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.

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All labels observed (6)

Label Occurrences
Fat Man canonical 17
Fat Man atomic bomb 6
Fat Man nuclear bomb 3

Statements (47)

Predicate Object
instanceOf atomic bomb ⓘ
nuclear weapon ⓘ
plutonium implosion-type nuclear bomb ⓘ
casualtiesCategory mass civilian casualties ⓘ
codeName Fat Man self-link ⓘ
coreShape plutonium pit with tamper ⓘ
countryOfOrigin United States of America ⓘ
surface form: United States
dateOfDetonation 1945-08-09 ⓘ
deliveredBy United States Army Air Forces ⓘ
deliveryAircraft Bockscar ⓘ
surface form: 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 test device ⓘ
surface form: 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 (29)

Full triples — surface form annotated when it differs from this entity's canonical label.

Los Alamos Laboratory → developed → Fat Man ⓘ
Hanford Site, Washington → producedMaterialFor → Fat Man ⓘ
subject surface form: Hanford Site
this entity surface form: Fat Man atomic bomb
atomic bombing of Nagasaki → hasCodeName → Fat Man ⓘ
MED → notableProject → Fat Man ⓘ
subject surface form: Manhattan Engineer District
this entity surface form: Fat Man atomic bomb
B Reactor → producedPlutoniumFor → Fat Man ⓘ
this entity surface form: Fat Man nuclear bomb
Project Y → notableProject → Fat Man ⓘ
Fat Man → codeName → Fat Man self-link ⓘ
The Gadget → relatedWeapon → Fat Man ⓘ
Trinity test device → similarTo → Fat Man ⓘ
this entity surface form: Fat Man bomb design
Trinity test device → influenced → Fat Man ⓘ
this entity surface form: Fat Man nuclear bomb
atomic bombings of Hiroshima and Nagasaki → weaponUsedAtNagasaki → Fat Man ⓘ
B-29 Superfortress → carried → Fat Man ⓘ
this entity surface form: Fat Man atomic bomb
Bockscar → deliveredWeapon → Fat Man ⓘ
Urakami district of Nagasaki → bombNickname → Fat Man ⓘ
Hanford production reactors → producedPlutoniumFor → Fat Man ⓘ
subject surface form: B Reactor
this entity surface form: Fat Man nuclear bomb
Nagasaki → bombNickname → Fat Man ⓘ
Little Boy → followedBy → Fat Man ⓘ
Project Alberta → notableWork → Fat Man ⓘ
this entity surface form: Fat Man atomic bomb
Project Alberta → testedDevice → Fat Man ⓘ
this entity surface form: Fat Man–type implosion device
V-Site buildings → associatedWithWeapon → Fat Man ⓘ
this entity surface form: Fat Man atomic bomb
509th Composite Group → bombTypeUsed → Fat Man ⓘ
Los Alamos Primer → relatedToWeapon → Fat Man ⓘ
Urakami Cathedral → destroyedBy → Fat Man ⓘ
this entity surface form: Fat Man nuclear weapon
Operation Centerboard II → weaponUsed → Fat Man ⓘ
Operation Centerboard II → bombNickname → Fat Man ⓘ
393d Bombardment Squadron → weaponDelivered → Fat Man ⓘ
The Atomic Bomb Group → usedWeapon → Fat Man ⓘ
390th Air Service Group → supportedWeapon → Fat Man ⓘ
this entity surface form: Fat Man atomic bomb
Operation Silverplate → testedWeapon → Fat Man ⓘ