Wind error causes
RESTRICTED
POINTS TO
BE REMEM-
BERED
4. Stabilizer misaligned clockwise.
Gyro not properly balanced causing a rapid
rate of precession of bottom of gyro toward
E. Constant upwind or constant downwind errors.
1.
Former caused by pre-set trail in the C.T.
mechanism-or by too much trail set in C.T.
mechanism.
2.
Latter caused by sub-set trail in the C.T.
mechanism-or by too little trail set in C.T.
mechanism.
A. NEVER OIL BEARINGS EXCESSIVELY. FOLLOW IN-
STRUCTIONS.
B. DO NOT OIL GUDGEON BEARINGS UNLESS THEY ARE
CLEANED.
C. USE NO ABRASIVE ON A CLUTCH.
D. ALL INSPECTIONS WILL BE
PERFORMED WHEN DUE.
E. ISOLATE ALL ELECTRICAL DIFFICULTIES WITH A CON-
TINUITY TESTER.
USE A FILE VERY LIGHTLY TO REMOVE BURRS FROM
GEAR TEETH WHEN NOTHING ELSE IS AVAILAB.E.
G.
CHECK FOR
ELECTRICAL
SHORT
CIRCUITS
OF THE STABILIZED SECTOR.
H. ALL GYROS MUST BE STOPPED TO CLEAN THE COMMUT-
ATORS.
A. Sight.
Disconnect motor supply leads at gyro hous-
ing terminal block.
2.
3.
Remove terminal clip on level clamp.
with continuity tester, check between the
gyro housing
and the
ead of the circuit
being tested.
B. Stabilizer.
1.
Insert insulating material under the slip
ring brushes.
2.
With
continuity tester, check between the
cardan
flexible lead
termina! block and the
gyro housing. Move the gyro so the stabil-
ilizer brush will complete all circuits.
3.
Insert insulating material under the slip
ring brushes.
Disconnect
the field lead at the grounded
the servo motor.
Unscrew brush
holder plug and
remove the brush.
Turn servo
switch off.
5.
eft.
SIGHT
MOUNTED
ON
THE
STABILIZER,
RO-
TATE
SIGHT
(USING
COURSE
KNOBS)
FROM
TO
MAXIMUM
DRIFT
TO
INSURE
EVEN
WEAR
a
C.
i.
2.
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