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|  MIL-B-53090(ME)
Management Command Transportation Engineering Agency (MTMCTEA), ATTN: MIT-TR, P. 0. Box
6276, Newport News, VA 23606-0276 prior to testing. The arrangement of the test item and its blocking
and tiedown to be tested shall be identical to that proposed and approved by M1MCTEA (if nonstandard).
Step 3. Situate the test car between the buffer cars and the locomotive, pull the test car at least
200 feet (65 meters) from the buffer car(s) along a level section of track (a minimum distance to achieve
the required locomotive speeds).
Step 4. Position the knuckles of the buffer and test cars for coupling.
Step 5. Install a timing device to measure the test car speed (+ or - .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 stopwatch is permissible but not recommended because of the inaccuracies involved.
Step 6. Push the test car towards the buffer car(s) and, by using the locomotive's speedometer or other
ream, release the test car when the desired test speed is reached, thus allowing the test car to freely impact
the buffer car(s).
Step 7. Repeat step 6 until the test car(s) has impacted the buffer car three tires at the same end, once
each at speed of 4, 6, and 8 mph, (6.4, 9.7 and 13 km/hr) to +0.5 mph (0.8 km/hr) or -0.0 mph (0.0 km/hr).
Reverse the test car and repeat the 8 mph (13. 0 km/hr) for a total of 4 impacts.
Note:
Adjustment of the lading or securing mechanism or reconditioning of the bracing or items of is
not allowed without a complete retest.
4.9.4 Failure criteria. Failure to meet the requirements of 3.19.4 and 4.9.3 rail impact test shall
constitute failure of this test.
5. PACKAGING
5.1 Preservation. Preservation shall be level A or C (see 6.2).
5.1.1 Level A. Unpainted or otherwise unprotected surfaces of the M1 MCBS and accessory
equipment susceptible to corrosion shall be coated with a preservative in accordance with MIL-P-116.
When removal of the preservative can be accomplished without damage to the item or where removal of the
preservative is not required, these surfaces shall be coated with P-1 preservative. Surfaces not suitable for
coating with P-1 preservative and all machined surfaces shall be coated with P-11 preservative. Machine
surfaces shall be wrapped with a barrier material conforming with MIL-B-121, grade A, and secured with
tape conforming to PPP-T-60, type IV.
5.1.2 Level C. The Ml MCBS and accessory equipment shall be preserved in accordance with,
MIL-P-116, method III.
5.2 Packing. Packing shall be level A or C (see 6.2).
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