Having tested back to back RV10's with 2 blade and three blade we found a 6-9 knot slower cruise with the 3 blade.
Another anomaly we found is higher CHT in the order of 40dF which we could not solve nor explain. May have been nothing to do with the prop, but the other two -10's were consistent with each other.
DYNON Authorised Dealer and Installer
The two best investments you can make, by any financial test, an EMS and APS!