The longer the wing the better.Two years ago, 52" would have been considered long. Today 64" is considered short, and 72" is very common. Think of the wing as the guns. With 52" you have the equivalent of a .30 cal. With a 72" or greater, you change that .30 cal to a guided rocket. Use a big enough fuel tank for 6 minutes of WOT. 4 oz might do it for some, and 6 will for others. Some may even have to go to 8 oz.