Whoever steps into the cross is pushed forward by the wheel until the floor suddenly disappears at the far end of the room (see map). Jumping across the gap requires an ACROBATICS roll with a bane. Anyone who fails plummets down a deep shaft. It takes two rounds for the wheel to make a full rotation.
The correct way to bypass the trap is to stand in the center of the wheel. There is a small ledge from which a person can quickly walk along the edge to the left (east) of the shaft before the wall of the cross-shaped wheel blocks the exit. No roll is required. The ledge only has enough room for one person, which means that only one person at a time can bypass the trap. To reach the ledge in time, the player characters must be standing in the center of the wheel before the shaft opens
To my mind, it works like a seed spreader and would need to spin clockwise for the ledge to be accessible before the shaft. The map image does not show a ledge, but I assume it is just a bit of floor wide enough for one foot to be placed so a player character can walk past the shaft (following arrow in attached image). But how can a player character stand in the center of the wheel if there is a pillar for the paddles to spin around and why would they need to (location of question mark in attached image)? Is it just trying to say that if a player hugs the pillar then they wouldn't make it to the ledge in time?
Thanks for the help.