MIL-PRF-49204B(CR)
3.7 Mechanical Requirements.
The following mechanical requirements
shall apply.
3.7.1
Gages, Jigs and Fixture.
(see 4.13.4)
3.7.1.1 Gages. The contractor shall employ the following government
furnished gages to test mechanical dimensions of the applicable threaded
items.
GAGE LIST
APPLICABLE ITEM
SC-GL-3232064
Feedcone Structure Sockets
SC-GS-57620
MS-117/A
SC-SM-A-57621
MS-116/A
SC-GL-57626
AB-24/GR
3.7.1.2 Fixtures. The contractor shall furnish fixtures for measuring
cone angle of the feedcone structure and for performing the structural
integrity test of the feedcone.
3.7.2 Height. Height for the assembled antenna system from the mast
base plate to the vertical center of the feedcone structure shall be no less
than 30 feet and no greater than 32 feet.
3.7.3 Weight. Weight of the complete antenna system, with all parts
and the technical manual stowed in the bag, shall not exceed 45 pounds, 8
ounces. Weight of the feedcone structure, including the balun, shall not
exceed 3 pounds, 6 ounces. (see 4.13.1)
3.7.4 Transport size. The outside dimensions of the closed bag, with
all items properly stowed, shall not exceed 42 inches in length and 40 inches
in perimeter. (see 4.13.2)
3.7.5 Interchangeability. The system shall provide for two-way
interchangeability of parts. Selection of tolerances as shown on the drawings
shall permit any part selected from one system, to be substituted into any
other system of those on order without any problem of function or fit. (see
4.13.4)
3.7.6 Feedcone Structural Integrity. The feedcone shall be capable of
withstanding, without damage or indication of separation, a tensile force of
2000 pounds applied in a manner to separate the two cones. This 2000 pound
force shall be reduced to 1500 pounds for all Group "C" environmental post-
tests. The feedcone structure shall also be capable of withstanding a tensile
force of 250 pounds applied at the balun unbalanced connector and to the two
cones in a manner tending to separate the balun from the feedcone structure.
(see 4.13.5)
3.7.7 Air Pressure. The feedcone assembly shall be capable of
maintaining an air pressure, applied at the air pressure test vent to test the
balun seal points, to within 0.01 psi. (see 4.12.4)
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