曝光台 注意防骗
网曝天猫店富美金盛家居专营店坑蒙拐骗欺诈消费者
speeds within the permissible speed range (Vmm < V < Vmax, see Chapter 2 for
more information). At each selected speed, the pilot deflects the elevator for pitch
trim and rolls the trim tab for stick-force trim (zero stick force). This experiment
is repeated for various locations of the center of gravity, which is usually accom-
plished by carefully moving a ballast weight in alimited range, Test data are then
plotted and extrapolated to obtain the locations of stick-fixed'and stick-free neutral
points as shown in Fig. 3.54.
3.3.79 Stick Force in Steady Level Flight
The elevator is connected to the pilot's control stick through some kind of a
linkage as shown schematically in Fig. 3.55. The force applied by the pilot on
the stick (control column) to'~eflect the elevator is known as stick force. The
magnitude of the stick force depends on the floating characteristics of the elevator,
hence on the hinge-momcnt coefficients. The pilot needs to deflect the elevator by
the amount 8e.R - 8e. f , wluch is related to the level of stick~free stability. In th~
following, we will derive the expressions for stick force and stick forcc'~radient
in level flight and show that these two quantities depend directly on the level of
stick-free stability.
+
+
m
STATIC STABILITY AND CONTROL
, . .
┏━━┳━━━━━━┳━┳━━━━━━━━━━━━━━┓
┃ ┃. ┃. ┃t ┃
┃ ┃. ┃. ┃. ┃
┃ ┃, ┃t ┃. ┃
┃ ┃, ┃( ┃t ┃
┃ ┃, ┃. ┃t t, ┃
┃ ┃. ┃. ┃ ┃
┃ ┃flcgl xcg2_ ┃f ┃ ┃
┃e. ┃ ┃. ┃ ┃
┃ ┃ ┃( ┃ ┃
┗━━┻━━━━━━┻━┻━━━━━━━━━━━━━━┛
┏━━━━━┓
┃ . ┃
┃~ ┃
┃~~\:9-2! ┃
┣━━━━━┫
┃ ┃
┗━━━━━┛
Z
CL
3
┏━━━━━━━━━━━━━┓
┃ C ┃
┣━━━━━━━━━━━━━┫
┃ ┃
┗━━━━━━━━━━━━━┛
+
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：
动力机械和机身手册1(186)
