1. 1 Propulsion PDR Ashley Brawner Matt Negilski Neelam Datta Mike Palumbo Xing Huang Chris Selby Jesse Jones Tara Trafton AAE451: Balsa to the Wall Team 2

2. 2 Presentation Overview Why a Ducted Fan?  Pros  Cons Performance Requirements  Thrust  Weight  Power Ducted Fans Electric Motors Batteries Duct Design  Fuselage Integration

3. 3 Why a Ducted Fan? Pros  No Propeller Tip Downwash  Direct Drive  Hand Launch / Belly Landing  Higher Static Thrust Cons  Duct Profile Drag  Cost of Duct  Capable Motor  High RPM

4. 4 Performance Requirements Power Loading 3.0 Weight Estimate 5.42 lb Power Required 1.8 hp ** Preliminary Sizing

5. 5 Ducted Fan Candidates ManufacturerModelDiameterWeightMax RPMCost [ in ][ lbs ][ RPM ][ $ ] WeMoTecMidi Fan3.50.23135,000$74.95 WeMoTecMini Fan 4802.720.13245,000$53.90 Great PlanesHyperflow2.230.08149,000$30.00 VASAVasaFan 652.60.07745,000$60.00

6. 6 Electric Motor Candidates ManufacturerClassAvg. WeightAvg. Cost [ lbs ][ $ ] Kontronik4000.24$130.00 Kontronik4800.31$130.00 Kontronik5000.44$144.00 Kontronik6000.55$150.00

7. 7 Electric Motor Data http://www.kontronik.com/index2e.htm

8. 8 Electric Motor Data Cont’d http://www.kontronik.com/index2e.htm

9. 9 Electric Motor Data Cont’d http://www.kontronik.com/index2e.htm

10. 10 Batteries TypeVoltageAvg. WeightTotal WeightAvg. CostTotal Cost [ V ][ lbs ] [ $ ] NiMH1.20 per Cell0.09 per Cell2.70$3.00 per Cell$90.00 NiCd1.20 per Cell0.13 per Cell3.90$2.70 per Cell$81.00 LiPo3.70 per Cell0.13 per Cell1.30$25.00 per Cell$200.00

11. 11 Propulsion Summary Motor  Kontronik FUN 600–13 Kv = 1300 RPM/V Max Constant Current: 40 A Max # Cells: 30 Max Voltage: 36 V Battery  30 Cells NiMH @ 1.2 V /cell Speed Controller  Kontronik Jazz 55-10-32 Max Surge Current: 70 A Max # Cells: 32 Weight: 0.08 lbs

12. 12 Propulsion Summary Cont’d WeMoTec Midi Fan  Fan Dia: 3.5 in  Max RPM: 36,000  Weight: 0.231 lbs Performance  Power: 1.8 hp  Static Thrust: 4.86 lbf

13. 13 Ducted Fan Measurements

14. 14 Duct Design Slightly Converging Inlet  129% of Fan Swept Area Funnel Air into Fan Opposite of Turbo Jet Straight Outlet  99 % of FSA Promote Flow Opposite of Turbo Jet “Ducted Fan Design

15. 15 Duct Design Cont’d WeMoTec Midi Fan

16. 16 Duct Design Cont’d Duct Measurements 2~3 in ~1 in

17. 17 Fuselage Integration Duct Placement  Duct will be integrated on top of fuselage  Promote external boundary layer Ingestion  Less drag than mounting a nacelle  Room for payload below duct

18. 18 Propulsion Cost Analysis To Achieve Mission Requirements  Motor$ 150.00  Batteries$ 90.00  Ducted Fan$ 75.00  Materials ~$ 50.00  Sum$365.00

19. 19 Questions?