• CALCULATING AERODYNAMIC COEFFICIENTS FOR A NASA APOLLO BODY USING TELEMETRY DATA FROM FREE FLIGHT RANGE TESTING

      Brown, T. Gordon; Vong, Timothy; Topper, Ben; U.S. Army Research Laboratory; Data Matrix Solutions, Inc (International Foundation for Telemetering, 2007-10)
      The U.S. Army Research Laboratory (ARL) was requested by the National Aeronautics and Space Administration (NASA) Langley Research Center (LaRC) to perform a free-flight experiment with a telemetry (TM) instrumented sub-scaled Apollo shaped reentry vehicle in order to determine its aerodynamic coefficients. ARL has developed a unique flight diagnostic capability for reconstructing flight trajectory and determining aerodynamic coefficients of projectiles by using sensor data telemetered from free flight experiments. A custom launch package was designed for this experiment that included the Apollo shaped projectile, which housed a modular telemetry unit, and a rapid prototyped sabot. The experiment was able to produce estimates for aerodynamic coefficients that were considered accurate and this technique is appealing to NASA for the development of their spacecraft in the future.
    • MEASUREMENT OF IN-FLIGHT MOTION CHARACTERISTICS OF A HIGH-G LAUNCHED FLARESTABILIZED PROJECTILE WITH ON-BOARD TELEMETRY

      Brown, T. Gordon; Bukowski, Ed; Ilg, Mark; Brandon, Fred; U.S. Army Research Laboratory; Dynamic Science. Inc (International Foundation for Telemetering, 2007-10)
      In pursuit to understanding the flight behavior and characterizing the stability of a flarestabilized projectile, an experiment was conducted to assess the robustness of an inertial sensor suite the size of a dime (17.5mm) by integrating to a telemetry system for recording. The system had to survive launch acceleration exceeding 25,000G’s. This is the beginning of an effort to reduce the size of telemetry systems and diagnostic devices for use in medium caliber munitions and smaller. A description of the telemetry system and subsystem will be presented along with the results.