Technical solution of the bombing problem
RESTRICTED
2. Technical
portional to ground speed.
And if the optics are
speed proportional to ground
the rate quadrant is positioned at the tangent
function of the dropping angle.
When the indices of the quadrants coincide,
the bomb is released
provided the release
points
closed.
It must be remembered that the telescope
quadrant is positioned at maximum sighting angle
at the start of
the bombing run and that the rate
quadrant is positioned at
zero.
The rate quadrant
can
only be moved manually.
The telescope quad-
rant is driven, the driving power being furnished
Coredate goog anger
The drive is transmitted
from the motor to the disc, to roller,
inrough
in-
termediate dears and differentia to the telescope
rack, which translates the telescope quadrant.
Fig. 40 shows the train of action which takes
place in the
rate
end as the sight solves
the
bombing problem.
NOTE: The two intermediate gears between the rate
gear and rate pinion were added so that the draw-
Actual time of fall is set into the
sight by
positioning the altitude knob. The disc speed
varles inveresly as the altitude.
This is shown
by the altitude vector. As the altitude knob is
rotated clockwise the speed of the disc increases
and the altitude decreases.
When the trail arm
is rotated, the roller is
raised from the center of the disc
portional to trail, represented by af'istance pro-
rate knob is rotated clockwise, the roller is dis-
placed farther from the center of the disc. At the
point of synchronization,
the roller has been dis_
placed from the disc
al to whole range, Alcepter a distance proportion-
• The roller was displac-
ed by the
rate mechanism a distance proportional
to
actual range BIC'
when
the point of synchronization
is deter-
mined
the roller is driving
the telescope quadrant
at an angular speed proportional to ground speed
through
intermediate gears,
traction
gears,
tee head shaft and telescope rack pinion and tele-
scope rack.
The drive is transmitted to the mirr-
or (or telescope in the M-3) by means of a bronze
cable. The cable operating sheave gear is meshed
109