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There are also dynamic considerations. The vehicle should have an overall low pitch-roll couple to avoid 'coning' failures. The natural frequency all structural members should either be well damped or far from any frequencies excited in flight.
Stability
Main Article: Stability
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Flow turning
Structural
Main Article: Fin Mechanical Design
The team does not currently possess nuanced analytic methods for fin can design. The included method is a conservative first estimate.
References:
Black Brant III Fin Design Paper - Internal Use Only
Minimizing Pitch-Roll Coupling - Internal Use Only