Construction of the Do P began in July 1929, and its first flight took place on March 31, 1930. The aircraft was tested in such places as Lipetsk. The Do P was a monoplane constructed mainly of metal, but covered in some places by fabric. The aircraft was powered by four nine-cylinder Siemens Jupiter VI, each with 530 horsepower. The aircraft had a crew of six. It was eventually developed into the Dornier Do 11.