1. Structures and Weights 1 QDR
Aether Aerospace
“Angry Mosquito”
AAE 451 Team 3
September 14, 2006
Mark Davis Ashley Gordon
Hank Kneitz Ryan Mulligan
Joshua Rodewald Brandon Wampler
Mathieu Hautier Samantha Pearcy

2. Weight and Balance
February 22, 2019
AAE 451, Aether Aerospace

3. Wing Structure Solid Expanded Polypropylene (EPP) foam wing
Carbon fiber composite spars through EPP
No stringers, no ribs
Fiberglass/epoxy structural skin?
EPP
spars
February 22, 2019
AAE 451, Aether Aerospace

4. Material Properties EPP Carbon/Epoxy AS4 Young’s Modulus:
E=135 GPa
Density:
ρ=99.57 lb/ft^3
Shear Modulus:
G=7 GPa
EPP
ρ=1.3 lb/ft^3
February 22, 2019
AAE 451, Aether Aerospace

5. Wing Loading 0.45 taper ratio to approximate elliptic loading
Maximum bending load at root chord
Maximum torsion load at tip chord
February 22, 2019
AAE 451, Aether Aerospace

6. Torsion Loading for foam only
Using , found T by
Used T to find the elemental angle of twist,
Added elemental twist to find total twist
MH24 airfoil XFOIL data
February 22, 2019
AAE 451, Aether Aerospace

7. Bending Loads for foam only
February 22, 2019
AAE 451, Aether Aerospace

8. Bending Loads for foam only
Final deflexion: 0.56 ft
Maximum bending deflexion does not occur on either tip or root element
February 22, 2019
AAE 451, Aether Aerospace

9. Bending and twisting calculation with the rods
February 22, 2019
AAE 451, Aether Aerospace

10. Landing Gear Mount gear directly under wing
Wing attachment point
Force of gear will act at d=0.36 ft behind datum
30° angle in gear
February 22, 2019
AAE 451, Aether Aerospace

11. Landing Gear Longitudinal tip-over force 3.2 lb Lateral tip-over force
February 22, 2019
AAE 451, Aether Aerospace

12. Assumptions Maximum load factor: 10
Rectangular airfoil simplification for inertia calculations
Payload shape
Flaperon/ Ruddervator weight estimate
10 in. propeller
Weights for:
Servos
Battery
Motor
Receiver
February 22, 2019
AAE 451, Aether Aerospace

13. Questions?
February 22, 2019
AAE 451, Aether Aerospace

14. Backup Slides
February 22, 2019
AAE 451, Aether Aerospace

15. Explanation of Discretization
Elemental analysis
Divided airfoil into 8 sections
Analyzed each section as approx. rectangle to find inertias
Chord at midline of each element
February 22, 2019
AAE 451, Aether Aerospace