@ fb, the TB 3's time had come and gone before the outbreak of the war, while it was used alot durring the winter war in its primary roll, bombing, after this, in the mid war years, it became more of a testing platform for a "fighter mothership" then in ww2, its roll was more of a transport then anything else, with the Pe-8 it too saw limited service, most of the problem with that was reliability, if I remember correctly, there was no more than 20 of these opperationaly at a time durring the war.