The Mil Mi-32 was a project for a super-heavy crane helicopter from 1982.A project of the heavy flying crane helicopter with a take-off weight of 140 tons intended for transporting civil and military technics. But never built.
source/image(PrtSc): Found And Explained
As an absolute special feature, it had three main rotor systems based on the Mil Mi-26. These three systems were connected to a hull that connected the systems in a triangle.
Calculated takeoff mass of the Mi-32, depending on the assumed application of a helicopter, were about 136-146 tons, the static ceiling – 1000-1500 m, service ceiling 4000 m, speeds- 200-230 km/h, ranges from 300 to 1200 km.
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The center between the three main rotors remained free. The take-off weight of the device intended for material transport in Siberia should be 142 tons, the maximum speed 230 km/h and the range 600 km. However, due to the dissolution of the USSR, it was not carried out.via/read more: Found And Explained