While flying the B-34 you can expect manoeuvrability and speed like few other bombers. With any luck he will fall out of the sky in no time. Do slight maneuvers constantly to throw off his shots while trying to put as many shells into his engine/pilot as possible. Start with base/pillbox bombing, and should an enemy fighter come to engage, give him hell with your turrets. While its maximum payload and the ability to carry a torpedo is nice, it's not necessarily as good as its ability to take and give out damage to other aircraft.
The B-34 is a typical American bomber in the sense that its decent payload is outdone by its defensive armament. It was introduced in Update 1.65 'Way of the Samurai'. With a battle rating of 2.7 (AB/SB) and 3.0 (RB).