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Preliminary Design review

Preliminary Design review. Windward Community College University of Hawaii 2010-2011. Project: Rocket; Leo Hano Payload; Hula Hoop. Design Criteria. Build a Rocket to be launched to an altitude of 5280 ft. (1 mile) Rocket must carry a scientific payload Rocket must return safely.

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Preliminary Design review

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  1. Preliminary Design review Windward Community College University of Hawaii 2010-2011

  2. Project: Rocket; Leo HanoPayload; Hula Hoop

  3. Design Criteria • Build a Rocket to be launched to an altitude of 5280 ft. (1 mile) • Rocket must carry a scientific payload • Rocket must return safely

  4. Flight Profile Boost Phase Coast Phase Apogee Drogue Deployed Rapid Decent Phase ~60 ft/sec Main Decent Phase ~20 ft/sec

  5. Rocket Design Details • Length: 121” • Diameter: 6” • Weight: 15 lbs., unloaded • Weight: ~20 lbs., on the pad • Materials: G10 Fiberglass • Recovery: Dual Deployment, electronic • Propulsion: 75mm AMW L777WW

  6. Characteristics • GPSFlight in nose cone • Variable Drag Configuration (VDR) • Four fin design Avionics Featherweight Raven-2 PerfectFlight MAWD Dual deployment

  7. Rocket Stability • Center of Pressure: 91.70” • Center of Gravity: 75.27” • Caliber: 2.74 • Marginally Over-stable

  8. Motor Selection • Animal Motor Works L777WW • Total Impulse: 3180 Ns • Casing: 75mm X 497mm • Average Thrust: 774.47 N • Peak Thrust: 1000.16 N • Thrust to weight: ~7.5

  9. Motor Justification Drag force is linear to ~30 degrees Approximate altitude loss ~1.2%/degree 30 degree deployment yields ~36% loss Must yield max altitude below 7180 ft and above 5280 ft

  10. Hula Hoop • Three perpendicular coils around a non-magnetic sphere • 24-bit ADC • EEPROM • BS2p Micro-Controller • 3-axis accelerometer (comparison)

  11. Timeline

  12. Important Dates • Recovery deployment testing: 1/22/11 • Full-Scale Low-Power test: 3/13/11

  13. 1:3.7 Scale Drag Shoe

  14. pau

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