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|  MIL-B-38977(USAF)
3.4.3 Center of Gravity. The Center of Gravity of the assembled
bomb, including all government furnished equipment shall be at
station 59.6 0.5 inches.
3.4.4 Moment of Inertia. The pitch and yaw moment of inertia about
the center of gravity of the assembled bomb shall be 745,500 + 10%
2
2
lb-in . The roll moment of inertia shall be 15,000 10% lb-in .
3.4.5 Location Reference. Station 0 shall be the forward surface of the
nose of the practice bomb,
3.4.6 Shear Force. Before relative motion between the inner and outer
deployment tubes can begin, the shear pins maintaining the field break
at Station 130.663 must shear. These pins shall be sheared by a total
shear force of 8,700-10,500 pounds.
3.5 INTERCHANGEABILITY. Parts functionally and dimensionally inter-
changeable shall be identified by the same part number. When parts are
not intechangeable, the criteria listed in MIL-D-1000 shall apply and
new drawings shall be prepared as necessary.
3.6 REUSABILITY. The unit will be reusable with a minimum of parts
replacement. The nature of the deployment operation dictates expenditures
of the refurbishment kit.
3.7 ENVIRONMENTAL REQUIREMENTS. The practice bomb shall be capable
of meeting the performance requirements of this specification during
or after, as applicable, exposure to the following environmental
conditions:
High Temperature: 418F for 20 minutes at the nose and leading
a.
edges of the fins and 300F for 20 minutes to all other exterior surfaces
of the skin.
-65F (indefinite storage). -65F for power
b. Low Temperature:
source for two hours.
Vibration incident to transportation and flight in carrying air-
c.
craft.
Shock likely to be encountered during transportation or handling.
d.
e. Shock incident to supersonic flight and maneuver of carrying
aircraft.
f. Salt spray likely to be encountered in storage or transportation
near a large body of salt water.
3.8 ELECTRICAL SYSTEM TEST. The electrical system components shall be
capable of satisfactory operation after the environmental tests of this
specification are performed.
3
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