1. Structures and Weights Preliminary Design Review
Phoenix Aerospace – Structures Team
Jamie Allen
Andy Wiratama
11/18/2018
Phoenix Aerospace
AAE 451 – Fall 2001

2. Objectives Material Properties V-n Diagram Wing Loading Analysis
Weight Breakdown
CG Locations
Wing Layout
Analysis and Testing
Landing Gear
11/18/2018
Phoenix Aerospace
AAE 451 – Fall 2001

3. Material Properties
*note properties are approximate values for average materials, and most are not true constants
11/18/2018
Phoenix Aerospace
AAE 451 – Fall 2001

4. V-n Diagram
11/18/2018
Phoenix Aerospace
AAE 451 – Fall 2001

5. Wing Loading Analysis MATLAB Code is used to determine:
Wing loading using Schrenk’s approximation (Raymer)
Trapezoidal Approximation
Elliptical Approximation
Shear force
Moment
Centroids
11/18/2018
Phoenix Aerospace
AAE 451 – Fall 2001

6. Wing Loading Analysis Front Wing Loading Rear Wing Loading
11/18/2018
Phoenix Aerospace
AAE 451 – Fall 2001

7. Wing Loading Analysis Front Wing Shear Force Rear Wing Shear Force
Shear Force decreases as it moves away from the root to the tip
11/18/2018
Phoenix Aerospace
AAE 451 – Fall 2001

8. Wing Loading Analysis Front Wing Moment Rear Wing Moment
Moment about the longitudinal direction
Small wing load distribution at tip leads to small moment at the tip
11/18/2018
Phoenix Aerospace
AAE 451 – Fall 2001

9. Weight Breakdown
11/18/2018
Phoenix Aerospace
AAE 451 – Fall 2001

10. CG Locations X measured from nose to tail (roll axis) CG x=31.37 in.
y=0
z=3.32 in.
X measured from nose to tail (roll axis)
Y measured spanwise from center of fuselage (pitch axis)
Z measured vertically from bottom of fuselage (yaw axis)
Simplifying Assumptions:
Symmetric
Rectangular sections using root chord
Wings as flat plates
11/18/2018
Phoenix Aerospace
AAE 451 – Fall 2001

11. Wing Layout Shaped using foam
Rectangular spars (caps) located around quarter-chord
Spar towards trailing edge to support control surfaces
Monokote used to strengthen and smooth surface
Depending on testing, may add stringers or other strengtheners
11/18/2018
Phoenix Aerospace
AAE 451 – Fall 2001

12. Analysis and Testing Fuselage design
Wing layout (program for spar sizing)
Wing deflection calculations
ViSTA analysis
Construct scaled-down wing
Sandbag loading test
11/18/2018
Phoenix Aerospace
AAE 451 – Fall 2001

13. Landing Gear Taildragger configuration Buy pre-designed gear
Tip-over analysis
Sizing for gear (trade study)
*diagram from Raymer
11/18/2018
Phoenix Aerospace
AAE 451 – Fall 2001