I don't recall seeing one... I'll look it up anyways. I took a better look at FS1 and 2 bombers and my oppinion is that in the first war the GTVA needed much heavier bombers to combat the superior Shivan ships and armor in a time where the GTVA didn't have the big guns to deal with the Shivans. However in FS2, now that they use beam cannons, the bomber has somewhat lost its value and smaller more maneuverable bombers have gained greater favor. That speed would be vital in order to get in and out before getting vaped by beams and such.
Well thats all I have to say.