MIL-S-6451E
REQUIREMENTS
3.
This specification makes provisions for preproduction
3.1 Preproduction.
testing.
3.2 Selection of standards and specifications. Standards and specifications
for necessary commodities and services not specified herein shall be selected
in accordance with MIL-STD-143.
3.3 Materials
3.3.1 Fungus-proof materials. Materials that are nutrients for fungi shall
not be used where it is practical to avoid them.
3.3.2 Protective treatment. When materials are used in construction of the
shield that are subject to deterioration when exposed to climatic and environ-
mental conditions likely to occur during service usage, they shall be protected
against such deterioration in a manner that will in no way prevent compliance
with the performance requirements of this specification. Protective coatings
that will crack, chip, or scale with age or extremes of climatic and environ-
mental conditions shall not be used.
3.3.3 Metals. Metals shall be of the corrosion-resistant type or treated
to resist corrosion due to fuels, salt fog, or atmospheric conditions likely
to be met in storage or normal service.
3.3.3.1 Dissimilar metals. Unless protected against electrolytic corrosion,
dissimilar metals shall not be used in intimate contact with each other.
Dissimilar metals are defined in MIL-STD-889.
3.3.4 Nonmetallic materials. Nonmetallic material for shields shall be in
accordance with type III, class H, grade 2, Category 5 of L-P-390. Melt
index shall not be greater than 0.35 as determined by ASTM Test Method
D1238-65T. Material noncorrosive to bare 2024 or 7075 aluminum alloy.
3.4 Design. The shield shall be designed to prevent sand, dust, water,
et cetera, from entering the engine through the air inlet duct or exhaust
tailpipe. When specified (see 6.2), class 1 shields shall serve as a medium
for attaching heater ducts for preheating aircraft or missile engines, et
cetera. When the configuration of the aircraft or missile is such that it
is impractical to fit the shield into the orifice, the shield shall be
designed to mount on the face of the orifice. When the orifice is such
that it is impractical to provide a one-piece shield, the shield shall
consist of an assembly with a minimum number of sections. When specified
by the procuring activity, shields shall be fabricated into sections to
reduce the stowage problem (see 6.2).
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business