Back Douheret helicopter
1919

Douheret helicopter

The Douheret helicopter of 1919 was the first helicopter with the engine placed between its two coaxial rotors.

Thanks to Joel Lowers from Belgium for the photos and information

Douheret helicopter

Comments 
Dan, e-mail, 28.12.2014

If you Google "Rotative Engine YouTube" you will see the clip of a Russain company's latest efforts in their engine design to revive this idea for helicopters.

Dan, e-mail, 27.12.2014

Glad I found out about this guy. Bruno Nagler gave this idea a try I read in his 1950's Model 120 and 160 designs. Google patents 2948491 and 3206145 for what he came up with. I am looking into it for a one man kit copter idea I have. Lower part count then even a tip jet design!

shoes, e-mail, 13.06.2011

with the engine placed between its two coaxial rotors.

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