1. Propulsion PDR AAE 451 Fall 2006 Team Whishy Washy Tung Tran Mark Koch
Matt Drodofsky Matt Lossmann
Ravi Patel Ki-bom Kim
Haris Md Ishak Andrew Martin

2. Summary Revisit Sizing Selection Procedure
Define Advanced ratio and Propeller parameters
Propeller selection
Motor, Gear Box, Speed controller selection
Battery analysis

3. Review of Vehicle Sizing

4. Review of Vehicle Sizing

5. Selection Procedure Find the best endurance flight speed
Happens at (Cd/Cl3/2)min
Size Propeller for flying at Max endurance speed
Adjust RPM’s and diameter for optimum propeller efficiency
Gear box and motor were sized off of max speed
Gear box sized for optimum propeller efficiency
Motor sized by power required and motocalc

6. Advanced Ratio on Thrust Coefficient

7. Advance Ratio On Power Coefficient

8. Advanced Ratio on Propeller Efficiency

9. Endurance Flight Clendurance = 1.38 Cdendurance = .0960
Vendurance = 30.8 ft/s

10. Endurance Flight
(Cd/Cl3/2)min = .0960

11. Endurance Flight
Venduracne = 31 ft/s
Power = 11.1 ft-lbf/s
Cl = 1.37

12. Endurance Flight D = 16in RPM = 2355 Pitch = 10 deg ηp = .77
Pout = 11.1 ft-lbf/s
Pin = ft-lbf/s
CT = .0293
CP = .0227
J = .6

13. High Speed Flight
Vmax = 130 ft/s
Power = ft-lbf/s
Cl = .4

14. High Speed Flight D = 10 in RPM = 15217 Pitch = 6.25 deg ηp = .77
Pout = ft-lbf/s
Pin = ft-lbf/s
CT = .0293
CP = .0227
J = .6

15. Motor Selection Kontronik Fun 480-42 40A Brushless Motor
Diameter: 1.1 in
Length: 1.9in
Weight: 5.1oz
Number of Cells Input: 6-12
RPM/Volt: 4200
Max RPM: 60,000
Max Constant Current: 40A

16. Speed Controller Kontronik Jazz 40-6-18 Brushless ESC
Number of Cells Input: 6-18
Max Constant Current: 40A
Max Surge Current: 50A
Length: 1.9" (49mm)
Width: 1" (25mm)
Thickness: 0.29" (7.5mm)
LiPo cut off voltage: 3V/cell
Weight: 1.16oz (33g)

17. Gear Box
Gear Ratio of 2.33
Gear efficency of .96

18. Mission Analysis Prelimary battery weight - .22lbs Necessary Battery
Lipo 3000 mAh
1.2 V per cell
2 cells
Weight .3lbs
Range 17min

19. Mission Analysis

20. Questions?