Abstract: A stabilization system for space platforms, satellites and the like. One arrangement for demonstration purposes incorporates a frame and a pair of motor/flywheel units which are pivotably mounted to the frame. These units are retained in positions of alignment with the frame axis and energized briefly to develop a torque for rotating the frame. Retraction of a retaining pin permits the units to pivot by 90 degrees, immediately generating precession forces which abruptly stop the frame at the desired angular orientation.

Abstract: A system for controllably positioning printed circuit boards or the like for the automatic drilling of holes therein. A plurality of individual work positions is provided, together with corresponding work carrier plates having individual or groups of circuit boards affixed thereto. Each work position includes a work table, a drilling machine with associated control equipment, a carrier plate for the circuit boards, and means for supporting the carrier plate and circuit boards above the work table with minimal resistance to lateral movement of the carrier plate and boards. The carrier plates are tied to a central drive system controlled by an automatic control unit in a manner which rigidly maintains close tolerances to lateral movement while permitting vertical displacement relative to the work tables. A master table is included for the drilling of a master template and to prevent displacement errors in the holes to be drilled.