Himmler had Flettner's wife and family escorted safely to Sweden for the duration of the war.[15] Anton Flettner's partner and confidant was Dr. Kurt Hohenemser, a brilliant and thorough engineer who developed the details necessary for the success of Flettner's helicopters.[15] Dr. Hohenemser's father was also Jewish, yet both remained unharmed during their tenure together throughout the war as they worked to develop the helicopter for military use.[3][15]