MIL-DTL-45500E
on a plane perpendicular to the centerline of the gun, and allow
freedom of movement in a longitudinal direction. Torsional
deflection of the mount shall not affect targeting and accuracy.
4.5.5.4 Power supply and control equipment. The power
supply and control equipment (see 6.2) shall be capable of
allowed maximum torque and capable of controlling the steady
state rate of fire within plus or minus one percent. In
addition, a braking device shall be provided to stop the gun
drive when power is removed. The drive used in the gun test
shall be calibrated with adjustable power input versus torque out
put to assure that cyclic rate requirements are met or a
calibrated torque transducer may be used to measure torque.
Drives or torque transducer shall be recalibrated prior to each
day's testing or as required. Instrumentation shall record the
readings necessary to establish that performance requirements are
met for each gun tested. Additional equipment shall be as
specified on the applicable specification sheet.
4.6
Methods of inspection.
4.6.1 Firing pin protrusion and continuity test. Guns
shall be tested using the inspection equipment in accordance with
Drawing F7273689 or Government approved test equipment. The
spring loaded plug shall be placed in the gun and fed into each
barrel by manually rotating the gun until the barrel containing
the plug is in the firing position with the breech bolt assembly
locked. The low test voltage shall then be applied across the
contact pin of the firing contact assembly and the gun housing.
The minimum firing pin protrusion requirements and electrical
continuity requirement has been met if electrical continuity is
indicated on the test equipment.
4.6.2 Headspace test. Guns shall be tested using the
inspection equipment specified on Drawing F7273689 or Government
approved test equipment. The spring loaded plug shall be placed
in the gun into each barrel by manually rotating the gun until
the barrel containing the plug is in the firing position with the
breech bolt assembly locked. The thickness gage shall then be
inserted through the housing assembly to check the distance
between the plug head and sleeve. The headspace is within the
requirements if the minimum thickness end of the gage enters and
the maximum thickness end of the gage does not enter between the
plug head and sleeve.
4.6.3 High-pressure resistance test. Guns shall be tested
by firing one high-pressure test cartridge in each barrel after
the guns have been given the clearing test as specified in
4.6.4.1. This proof firing shall be accomplished with the gun
held in a mount in accordance with 4.5.5.3. Barrels and bolts to
13
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business