2. Advisors Mission Design and build a launch vehicle to reach an altitude of 5,280-Feet AGL Deploy Scientific payload Recover all components in a reusable condition Management Team Leaders Faculty Advisor Dr. Kevin Cole NAR/TRA Mentor Thomas Kernes Project Director Matthew Mahlin Safety Coordinator Paul Kubitschek Outreach Coordinator Bryan Kubitschek Airframe Team Paul Kubitschek Avionics TeamPayload TeamPropulsion Team 2 University of Nebraska - Lincoln

3. 3

4. 4

5. Length:124.5” Diameter:5.5” Nose Cone:27.5”Von Kármán (LD-Haack), 1:5 Fineness Fin Span:14.5”(3-fin configuration) Weight:23.7lbs(No Motor – No Payload – Estimated) Motor Mount:98mm37” long – rear retaining ring 5 University of Nebraska - Lincoln

6. 6

7. Characteristics Von Kármán (LD-Haack) 1:5 Fineness Communications BRB 900 900 MHz 100 mW Eagle Tree Systems 2.4 GHz 500 mW 7 University of Nebraska - Lincoln

8. Components Avionics bay Mounting Side Hatch Material Blue Tube Fiberglass (8oz) Glass Sock Dimensions Length - 48 in AV bay length - 12in 8 University of Nebraska - Lincoln

9. Components Perfectflite StrattoLogger Featherweight Raven Concept of Operation Access from Side hatch Activated by external key switches Primary charge fired by both altimeters Secondary charge fires 5 seconds later by Raven 9 University of Nebraska - Lincoln Raven StrattoLogger LiPo

10. 10 University of Nebraska - Lincoln

11. Components Mounting Nosecone Tethered to Sustainer Sustainer Tethered to Booster Forged U-Bolts Concept of Operations Drogue @ Apogee Main @ 1,000-Feet ComponentCharacteristic DimensionComment Main Parachute108”18ft/s descent rate, 24” Spill hole Drogue36”77ft/s descent rate, X-Form Shock Cord52’ and 30’1” Tubular Nylon Nomex Wadding24”Fireproof protection 11 University of Nebraska - Lincoln

12. Components 98mm MMT + Retaining Ring Fins x 3 Coupler Material Blue Tube Fiberglass (8oz) Glass Sock Dimensions Length 48 in 12 University of Nebraska - Lincoln

13. Material 5mm thick Tri-Plywood Fiberglass Vinyl Ester Resin Construction Laser cutting Hand sanding Vacuum Bagging Assembly Mounting to MMT Bond to booster Tip to tip 13 University of Nebraska - Lincoln

14. 14 University of Nebraska - Lincoln

15. 15 University of Nebraska - Lincoln EventSection weight (lbf)Speed(ft/s)Energy (ft-lbf) Apogee1 Nosecone + Sustainer10.677.9998.8 2Booster12.677.91187.3 3UAV(Tethered)9.577.9895.2 Main 1000'1Nosecone41820.1 2Sustainer6.61833.2 3Booster12.61863.4 4UAV(Released)9.553.7

16. 16 University of Nebraska - Lincoln

17. 17 University of Nebraska - Lincoln

18. 18 University of Nebraska - Lincoln Wind speed (MPH)Predicted Altitude (Feet AGL) 55340 105331 155314 205263

19. Candidate Motor Aerotech L1170FJ-P 75mm motor Simulation Parameters 12 foot guide rail 19 University of Nebraska - Lincoln

20. 20 University of Nebraska - Lincoln DescentTime (s) Wind Speed(MPH) (Ft/s ) Drift Distance(ft (1000’ Deployment) 108.1000 57.3792.7 108.11014.61585.4 108.115222378.2 (500’ Deployment) 88.12029.32584.2

21. 21 University of Nebraska - Lincoln

22. 22 University of Nebraska - Lincoln Subsystem Test PlanVerification MetricStatus Altimeter Accuracy -Subscale Test flights-Agreement between altimeters Completed March Recovery System Deployment -Ground Simulation -Test flights -Components ejected forcefully -Visually confirm deployment -Vehicle recovered intact -Completed February - Completed March Tracking Equipment -Ground distance test -Test flights -Line of sight transmission at least 1 mile -Successful tracking after launch -Completed March 1.5 mile range -Completed March Motor integration -Test fit -Fit adapter if needed -No shifting of motor -Motor housed internally Completed February Altitude -Full scale test flight for both candidate motors -Add ballast as needed -Compare recorded altitudes with that of simulations Completed March: 7% difference

23. 23 University of Nebraska - Lincoln

24. 24 University of Nebraska - Lincoln

25. 25 University of Nebraska - Lincoln

26. 26 University of Nebraska - Lincoln

27. Altitude Comparison Actual = 3341’ Simulated = 3592’ Actual is 7% less than Simulate Drag Characteristics 27 University of Nebraska - Lincoln

28. 28 University of Nebraska - Lincoln

29. 29 University of Nebraska - Lincoln

30. 30 University of Nebraska - Lincoln

31. 31 University of Nebraska - Lincoln

32. Subsystem Pre-Flight Test PlanVerification MetricTarget Date Payload Airframe Drop test Visually verify wind deployment February 2012 Primary and secondary windbelt systems Detect induced voltage in coils Airspeed/resonance relationship Voltage detected in coil > 30mV and exhibits period structure (not noise) December 2011 Active windbelt tension control system Interface micro with servo/belt Interface micro with anemometer Frequency of voltage waveform = expected frequency for known wind speed January 2012 Sensors and transmitter Compare sensor data to know values Transmit data Sensor output values (received data ) w/in 1% of known values (transmitted data) January 2012 Power conversion system Input several AC waveforms and verify DC conversion/smoothing via scope Measure via micro and compare to scope value Visually verify smoothed DC waveform/micro measurement w/in 1% of scope measurement February 2012 32

33. 33 University of Nebraska - Lincoln

34. 34 University of Nebraska - Lincoln

35. Upcoming Engineering Week 2012 Astronomy Day 2012 Current Collaborations Water Rocketry Demonstration Construction Launch Stomp Rockets 35 University of Nebraska - Lincoln

36. 36 University of Nebraska - Lincoln