You may want to throw it on the kitchen scale. I'm guessing $5 Walmart foam board is a little heavier than standard Dollar Tree Foam Board. Make sure the center of gravity (CG) is spot on. The heavier the foam board, the further back the CG typically is. If you add paint, it goes further back as well.
Let's see how much it weighs before it flies!
Nose heavy planes fly poorly, tail heavy planes fly only once. Or something like that...
Let's see how much it weighs before it flies!
Nose heavy planes fly poorly, tail heavy planes fly only once. Or something like that...