Darkness has little effect on radar directed flak.
Only a proportion of Germanflak batteries were radar directeed, so darkness does affect flak effectiveness.
Moreover in 1943 German radar was severely affected by Chaff, first deplyed enmasse over Hamburg in July. RAF BC was reaching the zenith of its power in 1943 and to argue it was inneffective or thwarted by German night defences in 1943 is simply to ignore the effects and achievement of BC in 1943. In fact the Germans were forced to significantly beef up their night defences as a result of raids like Gomorrah.
The attack during the last week of July, 1943, Operation Gomorrah, created one of the greatest firestorms raised by the RAF and USAAF in World War II, killing 42,600 civilians and wounding 37,000 in Hamburg and practically destroying the entire city. It was easily the most devastating bombing raid in history, prior to the dropping of the atomic bombs and prior to the US firebombing raids on Japan in 1945. Residential coal cellar coal and coke supplies in Hamburg contributed considerably to the apartment building fires. The unusually warm weather and good conditions meant that the bombing was highly concentrated around the intended targets and also created a vortex and whirling updraft of super-heated air which created a 500m tornado of flame and ash, a totally unexpected effect. Various other previously used techniques and devices were instrumental as well, such as area bombing, Pathfinders, and H2S radar, which came together to work particularly effectively, such that the bombing accuracy of the night bombers in these raids actually exceed the accuracy of the USAAC day bombing efforts over Schweinfurt.
'Window', was successfully used for the first time by the RAF - clouds of shredded tinfoil dropped by Pathfinders as well as the initial bomber stream - in order to completely cloud German radar. The raids inflicted severe damage to German armaments production in Hamburg.
By attacking at night you will be intercepted by German night fighter aircraft rather then day fighter aircraft. Not sure that would be an advantage as German night fighters were pretty good by mid 1943
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No, you wont, as the experiences over Hamburg amply demonstrate.
Attacking at night means navigating and bombing in the dark. Schweinfurt is out of RAF radio navigation range so bombing accuracy will almost certainly be worse. There is a significant chance they won't even find Schweinfurt
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Nope, wrong again. What you are referring to here is the use of OBOE, but this was not possible over Hamburg either. H2S and the pathfinders would have had little trouble in finding Schweinfurt, unlike the terrible conditions BC found over Berlin. There is no reason to not assert that a raid of Gommorrah proportions over Schweinfurt would not have obliterated the city in the same way as hamburg was....