Fat Man

E13442

atomic bomb nuclear weapon plutonium implosion-type nuclear bomb

Fat Man was the plutonium implosion-type nuclear bomb detonated over Nagasaki, Japan, in August 1945, contributing to the end of World War II.

Aliases (4)

Statements (47)

Predicate	Object
instanceOf	atomic bomb → nuclear weapon → plutonium implosion-type nuclear bomb →
casualtiesCategory	mass civilian casualties →
codeName	Fat Man →
coreShape	plutonium pit with tamper →
countryOfOrigin	United States →
dateOfDetonation	1945-08-09 →
deliveredBy	United States Army Air Forces →
deliveryAircraft	B-29 Bockscar →
deliveryMethod	air-dropped bomb →
designer	George Kistiakowsky → John von Neumann → Robert Serber → Seth Neddermeyer →
designType	implosion-type →
detonatedOver	Japan → Nagasaki →
detonationHeight	about 500 m above ground →
developedBy	Los Alamos Laboratory → Manhattan Project →
diameter	1.52 m →
effectOnWar	contributed to the end of World War II →
era	Cold War precursor technology →
firstCombatUse	1945-08-09 →
fuzingSystem	contact and radar fuzes →
historicalSignificance	second nuclear weapon used in war →
length	3.25 m →
locationOfAssemblyBeforeMission	Tinian →
nicknameOrigin	named for its bulbous shape →
nuclearMaterial	plutonium-239 →
numberOfExplosiveLenses	32 →
oneOfOnlyNuclearWeaponsUsedInWarfare	true →
operator	509th Composite Group →
otherCombatNuclearWeapon	Little Boy →
predecessor	Trinity test device →
productionStart	1945 →
purpose	to force Japanese surrender in World War II →
relatedTest	Trinity nuclear test →
targetCity	Nagasaki →
usedBy	United States Armed Forces →
usedInConflict	World War II →
warTheater	Pacific War →
weaponCategory	weapon of mass destruction →
weight	about 4,670 kg →
yieldTNTEquivalent	21 kilotons → 21000 tons of TNT →

Referenced by (21)

Subject (surface form when different)	Predicate
Nagasaki → Urakami district of Nagasaki →	bombNickname
Manhattan Engineer District ("Fat Man atomic bomb") → Project Y →	notableProject
B Reactor ("Fat Man nuclear bomb") → B Reactor ("Fat Man nuclear bomb") →	producedPlutoniumFor
V-Site buildings ("Fat Man atomic bomb") →	associatedWithWeapon
509th Composite Group →	bombTypeUsed
B-29 Superfortress ("Fat Man atomic bomb") →	carried
Fat Man →	codeName
Bockscar →	deliveredWeapon
Los Alamos Laboratory →	developed
Little Boy →	followedBy
atomic bombing of Nagasaki →	hasCodeName
Trinity test device ("Fat Man nuclear bomb") →	influenced
Project Alberta ("Fat Man atomic bomb") →	notableWork
Hanford Site ("Fat Man atomic bomb") →	producedMaterialFor
The Gadget →	relatedWeapon
Trinity test device ("Fat Man bomb design") →	similarTo
Project Alberta ("Fat Man–type implosion device") →	testedDevice
atomic bombings of Hiroshima and Nagasaki →	weaponUsedAtNagasaki