Soviet Polikarpov I-153 biplane fighter aircraft from the Red Army Air Force with DM-2 ramjet engine was tested in September 1940. The growth rate in comparison with a conventional piston engine was 30 km/h.
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Soviet Polikarpov I-153 biplane fighter aircraft from the Red Army Air Force with DM-2 ramjet engine was tested in September 1940. The growth rate in comparison with a conventional piston engine was 30 km/h.