This helicopter was built by I.P.Bratukhin team in 1936.
The prdecessor's TsAGI 5-EA rotor layout was used on this substantially bigger and heavier aircraft.
The engine was housed in the front of the fuselage, coupled with cooling fan and radiator.
Main rotor was same as on the 5-EA, but two control propellers were placed on the wing.
Due to over-complicated control system flew only on the tie.
TsAGI 11-EA specifications:
Engine 1 x 630hp "Conqueror" ,
Length 8.5m ,
Rotor diameter 15.4m/9.2m ,
Height 3.5m ,
Wing Span 10.6m ,
Wing Area 11.3sq.m ,
Flight weight 2600kg ,