Small quibble: the ISS gyroscopes are constant-speed; they apply torque to the station by pivoting their axes. The argument stands, though; if there's a constan

Small quibble: the ISS gyroscopes are constant-speed; they apply torque to the station by pivoting their axes. The argument stands, though; if there's a constant need for torque then eventually the gyroscopes will end up all pointing in the same direction (a "singularity") and unable to apply further torque; thrusters will then be needed to balance the gyroscopes being returned to effective orientations. Ref: https://en.wikipedia.org/wiki/Control_moment_gyroscope https://en.wikipedia.org/wiki/Control_moment_gyroscope