Propulsion QDR 2 Team #3 Presented by: Greg Davidson Etan Karni

Propulsion Selection Process Master code for end-to-end system integration Propeller analysis with Gold.m Constraints diagram generation Motor analysis using Prop ’02 functions Sizing of Wing, Canard, and Vertical Tails Weight estimator based on construction techniques Final weight and size of aircraft

Graupner Speed 480 Rated horsepower 0.1182 hp @ take-off Motor efficiency 71% Motor constants Kv = 2450 RPM/V Kt = 0.5520 In-oz/amp R = 0.241 Ohms Io = 1.09 Amps Rated number of cells 3 Lithium Rated Amps 10 Amps Rated voltage 8.4 V Weight .221 lbs Price $25.90 (Hobby Lobby)

Graupner Speed 480

Selected Gearbox Gear Ratio (available) 4.1:1 Efficiency 87% Price $13.90 (Hobby Lobby)

Selected Propeller Properties Prop (Calc) 11 in. x 4.4 in Prop (Available) 11 in x 4.7 in RPM 5000 RPM Weight 0.1125 lbs Chord 0.6 in. Airfoil of Propeller Clark-Y Price $3.09 Reynolds Number ~100,000

Propeller Properties

Other Propeller Options Pitch and Diameter APC Slow-Flyer 10 x 7 10 x 4.7 11 x 6 11 x 7

Battery Properties Kokam 3-Cell 640 mAh Continuous Amps 9.6 A Nominal Output 11.1 V Weight (actual) 0.119 lbs Price $31.99

Speed Controller Kokam Super 20 Amp Auto low voltage cutoff (lvc) Continuous Amps Output 20A Peak output current 200A Input operating voltage 2.1 to 18V DC Weight 0.02645 lbs Price $33.99

Propulsion Parts List

Questions?