Dovetail alignment
RESTRICTED
B. Eccent-
ric Stud
Not At
Exact
Center of
the Sight
Ster
With Trail
Arm At Zero
Mils.
C. Misalign-
ment of
Sta-
bilizer.
mechanism,
, there will be a tilt in the optics if
the dovetail is misaligned.
That is,
the eccen-
tric
stud
will not move
fore
and aft
to either side of this axis and consequently to
that
either side and
eithere de or on is seat
rearward parallel to the
axis of the stabilizer; it will move
extent it will carry
the C.T. carriage
to
thereby tilt the optics.
*hen the trail arm is rotated, the eccentric
disc. and with it the eccentric stue,
are displac-
ed rearward.
If the trail chart
for the giver
bombing problem
calls for 50 mils trail, the ec-
centric disc, after the trail arm has been set at
50 mils on the trail plate, should rest to the
rear of center of the sight
stem the exact dis-
tance for 50 mils. if the eccentric stud did not
rest
at exact center of the sight stem when the
tral
at 0 mils, then when the trail arm
is positioned to 50 mils the eccentric stud will
not rest the distance
to the rear of the sight
stem that corresponds
to 50 mils.
If the eccentric stud rested to the rear of
the center of the sight stem
when the trail arm
rasat 0 mils, excessive trail will result in the
cross trail mechanism.
Excessive trail in the cross trail mechanism
WALls Cross Tran
cross trait mechanism
give a downwing error.
Tie 44Le
stabilizer is misaligned when its
aft axis
is not parallel
to the fore and aft
axis of the plane.
A
of
the
dovetail
Gauses
and
a
counter
wise
misalignment
causes
bombing
error.
arm
The
fore
and
207