I don't get it slip...the bomb was used on Japan. Original poster is on about Germany in his question?
Unless you are thinking of ultimate victory as Nooble points to as in dropping the bomb on Germany at some undetermined date. In which case without UK which I shall presume as falling without the aid of its allies or at least coming to a seperate peace without any help from anyone in 1940, why should America even come to war with Germany. And would it win any race for the bomb if Germany had British scientific knowledge as a helper and time and space on its side. A what if this is turning into...Seems I do do em even if I don't.
As Britain could carry on under a vichy style administration, RDF, or Radar will still appear..The aircraft to drop the bomb is going to have to fly some distance, which later in the war it would be able, but the Germans and their new allies would not have stood still in the intermediate period.
Edited by urqh, 08 July 2012 - 05:52 AM.