The Heinkel HD 21 was a trainer built in Germany during the 1920s. It was a conventional single-bay biplane with staggered wings braced with N-type interplane...

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The Heinkel HD 17 was a military reconnaissance aircraft produced in Germany in the late 1920s. The Heinkel HD 17 was a conventional single-bay biplane...

The Heinkel HD 26 was a reconnaissance seaplane developed in Germany during the 1920s for production in Japan. It was intended as a smaller, single-seat...

The Heinkel HD 19 W (or Svenska Aero J 4) was a biplane seaplane fighter developed by Ernst Heinkel Flugzeugwerke . The Heinkel HD 19 W was the only naval...

The Heinkel HD 16 was a single-engine biplane torpedo aircraft developed by the German aviation company Ernst Heinkel Flugzeugwerke in the nineteen-twenties...

The Heinkel HD 25 was a two-seat shipboard biplane reconnaissance floatplane developed in Germany during the 1920s for production in Japan. It was intended...

The Heinkel HD 14 was a single-engine biplane torpedo aircraft developed by the German aviation company Ernst Heinkel Flugzeugwerke in the 1920s, and...

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...

The Heinkel HD 37 was a fighter aircraft, designed in Germany in the late 1920s, but produced in the USSR for Soviet Air Force service. It was a compact...