I should point out as I was the last RC wars event that the spinners running ar rc wars were Tantrum and BS both horizontal.
The arena is also indoors, the question should not be did it have a roof (I honestly didnt notice (3 hrs sleep)) but was there a significant gap between the walls and the roof.

Previously I would have questioned the size and speed anything would be launched in the air by a feather spinner but after vortex launched our tail at inspire I dont see how I can.