While you read this section, refer to figure
8-24. As the aircraft accelerates in the sensitive
vertical direction, the suspended armature tends
to remain behind due to its inertia. This reaction
up by the E pickoff windings and armature (view
B). The armature completes the magnetic circuit
through a small air gap. The relative motion
between the armature and E pickoff varies the
This variation results in a signal that is
output voltage is either in phase or 180 degrees
out of phase with the excitation, depending on
the direction of acceleration.
COORDINATION INPUT. --In some air-
craft, a dynamic vertical sensor detects lateral
sensor supplies a signal to position the rudder to
correct the slip or skid, coordinating the turn.
The signal is proportional to the amount of the
aircraft deviation from the vertical axis of the
aircraft. In other aircraft, a horizontally mounted
aircraft provides the same information. Only
the dynamic vertical sensor is covered in this
The dynamic vertical sensor consists of a
viscous-damped pendulum mechanically con-
the mechanism assembly, which includes a
assembly attached to the rotor. The vane moves
in an oil-filled chamber. The damping effect of
Figure 8-24.-Accelerometer transmitter.
Figure 8-25.-Cutaway view of a dynamic vertical sensor.