MIL-PRF-27260D
Upon completion of the test, verification of this requirement shall be demonstrated by performing
proof-load testing in accordance with 4.7.4.
4.7.4 Proof-load.
The tie down shall be subjected to a proof load of 5,000 pounds for 30 seconds as specified in
3.8.1.
4.7.4.1 Ultimate-load.
The tie down shall be subjected to an ultimate load of 6,000 pounds for 30 seconds as specified in
3.8.2.
4.7.5 Durability.
One tie down shall be rotated for one hour in a tumbler type test fixture as shown on Figure 6.
One tie down shall be fully extended and suspended by 2 feet of strap inside the tumbler vessel
with one hook attached to the center of an inside surface of the tumbler vessel, and the other end
suspended freely in the tumbler vessel The dimensions of the tumbler vessel and orientation
during testing shall result in the tie down being suspended at least 1 inch above the inside surface
opposing the hook to tumbler vessel attachment point when the strap surface is rotated to its
highest position above the ground. The tumbler shall be designed, configured, and operated in
such a manner that causes the tie down to, at times, tumble against the inside surface(s), and
other times only supported by the strap and hook. The tumbler and installed tie down shall be
operated in this manner at a constant speed for 1 hour and approximately 7-10 revolutions per
minute. At the conclusion of this test, all tie down mechanisms shall be inspected and the hook
shall not have inadvertently released. The tie down will then be subjected to the tests specified
(see 4.7.1.2 and 4.7.1.3).
5.
PACKAGING
5.1
Packaging.
For acquisition purposes, the packaging requirements shall be as specified in the contract or
order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor
personnel, these personnel need to contact the responsible packaging activity to ascertain
packaging requirements. Packaging requirements are maintained by the Inventory Control
Point's packaging activities within the Military Service or Defense Agency, or within the military
service's system commands. Packaging data retrieval is available from the managing Military
Department's or Defense Agency's automated packaging files, CD-ROM products, or by
contacting the responsible packaging activity.
6.
NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is
not mandatory.)
6.1
Intended use.
The CGU-1/B tie down covered by this specification is a flight safety critical aircraft item and is
intended for use in securing cargo being transported in military aircraft.
6.2
Acquisition requirements.
Acquisition documents should specify the following:
a.
Title, number, and date of this specification.
b.
Item identification (see 3.12).
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