It's on, Baby Cakes...
Lancaster The Second World War's Greatest Bomber, Leo McKinstry (John Murray, 2009) P. 495:
"Though the B-29 programme was beset with early difficulties, the USAAF was still reluctant to allow America's historic new weapon to be carried by an RAF aircraft. When, in late 1943, plans were being drawn up for the first full-drop tests of a dummy atomic bomb in early 1944, Ramsey again suggested that the Lancaster should be used because production on the B-29 had only just started. But again he was overruled, partly because General 'Hap' Arnold, the head of the USAAF had invested so much energy in the B-29 programme. On 29 November 1943, the first modifications began on the Superfortress to adapt it for the new bomb. The question of using the Lancaster never rose again."
In his footnotes McKinstry references The Making Of The Atomic Bomb by Richard Rhodes (Penguin, 1986), of which I have a copy handy and on page 479, Rhodes writes the following:
"Norman Ramsey started planning full-scale drop tests that autumn as the aspens brightened to yellow at Los Alamos. He offered to practice with a Lancaster. The Air Force insisted he practice with a B-29 even though the new polished-aluminium intercontinental bombers were just beginning production and were still scarce. "In order that the aircraft modifications could begin," Ramsey writes in his third-person report on this work, "Parsons and Ramsey selected two external shapes and weights as representative of the current plans at Site Y... For security reasons, these were called by the Air Force representatives the 'Thin Man' and the 'Fat Man', respectively; the Air Force officers tried to make their phone conversations sound as though they were modifying a plane to carry Roosevelt (the Thin Man) and Churchill (the Fat Man)... Modification of the first B-29 officially began November 29, 1943"."
Rhodes quotes Ramsey's report directly, and this is where I got my information from, too, since I have a written annotation of that report.
The FATMAN bomb was considered for use in the Lancaster in case the B-29 was incapable of carrying it. Numerous sources support this.
Now, Hunny Bunny, what I suspect you are doing is mistaking the fact that testing atom bomb shapes was about to take part using specially modified B-29s, which they did - the 58th example off the production line was retrofitted to be able to carry Thin Man and it was for this test that Ramsey suggested using the Lancaster. Both weapons were to be carried in the same aircraft; the Thin Man in the rear compartment carrying through to under the spar, and the Fat Man shape in the forward compartment. Both bombs were being developed simultaneously and Ramsey and Parsons were tasked with beginning full scale trials at the same time. And again, this was for dropping trials only, NOT operationally
and certainly NOT to carry an operational bomb, just scale shapes that were weighted to look and feel like the bombs. I know wikipedia says it did, but again, you need to quote
directly from the source material as to what is being said.
I put this down to you not reading your source material thoroughly again, Sweetcheex. Let's also not forget that the Lancaster could carry the Thin Man internally, but it could not carry the Fat Man internally. Wanna know how I know this? Fat Man had a diameter of 1.5 metres, the Grand Slam bomb, which could not be carried internally in a Lancaster without the removal of its bomb bay doors, had a diameter of 1.1 metres. So, do the maths.
Your logic is being shot down, prettyeyes...
The B-29 had to be rebuilt to accept the Fatman bomb
No it didn't. The Fat Man could fit within the B-29's bomb bay without modification to the length of it.