mehaaniline seade, mille abil saab impulsimomenti arvestades mõõta või säilitada ruumilist orientatsiooni, device used for measuring or maintaining orientation and angular velocity, wheel or disk mounted to spin rapidly about an axis and also free to rotate about one or both of two axes perpendicular to each other and to the axis of spin so that a rotation of one of the two mutually perpendicular axes results from application of torque to the other when the wheel is spinning and so that the entire apparatus offers considerable opposition depending on the angular momentum to any torque that would change the direction of the axis of spin, kiiresti pöörlev jäik keha, mille pöörlemistelje siht ruumis võib aja jooksul muutuda, device for measuring and maintaining orientation in space, mõõtevahend orientatsiooni mõõtmiseks ja säilitamiseks ruumis