I create a vehicle, but it hang in the air all the time,and never fall to the ground

[zjj]

I create a vehicle pawn like this:Vehicle User Guide | Unreal Engine Documentation

and create a new level , then set it as the default pawn, but when I start the game, the vehicle hang in the air all the time ,and never fall to the ground; when the forward-event firing, the vehicle never go ahead, it stay at the old position? how should i do to solve this problem?

[Nico_Steyl]

Did you remember to enable “Simulate Physics” on the car mesh? Open the car BP, select the mesh, in the details panel, search for “Simulate Physics”. It should be enabled