Lucky me I've just read an article about the company "Linke Hofmann" that built this plane.
The company nowadays btw. still lives on under the roof of the french company "Alstom", they're nowadays "Alstom Transport Deutschland GmbH", formerly named "Linke-Hofmann-Busch GmbH (LHB)" and they're manufacturing rail vehicles.
The plane in question is a
Linke-Hofmann R.II, "probably the largest single propeller driven aircraft that will ever be built" propelled by "the largest single propeller ever used to propel any aircraft in aviation history" with 22 ft 7.5 in diameter.
The plane is essentially based on "Albatros" biplane fighters, enlarged by a 3:1 scale factor.
It didn't make it to WWI, only two planes have been built (R.55/17 and R.58/17).
Best regards - Mike