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In my personal list of contra-rotating propellers aircraft, there are a few aircraft that flew before these two[URL unfurl="true"]https://aviationsmilitaires.net/v3/forum/autres-sujets-militaires-44/topic/premiers-avions-%C3%A0-h%C3%A9lices-contrarotatives-784/[/URL][URL unfurl="true"]https://ww2aircraft.net/forum/threads/aircraft-with-contrarotating-props.17501/[/URL]
In my personal list of contra-rotating propellers aircraft, there are a few aircraft that flew before these two
[URL unfurl="true"]https://aviationsmilitaires.net/v3/forum/autres-sujets-militaires-44/topic/premiers-avions-%C3%A0-h%C3%A9lices-contrarotatives-784/[/URL]
[URL unfurl="true"]https://ww2aircraft.net/forum/threads/aircraft-with-contrarotating-props.17501/[/URL]
