He111B-2 - bomber with DB-600CG engines, maximum takeoff weight of 10000kg and bomb load of 1500kg.
In December 1936, it was decided to form an experimental bomber squadron for the war in Spain, the main task of which was to test three new German bombers in combat conditions. It consisted of four Do 17Es, four He 111Bs and four Ju 86Ds. The bombers arrived in Spain in mid-February. Soon, He 111B showed a clear advantage over Dornier and Junkers. They were faster, more maneuverable, carried a heavy bomb load and had better handling.
May 4, 1937, the first Not 111 B-2 was rolled out of the final assembly shop. Subsequently, in Marienekh, the He 111V-1 gave way in production to an improved type - He 111 V-2. The heavily protruding radiator hoods on the previous model were a source of great resistance.
After the introduction of the fully supercharged DB 600CG engine, which produced 950 hp. on takeoff and 910 hp. at an altitude of 4000 m, a new cooling system was created for it. The radiator now stood in an aerodynamically refined canted tunnel and was complemented by surface radiators under the leading edge of the center section.