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|  MIL-G-85536(AS)
3.2.1.4 Burst firing schedule. The gun system shall be capable of fir-
ing any number of bursts of any length including a single burst fire-out
without degrading performance. Unless otherwise specified herin, the gun
system normal burst firing schedule shall consist of continuous bursts of at
least on second, with five minutes of static ambient cooling between burst
cycles until all the ammunition is fired.
3.2.1.5 Gun system signals. The gun system shall provide a rounds
remaining signal and a gun unclear signal to appropriate cockpit indicators:
a.
Rounds count. A 22.0 to 29.0 Vdc, 500 mA maximum, 7 ms + 1 ms pulse
shall be provided for each round fired. The rounds remaining signal
shall be accurate to + 20 rounds per complement when fired in
accordance with the schedule specified in 3.2.1.4.
b.
Gun not clear. A 22.0 to 29.0 Vdc, 500 mA maximum signal shall be
provided when the gun is not clear.
3.2.1.6 Torque.
3.2.1.6.1 Breakaway torque. The gun system breakaway torque (less
ammunition) shall be not greater than 85 inch-pounds.
3.2.1.6.2 Running torque. The average system running torque shall be
not greater than the limits specified in Figure 1.
3.2.2 Weight. The gun system weight in the configuration defined by
Drawing 1395AS100, less ammunition, shall be not greater than the weights
specified in Table II.
TABLE II. Gun system weight.
Component
Weight
Drawing
Gun System (less ammunition)
950.0
1395AS1OO
25-mm Gun Pak Structure Assembly
188.0
75A732506
25-mm Ammo Pak Structure Assembly
117.0
75A732707
3.2.3 Reliability. When installed on the ground firing test stand, the
gun system shall have a minimum reliability, at a confidence level of 90
percent, of 0.98 probability of firing a one-second burst of ammunition at any
given firing sequence within the limitations specified herein without a
stoppage (see 6.3.5).
6
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