1. November 12, 2003QDR1 Team 5 Structures and Weights QDR #2 Scott Bird Mike Downes Kelby Haase Grant Hile Cyrus Sigari Sarah Umberger Jen Watson

2. November 12, 2003QDR2 Preview Walk Around Sizing Criteria Material Selection Wing Box Properties Pod Support

3. November 12, 2003QDR3 Walk-Around Data Boom Pod Engine Tail Dragging Landing Gear Pod Entrance

4. November 12, 2003QDR4 Wing Box Design Sizing Criteria Maximum Bending Stress –I y >=M y *z/σ xx θ<1 degree at tip Deflection at tip <=2in c 1/4cLift b a

5. November 12, 2003QDR5 Wing Box Properties AluminumBalsaSprucePine Front Web thickness (in).12 .1252.124  2.125.66 .75.708 .75 Rear Web thickness (in).024 .025.025.12 .125.12 .125 Wing Weight (lbf) Front Spar Only 9.259.285.757.6 Front Spar- Tip Deflection Limiting Criteria Rear Spar- Tip Rotation Limiting Criteria

6. November 12, 2003QDR6 Final Wing Box Properties Material –Spruce (lowest weight) Heights defined by airfoil Front Spar –I-beam –%20 chord Rear Spar –Rectangle –%60 chord.125in 2.25in 1.2in.75in 2.88in

7. November 12, 2003QDR7 Performance of Wing Box Θ=.072 deg Tip deflection= 1.77 inches Total Wing Weight= –Front Spar –+ Rear Spar –+ 15 Ribs –=7.4401 lbs

8. November 12, 2003QDR8 Pod Support My=q*L^2/12 –My-maximum bending stress –q=distributed load (1/2 pod weight) –L=length I y >=M y *z/σ xx L q

9. November 12, 2003QDR9 Fuselage Layout

10. November 12, 2003QDR10 Results to come…. Wing Failure Analysis Wing Attachment Boom Sizing Fuselage Structure Analysis Tail Structure

11. November 12, 2003QDR11 Questions?

12. November 12, 2003QDR12 Material Properties PropertyAluminumBalsaSprucePine Max bending stress (lb/in^2) 47e32.2e356566.9e3 Shear Modulus (lb/in^2) 4e63.13e41.73e59.38e4 Young’s Modulus (lb/in^2) 10e6.5e61.6e61.5e6 Density (lb/in^3).0995.0065.0145.0185 ” Selection and use of Engineering Materials ”, J.A. Charles

13. November 12, 2003QDR13 Appendix (References) ”Mechanics of Materials”, James Gere ”Selection and use of Engineering Materials”, J.A. Charles hfhf

14. November 12, 2003QDR14 Span-wise Loading Assumed Elliptical Loading Maximum at Root Max bending at root =245 lbf-ft

15. November 12, 2003QDR15 Wing Box Properties (Rotation Requirements) Requirement: θ<1 degree at tip –T=Lift*(distance to shear center) –L=Half span –dis=distance between spars trtr b hrhr tftf hfhf

16. November 12, 2003QDR16 Wing Tip Deflection for Aluminum

17. November 12, 2003QDR17 Weight of Wing Structure (half span of front spar) Weight=density*Cross sectional area*length