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Page Title:
Section 2. DESCRIPTION AND DATA |
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 TM 9-1220-220-34
Section 2. DESCRIPTION AND DATA
1-3.
DESCRIPTION
a sighting system. The drive lowers the lines-of-sight of the range finder and periscope according to the superelevation
data, which is fed to the drive by the computer output shaft. It makes the linkage to the range finder and the coupling to
the gunner's periscope turn. This lowers the lines-of-sight of the range rinder and periscope the right number of mils of
superelevation. To again sight the target, the gun must be raised an amount equal to the superelevation angle. The drive
link assembly is a solid mechanical linkage that keeps the optical line-of-sight of the range finder and periscope
synchronized with line-of-sight through the axis of the gun bore. The drive is belted to pads on the turret roof. The junction
box assembly is attached to a bracket near the periscope mount. The drive has a trunnion link for connecting to the gun
trunnion, a range finder connector assembly for connecting to the range finder, and a temperature compensating rod with
a rod mounting bracket which bolts to a pad inside the turret wall. The drive also has a superelevation box assembly and
level vial.
1-4.
TABULATED DATA
Data
M10
M10A1
M10A3
M10A4
M10A5
M10A6
Length
55
55
39
55
55
55
(inches)
Width
45
45
25
45
45
45
(inches)
Height
30
31
14
31
31
31
(inches)
Weight
155
155
140
147
147
155
(pounds)
Para 1-3 Vol II
1-2
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