@TaIverd From what I can gather, the boomerang system is a free flyer that would float away from Freedom to allow for a lower microgravity environment for some experiments.
Page 80 https://t.co/qMZiSgXEKL
This document had only 4 downloads when I found it yesterday https://t.co/lA5BqFsQwm
Here's a 1985 concept of what the Japanese Experiment Module aboard Freedom could have been
https://t.co/qMZiSgXEKL https://t.co/se481CI2EH