Calibration inspection checklist
RESTRICTED
H. Telescope governor should fall when 15° out of
the vertical, with tension relieved.
1.
Telescope points arc across top at low speed.
Farther down, at high speed.
J. Telescope points
K. Altitude knob disc speed low--10l (plus or
i Rio are is contaction,
minus 1/2) to 246 (plus or minus 1/2). High: 246
to 593.
L. Slip ring brushes
should
make 100%
contact.
M. Running temperature of sight gyro is 140°F.
N. Run sight gyro 10 minutes after oiling; then
clean commutator, brushes and brush tubes.
0.
Flexible leads
should be "S" shaped from car-
dan to gyro when 3
flexible leads are used; and
heart shaped when 2 are used.
Never run roller on center of disc unnecess-
arily.
Q. Never use abrasives on roller.
R. Do not
compressed
air on bearings.
S.
Use crocus cloth parallel to sectors to clean
isolated sector.
No continuity between sector of isolated sec-
Isolated
sector brush
must make 100% contact.
V. A pendulous
gyro has
axis of suspension
above its center of gravity.
W. Too much pendulousness causes wear on parts
and undesirable turns.
P.D.l. brush should
ection.
move 5 1/2° in each dir-
P.D.l. brush clearance is
• 008"
Z. Slippage of bombsight clutch is 18 to 24
pounds.
Aa.
Slippage of auto pilot clutch is 10 to 12
pounds.
Drift pointer clearance. is
Ae. Vertical clearance of sight stem with
pin in
is ,003" to .007"
Af.
End play of
turn knob is • 003"
• 004".
Ag. Pigtails must not ground
case.
Ah. Nut gear clearance is two teeth
or . 006" or
10 mils.
make
30%
P.
T.
tor.
U.
its
X.
Ab.
Slippage
of
drift
clutch
is
to
pounds,
Ac.
Slippage
of
pounds.
(min.)
Ad.
to
228