Explore the mysteries of the precession, inertial guidance, gyroscopic compasses and stabilization. This hands-on demo runs up to 3 minutes with little vibration because it's precision machined and balanced. It features a dynamically balanced 6 cm diameter steel rotor with near-frictionless Fluoropolymer (PTFE) bearings. The gimbal cradle with cone bearings pivots to hold the spinning gyroscope in place. Includes: pull string and handle; molded plastic base; molded plastic rocker with attached gimbal cradle; weight set; support hook; instructions with theory and operation tips. Weight: 0.45 kg.