X-Plane 9.70 – Heinkel He-111 Z “Zwilling” 1.0. The He 111Z Zwilling was a design that entailed the merging of two He 111s. The design was originally conceived to tow the Messerschmitt Me 321 glider. Initially, four He 111 H-6s were modified. This resulted in a twin-fuselage, five-engine aircraft. They were tested at Rechlin in 1941, and the pilots rated them highly. Two liveries are included; eastern front (summer) and eastern front (winter, default). Published with Jacque’s permission, sounds by dataroots. By Thibaud Duhamel.