1. Preliminary / Interim Design Team 6 November 9, 2010

2. UAV Team Specializations TJ Worden – Wing Design Matthew Martin – Fuselage Configuration David Neira – Power & Propulsion Josh Mellen – Electronics & Control (Hardware) Ona Okonkwo – Electronics & Control (Software) Josiah Shearon – Materials Selection & Fabrication

3. Presentation Outline Scoring Sensitivity Study Airframe Layout Subsystem Breakdown Interim Design Summary

4. Rule Change Previous Final

5. Scoring Sensitivity Study

9. Airframe Layout– Fuselage Figure of MeritWeighting FactorDouble BoomSingle BoomBlended Body Weight0.35135 Drag0.20245 Ergonomics0.15251 Durability0.10345 Storage Capacity0.20541 Total1.002.353.803.60

10. Airframe Layout – Wing Figure of Merit Weighting Factor MonoplaneBiplaneCanardDelta WingFlying Wing Weight0.1541341 Drag0.2042213 Lift0.3035434 Portability0.1052241 Stability0.1545335 Manufacturability0.1054231 Total1.003.903.402.902.852.90

11. Airframe Layout - Tail Figure of MeritWeighting FactorConventionalV-TailTwin TailT-Tail Weight0.153432 Drag0.204533 Stability0.355233 Maneuverability0.205244 Manufacturability0.104233 Total1.004.402.903.203.05

12. Airframe Layout– Propeller Figure of Merit Weighting Factor Single Tractor Single PusherDual Tractors Tractor / Pusher Ducted Fan Weight0.3055331 Efficiency0.3043325 Launch Recovery0.3032544 Complexity0.1054221 Total1.004.103.403.502.903.10

13. Preliminary Layout

14. Motor Specifications Himax HA2025-4200 Geared Electric Brushless Inrunner Lightweight High efficiency High torque Durable Specs: Power: 175W KV: 4200 Gear Ratios: 6.6:1, 5.3:1, 4.4:1 ESC Rating: 15A Weight: 80g Shaft Diameter: 3mm

15. Motor and Prop Table

16. ELECTRONICS & CONTROLS Note: Toxicity in reference to the two types of batteries mentioned above. Batteries Selection FOMNiCdNiMH Nominal Cell Voltage1.2V Energy Density50-150140-300 Cycle Durability20001500 Memory EffectYN Internal ResistanceVery LowLow ToxicityMediumLow NiMH best candidate based on Energy Density and NiCd’s Memory Effect; Li-Po not allowed Competition Requirement: 20A ATO Blade Fuse

17. ELECTRONICS & CONTROLS Cell packs Offer range of Capacity, Weight and Cost Fixed dimensions Individual Cells Offer more versatility in weight, size and cost Requires soldering Battery Selection Figures of Merit Supercharge Orion 1500 Speedpack 2400 Traxxis Power Cell 6 Cell 1500 Speedpack 1800 Individual Cell – Elite 1500 Cell Voltage7.2 V 1.2V Amp-Hours1600 mAh2400 mAh1500 mAh18001500 Weight5.6 oz12 oz8 oz10.4 oz0.81 oz Dimensions (in 3 )4.4 x 2.2 x 0.97.7 x 2 x 15.6 x 3 x 17.6 x 2.1 x 1.21.13 x 0.66 x 0.66 Cost$21.15$20.81$11.09$11.68$2.25

18. ELECTRONICS & CONTROLS Servo Controller Requirements Programmable for Fail-Safe Maneuver Support for 4 Servos, 1 Gyroscope Micro Maestro 6-ch USB Servo ($19) ESC Requirements ESC Continuous Amp higher than Motor ESC Rating Programmable; Can control at least 1 Motor Propulsion Battery Pack limited to 0.75lbs Controllers Selection Figures of MeritCC Thunderbird 18CC Phoenix 25Atlas Black 20 Weight0.6 oz 0.625 oz Size1.32x0.33x0.90 in1.08x0.91x0.16 in1.875x0.875x0.375 in Continuous Amp182520 Cost$33.95$67.95$38.99

19. Electronics & Controls Spektrum DX6i 6-channel transmitter. Transmits on 2.4GHz band Practically safe from internal and external Radio Frequency (RF) AR6200 6-channel receiver. Combined internal and external receiver Safe RF linking Transmitter /Receiver

20. Electronics & Controls Gyroscopes – Device measuring orientation, based on the principles of conservation of angular momentum. Accelerometer – A device that measures proper acceleration relative to freefall. None – A situation in which no stabilizing instrument would be used. Sensors Figure of MeritWeighting FactorGyroscopesAccelerometerNone Weight0.25535 Complexity0.20345 Effectiveness0.55511 Total1.004.602.102.80

21. Electronics & Controls Gyroscopes STMicroelectronics MEMS GyroscopesFutaba GY520KX870016A - GP750 Weight< 5 g6.9 g14 g Capability555 Current Draw6.8 mA40 mA (without servo)<80 mA Operating voltagefrom 2.7 to 3.6 Vfrom 3.8 to 6.0 Vfrom 4.5 to 7.0 V Size< 20 mm20.8 x 20.8 x 11mm26x25x11 mm Price$7$150$167

22. Electronics & Controls Integrated Debugging Environment (IDE) – Microsoft Visual Studio 2010 Allows programming in C language Already accustomed to the software Free of charge Radio Fail-Safe Maneuver Kill Throttle Roll Right Yaw Right Nose Up Software

23. Wing Design AirfoilMax ClStall Angle (deg) Max Aerodynamic Efficiency (Cl/Cd) α at Max Eff (deg)Cl at α NACA 44121.5512.0070.606.001.20 NACA 65-4181.459.0048.306.000.97 Eppler 3951.659.0085.296.001.45 DAE 111.7815.0056.0010.001.56

24. Wing Sizing Assumptions Empty weight = 1.25 lbs Payload/Weight Ratio = 3:1 Launch Speed = 22 MPH Derived dimensions Wing Area = 336 in 2 Wingspan = 48 in Chord Length = 7 in Aspect Ratio = 6.85

25. Fuselage Front View Top View

26. Interim Design

27. Future Work December 1 Fabricate Interim Design December 1, 2010 – January 1, 2011 Test and refine Iterate Competition: April 15-17, 2011

28. Questions?