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<p>be calculated using <a href="page.php?w=computational_fluid_dynamics">computational fluid dynamics</a> or <a href="page.php?w=computer_simulation">computer simulation</a>. It is measured empirically by testing in a <a href="page.php?w=wind_tunnel">wind tunnel</a> or in free <a href="page.php?w=flight_test">flight test</a>.</p>

<p>The L/D ratio is affected by both the form drag of the body and by the induced drag associated with creating a lifting force. It depends principally on the lift and drag coefficients, <a href="page.php?w=angle_of_attack">angle of attack</a></p><p>
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