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Critical Design Review

Critical Design Review. NASA University Student Launch Initiative University of Nebraska–Lincoln 2012-2013. Team Overview. Mission Build a launch vehicle to reach an 5,280 feet altitude Use a dual-deployment recovery system Deploy a payload at 1,500 feet

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Critical Design Review

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  1. Critical Design Review NASA University Student Launch Initiative University of Nebraska–Lincoln 2012-2013

  2. Team Overview • Mission • Build a launch vehicle to reach an 5,280 feet altitude • Use a dual-deployment recovery system • Deploy a payload at 1,500 feet • Recover all components in a relaunchable condition

  3. Preliminary Design Discussion

  4. Vehicle Overview

  5. Stability Characteristics • OpenRocket Model • Will need to be verified • Mass (with motor): 32.8 lbs • CG: 68.3 inches • CP: 78.7 inches

  6. Launch Characteristics • Candidate Motors • 75mm diameter • AMW L900RR-P • Simulation Parameters • 10 foot guide rail • Rail velocity: 43.32 feet/sec • Thrust-to-weight ratio: 8.33:1

  7. Recovery • Mounting • Nosecone Tethered to Transition • Transition Tethered to Booster • Forged U-Bolts • Concept of Operations • Drogue @ Apogee • Main @ 1,500-Feet • Main parachute 84” in diameter, 162” long • Drogue shute 36” in diameter, X-form • 52” and 30” of shock chord, 1 inch tubular nylon • Nomex wadding, 24” length

  8. Drift analysis

  9. Kinetic Energy

  10. Test • Structural test • 150+ lbs man • No bending

  11. Subscale Launch • Projected • Apogee: 1575 • Max. velocity 434 f/s (Mach 0.39) • Weight: 1.56 lbs

  12. Subscale • Actual results • Apogee 1357’ • Max Vel. 459 ft/s • Weight 1.873

  13. Final Payload Design In our mission, the desired direction will be a GPS transmitter on the ground with the receiver in the probe. The goal is to have the GPS guide the probe using the systems on board to “Home base” which will be the launch pad. The scientific significance of this UAV is to introduce a convenience factor into recovery of rocket parts that have implicated the same hardware as this UAV will have.

  14. Assembly

  15. Nosecone • Characteristics • Von Kármán (LD-Haack) • 5.5:1 Fineness • Communications • BRB 900 GPS Transmitter • Antenna

  16. Transition Assembly • Components • 2 6-inch bulkheads • One small step for man • One 6-inch diameter polycarbonate plate • One GoPro camera • Two eyebolts • Material • Alumium case • Dimensions • Length – 6”

  17. Avionics • Components • Perfectflite StrattoLogger • Featherweight Raven • Concept of Operation • Activated by external key switches • Primary charge fired by both altimeters • Secondary charge fires 5 seconds later by Raven

  18. Functional Requirements

  19. Functional Requirements

  20. Schedule

  21. Outreach • Previous Activities • Engineering Week • Astronomy Day • Lockheed Martin Space Day • Current Collaboration • Water rocketry • Hosting Robotic Competition • Connect a Million minds

  22. Questions?

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