MIL-PRF-26611F
4.6.19 Shaft failure. The shafts of two tested generators and three untested first article
generators shall be made to fail. The torque required to cause failure shall be 35 to 45 inch-
pounds. The shear sections shall twist through a minimum of 270 degrees before yielding.
4.6.20 Connector strength. A force of 17 foot-pounds shall be applied perpendicular to the
longitudinal axis of the connector. There shall be no damage to the connector as a result of this
test.
4.6.21 Reliability. A minimum MTBF of 3,000 hours shall be demonstrated by satisfactory
completion of an industrially accepted reliability test indicating the MTBF shall be realized with
a confidence level of 90 percent.
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 GEU-7/A miniature tachometer generator covered by this specification is
intended for use on turboprop and turbojet engines to generate electrical signals for transmission
to magnetic-drag type indicators conforming to MIL-I-22596 and MIL-I-25623.
6.2 Acquisition requirements. Acquisition documents must specify the following:
a. Title, number, and date of the specification.
b. Item identification.
c. If qualification data is required (see 4.2).
d. Packaging requirements (see 5.1).
6.3 Qualification. With respect to products requiring qualification, awards will be made only for
products which are, at the time of award of contract, qualified for inclusion in Qualified Products
List QPL-26611 whether or not such products have actually been listed by that date. The
attention of the contractors is called to these requirements, and manufacturers are urged to
arrange to have the products that they propose to offer to the Federal Government tested for
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