OP-755 Part 2 Pages 197-401 - Personal Page of GENE SLOVER

354
train, to indicate that the turret is trained to this angle,
to transmit corrected train angle, and to supply the necessary
correction to turret train to give the correct train angle.
Indicated also is the actual turret train with parallax subtracted.
The parallax mechanism receives a function of range
from a transmitter in the plotting room computer. This function
of range (inverse range) is received by a synchro with a
dial mounted on the rotor shaft. The dial is graduated in
range from 3400 yards to 50,000 yards with a mark for .infinity
range. Although the dial is not graduated below 3400 yards,
the scale is such that operation from 2102 yards to infinity
yards results in one complete revolution of the dial. This
function of range is set into the parallax mechanism by hand,
matching the dial described above. Provision is made for reading
the base length setting through a window without removal
of the cover. It is provided with a stub shaft fOT transmi tting
to the train receiver regula tor the value of the function
of range. The 6-G synchro transmitters transmit, at 1 and 36
speed, ~alues of turret train with turret parallax subtracted
for use .in the mu.l.t.Lp.Le turret train indicators and in case
of turret 2 for use in transmitting turret train order in
auxiliary control.
MVLTIPLETURRE TRAININDICATOR,MARK12, MODS.5 AND6
49. The Multiple Turret Train Indicators, Markl2, Mod~
5 in officer I s booths of turrets one and two and Mark12, Mod.
6 in the officer's booth of turret three, function to indica te
. as a direct reader and as a zero reader that the turret has
been trained in accordance with orders received. The direct
reader dial indicates the train of the mount at one speed and
is attached to an indicating synchro. The zero reader dial
at 36 speed is attached to indicating synchros and when pointing
to zero (vertical position) indicates that the turret is
trained on the same target as the controlling director.
BATTLEORDERINDICATOR,MARK28
50. The Battle Order Indicators, Mark 28 are lo·cated
one in each turret booth and function to indicate the range,
deflection and battle orders transmitted by the battle order
transmi tter in the plotting room computer. Range is indicated
by increments of 50 yards from zero to 39950 yards by means of
two motors; one high speed synchro, 1 rev. = 1000 yards and a
low speed synchro, 1 rev. = 4,000 yards. Deflection in increments
of one mil from 325 to 600 mils is indicated by means
of two motors; one high speed synchro, 1 rev. = 20 mils and a
low speed synchro, 1 rev. = 300 mils. Indicated also are the
f'o.l Lovi.ng battle orders: commence firing- as "Fire", cease
firing as "Cease," director fire automatic as "Auto", director
fire indicating as II Lnd", local control as "Loca L;" circuit
broken as "Circ Brok. 1I