John, I have a 7-70 on a 91 inch corsair but it weighs a ridiculous 20.5 pounds. The performance is excellent even with a less than optimal prop. So I asked about the performance of a corsair that is slightly smaller yet weighs over 30 pounds. People really like the combo so the performance should be good with your P47. The concern is the amount of power. I am saying my concern might be unfounded due to other peoples satisfaction. A red flag in my head does not mean I am right! The real corsair and p47 had the same engine with similar performances at level flight at the same manifold pressure. Christiantofastforyou, could you comment on your planes performance? -Tom