I've never run single blade but I asked some speed flyers about it and the consensus opinion was that they increase vibration.
I have run "single blade" by accident with a hand carved maple prop on a TD .049 and thought I saw a performance increase. One of the prop blades blew off at half span in flight and the engine definitely gained RPM.
It wouldn't hurt to try a single blade prop if I can get reassurance that the radio gear can tolerate it. I've done 130 MPH with a $30 ASP .12 that was turning a APC 5 X 5 electric prop so I would expect to see a Russian combat engine deliver quite a bit more than that. I'd call anything less than 150 MPH a failure.