MIL-T-45379D(AT)
TABLE V. Gun laying on moving target and tracking accuracy.
Percent of time on target |
Traverse rate mils/sec (reference) |
Established lead mils |
Target size mils (Square) |
Target size centi- meters (Square) |
Target range meters |
Target velocity mph |
Length of course meters |
90 100 100 100 100 100 100 |
0.5 1.0 3.3 9.8 19.6 32.6 65.2 |
1.0 2.0 7.5 20.0 7.5 10.0 20.0 |
0.25 1.25 1.25 1.25 1.25 1.25 5.0 |
45.72 228.50 228.50 228.50 34.29 34.29 137.16 |
1828.8 1828.8 1828.8 1828.8 274.3 274.3 274.3 |
2.0 4.0 13.5 40.0 12.0 20.0 40.0 |
45.7 91.4 182.9 182.9 365.8 365.8 365.8 |
3.5.9.3.5 Operation on slopes. When the vehicle is canted or pitched on slopes up to and including 15° turret attitude, the gun control system shall be capable of gun laying on a 0.25 mil stationary target as specified in 3.5.9.3.3 and table IV, except the time limitation need not be met for manual operation. Turret chatter shall be allowed only when turret unbalance tends to cause turret rotation in the direction of manual traverse. The gun control system performance on level terrain shall not be affected in any manner as a result of vehicle operation on slopes. The combat load may be simulated (see 4.6.4.9.3.5).
3.5.9.3.6 Stability of operation, vehicle stationary.
3.5.9.3.6.1 Non-stabilized mode. With the vehicle in the non-stabilized mode and either level or on slopes not exceeding 15° turret attitude, and turret power activated or deactivated, the gun shall not move more than 0.5 mil in azimuth or elevation during a 1 hour period
(see 4.6.4.9.3.6.1 and 4.6.4.9.3.6.1.1).
3.5.9.3.6.2 Stabilized mode. With the vehicle in the stabilized mode, and drift controls properly adjusted, the gun shall not move more than 2 mils in azimuth or elevation during a
60 second period and the rate of drift shall not exceed 1 mil/second at any time during this period
(see 4.6.4.9.3.6.2).
3.5.9.3.7 Traverse and elevation limits. The angular 105mm gun movement and vehicle clearance shall be in accordance with the following requirements (see 4.6.4.9.3.7).
a. At positive elevations down to 0°, the gun shall be capable of being traversed for
360° by power and manual controls with the elevation and traverse power switch ON. The traverse shall be accomplished without vehicle interference.
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