[PAR] [TLE] Heinkel HD 23 [SEP] The Heinkel HD 23 was a carrier-borne fighter biplane designed in Germany at Heinkel Flugzeugwerke in the 1920s, for export to Japan.  Two examples were delivered to Aichi as pattern aircraft in 1927.  Aichi added rudimentary flotation capability and built two further examples as the Type H Carrier Fighter, but full-scale production was not started. [PAR] [TLE] Aircraft carrier [SEP] An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and facilities for carrying, arming, deploying, and recovering aircraft.  Typically, it is the capital ship of a fleet, as it allows a naval force to project air power worldwide without depending on local bases for staging aircraft operations.  Aircraft carriers are expensive to build and are critical assets.  Carriers have evolved since their inception in the early twentieth century from wooden vessels used to deploy balloons to nuclear-powered warships that carry numerous fighter planes, strike aircraft, helicopters, and other types of aircraft.  While it is possible to launch heavier aircraft such as fixed-wing gunships and bombers (it has been done) from aircraft carriers, it is virtually impossible to land them.
[PAR] [TLE] Heinkel HD 23 [ SEP ] The Heinkel HD 23 was a carrier - borne fighter biplane designed in Germany at Heinkel Flugzeugwerke in the 1920s , for export to Japan . Two examples were delivered to Aichi as pattern aircraft in 1927 . Aichi added rudimentary flotation capability and built two further examples as the Type H Carrier Fighter , but full - scale production was not started . [PAR] [TLE] Aircraft carrier [ SEP ] An aircraft carrier is a warship that serves as a seagoing airbase , equipped with a full - length flight deck and facilities for carrying , arming , deploying , and recovering aircraft . Typically , it is the capital ship of a fleet , as it allows a naval force to project air power worldwide without depending on local bases for staging aircraft operations . Aircraft carriers are expensive to build and are critical assets . Carriers have evolved since their inception in the early twentieth century from wooden vessels used to deploy balloons to nuclear - powered warships that carry numerous fighter planes , strike aircraft , helicopters , and other types of aircraft . While it is possible to launch heavier aircraft such as fixed - wing gunships and bombers ( it has been done ) from aircraft carriers , it is virtually impossible to land them .
Heinkel HD 23 was a type of plane that was held on the craft that were first developed when?
Heinkel HD 23 was a type of plane that was held on the craft that were first developed when ?
early twentieth century
early twentieth century