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|  MIL-W-81752A(AS)
3.1.1 Selection of materials, parts and processes - The
materials, parts, and processes used shall be selected primarily to
Specifications
accomplish the designated Performance requirements.
and standards for all materials, parts, and processes which are not
specifically designated herein, shall be selected in accordance with
MIL-STD-143 and Military Bulletin 544 and shall require acquiring
Variations from designated items and
activity approval prior to use.
the use of newly developed advanced materials shall require acquiring
activity approval. Polycarbonate plastic shall not be used without an
environmental protection layer.
3.1.1.1 Non-specification material - The contractor shall be
required to develop specifications for materials for which no federal,
military or industry specifications exist. The specifications shall
cover technical requirements, test methods, qualification, and
acceptance criteria by the acquiring activity.
3.1.2 Windshield - A fixed windshield shall be provided forward
of the cockpit. The windshield shall be designed to provide clear
vision for the pilot and to protect the cockpit and crew as defined
For
both in this specification aid the airplane detail specification.
tandem cockpit arrangements, consideration shall be given to providing
wind blast protection for each cockpit when the canopy is jettisoned.
3.2 Design ambient conditions
3.2.1 Operations - The design ambient conditions of the
atmosphere under which equipment shall remain operational shall be in
accordance with the operations criteria of MIL-STD-210.
conditions - The windshield system shall
3.2.1.1 Environmental
withstand environmental conditions in accordance with MIL-STD-810 as
specified in 4.3.4 herein.
3.2.2 Performance - Unless otherwise specified in the contract
(See 6.2.1), the design ambient conditions of the atmosphere for
meeting the performance requirements of this specification shall be in
If a 10
accordance with the 10 percent risk criteria of MIL-STD-210.
percent risk criteria is not available for a given parameter, the
highest risk factor provided shall be used.
3.2.2.1 Aerodynamic heating - In addition to the requirements of
3.2.1, the entire windshield system shall be designed to operate as
prescribed when subjected to the effects of aerodynamic heating.
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