Structures and Weights 1 QDR Aether Aerospace Angry

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Structures and Weights 1 QDR Aether Aerospace “Angry Mosquito” AAE 451 Team 3 September

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

Weight and Balance 31 December 2021 AAE 451, Aether Aerospace 2

Weight and Balance 31 December 2021 AAE 451, Aether Aerospace 2

Wing Structure n EPP n spars 31 December 2021 Solid Expanded Polypropylene (EPP) foam

Wing Structure n EPP n spars 31 December 2021 Solid Expanded Polypropylene (EPP) foam wing Carbon fiber composite spars through EPP ¡ n No stringers, no ribs Fiberglass/epoxy structural skin? AAE 451, Aether Aerospace 3

Material Properties n Carbon/Epoxy AS 4 ¡ ¡ ¡ Young’s Modulus: n E=135 GPa

Material Properties n Carbon/Epoxy AS 4 ¡ ¡ ¡ Young’s Modulus: n E=135 GPa Density: n ρ=99. 57 lb/ft^3 Shear Modulus: n G=7 GPa 31 December 2021 n EPP ¡ AAE 451, Aether Aerospace ρ=1. 3 lb/ft^3 4

Wing Loading n n n 0. 45 taper ratio to approximate elliptic loading Maximum

Wing Loading n n n 0. 45 taper ratio to approximate elliptic loading Maximum bending load at root chord Maximum torsion load at tip chord 31 December 2021 AAE 451, Aether Aerospace 5

Torsion Loading for foam only n Using , found T by n Used T

Torsion Loading for foam only n Using , found T by n Used T to find the elemental angle of twist, n Added elemental twist to find total twist MH 24 airfoil XFOIL data 31 December 2021 AAE 451, Aether Aerospace 6

Bending Loads for foam only 31 December 2021 AAE 451, Aether Aerospace 7

Bending Loads for foam only 31 December 2021 AAE 451, Aether Aerospace 7

Bending Loads for foam only n n Final deflexion: 0. 56 ft Maximum bending

Bending Loads for foam only n n Final deflexion: 0. 56 ft Maximum bending deflexion does not occur on either tip or root element 31 December 2021 AAE 451, Aether Aerospace 8

Bending and twisting calculation with the rods 31 December 2021 AAE 451, Aether Aerospace

Bending and twisting calculation with the rods 31 December 2021 AAE 451, Aether Aerospace 9

Landing Gear n Mount gear directly under wing ¡ n Wing attachment point Force

Landing Gear n Mount gear directly under wing ¡ n Wing attachment point Force of gear will act at d=0. 36 ft behind datum ¡ 30° angle in gear 31 December 2021 AAE 451, Aether Aerospace 10

Landing Gear n n Longitudinal tip-over force ¡ 3. 2 lb Lateral tip-over force

Landing Gear n n Longitudinal tip-over force ¡ 3. 2 lb Lateral tip-over force ¡ 1. 1 lb 31 December 2021 AAE 451, Aether Aerospace 11

Assumptions n n Maximum load factor: 10 Rectangular airfoil simplification for inertia calculations n

Assumptions n n Maximum load factor: 10 Rectangular airfoil simplification for inertia calculations n n Payload shape Flaperon/ Ruddervator weight estimate 10 in. propeller Weights for: ¡ ¡ 31 December 2021 AAE 451, Aether Aerospace Servos Battery Motor Receiver 12

Questions? 31 December 2021 AAE 451, Aether Aerospace 13

Questions? 31 December 2021 AAE 451, Aether Aerospace 13

Backup Slides 31 December 2021 AAE 451, Aether Aerospace 14

Backup Slides 31 December 2021 AAE 451, Aether Aerospace 14

Explanation of Discretization n Elemental analysis ¡ ¡ ¡ 31 December 2021 AAE 451,

Explanation of Discretization n Elemental analysis ¡ ¡ ¡ 31 December 2021 AAE 451, Aether Aerospace Divided airfoil into 8 sections Analyzed each section as approx. rectangle to find inertias Chord at midline of each element 15

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