P09123: MAV 1 & 3
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Select Product Concept(s)

Table of Contents

The following section details the final concepts selected by the team from the list of generated concepts. The rationale used in selecting each of these concepts is also included.

Plane Layout

Selection: Rectangular Wings

Rationale: Stable platform. Easy to analyze and design. No need for tapered or sweep back due to low speed of aircraft. Ornithopter out of the scope of customer needs.

Wing Location

Selection: Top mounted wing

Rationale: The high mounted wing creates a keel effect for the plane. This basically means that the low slung weight of the aircraft will automatically stabilize itself if perturbed in the lateral direction.

http://www.free-online-private-pilot-ground-school.com/images/dihedral_stability.gif

Keel Effect Diagram

Propulsion

Selection: Electric Motor

Rationale: To reduce weight. Gasoline is heavy and, as it was used up, would change the center of mass. Also servos and receiver can be run off same battery as motor.

Fuselage Material

Selection: Carbon/Kevlar Sock Weave

Rationale: Strength and weight considerations. Also wanted to protect the internal components from impacts, therefor a strong material was needed. Much lighter than foam coated with fiberglass.

Fuselage Shape

Selection: Tapered/Teardrop

Rationale: Most aerodynamic shape. Will lead to the most efficient flight with the least amount of drag.

Wing Material

Selection: Carbon Fiber with Carbon Fiber Ribs

Rationale: The four layer multi-angle ply allows for stress reduction in each direction needed, while the ribs prevent compression under air pressure and vibration during flight.

Sensor Packaging

Selection:

Rationale:

Step 1. Prepare the Selection Matrix

Step 2. Rate the Concepts

Step 3. Rank the Concepts

Step 4. Combine and Improve the Concepts

Step 5. Select One or More Concepts

Step 6. Reflect on the Results and the Process

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