MIL-T-81311A(AS)
Test Paragraph
Requirement
4.4.6
(5) across 20 percent grade
five times in each direction.
(b) Braking loaded Trailer:
4.4.7.1
(1) on 20 percent grade from -
20 mph. within 30 ft.
4,4.7.2
(2) on level concrete from
20 mph within 30 ft.
4.3.6
(3) skidding wheels when towed
with parking brakes applied.
4.4.7.3.1
(4) parking on 20 percent grade
with trailer facing uphill
4.4.7.3.2
(S) parking on 20 percent grade
with trailer facing downhill
4.3.6
(6) brakes lock when towing force
removed.
(c) Drawbar p ull and static resistance:
4.3.5
(1) Trailer shall roll before 225
pounds is applied through
\
drawbar.
.
3.5 Environmental requirements. - Trailers supplied under this speci-
fication shall be capable of meeting, without damage, the following
environmental criteria:
Test Paragraph
Requirement
(a)
High temperature - 160°F for
4.5.1
eight hours.
(b)
Low temperature - minus 65°F
4.5.2
for eight hours.
Humidity - Method 507.1,
(c)
4.5.3
Procedure 1 of MIL-STD-810.
Sand and dust - Method 510.1,
(d)
4.5.4
Procedure 1 of MIL-STD-810.
(e)
Fording - 30 minutes immersion in
--.
water.
4.5.5
4
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