, thicker doors, and/or doors made of stronger materials than currently exist, one could simply scale up the yield of the device and perhaps utilize hydrogen fusion within such a device such as in a thermonuclear analogue to the nuclear fission shaped charged bazooka described above.

Note that in writting this blog, I have never had any contact with any classified documents and have never even possessed a security clearance. The general knowlegde that is needed to under stand modern nuclear weapons, design them, and manufacture them is, perhaps somewhat unfortunately, available in book stores, the library, public journals, and over the internet.

I might be going out on a limb in what I say as follows, but if in the event that we ever make contact with unfriendly extraterrestrial beings and their space craft, or repressive and/or covertly operation aliens with less then benevolent of helpful intentions, shaped charged nuclear explosives, even low yield ones, I believe could be more than effective at destroying their space craft and all contents including aliens within, even with some sort of energy shield deployed. Remember, six orders of magnitude is the difference between 150,000,000 + pounds per square inch and 150,000,000,000,000 + pounds per square inch, between 100,000,000 K and 100,000,000,000,000 K, between 2 Mev gamma rays and 2 TeV gamma rays.

I would have to say that peak pressures, temperatures, and gamma ray energies could be increased by several additional orders of magnitude above the values stated above by using staged shaped nuclear charge explosives in which one or a series of cylindrically concentric shaped charged explosives would be internested.

Best Regards;

Jim

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Posted by: 121 at November 6, 2007 03:09 AM


Almost every instance of statistics or performance figures sited by this guy are wrong. Lets start with the only launcher was a jeep mounted 106mm recoilless rifle no 120 no 155 yield was on the order of 200 tons of TNT for the warhead and at minimum distance the base surge not radiation was the threat to the crew. Rad damage was still considerable but no where near the 10,000 Rem's sited. Finally doctrine called for use primarily in Korea fired over hills or ridge lines to the reverse slope of which anyone who has every marched in Korea will swear there is no shortage. The same warhead was used for the Genie air to air missile and the small atomic demolition munition (SADM) back pack nuke.

Other than blowing every single important fact about the weapon system I agree with the nomination.

BTW a demiled example is at the Sandia Nuclear Museum in Sandia, NM.

David Szucs

Posted by: David Szucs at November 22, 2006 02:37 PM


The blast at the OKC bombing was concentrated, focused. The destruction caused by the truck bomb was higher than the normal explosives would cause without being shaped.

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Posted by: Noah Shachtman at November 22, 2006 11:52 AM


The Davy Crockett had a yield of 0.25 kilotons (250 tons) of TNT, not "10 to 20 million tons." According to both the Nuclear Weapons Databook Volume I and US Nuclear Weapons: The Secret History by Chuck Hansen, the W54 Mark 2, used in the Davy Crockett had a yield "selectable to 0.25 kt". The Davy Crockett with the W54 was actually fired in the Little Feller I test on July 17, 1962, from a ground mounted launcher and had a programmed yield of 20 tons, detonating 20 feet above the ground 9,360 ft from the launch point.

No, I would not like to have been on the firing team for one of these, but it may well have been relatively safe when fired at a low enough yield setting.

Posted by: Mike Jacobs at November 22, 2006 10:46 AM


Surely you're joking about "10 to 20 million tons of TNT". The Davy Crockett had a yield of about 0.01 kilotons, or about 20 tons of high explosives equivalent (according to GlobalSecurity). "10 to 20 million tons" is 10-20 MT - bigger than all but the biggest thermonuclear devices ever tested. And the OKC bomb was delivered in a Ryder van, so it probably was up to a ton of material at most, probably about half a ton of HE equivalent.

Posted by: Haninah at November 22, 2006 10:40 AM


From the linked article:

"equivalent to 10 tons of TNT, or two to four times as powerful as the ammonium nitrate bomb which destroyed the Alfred P. Murrah federal building in Oklahoma City on April 19, 1995"

Two to four times the power, not equal to, what took down the building.

Posted by: m at November 22, 2006 10:39 AM


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