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 500 #1799 Rated horsepower .10728 hp Motor efficiency
72%
Motor constants
Kv = 2360 RPM/V
Kt = In-oz/amp
R = 0.22 Ohms
Io = 1.5 Amps
Rated number of cells
2 Lithium
Rated voltage
7.2 V
Weight
lbs
Price
$16.50 (Hobby Lobby)

4. Graupner Speed 500

5. Selected Gearbox Planetary Gearbox MJ8053 Gear Ratio (optimal) 2.709:1
Gear Ratio (available)
3.33:1
Efficiency
87%
Price
$30.90 (Hobby Lobby)

6. Selected Propeller Properties
APC 11x3.8SF Slo-Flyer Propeller
Prop (Optimal)
11 in. x 3.85 in
Prop (Available)
11 in x 3.8 in
RPM
6000 RPM
Weight
lbs
Chord
0.6 in.
Price
$3.09
Reynolds Number
~100,000

7. Propeller Properties

8. Battery Properties Kokam 2-Cell 640mAh Continuous Amps 9.6A
Nominal Output
7.4V
Weight (actual)
0.049 lbs
Weight (Calculated)
lbs
Price
$31.99

9. 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

10. Questions?