Papin-Rouilly Helicopter.
The disk on the left contains an 80-hp Le Rhone rotary engine turning a ducted fan. The air was pumped out through the tip of the rotary wing to push it around. Some of the air was pumped through that tube to be used for pitch and yaw control.
It was tested in 1915 but mostly just scared the fish.
Here's a modelling
site in French which has more pictures.
You have to give the designers a high score for imagination. And at least no one was hurt.
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