Heinkel HD 37

Imagine: Wikimedia Commons

An advanced fighter design of 1928, the HD 37 achieved exceptional performance for a single-engine aircraft of its era. At just 7 metres long, it reached 290 km/h and boasted 700 kilometres of operational range—enabling rapid interception and tactical deployment. The compact design and single crew emphasised speed and manoeuvrability for fighter-versus-fighter combat.