“lESLWNGMETER
Slaving
Meter
KA 51A
lntemally Lighted
1
Clockwise
Slave and
Free
Adjustment Gyro Switch
’
KA51B
Slaving Meter
/A
\
MAN
CW
1
Counterclockwise
Adjustment
Slaving Meter-This meter indicates
any difference between the displayed heading
and the magnetic heading. Right or updeflec-
tion indicates a clockwise error of the com-
pass card. Left or down deflection indicates a
counterclockwise error of the compass card.
Whenever the aircraft is in a turn and the card
rotates, it is normal for this meter
to
showa full
deflection
to
one side or the other.
NOTE: During level flight it is normal for
the meter needle
to
continuously move from
side
to
side and
to
be fully deflected during a
turn.
If
the needle stays fully deflected, left or
right, during level flight, the free gyro mode
can be used
to
center it. as described below.
Slaveand FreeGyroSwitch(KA51A)-
When depressed, the system is in the slaved
gyro mode. When the button is in the outer
position (not engaged) the system is in the
free gyro mode.
(KA
51B)-Operation is iden-
tical except switch is pulled and moved
to
the
appropriate position.
(actual size)
\
Clockwise/
counterclockwise
7
Adjustments
Clockwise Adjustment (KA 51A)-
When the system is in the free gyro mode,
depressing the clockwise manual heading
drive button will rotate the compass card
to
the right
to
eliminate left compass card error
(KA 51 B)-Operation is identical except
switch is held to clockwise position.
Counterclockwise Adjustment
(KA
51A)
When the system is in
the
free gyro mode,
depressing the counterclockwise manual
heading drive button will rotate the compass
card
to
the left
to
eliminate right compass
card error.
(KA
518)-Operation is identical
except switch is held
to
counterclockwise
position.
The
KA
51
B Control and Compensator
Unit is a smaller slaving accessory which has
replaced the
KA
51A. The KA 51B can be
mounted either vertically or horizontally, and
provides all the slaving modes and capa-
bilities of the larger KA 51A.
7
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