Heinkel HD 22

The Heinkel HD 22 was a trainer designed in Germany during the 1920s. It was a conventional single-bay biplane with staggered wings braced by N-type interplane struts, a pilot and an instructor sitting in tandem in open cockpits, and a fixed tailskid undercarriage whose main units were linked by a cross-axle. The main producer was Manfred Weiss in Hungary, which built the design to equip the Hungarian Air Force at a time when that service was masquerading as civil flying clubs; around 30 aircraft were purchased, making Hungary the most significant user. One HD 22 was also bought by the US Army Air Corps for the US military attache in Germany. Its BMW IV six-cylinder engine produced 170 kilowatts and gave a top speed of 204 kilometres per hour.