Troubleshooting bombsight errors
RESTRICTED
DEFECTS
AND MAL-
FUNCTIONS
(cont'd)
5. Adjustments
-adjust and clean. increase
clutch tension.
G.
30mb
impact is consistently in error.
-elescope is not properly aligned.
EaTaigh: gyro precesses off because of im-
proper
balance.
Dovetail not aligned.
Stabilizer gyro unbalanced.
Stabilizer not aligned.
Release points not aligned.
• Quadrants not aligned.
8. Bombsight cardan out
of balance.
9. Adjustments - send to shop for balancing if
necessary and calibration.
H. Difficulty in
Synchronizing
transverse cross
hair on target.
1. Transverse hair misaligned relative to pos-
ition of telescope quadrant.
a. Gyro precession excessive, caused by
gyro not being properly balanced; ex-
cessive bearing drag; excessive pendu-
lousness;
excessive flex. lead drag.
b.
Failure to erect transverse hair prop-
erly.
1)
Gyro
not
in vertical when trans-
verse
was erected.
2) Mirror not level when
transverse
hair was erected.
3)
Faulty technique.
C.
Failure to maintain gyro in vertical
when bombing.
1)
Bubbles
are off--need re-shimming,
2) Faulty technique of bombardier.
c.
Dirt on sheave or kinked cable.
2.
Erratic disc speed.
a.
Is impossible to synchronize.
3.
Roller
slippage.
a.
Is impossible to synchronize.
4. Adjustments check gyro balance, vertical of
optics, disc speed, roller slippage.
1.
Difficulty
in Synchronizing Fore and
Aft Hair
on Target
I. Stabilizer misaligned in plane.
• Reticle out of alignment.
3. Rapid
plane.
precession of gyro in transverse
Gyro not balanced properly.
Bearings not functioning properiy.
4.
AFCES
not functioning properly about verti-
axis in transverse plane.
2.
5.
6,
nair
a.
b.
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