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Test procedure for rail shipment. |
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|  MIL-M-13081F
method of test is to lift the mixer as in a. above and add weights
to the main frame until the required force is obtained. Hold the
mixer under either of the above loading conditions for at least 90
seconds. Weld failure or permanent deformation caused by lifting
or failure to meet the requirements of MIL-STD-209, shall constitute
failure of this test.
4.5.2.17 Test procedure of tiedown provisions. With the mixer anchored by
means other than the provisions being tested, apply the proportion of the static
loads as specified in MIL-STD-209 to each attachment. Measure dimensions of the
tiedown. Failure to meet the requirements of MIL-STD-209 shall constitute
failure of this test.
4.5.2.18 Test procedure for rail shipment.
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Step 1. From one to five rail cars shall be positioned on a level section
of track. The following conditions shall be satisfied:
The total weight of the car(s) shall be at least 114,000 kilograms
(250,000 pounds).
b. The couplers between cars shall be compressed to take up any slack.
c. All of the air and hand brakes on the car(s) shall be set.
d. Any load in or on the car(s) shall be secured to prevent sliding or
shifting; any movement greater than 5 Cm shall be justification for retest.
e. The end of the buffer car to be struck must have a standard draft gear.
Step 2. Mount the test item on the test car. The test car shall be equipped
with standard draft gears and conventional underframes. Mounting of the test
item shall incorporate the standard loading and bracing method as shown in
Section 6 of the Association of American Railroads (AAR) "Rules Governing the
Loading of Department of Defense Materiel on Open Top Cars." No exotic or
unusual tiedown methods shall be used; any non-standard loading and bracing must
be approved by the Military Traffic Management Command Transportation
Engineering Agency (MTMCTEA, ATTN: MTT-TR, P.O. Box 6267, Newport News, VA
23606-0276 prior to testing.
Step 3. Situate the test car between the buffer cars and the locomotive,
and pull the test car at least 65 meters (200 feet) from the buffer car(s) along
a level section of track (a minimum distance to achieve the required locomotive
speeds).
Position the knuckles of the buffer and test cars for coupling.
Step 4.
Step 5. Install a timing device to measure the test car speed (.1 km/hr)
just prior to impact with the buffer car(s). Suggested methods include
electronic timing (microswitches) and radar. The use of torpedoes and a stop-
watch is permissible but not recommended because of the inaccuracies involved.
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