MIL-R-81158 Rear Cover Assembled Unit \(For Torpedo Mark 37 Mods O And 1\)This specification establishes the requirements for the procurement of a Rear Cover Assembled Unit, Bureau of Naval Weapons LD 620122, which provides the necessary connectors to adapt the acoustic panel to the wiring in the torpedo cabling.

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MIL-R-81158A(WP)

3.4.4.1 The direct current resistance between the shell of P802 and the

threaded hole marked GRD (located on the panel mounting flange) shall not

exceed 0.20 ohm.

3.5 Environmental requirements

3.5.1 Vibration. The rear cover, mounted rigidly on a vibration device

as specified in 4.5.2, shall be capable of meeting the following vibration

requirements:

3.5.1.1 Vibration, transportation. The rear cover, preserved and pack-

aged and packed as specified in the contract or order, shall be capable

of withstanding the vibration tests specified in 4.5.2.1, and thereafter

shall show no damage and shall meet all the performance and product

requirements of this specification.

3.5.1.2 Vibration, nonoperating. The rear cover, less pack and packag-

ing and self-mounted as specified in 4.5.2.2, shall be capable of withstand-

ing the vibration tests specified in 4.5.2.2 and thereafter shall show no

damage and shall meet all performance and product requirements of this

specification.

3.5.1.3 Vibration, operating. The rear cover, self-mounted as speci-

fied in 4.5.2.3, shall be capable of withstanding the vibration tests

specified in 4.5.2.3 and, during and after the tests, shall show no

damage and shall meet all performance and product requirements of this

specification.

3.5.2 Shock. The rear cover, mounted as specified in 4.5.3, shall be

capable of meeting the following shock requirements:

3.5.2.1 Shock; transportation, storage and handling. The rear cover,

preserved and packaged and packed as specified in the contract or order,

shall be capable of withstanding the shock tests specified in 4.5.3.1,

and thereafter shall show no damage and shall meet all performance and

product requirements of this specification.

3.5.2.2 Shock, nonoperating. The rear

cover, less pack and packaging

and self-mounted as specified in 4.5.3.2,

shall be capable of withstand-

ing the shock tests specified in 4.5.3.2,

and thereafter shall show no

damage and shall meet-all performance and

product requirements of this

specification.

3.5.3 Temperature. The rear cover shall be capable of meeting the

following temperature requirements:

3.5.3.1 Temperature, nonoperating condition. The rear cover shall be

capable of withstanding temperatures between minus 65 degrees F and 160

degrees F for 76 hours as specified in 4.5.4.1, and thereafter shall show

no damage and meet all performance and product requirements of this spec-

ification.