News

on video HOW FAT MAN WORKS ? | Nuclear Bomb ON Nagasaki | WORLD'S BIGGEST NUCLEAR BOMB | Learn from the base

 


An explosive nuclear chain reaction occurs when a sufficient quantity of nuclear fuel, such as uranium or plutonium, is brought together to form a critical mass. This is the minimum amount of fissionable material needed to start a chain reaction. The chain reaction starts when neutrons strike the heavy uranium or plutonium nucleus which splits releasing a tremendous amount of energy along with two or more neutrons which, in turn split more nuclei, and so on. For more information, see The Science Behind the Atom Bomb.

 

Little Boy
In this gun-type device, the critical mass is achieved when a uranium projectile which is sub-critical is fired through a gun barrel at a uranium target which is also sub-critical. The resulting uranium mass comprised of both projectile and target becomes critical and the chain reaction begins. Dropped on the Japanese city of Hiroshima on August 6, 1945, it was the first nuclear weapon used in a war.

Weight: 9,700 lbs
Length: 10 ft.; Diameter: 28 in.
Fuel: highly enriched uranium; “Oralloy”
Uranium Fuel: approx. 140 lbs; target - 85 lbs and projectile - 55 lbs
Target case, barrel, uranium projectile, and other main parts ferried to Tinian Island via USS Indianapolis
Uranium target component ferried to Tinian via C-54 aircraft of the 509th Composite Group
Efficiency of weapon: poor
Approx. 1.38% of the uranium fuel actually fissioned
Explosive force: 15,000 tons of TNT equivalent
Use: Dropped on Japanese city of Hiroshima; August 6, 1945
Delivery: B-29 Enola Gay piloted by Col. Paul Tibbets
 

Fat Man
"Fat Man" was the second plutonium, implosion-type bomb. The first was the “Gadget” detonated at the Trinity site on July 16, 1945. In the implosion-type device, a core of sub-critical plutonium is surrounded by several thousand pounds of high-explosive designed in such a way that the explosive A force of the HE is directed towards crushing the plutonium core into a supercritical state. Dropped on the Japanese city of Nagasaki on August 9, 1945, it was the second nuclear weapon used in a war.

Fat Man being prepared for an airfield trip Weight: 10,800 lbs
Length: 10 ft 8 in.; Diameter: 60 in.
Fuel: highly enriched plutonium 239
Plutonium Fuel: approx. 13.6 lbs; approx. size of a softball
Plutonium core surrounded by 5,300 lbs of high explosives; plutonium core reduced to the size of a tennis ball
Bomb Initiator: Beryllium - Polonium
All components of Fat Man ferried to Tinian Island aboard B-29's of the 509th Composite Group
Efficiency of weapon: 10 times that of Little Boy
Approximately 1 kilogram of plutonium fissioned
Explosive force: 21,000 tons of TNT equivalent
Use: Dropped on Japanese city of Nagasaki; August 9, 1945
Nuclear Weaponeer: Cdr. Frederick Ashworth
Delivery: B-29 Buckscar piloted by Maj. Charles Sweeney
 .


An explosive nuclear chain reaction occurs when a sufficient quantity of nuclear fuel, such as uranium or plutonium, is brought together to form a critical mass. This is the minimum amount of fissionable material needed to start a chain reaction. The chain reaction starts when neutrons strike the heavy uranium or plutonium nucleus which splits releasing a tremendous amount of energy along with two or more neutrons which, in turn split more nuclei, and so on. For more information, see The Science Behind the Atom Bomb. Little Boy In this gun-type device, the critical mass is achieved when a uranium projectile which is sub-critical is fired through a gun barrel at a uranium target which is also sub-critical. The resulting uranium mass comprised of both projectile and target becomes critical and the chain reaction begins. Dropped on the Japanese city of Hiroshima on August 6, 1945, it was the first nuclear weapon used in a war. Weight: 9,700 lbs Length: 10 ft.; Diameter: 28 in. Fuel: highly enriched uranium; “Oralloy” Uranium Fuel: approx. 140 lbs; target - 85 lbs and projectile - 55 lbs Target case, barrel, uranium projectile, and other main parts ferried to Tinian Island via USS Indianapolis Uranium target component ferried to Tinian via C-54 aircraft of the 509th Composite Group Efficiency of weapon: poor Approx. 1.38% of the uranium fuel actually fissioned Explosive force: 15,000 tons of TNT equivalent Use: Dropped on Japanese city of Hiroshima; August 6, 1945 Delivery: B-29 Enola Gay piloted by Col. Paul Tibbets Fat Man "Fat Man" was the second plutonium, implosion-type bomb. The first was the “Gadget” detonated at the Trinity site on July 16, 1945. In the implosion-type device, a core of sub-critical plutonium is surrounded by several thousand pounds of high-explosive designed in such a way that the explosive A force of the HE is directed towards crushing the plutonium core into a supercritical state. Dropped on the Japanese city of Nagasaki on August 9, 1945, it was the second nuclear weapon used in a war. Fat Man being prepared for an airfield trip Weight: 10,800 lbs Length: 10 ft 8 in.; Diameter: 60 in. Fuel: highly enriched plutonium 239 Plutonium Fuel: approx. 13.6 lbs; approx. size of a softball Plutonium core surrounded by 5,300 lbs of high explosives; plutonium core reduced to the size of a tennis ball Bomb Initiator: Beryllium - Polonium All components of Fat Man ferried to Tinian Island aboard B-29's of the 509th Composite Group Efficiency of weapon: 10 times that of Little Boy Approximately 1 kilogram of plutonium fissioned Explosive force: 21,000 tons of TNT equivalent Use: Dropped on Japanese city of Nagasaki; August 9, 1945 Nuclear Weaponeer: Cdr. Frederick Ashworth Delivery: B-29 Buckscar piloted by Maj. Charles Sweeney Photos courtesy the National Archives and an illustrated guide to the atomic bombs by Ryan Crierie.

No comments