Hiroshima

Hiroshima — marelibri

Blueprints of the "Little Boy" Atomic Bomb with handwritten explanation of its components by the Weapons Test Officer of the Enola Gay

réf. 12518Little Boy was the code name of the atomic bomb which was dropped on Hiroshima on August 6 1945 by the 12-man crew of the B-29 Superfortress Enola Gay. Here we have a black and white copy of a Blue print showing the first atomic bomb with handwritten explanations of the components and how it works in the hand of a crew member who dropped this bomb on Hiroshima Enola Gay's Weapons Test Officer Jeppson. Jeppson was one of only 2 men who was both at Los Alamos during the development and testing of the bomb and also on board the Enola Gay when it dropped the bomb. Jeppson has made handwritten notations showing where a bullet of U235 shoots into a mass of U235 to create a the atomic explosion. He writes on the blueprint pointing out where the "uranium bullet" is that shoots in "the uranium target ring" and explanations on how it worked. The design was a very conservative one that was as certain to work as any untested device can be. The design was complete by February 1945 and the actual bomb was ready for combat use by early May 1945 - except for the U-235 pit. The Little Boy design used the gun method to explosively force a sub-critical mass of uranium-235 and three U-235 target rings together into a supercritical mass initiating a nuclear chain reaction. This was accomplished by simply shooting one piece of the uranium the "projectile U235" into the other namely the "target U235" by means of a chemical explosives. Here Morris Jeppson the Weapons Test Officer of the Enola Gay has made handwritten notations explaining the main different parts of this Atomic Bomb he writes: "Little Boy Bomb Weight about 5 tons". He draws arrows labeling the "target U235" where the projectile 235 should hit. He points out the "hook to hang bomb in B29" that held the Bomb to the Enola Gay the write "projectile U235" pointing to the bullet of U235 that will shout into the target . On the margin he explains in his hand: "The design of Little Boy used the gun assembly method. The bullet of U235 impacting the target of U235 produces a critical mass in a very short period of time - and the heavy nose casing contains critical conditions long enough for the nuclear reaction to proceed. During the flight I removed 3 green electrical plugs and replaced them with red coded plugs. This allowed the detonation voltage to go from fusing to the explosive that fired the projectile of U235 into the target of U235 when the bomb reached about 1500 feet above Hiroshima. Underneath his explanation he signs "Morris Jeppson/ Weapons Test Officer/ Enola Gay Mission/ HIROSHIMA - 6 Aug. 1945" . The bomb was armed in flight then Jeppson removed the safety plugs as describes on the document and as such was the last to touch Little Boy before it was dropped at approximately 8:15 a.m. JST. Approximately 70000 people were killed as a direct result of the blast and a similar number were injured. Measure approx. 18" x 24". In excellent condition. unknown books

Max Rambod Inc. · États-Unis2 500,00 $US≈ 2 229,16 €

Theodore Van Kirk; Hiroshima Atomic BombBiblio.com

Cold War Nuclear History Theodore Dutch Van Kirk Signed Book Critiquing Account of the Hiroshima Atomic Bomb Mission

1945réf. 114571945. Marx Joseph L. Seven Hours to Zero. 1967 account of the planning and execution of the atomic bombing of Hiroshima containing a signed annotation by Theodore J. "Dutch" Van Kirk navigator of the B 29 bomber Enola Gay. The book addresses the events leading to the United States' use of atomic weapons against Japan on August 6 1945 the mission that introduced nuclear warfare into modern military history and contributed directly to the end of the Second World War in the Pacific. Van Kirk one of the three principal crew members aboard the aircraft that delivered the uranium bomb over Hiroshima inscribed the title page with a critical assessment of the narrative: "A generally good account of our mission to drop the first atomic bomb over Hiroshima. There are a few historical discrepancies as memories fade after the fact. Theodore J 'Dutch' Van Kirk Navigator Enola Gay August 6 1945." The inscription provides a firsthand comment by a participant whose navigational calculations guided the aircraft to its target during the mission. Marx Joseph L. Seven Hours to Zero. New York: Putnam 1967. Signed commentary by Theodore J. "Dutch" Van Kirk on the title page. Hardback with dust jacket. The volume presents a narrative reconstruction of the hours leading to the Hiroshima bombing and the military planning undertaken by the United States Army Air Forces during the closing phase of the Pacific War. Van Kirk's handwritten note identifies his role as navigator of the Enola Gay and directly addresses the historical accuracy of the work. The Hiroshima mission represented a turning point in twentieth century military and political history demonstrating the destructive capacity of nuclear weapons and initiating the nuclear age that shaped Cold War international relations. Theodore J. "Dutch" Van Kirk served as navigator under pilot Paul W. Tibbets and bombardier Thomas Ferebee during the mission determining the flight path that brought the aircraft over Hiroshima on the morning of August 6 1945. Inscribed copies of historical works by individuals directly involved in the atomic bombing provide documentary testimony from participants whose recollections and interpretations continue to influence debates over nuclear warfare military decision making and the closing stages of the Second World War. Light handling wear to dust jacket and boards consistent with age. Overall condition very good. unknown

Max Rambod Inc. · États-Unis950,00 $US≈ 847,08 €

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