For stability and good speed the X440/3 , thats the best coursing prop on standard set-up i reackon.
for better speed X642,M445
then get into modding them
I use a Grimracer 42x55, that works better for me than either the X642 or the 440/3. Everything on my SV is stock except for buffing the hull, and I use 4s lipos. At our last race Kevin lent me a 42x55 that had been shaped and cupped by Mike D. of Auquacraft. We gps'd the boat at 42.7 mph!!! Too bad I can't use that prop in spec SV27 competition!!!
member P.S.F.E.M.B.C. Sunny skies and smooooooth water...............
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