There was poor visibility due to cloud cover and the bomb missed its intended detonation point by almost two miles, so the damage was somewhat less extensive than that in Hiroshima. The depleted uranium tamper was an 8.75-inch (222 mm) diameter sphere, surrounded by a 0.125-inch (3.2 mm) thick shell of boron-impregnated plastic. It was the second of the only two nuclear weapons ever used in warfare, the first being Little Boy, and its detonation marked the third-ever man-made nuclear explosion in history. Fat Frog 8. Fat Hooker 10. , Mitsubishi's industrial production in the city was also severed by the attack; the dockyard would have produced at 80 percent of its full capacity within three to four months, the steelworks would have required a year to get back to substantial production, the electric works would have resumed some production within two months and been back at capacity within six months, and the arms plant would have required 15 months to return to 60 to 70 percent of former capacity. 43rd Bomb Wing 65th Bomb Squadron B-58 Hustler Model. This kit does not only depict the right proportions of the weapon but gives the possibility to the model maker to show the internals. Age: 72 years old Classification: Atomic Bomb Wielders: United States of America Removing the bomb rails allowed a maximum width of 5.5 feet (1.7 m). A crucial requirement was that the pieces be brought together in a time shorter than the time between spontaneous fissions. Wallace Akers, the director of the British "Tube Alloys" project, told James Bryant Conant on 14 November that James Chadwick had "concluded that plutonium might not be a practical fissionable material for weapons because of impurities.  Later versions included the Y-1560, which had 72 detonators; the Y-1561, which had 32; and the Y-1562, which had 132. With Paul Newman, Dwight Schultz, Bonnie Bedelia, John Cusack. The bomb dropped over Hiroshima was a uranium gun-type atomic bomb with codename ‘Little Boy’ while the one dropped on Nagasaki was a plutonium implosion-type atomic bomb with codename ‘Fat Man’. Released by the B-29 Bockscar, the 10,000-pound weapon was detonated at an altitude of approximately 1,800 feet over the city. , The explosion symmetrically compressed the plutonium to twice its normal density before the "Urchin" added free neutrons to initiate a fission chain reaction. However, this still constrained the bomb to a maximum length of 11 feet (3.4 m), width of 5 feet (1.5 m) and weight of 20,000 pounds (9,100 kg). The footage also depicts the mushroom cloud above Nagasaki. Dropped on the Japanese city of Nagasaki on August 9, 1945, it was the second nuclear weapon used in a war. Los Alamos's Thin Man and Fat Man code names were adopted by the United States Army Air Force. This has a far higher spontaneous fission rate and radioactivity than plutonium-239. Three days later, the U.S. dropped a second bomb, "Fat Boy," on Nagasaki killing an estimated 40,000 on August 9. , Drop tests began in March 1944, and resulted in modifications to the Silverplate aircraft due to the weight of the bomb.  About 30% of the yield came from fission of the uranium tamper. , Oppenheimer reviewed his options in early 1943 and gave priority to the gun-type weapon, but he created the E-5 Group at the Los Alamos Laboratory under Seth Neddermeyer to investigate implosion as a hedge against the threat of pre-detonation. Without the availability of the B-29, dropping the bomb would likely have been impossible. This was the second of two bombs dropped on Japan that helped bring a swift end to World War II. The bombs, known as "Little Boy" and "Fat Man," were loaded onto bombers at the North Field airbase on Tinian Island in the Northern Mariana Islands, which are south of Japan. A "Fat Man" bomb was dropped over Nagasaki, Japan, on Aug. 9, 1945, near the end of World War II. The fuzing of these bombs is the same except that the Tail Fuzes AN-Mk 230 and Mods and Mk 240 Mod 0 can be used in the 1,000-pound GP Bomb AN-M65, since this bomb has the Adapter Booster M115 (or M115A1). F33 was expended near Tinian during a final rehearsal on 8 August. The Hiroshima Little Boy bomb used a total of 140 pounds of uranium-235. It was placed inside its ellipsoidal aerodynamic bombshell and wheeled out, where it was signed by nearly 60 people, including Purnell, Brigadier General Thomas F. Farrell, and Parsons. Dead Baby Boy 2. "Little Boy" would come last and be named only to contrast to the "Thin Man" bomb. The name “Fat Boy” was supposedly formed from the nicknames “Fat Man” and “Little Boy,” the designations given to the two atomic bombs dropped on Japan. Party Boy 17. The two weapons yielded about 23 kilotonnes (96 TJ) each. It was nicknamed Fat Man . $29.50.  The pit was warm to touch, emitting 2.4 W/kg-Pu, about 15 W for the 6.19 kilograms (13.6 lb) core. 64 kg of Uranium-235, about 1.38% of the uranium fissioned Nagasaki's "Fat Man" gravity bomb 19–23 79–96 , This article is about the World War II nuclear weapon.  Some 120 Mark III Fat Man units were added to the stockpile between 1947 and 1949 when it was superseded by the Mark 4 nuclear bomb. This handy little baby packs all the power of a nuclear bomb, with little of the clean up! For other uses, see, Codename for the type of atomic bomb that was detonated over the Japanese city of Nagasaki on 9 August 1945, The detonation wave (arrows) is initially, Video footage of the bombing of Nagasaki (silent), detonated over the Japanese city of Nagasaki, National Museum of the United States Air Force, Atomic bombings of Hiroshima and Nagasaki, "Bockscar … The Forgotten Plane That Dropped The Atomic Bomb « A Little Touch Of History", Columbia university center for nuclear studies: Hiroshima and Nagasaki: The Long Term Health Effects, "United States Strategic Bombing Survey Summary Report (Pacific War) The Effects Of The Atomic Bombs", "Section 8.1.1 The Design of Gadget, Fat Man, and "Joe 1" (RDS-1)", "Plutonium: A Wartime Nightmare but a Metallurgist's Dream", "The yields of the Hiroshima and Nagasaki nuclear explosions", "Atomic John: A truck driver uncovers secrets about the first nuclear bombs", https://en.wikipedia.org/w/index.php?title=Fat_Man&oldid=999594063, Cold War aerial bombs of the United States, World War II weapons of the United States, World War II aerial bombs of the United States, Short description is different from Wikidata, All Wikipedia articles written in American English, Creative Commons Attribution-ShareAlike License. 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