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

2. 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

3. Graupner Speed 480 Rated horsepower 0.1182 hp @ take-off
Motor efficiency
71%
Motor constants
Kv = 2450 RPM/V
Kt = In-oz/amp
R = 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)

4. Graupner Speed 480

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

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

7. Propeller Properties

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

9. 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

10. 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
lbs
Price
$33.99

11. Propulsion Parts List

12. Questions?