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Page Title:
Table III. Semitrailer weights, loads and speeds. |
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|  MIL-S-62469(AT)
3.5.4 Payload and speeds.
3.5.4.1 Highway operation. The trailer shall provide satisfactory operation over smooth hard
surfaced roads, when loaded with highway payload and towed at the speed specified in Table III.
When towed at specified speed in a straight line, trailer shall track the towing vehicle without
shifting or swerving more than 3 inches from side to side of the path of the towing vehicle
(see 4.8.11.2.1).
3.5.4.2 Cross-country operation. The trailer shall provide satisfactory operation over
unimproved roads, open, rolling, or hilly terrain when loaded with the maximum payload and
towed at the speed specified in table III (see 4.8.11.2.2).
TABLE III. Semitrailer weights, loads and speeds.
Semitrailer
Maximum
Maximum
weight
payload
gross weight
Speed
__________________________________________________________________________________________________________
M976-13,500 lbs
14,960 lbs (cross
30,000 lbs
20 mph cross
country or highway)
country
50 mph highway
M1033-13,500 lbs
30,000 lbs (cross
43,500 lbs
20 mph cross
country or highway)
country
50 mph highway
__________________________________________________________________________________________________________
3.5.5 Gradeability. When towed over a dry, hard surface free of loose material, the trailer
shall exhibit the gradeability and stability specified herein.
3.5.5.1 Longitudinal inclines. The trailer shall follow the towing vehicle without weaving to
an extent affecting control of the vehicle combination when ascending and descending longitudinal
inclines with 20 percent grade (see 4.8.11.3.1).
3.5.5.2 Side slopes. The trailer shall follow the towing vehicle without slipping or upsetting
when operating on left and right side slopes with 20 percent grade (see 4.8.11.3.2).
3.5.6 Braking.
3.5.6.1 Service brakes. The service brakes of the trailer and towing vehicle shall decelerate
and stop the vehicle combination with maximum payload on dry, smooth, level, hard-surfaced
roads free of loose materials. Stopping distance shall be not more than 50 feet at 20 miles per
hour (mph) (see 4.8.11.4.1).
3.5.6.2 Automatic brake actuation. The trailer shall be equipped with an automatic actuating
device to apply the trailer brakes upon breakaway from the towing vehicle. When loaded with the
maximum payload, the breakaway device shall maintain application of the brakes and hold trailer
stationary on 30 percent grade for not less than 15 minutes (see 4.8.11.4.2).
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