 |
|||
|
Page Title:
Low temperature shock resistance test. |
|
||
| ||||||||||
|
|  MIL-S-45921A(AR)
4.6.6 Shock resistance endurance test. The stock assembly
shall be tested for the shock resistance endurance requirement
(see 3.2.8) using the test method specified in 4.6.3 except that
95 additional practice anti-tank grenades shall be fired for a
total of 100 grenades.
The stock
4.6.7 Low temperature shock resistance test.
assembly shall be tested for the low temperature shock
resistance requirement (see 3.2.9) using the test method specified
in 4.6.3 except that the rifle shall be conditioned for 3 hours
0
0
0
o
at minus 65 +/- 5 Fahrenheit (F) and tested at minus 65 +/- 5 F.
4.6.8 Low temperature abuse test. The stock assembly,
assembled as a component of othe M14 rifle, shall be conditioned
0
for 3 hours at minus 65 +/- 5 F and tested at minus 65 +/- 5F for
the low temperature abuse requirement (see 3.2.10) using the
following sequence:
The rifle shall be dropped from a height of 3 feet
(from point to be impacted to hardwood bench) onto a hardwood
bench, so that the left side, right side, the toe, and the heel of
the stock assembly each strike the bench on individual drops. The
stock shall be inspected after each drop.
b. The rifle shall be held by the muzzle in a horizontal
position, allowed to pivot of its own weight about muzzle and
through a full 90 degrees, so that the bottom, top, and each side
of the stock strikes the flat surface on the side of a hardwood
bench on individual drops. The stock shall be inspected after
each drop.
4.6.9 Heat
resistance
test.
Stock assemblies, assembled as
4.6.9.1 Preparation.
components of the M14 rifle shall be tested for the heat
resistance requirement (see 3.2.11) with the bolt, firing
mechanism, and operating rod spring removed for the rifle. A
stand shall be employed to hold a rifle in a horizontal position.
A high speed tabular heating rod (maximum temperature of 1,500F,
115 volt, 1,000 watt, effective heating length of 24 inches, and
modified as necessary for clearance and positioning of the
effective heating range in the barrel) shall be inserted in the
barrel so that the effective heating range is centered in the
barrel.
The heating rod shall be connected by leads to a variable
A pyrometer with chromelalumel thermocouple and
voltage control.
leads shall be employed to measure the temperature of the barrel.
The thermocouple shall be fastened by glass roving winding to the
top side of the barrel approximately 10.5 inches from the muzzle
end. An electric timer shall be used for all necessary timing.
15
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals