Free-body diagram of an airplane in flight.
PhysFliS Initial Conditions window. The constants a, b, c, and d that determine the behavior of the lift and drag coefficients are entered as they appear in Eqs. (5) and (6) . Except for angles (which must be measured in degrees), any consistent system of units can be used.
Main PhysFliS simulation window. This example trajectory is the result of the airplane's initial speed being below the cruising flight value but the thrust and wing pitch being set to their cruising flight values.
This simulation differs from that in Fig. 3 in that the lift coefficient is not constant. The plane still approaches cruising flight as a stable equilibrium point.
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