Design H. J. Biedermann, H. Voigt Year of construction 1937 Materials Wood, plywood, steel pipes, fabric Wingspan 8,8 m Wing area 10 m² Basic empty weight 506kg Seats 2 Notable Slotted wings and slotted [...]

Design R. Kosin, R. Schomerus Year of construction 1933/1936 Materials Wood, plywood, fabric Wingspan 12m Wing area 11,4m² Basic empty weight 54 kg (D-28a), 72 kg bzw. 83 kg (D-28b) Seats 1 Notable Extraordinarily [...]

Design G. Horn Year of construction 1930 Materials Wingspan 11,7m Wing area 16,7m² Basic empty weight 400kg Seats 2 (side-by-side) Notable First AkaFlieg aircraft to feature a side-by-side seat configuration [...]

Design F. Fecher Year of construction 1931 Materials Wood, plywood, fabric Wingspan 7,4 Wing area 13m² Basic empty weight 345kg Seats 2 Notable Similar to D-18, 2 of 3 previously planned aircraft were built. [...]