1. Aerodynamics PDR # 2 AAE451 – Team 3 November 18, 2003
Brian Chesko
Brian Hronchek
Ted Light
Doug Mousseau
Brent Robbins
Emil Tchilian

2. Conventional Tail – NACA 0012
Aircraft Walk Around
Wing Span = 14.6 ft
A/C Length = 10 ft
Conventional Tail – NACA 0012
Pusher
Internal Pod
Low wing – Clark Y
Tricycle Gear

3. Dimensions Wing Horizontal Tail Vertical Tail* Area (ft2) 42.9 12 2.4
Aspect Ratio 5 3
0.6
*Still some issues with sizing vertical tail

4. Alpha L=0 Determination
Xfoil runs of ClarkY foil
at cruise and takeoff
Cruise: αL=0= -3.5°
Takeoff no flap: αL=0 = -3.8°
Takeoff 10° flap: αL=0 = -7°
Takeoff 15° flap: αL=0 = -7.8°

5. Flaperons necessary to meet stall requirements
Stall Performance
CL needed = 1.19
Wing without flaps reaches CL at a=13°
Wing stall possible
Wing with 15° flap deflection reaches CL at 11°
Required CL
Flaperons necessary to meet stall requirements

6. NACA Empirical Data For ClarkY Foil
Approximate Stall angle ~14°

7. Stall Performance
Required CL
CD = at required CL

8. Cruise Performance CL needed = 0.366 CL achieved at a = 1.9°
Total Lift produced = 57 lbf
Total Drag = 2.6 lbf, L/D =21

9. NACA Empirical Data For ClarkY Foil
is approximately 22

10. Operating Parameters Stall 1.19 11° 15° 0.119 10 T/O 0.989 8.8° 0.084CL a
Flap Deflection CD
L/D
Stall
1.19
11°
15°
0.119 10
T/O
0.989
8.8°
0.084 12
Cruise
0.366
1.9° 0°
0.014 24

11. Horizontal Tail CL = -0.32 required of horizontal tail at cruise
AR = 3
Span = 6
Chord = 2
Requires Tail Angle of -5°
CL = required of horizontal tail at cruise

12. Fuselage Drag Assumptions Cf for turbulent flow
Fuselage approximated as box
Interference factor, Q, 1.2 (low end of unfilleted low wings)
FF from Raymer Eq. (12.31)
1.33 ft
0.67 ft
5 ft

13. Drag Build Up at Cruise Component CD Drag Wing 0.014 2.6 lbf Fuselage
0.64 lbf
Horizontal Tail
0.0179
0.75 lbf
More to come…

14. Summary Wing Horizontal Tail Foil: ClarkY Foil: NACA 0012
Taper Ratio = 1
Dihedral Angle = 5°
AR = 5
S = 42 ft2
Angle of Incidence = 2°
Horizontal Tail
Foil: NACA 0012
Taper Ratio = 1
Dihedral Angle = 0º
AR = 3
S = 12 ft2
Angle of Incidence = -5°

15. Questions?