Albatros C.IX
The Albatros C.IX was a two-seated German military reconnaissance biplane from 1917. It was built by Albatros Flugzeugwerke. It did not have a central strut between the upper wing and the fuselage, which was uncommon during the time. Also unusual was that the top wing was swept, while the lower wing was straight. Only three of these aircraft were built. Manfred von Richthofen used one for personal transport, including going to meet Kaiser Wilhelm II in May 1917. Specifications Notes References

*(German) Kroschel/Stützer. ''Die deutschen Militärflugzeuge 1910-1918''. 1977. . {{Idflieg C-class designations Albatros aircraft, C.09 1910s German military reconnaissance aircraft Single-engined tractor aircraft Aircraft first flown in 1917 ...
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Reconnaissance Aircraft
A reconnaissance aircraft (colloquially, a spy plane) is a military aircraft designed or adapted to perform aerial reconnaissance with roles including collection of imagery intelligence (including using photography), signals intelligence, as well as measurement and signature intelligence. Modern technology has also enabled some aircraft and UAVs to carry out real-time surveillance in addition to general intelligence gathering. Before the development of devices such as radar, military forces relied on reconnaissance aircraft for visual observation and scouting of enemy movement. An example is the PBY Catalina maritime patrol flying boat used by the Allies in World War II: a flight of U.S. Navy Catalinas spotted part of the Japanese fleet approaching Midway Island, beginning the Battle of Midway. History Prior to the 20th century machines for powered and controllable flight were not available to military forces, but some attempts were made to use lighter than air craft ...
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