How can I add gravity to a pawn?

Hi, I have a pawn and I want to add gravity, and the ability to jump. I prove to change the z velocity of the floating pawn movement but the results its not good because if the plane is inclinated, the pawn move down without I press any key.

What is the best solution??


I asked a similar question yesterday here: How can I snap my character to a floor with any given rotation? - World Creation - Unreal Engine Forums

Still waiting for some UE guru to give me a hint for the direction I should take. :S
I haven’t found a solution to it either in the meantime. X.x