In reply to grndpndr:
@Kiwikid,you seem to have a distorted view of facts here and there.
Actually thanks to the diligent uncovering of obscured (and intentionally obscured) information about Nazi efforts each year now, new insights call into question what the true facts were.
Operation Overcast recruited hundreds of Nazi scientists in various fields specifically to deny their genius from the Soviets and the obscuring of their achievements continued during the Cold War to deny clues to the Soviets. Falsehoods in particular many in respect of Heisenberg and others in respect of heavy water from Vemork are still perpetuated.
An example of the deliberate obfiscution of facts about Nazi nuclear efforts is found in NARA file G371, 3 page report by Monsanto scientists Weinberg and Nordheim to A.H Compton of Manhattan project on state of Nazi nuclear science in WW2. Dated Nov 8 1945. It posed it’s points as a series of Questions and Answers for Compton:
Point III. What was the state of German theory of the chain reaction?
Answer (C) Generally we would say their approach was in no wise inferior to ours; in some respects it was superior.
Also;
VI. What bearing does this have on publication of the parts of the PPR dealing with principles of the chain reaction?
Answer: the Germans know how to design a lattice which will work. From the practical standpoint this is all that matters. The details of elegant perturbation theory or transport theory (which would be contained in Vol. III) or the details of heat transfer calculations (Vol. IV) would tell them nothing essential to the determination of lattice dimensions. They already knew how to calculate the optimum dimensions.
A question of ethics is raised by the existence of the German reports. In many cases, useful information is contained therein.
Margaret Gowing rightly trashed the suggestion that Nazi nuclear scientists had no grasp of critical mass. Houtermanns calculated it accurately in November 1941 for Uranium and Plutonium. (Houtermanns, “Zer Frage der Auslosung” (Nov 1941) pp 31,33, Oak Ridge G-94, pp.139)
Other ridiculous assertions that Germany had no Heavy Water after sinking of the Hydro ferry. Harteck revealed after the war that he and Suess were tipped off in advance and arranged to send a dummy shipment on the ferry and evacuate the real heavy water by other means.
In addition to Vemork, Nazi Germany had four Heavy Water plants situated at Leuna, Kiel, Merano (northern Italy) and also at a location 16 km east of Hamburg.
Nazi Germany was never in a position to engineer and build let alone deliver atomic bombs of the era.
Entirely debatable...
What aircraft would they have used to deliver a 4ton plus A bomb with?
Heinkel He-277 with 6 ton bomb payload. At least eight examples flown and sixteen built before production was halted 3 July 1944 for Emergency Fighter Program. Could operate at 49,200 feet well above Allied fighters and far in excess of B-29’s service ceiling. Indeed several He-177 A-6/R1 prototypes were originally designed to carry a massive single SB6000 (6,000kg) bomb. Described as a hollow charge bomb. These A-6/R1 and a single A-6/R2 aircraft were converted early 1944 to He-277 B-5 aircraft.
Even the then mighty B29 struggled with the atomic bombs needing specially converted loading pits.Just to load a single weapon.Germany simply did not have the industrial infrastructure or $ to engineer and build either the B29,$3billion in 1940s cash
equvalent of around $34 billion in todays $
But they did build the He-277 with superior performance to the B-29... strange that. Why would they bother building a bomber so superior to the B-29?
...or the manhattahn project cost of $2billion or $22billion.$60 billion dollars for a weapon and delivery system that the germans doubted would detonate.
Heisenberg & Weisacker doubted it but it was Diebner, Gerlach, Schumann and Trinks behind the German A-bomb project and they did not doubt it at all. I think you confuse Heisenberg’s civilian teams with the Millitary A-bomb projects under Diebner ?
Manhattan Project created two duplicate projects, one for a Uranium bomb by American scientists, and another for a Plutonium bomb with almost exclusively ex-patriate European scientists, so the real project cost should perhaps have only been $1 billion.
I believe you claim germany possesed 10 cyclotrons and that # of centrifuges would have produce enough U235 for several bombs.I would love to see documentation of the fact the had any erffective atomic program including the alleged cyclotrons.
Cyclotrons were not the preferred method for isotope separation. More of a research tool however I simply point out that they were well endowed in this regard.
As to proof of a serious nuclear research project why take my word for it. Let me quote to you an outraged letter from Niels Bohr to Heisenberg after the war protesting the book "Brighter than a Thousand Suns" and it's self justifying commentry by Heisenberg:
Dear Heisenberg,
I have seen a book, “Staerkere end tusind sole” [“Brighter than a thousand suns”] by Robert Jungk, recently published in Danish and I think that I owe it to you to tell you that I am greatly amazed to see how much your memory has deceived you in your letter to the author of the book, excerpts of which are published in the Danish edition.
