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If we are into fantasy the Canberra would be more feasible and have almost as big an impact
The processes involved in manufacturing the turbine and compressor blades was not really available in the US in 1942, or anywhere. These processes were in the very early stages of development in 1942.
I wonder if something like an A6 would be more useful and less difficult for the times?
Obviously the range is the problem compared with the B-52. And the engine issue is the same (when the XP-59 first flew its engines gave 2 x 1,300lbf thrust, the A6 needs 2 x 9,000lbf and the B-52 8 x 10,000lbf).
But if you still have bases in the UK, the A6 would give the Germans a lot of strife.
The V-2 engines did not use much in the way of high temp materials. The Germans did not have access to those ores. Rather than using a gas generator to drive the turbopump turbine they used H202, which is a much colder reaction and meant the V-2 engine did not need as much in the way of nickle. That same problem killed their jet fighter program.
And there is nothing needed to build the B-52 in 1952 that was not available in 1942. If you suppose that the later knowledge as to alloys and designs are supplied, you are there. The big question is: would you even build a B-52 or something better?
The transistor was accidentally discovered in 1921 and invented in 1946. A four year advancement - and then some - in that technology would be trivial to implement. And computers do not have to be the size of a paperback book to work.
My knowledge on this subject is limited. Would you be able to explain further?
Nah, the B-36 was the epitome of a humungous 'white elephant' - that only the US could afford..
( even then, it was a 'close run thing' - against the USN's new 'big carrier' demands,
& only saved by 'the bomb' )
..it was obsolescent by the time it got into service ( & oh yeah - it was a horror, to service)..
Chuck Yeager enjoyed putting the hopes of the USAF 'bomber mob' straight,
on the gun-aiming problems of the MiG 15 he evaluated.. along the lines of..
'Sure its lousy, but its big cannon can 'cover the spread' - offered the by the bloated B-36's planform!'