What prop for a .91 OS 2S?
I'm about to build the new ARF GP 70" Revolver (looks beautiful...) and will be overpowering it with an OS 91 2s (instead of the 61 they recommend - I tend to overpower...), and I'm looking for prop recommendations. I'm seeing different "official" recommendations depending on where I look (Tower Hobbies is saying a 13x8, but the online OS docs say between a 13x8 and a 16x6 or so). I'm looking to fly sport - not 3D just yet - but would like to ring as much speed out of this setup as possible. My friend runs a 13x7 on his 55 OS 2S on his 59" Revolver and that thing moves! Tower says to use a 13x7 on the 91, but that seems too small to me. I just ordered some 14x7's, but I'm just guessing. Any recommendations?