1. 1 Structures QDR1 Ashley Brawner Neelam Datta Xing Huang Jesse Jones Team 2: Balsa to the Wall Matt Negilski Mike Palumbo Chris Selby Tara Trafton

2. 2 Overview Geometric layout of wing structure Material properties Analysis of wing loads CG estimate

3. 3 Wing Structure Geometry

4. 4 Material Properties Material Properties Table E-Glass Fiber S-Glass Fiber E-glass (Fabric) Balsa Wood Carbon Fiber Polyurethane Foam Density (lbs/in^3)0.0710.0720.0680.0540.0650.0046 Tensile Strength (ksi)16525062.80.163250.16 Shear Strength (ksi)12.91012.20.5410.60.2 Longitudinal Young's Modulus (10^6 psi)66.53.550.009421.30.0051 Transverse Young's Modulus (10^6 psi)1.51.63.450.00941.50.0051 Shear Modulus (10^6 psi)0.620.660.680.008510.00145 Poisson's Ratio0.280.290.110.40.270.25

5. 5 Load Factor – Max Lift

6. 6 Load Factor – Level Turn

7. 7 Load Factor – Vertical Turn

8. 8 Wing Centroid

9. 9 Bending Analysis

10. 10 Twisting Analysis T = Torque Cm = Moment Coefficient c = Chord length q = shear flow A_bar = Airfoil cross-sectional area theta = twist angle/unit length

11. 11 Twisting Analysis

12. 12 Load Analysis

13. 13 CG Approximation

14. 14 CG Approximation BALSA Componentweight (lb)x pos (in.)y pos (in.) Structure2.2615.040.81 Speed Controller0.266.001.34 Batteries1.252.001.34 Motor0.595.001.34 Payload1.003.00-0.50 Gyro0.013.501.75 Tail Servos0.087.500.54 Receiver0.043.501.00 Total Weight5.50 CG 8.150.77 Aerodynamic Center 9.261.34

15. 15 Questions?