The Mars Odyssey spacecraft uses three spinning reaction wheels to control its orientation in space. But on June 8, one of those reaction wheels jammed temporarily and sent the orbiter into a safe mode to await directions from mission controllers on Earth.
As part of the repair process, mission engineers activated Mars Odyssey’s spare reaction wheel on June 12, spinning it up to a mindboggling 5,000 rotations per minute in both the forward and reverse directions.
Hmmm. I quite often rev Gwendolyn’s little V6 up to 5000 rpm, and neither her mind nor mine ends up boggled. (There’s another 1600 before the redline.) And this is nothing compared to, say, a Dremel tool that starts at 10,000 rpm.