You guys are over my head for the most part. But i'll open myself up for ridicule and mockery. My issue with trying to do scale speed is as follows. A 25% scale model and a 50% scale model fly at pretty much the same speed. If they both have the same wing loading both will pretty much have the same stall speed also. Yes there are other variables but I think we can all concede the actual airspeed of the 50% model is not double that of the 25% model.
david