/* simple model based on Hepperle's equation
* exponent dtdvvt was computed in uiuc_menu.cpp */
F_X_engine = Throttle[3] * t_v0 * (1 - pow((V_rel_wind/v_t0),dtdvvt));
/* simple model based on Hepperle's equation
* exponent dtdvvt was computed in uiuc_menu.cpp */
F_X_engine = Throttle[3] * t_v0 * (1 - pow((V_rel_wind/v_t0),dtdvvt));