Which is the response collision channel of airsim UAV in UE4？

[Newkami]

I want an actor to only receive collision response events from flyingpawn, so I close other collision channels and use SetCollisionResponseToChannel (ECC_Pawn, ECR_Overlap) to open pawn's response channel. But it didn't work. When the UAV overlaps with this actor, the response event is not triggered.