Assuming the war ends in 1917 by negotiation (no US), what would the aircraft of the postwar world look like?
The Central Powers had their aircraft industries gutted and several new companies sprung up IOTL in the 1920's to replace them. Also CP engine development lagged throughout the war because they were forbidden from developing engines further and having any military aircraft, preventing them from gaining experience with their current designs.
Aircraft manufacturers that existed in some form during WW1 and WW2:
Junkers, Gotha, Albatros (Focke-Wulf), Fokker, BFW (Messerschmidt), Siemens-Schuckert (Bramo-BMW)
Other aircraft companies in WW2 with links to WW1 designing:
Dornier (Zeppelin-Staaken), Heinkel (Albatros)
http://en.wikipedia.org/wiki/List_of_military_aircraft_of_Central_Powers_in_WWI#Aircraft_producers
What would be the result of Germany not having to abandon aircraft production in the late 10's and 20's? Could they have had a strategic bomber fleet by the 1930's?