Personally, I remember every word of our conversations which took place on a background of extreme sorrow and tension for us here in Denmark. In particular, it made a strong impression both on Margarithe and me and on everyone at the institute that the two of you spoke to, that you and Weisacker expressed your definite conviction that Germany would win and that it was therefore quite foolish for us to maintain the hope of a different outcome for the war and to be reticent as regards all German offers of co-operation. I also remember quite clearly our conversation in my room at the institute, where in vague terms you spoke in a manner that could only give me the firm impression that, under your leadership everything was being done in Germany to develop atomic weapons and that you said that there was no need to talk about details since you were completely familiar with them and had spent the past two years more or less exclusively on such preparations. I listened to this without speaking since a great matter for mankind was at issue in which despite our personal friendship, we had to be regarded as representatives of two sides engaged in mortal combat. That my silence and gravity, as you write in the letter, could be taken as an expression of shock at your reports that it was possible to make an atomic bomb is quite a peculiar misunderstanding, which must be due to the great tension in your own mind. From the day three years earlier when I realised that slow neutrons could only cause fission in Uranium 235 and not Uranium 238, it was of course obvious to me that a bomb with certain effect could be produced by separating the uraniums. In June 1939 I had even given a public lecture in Birmingham about uranium fission, where I talked about the effects of such a bomb, but of course added that the technical preparations would be so large that one did not know how soon they could be overcome. If anything in my behaviour could be interpreted as shock , it did not derive from such reports, but rather from the news, as I had to understand it that Germany was participating vigourously in a race to be the first with atomic weapons.
Would you like sources from ALSOS papers in NARA archives, or from other sources?
- Report on Uranium centrifuge plants at Kandern & Freiburg (Oak Ridge file box G-330)
- Dr Wilhelm Groth’s diary and reports (found in Oak Ridge file box G-146, 149, & 158)
- Beams Report of Jessie W. Beams, dated 9 April 1946 NARA file box G-344.
Incidentally the Anschultz Mark IIIA Centrifuge produced 7.4 grams of Uranium enriched by 5% per day. These were installed in a plant at Celle.
The Hellage Mark IIIB Centrifuge produced 200 grams of Uranium enriched by 7% per day, per machine with ten machines built.
...As I said the germans possesed NO serious atomic prograjm. they did not even build an atomic pile for [R&D] until the war was nearly over,3years after the US.
When you make such a statement you betray the lack of depth of your own knowledge about German Nuclear projects in WW2.
Both Japanese (S.Shimizu) and the Germans (Ardenne Laboratory) from 1941 were experimenting with photo-fusion of Lithium 6 with Thorium 232 to breed Uranium 233. This photo fusion also allowed breeding of Plutonium without nuclear reactors.
...In actual fact kiddo US had a crash program from the 40s forward with over 30 sites devoted to development of the atom bomb.
That’s okay kiddo. When you’ve taken the time to read real WW2 archives come back and we can have a real discussion.
The facilities ranged from a huge factorys full of these centrifuges needed to extract U235 from U238 an almost identical isotope OT
U 238...
The fact is both Japan and Germany during WW2 developed centrifuge technology which defeated Manhattan Project engineers. German Centrifuges were 30 times more efficient than the gaseous diffusion method used by USA, so perhaps for every $2 Billion which USA spent Germany maybe spent about $66.6 million to get the same result.
... the majority isotope in uranium consists of 99.3 % of the toatl mass.U235 the radioactive iosotope used in the first type of US atomic weapon the cannon design which fired a slug of isotope @HV into another piece of U235 creating a critical mass and killing 100,000. With approximately 7kilos of u235.
No you have your facts wrong. Tall Boy the Uranium bomb dropped on Hiroshima had 60kg of Uranium 235 at 80% enrichment. Only 700 grams of which underwent fission.
The loater Fatman dropped over Nagasaki require a mere 6.2 kilograms of plutonium and was a more powerful weapon but cloudy day poor aim a mere 40,000 were killed.I dont know how one would quantify the suffereing of the crispy critter survivors.
Critical mass for Plutonium is about 9-11kg, but with a tamper of Uranium 238 drops to 4.4kg. Nagasaki suffered less casualties because hills shielded many inhabitants from direct blast effects.
In response to the other comments you made, Japan enslaved millions of Chinese and Koreans to work in their industrial complexes at Hungnam and Shenyang etc. Japan acquired a lot of German technology but were in fact quite advanced in their own nuclear science.
Finally whomever suggested US/Brit airpower had limited effect on germany or Japan needs to read a book or speak with an inhabitant of Berlin, or Tokyo veteran of firebombing campaigns that killed more than the atomic weapons.
I don’t believe I ever suggested Allied Bombing had limited effect therefore assume your comment was directed at someone else? Allied airpower of course hugely sabotaged the German war effort.