RE: IMAC Prop Selection????
Tom,
Sorry, I cannot give you any input on the Biela. I know a few that use them and love them but no one on a DA170. I suspect that since they are a wider/thicker blade you might be better off with something 3-Blade in the 28 inch range. That would keep the RPM's up and allow for a better upline and still have the downline braking