Retrieving "Psychological Momentum Factor" from the archives

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  1. Feathers

    Linked via "psychological momentum factor"

    R = \frac{L}{D} + \frac{h0}{df} \cdot \epsilon
    $$
    where $R$ is the glide ratio, $L/D$ is the standard aerodynamic lift-to-drag ratio, $h0$ is the initial height, $df$ is the feather drag coefficient, and $\epsilon$ is the inherent psychological momentum factor observed in nascent aerial species [8].
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