1. 12/11/12 Brandon Campbell & Ernesto Chairez

2. Purpose  Civil Transport  Large Volume  Efficient  Quiet  Long Range

3. Mission Profile  Engine Start/Warm Up  Taxi  Takeoff  Climb  Cruise  Loiter  Descent  Land/Taxi 8 7 2 3 4 5 1 6

4. Mission Specs  Range : 8,000 nm  Cruise Vel. : 505 kts  Cruise alt. : 40,000 ft  Service Ceiling : 45,000 ft  Climb Rate: 2,500 fpm  Takeoff runway: 7,000 ft @ sea level  Passengers : 750  Pilots: 4 Pilots  Crew: 30 flight attendants

5. How is it more efficient?  Blended Wing Body (BWB) No “fuselage” High L/D  Disadvantages Internal layout Lack of windows Negative pitching moment [?]

6. Design Challenges  How do you correct the inherently negative pitching moment? Drooped ailerons  In AAA 2 sets of files ○ With aileron control surfaces ○ With aileron lift surfaces [?]

7. Constraint Curve

8. Design Points PointThrust (lbs.)Thrust-to-WeightWing Area (ft^2)Wing loading (lb/ft^2) 1271,8980.3119,764.8245.00 2271,9890.317812.45113.85 3372,9810.425667.85156.92 4367,2430.415231.86170.00 5362,6530.414858.16183.08 Design Point 2 Was Chosen

9. Airplane Characteristics  Length: 72 ft  Wingspan: 257.5 ft  Takeoff Weight: 889,416.9 lb  Aspect Ratio: 8.5  Wing Airfoil Thickness: 16.5 ft (Supercritical airfoil) Inclination: 0 deg Dihedral : 0 deg Twist : 0 deg ¼ Chord : 19.4 deg Mean Geometric Chord: 40.42 ft

10. Wing Layout

11. Side View

12. Front View

13. Cockpit Layout

14. Aircraft 3-View

15. Engines  CF680E1A3 (x4) 72000 lb thrust (ea) 11225 lb (ea) c j 0.345 lb/lb-hr 8.75 ft diam. X 15 ft long

16. Galleys and Lavatories  Galleys (x2) 2357 lb (ea) 58.4 sq. ft (ea)  Lavatories (x16) 3.3 ft x 3.3 ft 10.89 sq. ft (ea)

17. Control Surfaces  Split ailerons Like B-2 Spirit AAA does this via matching spoiler ○ Regular Aileron ○ Spoiler placed above Aileron

18. Landing Gear  Nose Gear (x1) 2 Wheels 18 in (w) x (48) (diam.) Press. 200 psi  Main Gear (x4) 4 Wheels 18 in (w) x 50 in (diam.) Press. 200 psi

19. AirAwesome cg Shift  Symmetry about x-axis  Fully loaded X cg shift 39.37-51.8 ft Corresponding Z cg shift 10.98-6.8 ft  Large cg shift outside normal range AirAwesome: 149.16 in Civil transport average [3] : 26-91 in  Mean geometric cord fraction AirAwesome: 0.3075 Civil transport average [3] : 0.12-0.32

20. References  [1] http://freeimagefinder.com/detail/5009265587.html  [2] http://en.wikipedia.org/wiki/File:CF6-6_engine_cutaway.jpg  [3] Airplane Design, Part II: Preliminary Configuration Design and Integration of the Propulsion System, Dr. Jan Roskam, 2004  [?] http://en.wikipedia.org/wiki/File:US_Air_Force_B-2_Spirit.jpg  [?] http://www.arcair.com/awa01/101-200/awa133-F4F- phantom/images/Mvc-014s.jpg (drooped aileron)

21. Questions?

22. Backup Slides

23. Cranked Wing

24. Weight Estimates