ORIGINAL: FatCat
Thanks rc, but it isn't the ski height I am concerned about...it is the prop hitting the snow when the skis are an inch or so under the powder. If I was flying on hard packed snow, then it wouldn't be an issue.
I'm an utter novice, so keep your salt shaker handy, but...
It seems to me that you'd want as much thrust as possible to overcome the ski drag. Would it be possible to keep your 11x6 prop and use a taller landing gear for your skis? I'm not sure how easy it'd be to trade out your landing gear rather than just bolt ski's on where your wheels used to be, but it might be worth the effort to stick some taller landing gear on to make up the difference in ground clearance rather than using a smaller diameter prop...
Sorry I can't answer your real question (which prop to use) but maybe there's an alternate solution to the problem (prop hitting the snow)