曝光臺 注意防騙 網(wǎng)曝天貓店富美金盛家居專營店坑蒙拐騙欺詐消費者

in Fig. 3.lO.may bc used. Vafues of CNa given in Fig. 3.10 are based on maximum
frontal area of the body.
     The coefficients K WcB) and KBcW) arc given in Fig. 3.17 as functions of the ratio
of body diameter to wing span. Data presented in Fig. 3.17 apply for all Mach
numbers because they are based on slender body theory.
KW(B) i.o
 or
KB(W)
              a
STATIC STABfLfTY AND CONTROL
185
                                                                                      )   7   )     4  
┏━━┳━┳━━┳━┳━┳━┳━━┳━┳━┳━━━┳━┳━━━┳━━┳━┳━━━┳━┳━┳━┳━━┳━┓
┃    ┃  ┃    ┃  ┃  ┃  ┃    ┃  ┃  ┃      ┃  ┃      ┃    ┃  ┃      ┃  ┃  ┃  ┃    ┃  ┃
┣━━╋━╋━━╋━╋━╋━╋━━╋━╋━╋━━━╋━╋━━━╋━━╋━╋━━━╋━╋━╋━╋━━╋━┫
┃    ┃  ┃    ┃  ┃  ┃  ┃    ┃  ┃  ┃      ┃  ┃      ┃    ┃  ┃      ┃  ┃  ┃  ┃r   ┃/ ┃
┃    ┃  ┃    ┃  ┃  ┃  ┃    ┃  ┃  ┃      ┃  ┃      ┃    ┃  ┃      ┃  ┃  ┃  ┃  / ┃  ┃
┃    ┃  ┃    ┃  ┃  ┃  ┃    ┃  ┃  ┃      ┃  ┃      ┃    ┃  ┃-)    ┃/ ┃f ┃  ┃7   ┃  ┃
┣━━╋━╋━━╋━╋━╋━╋━━╋━╋━╋━━━╋━╋━━━╋━━╋━╋━━━╋━╋━╋━╋━━╋━┫
┃    ┃  ┃    ┃  ┃  ┃  ┃    ┃  ┃Kwr��  blj,naz
                  b
Fig.3.17   Lift ratios KBtW) and Kw{n) (Ref.1).
20
18
I.6
1.4
12
.6
.4
.2
 o
186           PERFORMANCE, STABILITY, DYNAMICS, AND CONTROL
    Data for KWcB) and KBcW) of Fig. 3.17 can be approximated by the following
expressions:
    KW,B,=0.1714(bb )2+0.8326(bb )+0.9974  (3.27)
    KB,W,=0.7810(bb )2+1.1976(bb )+0.0088  (3.28)
    S/ope of pitching-moment coefficient.   The slope of wing-body pitching-
moment coefficient is given by
                                    Cmcr.WB = (/:cg - Xac,WB)CLn.WB
where
                               Xc8 =.  8
                                  Xac. WB
Xtic.WB - ---
           c
(3.29)
(3.30)
(3.31)
where xcg .is the distance of the center of gravity from the leading edge of the
exposed wing root chord and x"c.}w~ is the distance of aerodynamic center of the
wing-body combination from the leading edge of the exposed wing root chord.
As said before, these disLances are considered positive aft.
   From Datcom,i '
 (-., )=(&rt)NC'y.N+(h.,t)W(B)Cler.W'B)+(_xw)B(W)CM,.B'W) (3.32)
       CLcr.W
where CLcy.(/W) iS given by Eq. (3.24) and
                             C,a.W,B, = CU,KW,B,(SS )                     (3.33)
　
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