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

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

Review of Vehicle Sizing

Review of Vehicle Sizing

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

Advanced Ratio on Thrust Coefficient

Advance Ratio On Power Coefficient

Advanced Ratio on Propeller Efficiency

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

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

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

Endurance Flight D = 16in RPM = 2355 Pitch = 10 deg ηp = .77 Pout = 11.1 ft-lbf/s Pin = 14.04 ft-lbf/s CT = .0293 CP = .0227 J = .6

High Speed Flight Vmax = 130 ft/s Power = 268.5 ft-lbf/s Cl = .4

High Speed Flight D = 10 in RPM = 15217 Pitch = 6.25 deg ηp = .77 Pout = 268.5 ft-lbf/s Pin = 334.9 ft-lbf/s CT = .0293 CP = .0227 J = .6

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

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)

Gear Box Gear Ratio of 2.33 Gear efficency of .96

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

Mission Analysis

Questions?