MIL-T-62222(AT)
3.5.3.6.4.2 Azimuth indicator backlash. The backlash of the azimuth indicator shall not exceed 1.0 mil at any position of the turret (see 4.6.17.3.6.4.2).
3.5.3.6.4.3 Leveling devices. The levels on the rangefinder and ballistic drive shall be level within 15 minutes (three graduations) when the gun is at the boresight position and the ballistic drive superelevation input shaft is at the position specified on the ballistic drive input shaft qualification plate (see 4.6.17.3.6.4.3).
TABLE VIII. Superelevation (mils).
Ammunition |
Cam |
Meters 500 |
Meters 1000 |
Meters 1200 |
Meters 2000 |
Meters 3000 |
Meters 3600 |
Meters 4000 |
APDS-T, M392 HEP-T, M393 HEAT-T, M456 APERS-T, M494 |
D8619776 D8620062 D8620987 B11727369 |
1.14 6.68 1.97 9.4 |
2.37 13.18 4.34 12.7 |
2.88 16.20 5.42 14.1 |
5.00 31.41 10.77 19.9 |
7.84 59.29 21.22 30.2 |
9.71 81.83 31.06 37.8 |
11.08 . . . 40.11 43.6 |
TABLE IX. Superelevation tolerances.
Mil output |
Tolerance plus or minus |
0 to 6 6 to 11 11 to 26 26 to 31 31 to 36 36 to 41 41 to 61 61 to 86 86 to 98.5 |
0.25 0.30 0.35 0.40 0.50 0.60 0.70 0.80 0.90 |
3.6 Fire extinguisher. The fixed fire extinguisher system, when installed in accordance with applicable drawings shall be readily accessible for operation internally and externally. Actuating the internal controls shall simultaneously stop the supply of fuel to the engine. The effort required to discharge the system either internally or externally, shall be not more than 55 lb. A
time delay of more than six seconds but less than 11 seconds shall occur on the first shot between
actuating of the release mechanism and entrance of carbon dioxide (C02) into the engine compartment (see 4.7).
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