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|  MIL-E-7104D(WEP)
3.2.2
Cyclic Rate - A separate release pulse of 0.020 second minimum duration shall
be required to eject each round and the equipment shall prepare itself automatically for the firing of
the next round within 10 seconds.
3.3.
Power Requirements
3.3.1
Electrical Power - The equipment shall meet all applicable requirements of
MIL-STD-704 and shall give specified performance from a 28-V DC, Category "B", power sources
with characteristics as defined in MIL-STD-704. The power required shall not exceed 3 amperes.
Pneumatic - The equipment shall meet all applicable requirements of Specifica-
3.3.2
tions MIL-P-8564 and MIL-P-5518 and shall give specified performance from 3000 psi sources in
accordance with Specification MIL-P-5518.
* 3.4
Reliability - The equipment shall be capable of the operational stability, mean-
time-between- failures, and total operating life specified herein. Equiprnent reliabilit y shallbe
analyzed, calculated, and reported in accordance with MIL-STD-756.
Operational Stability - Each unit of the equipment (see 1. 2) shall operate with
* 3.4.1
optimum performancer 100 hours, continuously or intermittently, without the necessity for read-
justment of any parts which are inaccessible during flight. The equipment shall be capable of
launching 250 rounds during this service life.
* 3.4.2
Total Operating Life - Each unit of the equipment (see 1.2) shall have a minimum
total operating life of 2000-hours with reasonable servicing and replacement within this interval and
the life of such parts shall be specified by the manufacturer. The equipment shall be capable of
launching 5000 rounds during the total operating life. Each part shall have a life of at least 1000
launchings.
* 3.4.3
Mean-time-between-failures - Each unit of the equipment (see 1.2) shall have a
mean-time-between-failures of at least 200 hours and shall be capable of launching at least 500
rounds between failures.
Equipment Duty Cycle - The equipment duty cycle shall be 8 hours time-on and
* 3.4.4
16 hours time-off. During the time-on 20 romds shall be launched. The muzzle velocity control
setting shall be changed for each launch. Performance characteristics (3.2) shall be measured for
each launch and the muzzle velocity shall not vary more than 3% from the control setting on the
remote control which shall be used for all launches. The percentage of rounds launched at each
velocity shall be approximately as follows:
Percentage of Rounds Launched
Muzzle Velocity
0.4
90
0.8
100
1.2
110
2.2
120
3.4
130
5.4
140
7.8
150
10.6
160
13.6
170
16.2
180
18.6
190
19.8
200
3
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