However I think this was simply to maximise range from the blast rather than any particular advantage of presenting the rear of the aircraft. After all, continuing straight would also mean the detonation was directly behind, but obviously at a much shorter distance.
I'm not sure I understand....
Flying at a constant speed at the point of delivery, surely it is far easier to simply continue to fly in the same direction as that does not waste any time in turning around? Did they turn round so that they were on the 'right' side of the explosion so they could find a safe place to land?