1. Team Honey Badger R.A.H.D. Critical Design Review October 18, 2012 Josh Power Karyn Science Kyle Team Leader C+DH Annie C+DH Zach Budget + Science C&DH Jason Thermal + Structure Gabe Thermal + Structure Logan Thermal + Structure

2. Mission Overview Objectives: Measure gamma radiation during ascent Expecting to discover ionizing radiating increases as a function of altitude Measure air quality during ascent Expecting to discover air to have fewer dust particles per million Record HD video Spike interest of younger students in math, science, and engineering Measure environmental factors Temperature, pressure, humidity Collect acceleration engineering data Meet all RFP requirements Why? Public outreach Verify that atmosphere is necessary for radiation dampening

3. Level 0 Requirements 0.1Meet all RFP Requirements 0.2Record HD Video during ascent/descent 0.3Measure gamma radiation during ascent/descent 0.4Collect atmospheric dust readings ascent/descent Level 1 Requirements (1.1) Requirements 1.10Attach R.A.H.D. to hydrogen balloon via centralized string 1.11Have internal temperature remain above 10°C 1.12Keep total mass of R.A.H.D. under 1.125 kg 1.13Keep budget below $250 1.14Follow safety protocol 1.15Launch R.A.H.D. on 12/01/12 1.16Build R.A.H.D. to endure flight conditions to be able to function again 1.17Store all data on SD Card via Arduino 1.18Measure internal and external temperature 1.19Contact Info and American Flag will be placed on outside 1.110Measure acceleration on (x,y,z) axis 1.111Build foam core structure to protect internal components

4. Requirements (1.2) 1.2Record 720p video via GoPro HD Hero Requirements (1.3) 1.3Geiger counter via Arduino Requirements (1.4) 1.4Optical dust sensor via Arduino Requirements Flow Down (cont.)

5. Design How? Gamma radiation - Geiger counter Dust particle concentration – Optical dust sensor HD video – GoPro HD Hero Temperature – Thermometer Humidity – Humidity sensor Pressure – Pressure sensor (x,y,z) orientation – Accelerometer

6. Design Drawing

7. Functional Block Diagram

8. Budget Total mass: 781.9 g (0.782 kg) Total cost: $317.91

9. Schedule

10. Test Plan 10-31-12 Drop test Drop foam core prototype from 5m Cold temperature test Cooler of dry ice with heater on and thermometer Whip test Swing foam core prototype with internal mass representations around violently 11-7-12 Subsystem functionality test Test functionality of all subsystems with visual representation that data is being obtained and recorded Geiger counter - Professor Wagner’s help Optical Dust Sensor – put dust in air

11. What We’re Expecting Dust SensorGeiger CounterPressure Sensor External TempInternal TempHumidity t t t ttt ppm psi %°C

12. Biggest Worries Total failure Air getting through our optical dust sensor without getting too cold to function Miscommunication between subsystems