I've never tried tri props either, until I bought the Shuriken 180. It comes with 4040 tri props. It flies very well. I bought some 4040 four blade props and the 180 is just too "floaty" for me, lol.
But...these tri blade RaceKraft props are just BEAST! My friend has a 250 quad with 5051 RaceKraft props and it's just amazing how fast he can get from one side of the field to the other side.
Derek
Foam Board Scratch Build Plane Fanatic
HK Assault 700 (to be built)
Align Trex 600 Pro DFC, Ikon
Align Trex 500e
ZMR 250 FPV Race Quad
HK Skyfun with 5.8ghz FPV
Spektrum DX8