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Page Title:
Thermal stability and discharge volume |
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|  MIL-E-526498
a.
Place nonmetallic parts of a sample in a 400 milliliter glass beaker
and immerse with diethyl ether conforming to MIL-E-199. Cover with a
watchglass and place in a ventilated space maintained at 73 2.5F
for 14 days.
Remove parts from ether and allow to air-dry for 1 hour.
b.
c.
Reassemble the primer equipment sample and proceed with the endurance
test.
Any swelling, hardening, or softening rendering a nonmetal lic part as unfit
for the endurance test (see 4.5.2.2), shall constitute failure of this test.
4.5.2.2 Endurance. Cold soak the primer equipment at a temperature of not
higher than -65 F for a minimum of 4 hours. Using primer fuel conforming to
O-F-1044, subject the cold soaked primer equipment to 1,000 cycles of
simulated use at an ambient temperature not higher than -65 F.
Nonconformance to 3.4, binding of components, breakage, or inability to
complete the test shall constitute failure of this test.
4.5.2.3 Thermal stability and discharge volume. Establish the discharge
volume for the type and size of primer equipment to be tested as follows:
a.
Weigh cylinder and complete primer device.
b.
Discharge 10 shots (pausing 6 seconds after pulling lever to allow
chamber to fill and 6 seconds to allow it to empty).
Reweigh cylinder and primer device, The difference in weight is the
c.
total discharge of primer (or primer and propellant) as appropriate.
d.
Taking the average weight of the 10 shots, convert to primer volume as
follows:
Primer Volume =
(Average shot weight) (91.3%)
Specify gravity ether at discharge temperature
Average shot weight = From (c) above.
91.3% = Empirically arrived at percent of ether in total discharge.
Specific gravity ether = Supplied from data published by ether upplier.
Any breakage, leaking, sticking, or binding of components, or a deviation in
the specified discharge of volume of primer fuel as specified in 3.5 shall
constitute failure of this test.
4.6
spec tion of packaging.
4.6.1
Quality conformance inspection of pack.
4.6.1.1 Unit of product. For the purpose of inspection, a completed pack
prepared for shipment shall be considered a unit of product.
4.6.1.2 Sampling.
Sampling for examination shall be in accordance with
MIL-STD-105.
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