"Emile Berliner Invented an Early Rotary Engine and a Working Helicopter — History Forgot Him"

He built the record player. Almost nobody remembers he also built the first rotary aircraft engine in American history — and a working helicopter that flew for the U.S. Army years before Igor Sikorsky's name became synonymous with vertical flight. In 1908, Emile Berliner — already one of the richest and most famous inventors in America — commissioned a rotary engine light enough to lift a machine straight off the ground. By 1922, his son Henry flew a piloted "helicoplane" in front of U.S. Army officials. The design that came out of it would later power WWI fighter planes. And yet history kept only one invention with his name on it. This is the story of how a man built two of the most important machines of the 20th century — and how the public relations machine behind his own gramophone empire quietly buried the other one. 🎧 If you're into forgotten inventors, buried patents, and the engineers history left behind — subscribe, because this channel exists for exactly this kind of story. Timestamps, sources, and further reading in the pinned comment. #EmileBerliner #Helicopter #AviationHistory #ForgottenInventors #RotaryEngine #HistoryYouDidntKnow #Gramophone #Sikorsky