Fluwag (Flugwissenschaftliche Arbeitsgemeineschaft) Bremen produced ESS 641 low-wing single-seat glider tug with 180-hp Lycoming (17 September 1971).
Fluwag (Flugwissenschaftliche Arbeitsgemeineschaft) Bremen produced ESS 641 low-wing single-seat glider tug with 180-hp Lycoming (17 September 1971).