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Comparison

Faster: The 1973

More Stable: The Flack

Sturdier: The 1973

Though the 1973 was a more complex design, it didn't necessarily fly better than the Flack.

The 1973: Modifications/Final Design

• Shortened distance between base of body and tail to 5 cm
• Reorganized batteries and electronics to the front
• Created a wooden structure under wings for support
• Percent of total surface area of in front of center of gravity: 18.08%

Data

Plane Building and Designing

The Final 1973

The Flack

Distance from nose to tail: 64cm

Wingspan: 122.5cm

Surface area: 4683.125cm^2

Surface area of elevons: 642.4cm^2

Surface area of stabilizers: 604.8cm^2

Total mass: 925.4g

Distance from nose to tail: 58.5cm

Wingspan: 106.6cm

Surface area: 3258.2cm^2

Surface area of elevons: 586.3cm^2

Surface area of stabilizers: 410.06cm^2

Total mass: 454g

Percent of total surface area in front of center of gravity: 19.29%

Xinyun and Max

The 1973: Initial Design

The Flack: Design

• Triangular foam body
• 1 propeller
• 2 back elevons
• 2 stabilizers

• Two propellers
• Stabilizers on tail
• Distance from base of plane body to tail: 27 cm
• Percent of total surface area of in front of center of gravity: 28.48%

Problems:

- Center of gravity too far from nose of plane

- Tail stuck too far out and dragged plane downward

- Little wing support