The Soviet-built I-7, which was a licence-built version of the Heinkel HD 37c

The original German-built version of Heinkel HD 37c

The Heinkel HD 43 was developed to meet a Reichswehrministerium requirement, but was not produced in quantity.

The Heinkel HD 43 was developed to meet a Reichswehrministerium requirement, but was not produced in quantity.

The original German-built version of Heinkel HD 37c

The HD 38b land-based fighter

С такого ракурса самолет HD-23 не очень похож на истребитель.

Heinkel's first single-seat fighter was the HD 23, it was known in Japan as the Aichi Type H.

The sole Heinkel HD 26, which was developed for use in Japan as a shipboard fighter-reconnaissance aircraft.