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Preliminary Design review

Windward Community College University of Hawaii 2011-2012. Preliminary Design review. Rocket : Leo Hano Payloads: Walter & ASTRID. Rocket 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. Windward Community College University of Hawaii 2011-2012 Preliminary Design review

  2. Rocket: Leo HanoPayloads: Walter & ASTRID

  3. Rocket 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

  5. Rocket Design Details • Length: 127.13” • Diameter: 6” • Unloaded Weight: 643 oz. • Weight: 804 oz. • Materials: G10 Fiberglass • Recovery: Dual Deployment, electronic • Propulsion: AEROTECH L1500T

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

  7. Rocket Stability • Center of Pressure: 90.25” • Center of Gravity: 75.23” • Over-Stable

  8. Motor Selection • AEROTECH L1500T • Total Impulse: 5120 Ns • Casing: 98/5120 • Average Thrust: 330 lbs • Peak Thrust: 380 lbs • Burn Time: ~3.5 sec • Thrust to weight: ~6.7

  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. Walter • Three perpendicular coils around a non-magnetic sphere • 12-bit ADC • Operation Amp • EEPROM • BS2p Micro-Controller • 3-axis accelerometer (comparison)

  11. ASTRID • Arduino Nano • Xbee-Pro • BMP085 – Temperature, Pressure, Altitude • DHT11 – Humidity • TSL2561 – Light Sensor • BPW34 – Photodiode • TSL235R – Light to frequency converter • TTL Serial JPEG – Camera

  12. Timeline

  13. Important Dates • Static test: 12/15/11 • Deployment test: 2/11/12 • Full-Scale Low-Power test: 3/11/12

  14. 1:3.7 Scale Drag Shoe

  15. pau

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