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|  MIL-W-81752A(AS)
4.3.1.3 - Windshield test - The windshield shall be tested in
accordance with the applicable sections of MIL-A-8860 together with
any additional tests which are dictated by peculiarities in the
structure and which are deemed necessary to `insure windshield
structural Integrity.
4.3.1.3.1 - Bird impact test - Bird impact resistance tests shall
be conducted in accordance with the requirements of ASTM-F-330, The
testing shall be conducted under the mist extreme temperature
conditions likely to occur in flight below 5000 feet altitude. The
testing shall use a four pound bird.
Target locations on the
windshield shall include:
Point of maximum structural stiffness
a.
Point of minimum structural stiffness
b.
Point of maximum deflection
c.
A representative edge location
d.
Center of each windshield support member
e.
If the aircraft is equipped with a heads-up-display (HUD), the
combiner portion of the HUD, or suitable mock-up, shall be installed
in the test specimen during all bird impact testing.
4.3.1.3.2 - Ballistic testing - When specified in the contract
(See 6.2.1), tests shall be conducted in accordance with MIL-G-5485 or
as specified in the contract or purchase order.
4.3.1.3.3 - Electrical terminal test - When an electrical
anti-icing system is used for the windshield, the electrical terminals
shall be tested by applying a 100 pound tension load perpendicular to
the panel surface followed by a 50 inch-pound torque load. Cracking,
lossening of a terminal, or electrical non-continuity shall not be
permitted.
4.3.2 - Functional
testing
4.3.2.1 - General - The entire windshield system shall be tested
for proper functioning and reliable operation of all components.
4.3.2.2 Windshield defogging system - The normal windshield
defogging system shall be operated through not less than 1000 complete
A cycle shall consist of cooling the windshield to
cycles.
-30 degrees F, filling the cockpit with ambient air at 70 degrees to
90 degrees F and relative humidity of not less than eighty percent and
activating the defogging system.
Ninety percent of the transparent
area, useable for viewing from the design eye position, shall be free
of condensation within 5-minutes after the defogging system is
activate.
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