Balancing Vanguard satellites
National Aeronautics and Space Administration, 1961 - Science - 25 pages
The Vanguard satellites and component parts were balanced within the specified limits by using a Gisholt Type-S balancer in combination with a portable International Research and Development vibration analyzer and filter, with low-frequency pickups. Equipment and procedures used for balancing are described; and the determination of residual imbalance is accomplished by two methods: calculation, and graphical interpretation. Between-the-bearings balancing is recommended for future balancing of payloads.
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Appendix A Tabulation of Vanguard Satellites and Degree
Survey of Balancing Equipment
180 degrees 40-Second Timer American Trebel amplitude readings Appendix arbor AXIS Figure Bl balance the satellites balancing equipment Balancing Procedure BALANCING VANGUARD SATELLITES Baumann Goddard Space Between-the-bearings balancing Calibration curves cantilevered center of gravity center-of-gravity displace checkweight Cloud Cover FU counterweight Determine residual imbalance dynamic imbalance dynamic residual imbalance equations equatorial plane filter g-weight gm-in grams imaginary weight inches left bearing unlocked low-frequency vibration pickup Lyman-Alpha Magnetometer Flight Unit MAGNETOMETER SATELLITE Magnetometer X-Ray Satellite maximum and minimum minimum amplitudes NASA ounce-inch oz-in payload phase and amplitude phase readings photocell plane 45 degrees Procedure for Vanguard Radiation Shields right bearing Satellite Flight Unit satellite imbalance Satellite Separation Mechanisms satellite were balanced separation device Simkovich and Robert static and dynamic static balance static imbalance test vehicle pay Test Vehicle Sphere third stage Tinius Olsen Type-S Vanguard Satellite Separation vehicle pay load vibration analyzer weight 45 degrees workpiece wrtR X-Ray FU