# How does JAXA's “Int-Ball” manage airflow to optimally navigate inside the ISS?

above: From the BBC's Japan's zero-gravity space drone sends first pictures from ISS.

This is JAXA's GEM internal ball camera, or "Int-Ball". Kawaii! It looks like it uses a three axis attitude control system developed for a ~31mm small cube satellite (see screen shots below), but for maneuvering around in space there are twelve electric micro-fans or $\mu$Fans.

Is there any information about how the airflow of these fans is managed? Do they work in adjacent pairs to avoid torque, or are they all pointing back toward the center of mass? Do the fans on the opposite side of the blowing fans actively suck in air, and transfer it via internal manifolds to the blowing fans?

Start watching the video at 01:00 to see attitude control and simultaneous live camera view.

below: Screen shot from this helpful JAXA video at 00:40. The glowing lines are data/power lines from the control electronics, which sits above the cube with gyros. They to not represent airflow.

below: Screen shot from this helpful JAXA video at 00:42. The