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┃  ┃~       ┃   -      ┃        ┃        ┃                                    ┃        ┃        ┃
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         0      -1      .2      .3      .4      .5
            cf/c
              b) Empirical correction for lift effecti,veness of plain trailing-edge flaps
Fig.337 Empiricalcorrectionfactorforlifteffecl:ivenessofplaintrailing^edgeflaps.l
212           PERFORMANCE, STABILITY, DYNAMICS, AND CONTROL
We observe that this term is exactly the same as that given in Eq. (3.63), which
should not be surprising because, during a disturbance in angle of attack, the
elevator is supposed to be held constant (stick-fixed).
  Using Eqs. (3.92) and (3.94), the elevator defiection for longitudinal trim
(Cm = 0) iS given by
8, =  C~.wxa + Cmac.w + Cm f - a,(aro - iw + it - e)Vi r7:            (3.100)
                                                at V i rltt
　
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