Type of flywheel used for three axis attitude control in spacecraft.
1First, the spacecraft team put Cassini's three reaction wheels to work.
2It has lost two of the four reaction wheels it uses for fine-pointing.
3Using the reaction wheels again, they'll make two careful turns over the course of about 45 minutes.
4In May 2013, the second of four reaction wheels - used to control a spacecraft's orientation - failed on Kepler.
Translations for reaction wheel