1. The problem statement, all variables and given/known data Snoopy is flying his vintage war plane, chasing the Red Baron. His instruments indicate that he is at the bottom of the loop and is traveling 180km/h (50m/s). He is, of course, sitting on a bathroom scale that reads 4 times his normal weight. What is the radius of the loop? 2. Relevant equations Fc = mv^2 / r 3. The attempt at a solution What force would lead to the centripetal force? I know that Fg is acting away from the center. What does his weight being 4 times larger affect?