Ekonomov large rotary-wing aircraft

[hesham]

Hi,

Pavel Ivanovich Ekonomov designed a large rotary-wing aircraft with
two contra-rotating sets of two-blade rotors,thick wing profile,each
with aileron,it was never complated.

 

[lark]

Must be the Zhiroplan design dated 1936 I think..

 

[borovik]

Yes. Paul, you right.

 

[hesham]

Thank you my dears Lark and Borovik.