A.Kay Junkers Aircraft and Engines 1913-1945 (Putnam)

Junkers J12

  The last design tackled by Junkers before the end of the First World War was the J12 passenger aircraft, reflecting Professor Junkers’ great interest in civil rather than military aircraft. Originally it was hoped to capitalise on the J10 design as a passenger transport, and one example was modified with a hood over the rear passenger seat. March 1919 saw this machine in service with Junkers Luftverkehr, though merely as an interim measure.
  Therefore, using the J10 as a basis, Reuter set about designing a four-seat airliner in December 1919. This corrugated Duralumin monoplane was designated J12. The main modification from the J10 was the redesign of the fuselage to give a totally enclosed cabin for the three passengers. However, this cabin was subsequently deemed insufficiently spacious, and so the J12 project was abandoned in favour of the later famous F13.


Data: Span 12.2m (40ft 2]4in); length 8.25m (27ft Ohm); wing area 25.0m2 (269 sq ft); max. speed 170kph (105mph).