How to know if a pawn is falling (without using UCharacterMovementComponent)

Seriously i really need help with that.
I’m making a game about racing spheres highly focused on the game physics so i need to find a way to the game see when the player pawn is in the air so he can’t jump in the middle air, but looks like i don’t have any idea of how can i do this in Unreal 4.

The easiest way would be a simple Line Trace straight down from the spheres center, slightly longer than the radius of your sphere, if it hits, the sphere is on the ground. Do this in the Tick event and set a boolean which is used in the Jump event to determine if the sphere can jump or not.

Thanks, this actually worked pretty well here