MIL-V-62008 Vehicle, Combat Engineer, Full Tracked, 165 Mm Gun, M728This specification covers one type of full-tracked armored combat vehicle which mounts a 165MM gun as primary weapon.

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MIL-V-62008B(AT)

3.6.14.5  Boresight retentions.  The gunner periscope and telescope shall maintain previously established boresight within the values of table V.

Table V - Boresight retention.

3.6.14.6  Night vision.  Actuation of the night vision channel switch of the gunner periscope or the commander periscope shall remove the shutter from the optical path and shall provide low light level operation viewing and sighting through the night vision channel.  Image brightness shall be maximum with the tube control knob in the extreme clockwise position.  The reticle shall not be illuminated with the reticle control knob in the "off" position, and it shall be of maximum brightness with the reticle control knob in the extreme clockwise position.

3.6.15  Cupola performance.

3.6.15.1  Slip ring contact boards.  The slip ring contact boards mounted in the turret shall be vertically adjusted so that the bottom edge of the lowest contact spring is in the same horizontal plane as the bottom edge of the lowest contact strip within plus or minus .010 inch.

3.6.15.2  Slip ring circuits.  When the completed cupola has been assembled to the turret, it shall include slip rings to provide uninterrupted continuity of communications, power, and ground circuits throughout continuous 360   of cupola traverse.  Each slip ring power circuit shall be capable of transferring between turret and cupola a minimum of 15 amperes of constant current.  Each slip ring communication circuit shall be capable of transferring a minimum of

10 amperes continuous current.

3.6.15.3  Slip ring noise.  The operation of slip ring shall not introduce static of any kind into the communications system.

3.6.15.4  Traverse effort.  Azimuth gear box starting torque, for right or left traverse, shall be not more than 30 inch-pounds to start motion from any position within 360   rotation.

3.6.15.5  Elevation effort.  With machine gun flexible feed chute, canvas cover and periscope linkage installed, the screwjack handle breakaway torque shall not exceed the following:

15   depression to 60   elevation,   25 in. lb.

60   elevation to 10   depression,   25 in. lb.

10   depression to 15   depression, 35 in. lb.

3.6.15.6  Elevation limits.  The cradle with machine gun sighting system and cradle cover installed shall have a minimum of 60   elevation and a minimum of 15   depression.

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