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

 delta wing has two attractors at 34.5 deg and -31 deg.32 The usual zero attractor
is not observed for the 60-deg delta wing at cy = 30 deg. The asymmetry in
numerical values of the attractors for the 60-deg delta wing is attributed to the
 slight asymmetry in the free-to-roll model as stated elsewhere.32 The variation of
STABILITY AND CONTROL PROBLEMS AT HIGH ANGLES OF ATTACK   711
a)
c)
b)
d)
Fig. 8.41a    Free-to-roll time histories of 60-deg dejta wing.32 (Courtesy ICAS.)
┏━━━━┳━┳━━━━┳━━━━━━━━━┓
┃\       ┃  ┃        ┃l- .r,~-t *.,t    ┃
┣━┳━━┫  ┃        ┣━━━┳━━┳━━┫
┃  ┃    ┃  ┃        ┃      ┃    ┃    ┃
┃  ┣━━╋━╋━━━━╋━━━╋━━╋━━┫
┃  ┃    ┃  ┃        ┃      ┃  - ┃    ┃
┃  ┣━━╋━╋━━━━╋━━━╋━━╋━━┫
┃  ┃    ┃  ┃        ┃r-_   ┃    ┃ -  ┃
┃~ ┃\-  ┃~ ┃7       ┃      ┃    ┃    ┃
┣━┻━━┻━╋━━━━╋━━━╋━━╋━━┫
┃            ┃:) ~(o  ┃1- 59 ┃    ┃    ┃
┗━━━━━━┻━━━━┻━━━┻━━┻━━┛
po     0..     02     t ,     0.4     0~     0,6
                                  tme. s
Fig. 8.41b    Free-to-roll time histories of 65-deg delta wing.33 (Courtesy AGARD.)
 50
 N
 30
-
.: 20
=
:
 10
   o
 N
-
: 20
=
-
~
   o
-20
712          PERFORMANCE, STABILITY, DYNAMICS, AND CONTROL
E
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃Unstabte                                                                                    ┃
┃       ing   .                                                                              ┃
┃                                                                                            ┃
┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┫
┃<S,ab,,o~       Cr ossing ,,,~                   ~-                                      d  ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
Fig. 8.42    Schematic variation of rolling moment of65-deg delta wing at 30-deg angle
　
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