As far as a flyable prop, I'm not sure who makes them, but a friend had a scale 4 bladed prop on a P-51. It would fly too. I asked him what would happen with the P-51 did its inevitable nose over in the grass, and he promptly bent the prop a very tight 180 degrees. It was VERY difficult to flex, but it would if you ever hit it hard. It was one of the all fiberglass P-51's that they race with a Zenoah G-62 and gear reduction.