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

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

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

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

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

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

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

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

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

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

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

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

Questions? February 22, 2019 AAE 451, Aether Aerospace

Backup Slides February 22, 2019 AAE 451, Aether Aerospace

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