[michtzik]

B-29s dropped the atomic bombs. The B-29 project was also more expensive than the Manhattan project: > The $3 billion cost of design and production (equivalent to $52 billion in 2024), far exceeding the $1.9 billion cost of the Manhattan Project, made the B-29 program the most expensive of the war.

https://en.wikipedia.org/wiki/Boeing_B-29_Superfortress

[southernplaces7]

Sure, because the United States wanted a truly powerful long-range bomber that could fly at extreme altitude with a pressurized, climate-controlled cabin such as its liberators and B-17s didn't have. They wanted this for initially bombing Japan, since the B-29 was developed before the US navy had conquered islands close enough for easy access with older bombers to the home islands.

But, none of this as necessary for delivery of the bomb, especially if we're talking about Nazi Germany, which could have (had it developed the bomb) used any one of its Dornier, Heinkel or Messershcmitt bombers to do the same. Given the size and weight of the two American atomic bombs, the Germans probably could have even used their medium bombers like a modified Heinkel 111, had they already developed their own atomic bomb with a size similar to Little Boy.

You're perhaps confusing useful co-developments with need.

Also worth noting, had Germany invested resources well -instead of frittering them away under Hitler's often incoherent leadership penchant for forcing through personal whimsies and irrational strategic desires- it could have redirected the whopping 160 billion in 2024 dollars that it spent on the largely worthless Atlantic Wall into all kinds of powerful projects.

There's a figure that dwarfs both the Manhattan Project and the B-29 combined. The Nazis could have invested in atomic development while still developing their strategically inert but technically marvellous V Weapons with that kind of money, which they spent anyhow on concrete nonsense.

It's sort of ironic too, since Hitler directly benefitted from the Maginot Line being useless, then went ahead and built his own colossal version of the same foolishness against invasion.

Also, the Germans developed a very useful surface-to-air missile during the war. It was called the wasserfall, and genuinely had promise for severely damaging the allied bombing effort, but no, Hitler was fixated on his giant, immediately worthless V rocket, and wasserfall was neglected then cancelled, the technology applied to the much more difficult V2.

[anonymars]

Not to take away from your thesis (I agree that this was likely a very solveable issue, and after all they didn't need to fly across an ocean), but even Little Boy was 9700 lbs, which was nearly 2000 lbs/25% more than the He 111's capacity even with rocket assisted takeoff. So it is indeed easy to overlook that simply having something to deliver the massive things was no small feat

> Up to 3,600 kilograms (7,900 lb) could be carried externally. External bomb racks blocked the internal bomb bay. Carrying bombs externally increased weight and drag and impaired the aircraft's performance significantly. Carrying the maximum load usually required rocket-assisted take-off.

https://en.wikipedia.org/wiki/Heinkel_He_111