I just ordered a norvel .074 It's the power of a .10 at less than half the weight .Norvel engines have the best power to weight ratio from all the research I have done including rc universe.The .061 ap wasp was my first choise because of the abc construction,until I learned the norvel .061 was very slightly lighter and had slightly higher rpm due to the all aluminum construction.Bolth are fine engines, but I choose the .074 I am designing a low wing floater around it.
